package controller

import (
	"context"
	"crypto/sha1"
	"encoding/hex"
	"encoding/json"
	"fmt"
	"html"
	"io"
	"net/http"
	"net/url"
	"os/exec"
	"regexp"
	"sort"
	"strconv"
	"strings"
	"time"

	"ezops/model"

	"github.com/gin-gonic/gin"
	"gorm.io/gorm"
)

const jenkinsPollInterval = 5 * time.Second

type jenkinsClient struct {
	baseURL  string
	username string
	token    string
	client   *http.Client
	crumb    map[string]string
}

type jenkinsJob struct {
	Name        string       `json:"name"`
	URL         string       `json:"url"`
	Color       string       `json:"color"`
	Class       string       `json:"_class"`
	Description string       `json:"description"`
	Jobs        []jenkinsJob `json:"jobs"`
	Properties  []struct {
		ParameterDefinitions []jenkinsParameterDefinition `json:"parameterDefinitions"`
	} `json:"property"`
	ViewName  string           `json:"-"`
	ViewURL   string           `json:"-"`
	Views     []jenkinsJobView `json:"-"`
	LastBuild *struct {
		Number    int    `json:"number"`
		URL       string `json:"url"`
		Timestamp int64  `json:"timestamp"`
		Duration  int64  `json:"duration"`
		Building  bool   `json:"building"`
		Result    string `json:"result"`
	} `json:"lastBuild"`
}

type jenkinsJobView struct {
	Name string `json:"name"`
	URL  string `json:"url"`
}

type jenkinsParameterDefinition struct {
	Class                 string      `json:"_class,omitempty"`
	Name                  string      `json:"name"`
	Type                  string      `json:"type"`
	Description           string      `json:"description"`
	Choices               []string    `json:"choices,omitempty"`
	Default               interface{} `json:"default,omitempty"`
	DefaultParameterValue *struct {
		Value interface{} `json:"value"`
	} `json:"defaultParameterValue,omitempty"`
}

type jenkinsJobTree struct {
	Name        string       `json:"name"`
	URL         string       `json:"url"`
	Color       string       `json:"color"`
	Class       string       `json:"_class"`
	Description string       `json:"description"`
	Jobs        []jenkinsJob `json:"jobs"`
	Properties  []struct {
		ParameterDefinitions []jenkinsParameterDefinition `json:"parameterDefinitions"`
	} `json:"property"`
	Views     []jenkinsView `json:"views"`
	LastBuild *struct {
		Number    int    `json:"number"`
		URL       string `json:"url"`
		Timestamp int64  `json:"timestamp"`
		Duration  int64  `json:"duration"`
		Building  bool   `json:"building"`
		Result    string `json:"result"`
	} `json:"lastBuild"`
}

type jenkinsView struct {
	Name string       `json:"name"`
	URL  string       `json:"url"`
	Jobs []jenkinsJob `json:"jobs"`
}

type jenkinsQueueItem struct {
	ID         int    `json:"id"`
	Cancelled  bool   `json:"cancelled"`
	Why        string `json:"why"`
	Executable *struct {
		Number int    `json:"number"`
		URL    string `json:"url"`
	} `json:"executable"`
}

type jenkinsBuildInfo struct {
	Building  bool   `json:"building"`
	Result    string `json:"result"`
	Number    int    `json:"number"`
	URL       string `json:"url"`
	Timestamp int64  `json:"timestamp"`
	Duration  int64  `json:"duration"`
}

type jenkinsJobMetadata struct {
	Source        string   `json:"source,omitempty"`
	DefaultBranch string   `json:"default_branch,omitempty"`
	ShellSteps    []string `json:"shell_steps,omitempty"`
	Parameters    []jenkinsParameterDefinition
}

func normalizeCIProvider(provider string) string {
	if strings.EqualFold(provider, "jenkins") {
		return "jenkins"
	}
	return "aiops"
}

func normalizeJenkinsRefMode(mode string) string {
	switch strings.ToLower(strings.TrimSpace(mode)) {
	case "branch", "tag", "both":
		return strings.ToLower(strings.TrimSpace(mode))
	default:
		return "both"
	}
}

func normalizeJenkinsRefParam(param string) string {
	param = strings.TrimSpace(param)
	if param == "" {
		return "SELECT"
	}
	return param
}

func (h *PipelineHandler) getJenkinsConfig() (model.JenkinsConfig, string, error) {
	var cfg model.JenkinsConfig
	if err := h.db.Order("id ASC").First(&cfg).Error; err != nil {
		return cfg, "", err
	}
	token := ""
	if cfg.Token != "" {
		plain, err := h.crypt.Decrypt(cfg.Token)
		if err != nil {
			return cfg, "", err
		}
		token = plain
	}
	return cfg, token, nil
}

func (h *PipelineHandler) jenkinsConfigPayload(cfg model.JenkinsConfig) gin.H {
	return gin.H{
		"id":           cfg.ID,
		"base_url":     cfg.BaseURL,
		"username":     cfg.Username,
		"auth_type":    cfg.AuthType,
		"enabled":      cfg.Enabled,
		"ref_mode":     normalizeJenkinsRefMode(cfg.RefMode),
		"ref_param":    normalizeJenkinsRefParam(cfg.RefParam),
		"token_set":    cfg.Token != "",
		"last_sync_at": cfg.LastSyncAt,
		"created_at":   cfg.CreatedAt,
		"updated_at":   cfg.UpdatedAt,
	}
}

// GetJenkinsConfig 获取 Jenkins 接入配置，密钥不回显。 // Logan.Li
func (h *PipelineHandler) GetJenkinsConfig(c *gin.Context) {
	cfg, _, err := h.getJenkinsConfig()
	if err != nil {
		if err == gorm.ErrRecordNotFound {
			c.JSON(http.StatusOK, model.Response{Code: 200, Data: gin.H{"enabled": false, "token_set": false}})
			return
		}
		c.JSON(http.StatusInternalServerError, model.Response{Code: 500, Message: "读取 Jenkins 配置失败"})
		return
	}
	c.JSON(http.StatusOK, model.Response{Code: 200, Data: h.jenkinsConfigPayload(cfg)})
}

// SaveJenkinsConfig 保存 Jenkins 接入配置，Token 为空时保留旧值。 // Logan.Li
func (h *PipelineHandler) SaveJenkinsConfig(c *gin.Context) {
	var req model.JenkinsConfigRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, model.Response{Code: 400, Message: "请求参数错误: " + err.Error()})
		return
	}
	baseURL := strings.TrimRight(strings.TrimSpace(req.BaseURL), "/")
	if _, err := url.ParseRequestURI(baseURL); err != nil {
		c.JSON(http.StatusBadRequest, model.Response{Code: 400, Message: "Jenkins 地址格式不正确"})
		return
	}
	enabled := true
	if req.Enabled != nil {
		enabled = *req.Enabled
	}
	authType := req.AuthType
	if authType == "" {
		authType = "token"
	}
	var cfg model.JenkinsConfig
	err := h.db.Order("id ASC").First(&cfg).Error
	if err != nil && err != gorm.ErrRecordNotFound {
		c.JSON(http.StatusInternalServerError, model.Response{Code: 500, Message: "读取 Jenkins 配置失败"})
		return
	}
	tokenCipher := cfg.Token
	if req.Token != "" {
		enc, encErr := h.crypt.Encrypt(req.Token)
		if encErr != nil {
			c.JSON(http.StatusInternalServerError, model.Response{Code: 500, Message: "加密 Jenkins Token 失败"})
			return
		}
		tokenCipher = enc
	}
	cfg.BaseURL = baseURL
	cfg.Username = strings.TrimSpace(req.Username)
	cfg.Token = tokenCipher
	cfg.AuthType = authType
	cfg.Enabled = enabled
	cfg.RefMode = normalizeJenkinsRefMode(req.RefMode)
	cfg.RefParam = normalizeJenkinsRefParam(req.RefParam)
	if cfg.ID == 0 {
		err = h.db.Create(&cfg).Error
	} else {
		err = h.db.Save(&cfg).Error
	}
	if err != nil {
		c.JSON(http.StatusInternalServerError, model.Response{Code: 500, Message: "保存 Jenkins 配置失败"})
		return
	}
	c.JSON(http.StatusOK, model.Response{Code: 200, Message: "保存成功", Data: h.jenkinsConfigPayload(cfg)})
}

// TestJenkinsConfig 测试 Jenkins 连接。 // Logan.Li
func (h *PipelineHandler) TestJenkinsConfig(c *gin.Context) {
	cfg, token, err := h.getJenkinsConfig()
	if err != nil {
		c.JSON(http.StatusBadRequest, model.Response{Code: 400, Message: "请先保存 Jenkins 配置"})
		return
	}
	client := newJenkinsClient(cfg.BaseURL, cfg.Username, token)
	if err := client.ensureCrumb(c.Request.Context()); err != nil {
		c.JSON(http.StatusBadRequest, model.Response{Code: 400, Message: "Jenkins 连接失败: " + err.Error()})
		return
	}
	c.JSON(http.StatusOK, model.Response{Code: 200, Message: "连接成功", Data: gin.H{"base_url": cfg.BaseURL, "crumb": client.crumb != nil}})
}

// SyncJenkinsJobs 扫描 Jenkins Jobs 并同步成 AIOps 流水线。 // Logan.Li
func (h *PipelineHandler) SyncJenkinsJobs(c *gin.Context) {
	var req model.JenkinsSyncRequest
	_ = c.ShouldBindJSON(&req)
	cfg, token, err := h.getJenkinsConfig()
	if err != nil || !cfg.Enabled {
		c.JSON(http.StatusBadRequest, model.Response{Code: 400, Message: "Jenkins 未配置或未启用"})
		return
	}
	client := newJenkinsClient(cfg.BaseURL, cfg.Username, token)
	jobs, err := client.listJobs(c.Request.Context())
	if err != nil {
		c.JSON(http.StatusBadRequest, model.Response{Code: 400, Message: "同步 Jenkins Jobs 失败: " + err.Error()})
		return
	}
	created, updated, failed := 0, 0, 0
	for _, job := range jobs {
		meta := client.jobMetadata(c.Request.Context(), job.URL)
		jobViewsJSON := encodeJenkinsJobViews(job.Views)
		jobParamsJSON := encodeJenkinsParameters(mergeJenkinsParameters(job.Parameters(), meta.Parameters))
		jobStepsJSON := encodeJenkinsSteps(meta.ShellSteps)
		jobLastRunAt := jenkinsLastBuildTime(job)
		jobBranch := meta.DefaultBranch
		if jobBranch == "" {
			jobBranch = "main"
		}
		code := pipelineCodeFromJenkinsJob(req.Prefix, job.Name)
		uniqueCode := h.uniquePipelineCode(code)
		var p model.Pipeline
		err := h.db.Where("ci_provider = ? AND (jenkins_job_url = ? OR jenkins_job_name = ?)", "jenkins", job.URL, job.Name).First(&p).Error
		if err == gorm.ErrRecordNotFound {
			p = model.Pipeline{
				Name:           job.Name,
				Code:           uniqueCode,
				JobName:        uniqueCode,
				Description:    job.Description,
				Type:           "build",
				CIProvider:     "jenkins",
				Source:         meta.Source,
				Branch:         jobBranch,
				DeployMode:     "tag",
				DeployTarget:   "ssh",
				TriggerMode:    "manual",
				MaxExecutors:   1,
				Enabled:        true,
				JenkinsJobName: job.Name,
				JenkinsJobURL:  job.URL,
				JenkinsView:    job.ViewName,
				JenkinsViewURL: job.ViewURL,
				JenkinsViews:   jobViewsJSON,
				JenkinsParams:  jobParamsJSON,
				JenkinsSteps:   jobStepsJSON,
				LastRunAt:      jobLastRunAt,
				LastStatus:     jenkinsColorToStatus(job.Color),
			}
			if err := h.db.Create(&p).Error; err == nil {
				created++
			} else {
				failed++
			}
			continue
		}
		if err != nil {
			failed++
			continue
		}
		if req.Overwrite {
			p.Name = job.Name
			p.Description = job.Description
		}
		p.CIProvider = "jenkins"
		p.JenkinsJobName = job.Name
		p.JenkinsJobURL = job.URL
		p.JenkinsView = job.ViewName
		p.JenkinsViewURL = job.ViewURL
		p.JenkinsViews = jobViewsJSON
		p.JenkinsParams = jobParamsJSON
		p.JenkinsSteps = jobStepsJSON
		if meta.Source != "" {
			p.Source = meta.Source
		}
		if meta.DefaultBranch != "" {
			p.Branch = meta.DefaultBranch
		}
		if jobLastRunAt != nil {
			p.LastRunAt = jobLastRunAt
		}
		p.LastStatus = jenkinsColorToStatus(job.Color)
		if err := h.db.Save(&p).Error; err == nil {
			updated++
		} else {
			failed++
		}
	}
	now := time.Now()
	_ = h.db.Model(&model.JenkinsConfig{}).Where("id = ?", cfg.ID).Update("last_sync_at", &now).Error
	message := "同步完成"
	if len(jobs) == 0 {
		message = "同步完成，但未发现 Jenkins Jobs"
	}
	c.JSON(http.StatusOK, model.Response{Code: 200, Message: message, Data: gin.H{"created": created, "updated": updated, "failed": failed, "total": len(jobs), "views": countJenkinsViews(jobs)}})
}

// GetJenkinsRefs 只读获取 Jenkins Job 关联 Git 仓库的分支或 Tag 候选，不修改 Jenkins 配置。 // Logan.Li
func (h *PipelineHandler) GetJenkinsRefs(c *gin.Context) {
	code := strings.TrimSpace(c.Query("code"))
	refType := strings.ToLower(strings.TrimSpace(c.DefaultQuery("type", "branch")))
	if refType != "tag" {
		refType = "branch"
	}
	var pipeline model.Pipeline
	q := h.db.Where("ci_provider = ?", "jenkins")
	if code != "" {
		q = q.Where("code = ? OR job_name = ? OR jenkins_job_name = ?", code, code, code)
	} else if id, err := strconv.ParseUint(c.Query("pipeline_id"), 10, 64); err == nil && id > 0 {
		q = q.Where("id = ?", id)
	} else {
		c.JSON(http.StatusBadRequest, model.Response{Code: 400, Message: "缺少流水线编码"})
		return
	}
	if err := q.First(&pipeline).Error; err != nil {
		c.JSON(http.StatusNotFound, model.Response{Code: 404, Message: "Jenkins 流水线不存在"})
		return
	}
	source := strings.TrimSpace(pipeline.Source)
	if source == "" {
		if cfg, token, err := h.getJenkinsConfig(); err == nil && cfg.Enabled {
			client := newJenkinsClient(cfg.BaseURL, cfg.Username, token)
			meta := client.jobMetadata(c.Request.Context(), pipeline.JenkinsJobURL)
			source = meta.Source
			if source != "" || meta.DefaultBranch != "" || len(meta.ShellSteps) > 0 {
				updates := map[string]interface{}{}
				if source != "" {
					updates["source"] = source
				}
				if meta.DefaultBranch != "" {
					updates["branch"] = meta.DefaultBranch
				}
				if len(meta.ShellSteps) > 0 {
					updates["jenkins_steps"] = encodeJenkinsSteps(meta.ShellSteps)
				}
				_ = h.db.Model(&model.Pipeline{}).Where("id = ?", pipeline.ID).Updates(updates).Error
			}
		}
	}
	choices := jenkinsStaticRefChoices(pipeline, refType)
	if source != "" {
		refs, err := listGitRefs(c.Request.Context(), source, refType)
		if err == nil && len(refs) > 0 {
			choices = refs
		}
	}
	c.JSON(http.StatusOK, model.Response{Code: 200, Data: gin.H{"source": source, "type": refType, "refs": choices}})
}

func (h *PipelineHandler) triggerJenkinsPipeline(c *gin.Context, pipeline model.Pipeline, req model.TriggerPipelineRequest) {
	cfg, token, err := h.getJenkinsConfig()
	if err != nil || !cfg.Enabled {
		c.JSON(http.StatusBadRequest, model.Response{Code: 400, Message: "Jenkins 未配置或未启用"})
		return
	}
	var maxBuildNumber int
	h.db.Model(&model.PipelineRun{}).Where("pipeline_id = ?", pipeline.ID).
		Select("COALESCE(MAX(build_number), 0)").Scan(&maxBuildNumber)
	ref := req.Tag
	if ref == "" {
		ref = req.Branch
	}
	if ref == "" {
		ref = pipeline.Branch
	}
	refMode := normalizeJenkinsRefMode(cfg.RefMode)
	if refMode == "tag" && strings.TrimSpace(req.Tag) == "" {
		c.JSON(http.StatusBadRequest, model.Response{Code: 400, Message: "该 Jenkins 模式要求选择 Tag"})
		return
	}
	if refMode == "branch" && strings.TrimSpace(req.Branch) == "" {
		c.JSON(http.StatusBadRequest, model.Response{Code: 400, Message: "该 Jenkins 模式要求选择分支"})
		return
	}
	username, _ := c.Get("username")
	userStr, _ := username.(string)
	now := time.Now()
	run := model.PipelineRun{
		PipelineID:    pipeline.ID,
		BuildNumber:   maxBuildNumber + 1,
		Status:        "running",
		Branch:        ref,
		ImageTag:      req.Tag,
		TriggeredBy:   userStr,
		StartedAt:     &now,
		ExternalURL:   pipeline.JenkinsJobURL,
		BuildNodeName: "Jenkins",
	}
	if err := h.db.Create(&run).Error; err != nil {
		c.JSON(http.StatusInternalServerError, model.Response{Code: 500, Message: "触发失败"})
		return
	}
	client := newJenkinsClient(cfg.BaseURL, cfg.Username, token)
	params := map[string]string{}
	for k, v := range req.Variables {
		params[k] = v
	}
	if ref != "" {
		params[preferredJenkinsRefParam(pipeline, cfg.RefParam)] = ref
	}
	go h.executeJenkinsRun(c.Request.Context(), client, pipeline, run, params)
	c.JSON(http.StatusOK, model.Response{Code: 200, Message: "已触发 Jenkins", Data: run})
}

func (h *PipelineHandler) executeJenkinsRun(parent context.Context, client *jenkinsClient, pipeline model.Pipeline, run model.PipelineRun, params map[string]string) {
	ctx, cancel := context.WithTimeout(context.Background(), 4*time.Hour)
	defer cancel()
	logKey := fmt.Sprintf("pipeline:run:%d:logs", run.ID)
	logFn := h.jenkinsLogFn(ctx, logKey)
	start := time.Now()
	logFn("info", "Jenkins", ">>> 触发 Jenkins Job: "+pipeline.JenkinsJobName)
	queueURL, err := client.trigger(ctx, pipeline, params)
	if err != nil {
		h.finishJenkinsRun(run, pipeline, "failed", start, "", "", logKey, fmt.Sprintf("触发失败: %v", err))
		return
	}
	_ = parent
	logFn("info", "Jenkins", ">>> Jenkins 队列: "+queueURL)
	build, err := client.waitQueue(ctx, queueURL, logFn)
	if err != nil {
		h.finishJenkinsRun(run, pipeline, "failed", start, "", queueURL, logKey, fmt.Sprintf("获取构建号失败: %v", err))
		return
	}
	buildNumber := strconv.Itoa(build.Number)
	_ = h.db.Model(&model.PipelineRun{}).Where("id = ?", run.ID).Updates(map[string]interface{}{
		"external_run_id": buildNumber,
		"external_url":    build.URL,
		"build_number":    build.Number,
	}).Error
	logFn("info", "Jenkins", fmt.Sprintf(">>> Jenkins Build #%d: %s", build.Number, build.URL))
	final, err := client.waitBuild(ctx, build.URL, logFn)
	if err != nil {
		h.finishJenkinsRun(run, pipeline, "failed", start, buildNumber, build.URL, logKey, fmt.Sprintf("轮询失败: %v", err))
		return
	}
	status := "failed"
	if final.Result == "SUCCESS" {
		status = "success"
	} else if final.Result == "ABORTED" {
		status = "cancelled"
	}
	h.finishJenkinsRun(run, pipeline, status, start, buildNumber, final.URL, logKey, "Jenkins result: "+final.Result)
}

func (h *PipelineHandler) jenkinsLogFn(ctx context.Context, logKey string) func(string, string, string) {
	return func(level, stage, msg string) {
		entry := LogEntry{Time: time.Now().Format("15:04:05"), Level: level, Stage: stage, Message: msg}
		if h.cache == nil {
			return
		}
		existing, _ := h.cache.Get(ctx, logKey)
		var entries []LogEntry
		if existing != "" {
			_ = json.Unmarshal([]byte(existing), &entries)
		}
		entries = append(entries, entry)
		buf, _ := json.Marshal(entries)
		_ = h.cache.Set(ctx, logKey, string(buf), 30*time.Minute)
	}
}

func (h *PipelineHandler) finishJenkinsRun(run model.PipelineRun, pipeline model.Pipeline, status string, start time.Time, externalID, externalURL, logKey, message string) {
	now := time.Now()
	duration := int(now.Sub(start).Seconds())
	logFn := h.jenkinsLogFn(context.Background(), logKey)
	level := "info"
	if status == "failed" {
		level = "error"
	}
	logFn(level, "Jenkins", ">>> "+message)
	logs, _ := h.cache.Get(context.Background(), logKey)
	updates := map[string]interface{}{
		"status":      status,
		"duration":    duration,
		"finished_at": &now,
		"logs":        logs,
	}
	if externalID != "" {
		updates["external_run_id"] = externalID
	}
	if externalURL != "" {
		updates["external_url"] = externalURL
	}
	_ = h.db.Model(&model.PipelineRun{}).Where("id = ?", run.ID).Updates(updates).Error
	pUpdates := map[string]interface{}{"last_status": status, "last_run_at": now, "run_count": gorm.Expr("run_count + ?", 1)}
	if status == "success" {
		pUpdates["success_count"] = gorm.Expr("success_count + ?", 1)
	} else if status == "failed" {
		pUpdates["fail_count"] = gorm.Expr("fail_count + ?", 1)
	}
	_ = h.db.Model(&model.Pipeline{}).Where("id = ?", pipeline.ID).Updates(pUpdates).Error
}

func newJenkinsClient(baseURL, username, token string) *jenkinsClient {
	return &jenkinsClient{
		baseURL:  strings.TrimRight(baseURL, "/"),
		username: username,
		token:    token,
		client:   &http.Client{Timeout: 30 * time.Second},
	}
}

func (c *jenkinsClient) request(ctx context.Context, method, rawURL string, form url.Values) (*http.Response, error) {
	var body *strings.Reader
	if form != nil {
		body = strings.NewReader(form.Encode())
	} else {
		body = strings.NewReader("")
	}
	req, err := http.NewRequestWithContext(ctx, method, rawURL, body)
	if err != nil {
		return nil, err
	}
	if c.username != "" || c.token != "" {
		req.SetBasicAuth(c.username, c.token)
	}
	if form != nil {
		req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
	}
	for k, v := range c.crumb {
		req.Header.Set(k, v)
	}
	return c.client.Do(req)
}

func (c *jenkinsClient) ensureCrumb(ctx context.Context) error {
	resp, err := c.request(ctx, http.MethodGet, c.baseURL+"/crumbIssuer/api/json", nil)
	if err != nil {
		return err
	}
	defer resp.Body.Close()
	if resp.StatusCode == http.StatusNotFound || resp.StatusCode == http.StatusForbidden {
		return nil
	}
	if resp.StatusCode < 200 || resp.StatusCode >= 300 {
		return fmt.Errorf("crumb status %d", resp.StatusCode)
	}
	var data struct {
		Field string `json:"crumbRequestField"`
		Crumb string `json:"crumb"`
	}
	if err := json.NewDecoder(resp.Body).Decode(&data); err != nil {
		return err
	}
	if data.Field != "" && data.Crumb != "" {
		c.crumb = map[string]string{data.Field: data.Crumb}
	}
	return nil
}

func (c *jenkinsClient) listJobs(ctx context.Context) ([]jenkinsJob, error) {
	if err := c.ensureCrumb(ctx); err != nil {
		return nil, err
	}
	visited := map[string]bool{}
	return c.listJobsAt(ctx, c.baseURL, 0, visited)
}

func (c *jenkinsClient) listJobsAt(ctx context.Context, rootURL string, depth int, visited map[string]bool) ([]jenkinsJob, error) {
	if depth > 8 {
		return nil, nil
	}
	apiURL := strings.TrimRight(rootURL, "/") + "/api/json?tree=" + url.QueryEscape("name,url,color,description,_class,property[parameterDefinitions[_class,name,type,description,choices,defaultParameterValue[value]]],lastBuild[number,url,timestamp,duration,building,result],jobs[name,url,color,description,_class,property[parameterDefinitions[_class,name,type,description,choices,defaultParameterValue[value]]],lastBuild[number,url,timestamp,duration,building,result],jobs[name,url]],views[name,url,jobs[name,url,color,description,_class,property[parameterDefinitions[_class,name,type,description,choices,defaultParameterValue[value]]],lastBuild[number,url,timestamp,duration,building,result]]]")
	resp, err := c.request(ctx, http.MethodGet, apiURL, nil)
	if err != nil {
		return nil, err
	}
	defer resp.Body.Close()
	if resp.StatusCode < 200 || resp.StatusCode >= 300 {
		return nil, fmt.Errorf("jobs api status %d", resp.StatusCode)
	}
	var root jenkinsJobTree
	if err := json.NewDecoder(resp.Body).Decode(&root); err != nil {
		return nil, err
	}
	out := make([]jenkinsJob, 0)
	if len(root.Jobs) == 0 && isBuildableJenkinsJob(root.Name, root.URL, root.Color, root.Class, root.LastBuild != nil) {
		return []jenkinsJob{{
			Name:        root.Name,
			URL:         root.URL,
			Color:       root.Color,
			Class:       root.Class,
			Description: root.Description,
			LastBuild:   root.LastBuild,
		}}, nil
	}
	merged := map[string]jenkinsJob{}
	for _, job := range root.Jobs {
		children, err := c.collectJenkinsJob(ctx, job, depth, visited)
		if err != nil {
			return nil, err
		}
		mergeJenkinsJobs(merged, children...)
	}
	for _, view := range root.Views {
		for _, job := range view.Jobs {
			viewVisited := map[string]bool{}
			children, err := c.collectJenkinsJob(ctx, job, depth, viewVisited)
			if err != nil {
				return nil, err
			}
			for i := range children {
				children[i].ViewName = view.Name
				children[i].ViewURL = view.URL
				children[i].Views = appendJenkinsJobView(children[i].Views, jenkinsJobView{Name: view.Name, URL: view.URL})
			}
			mergeJenkinsJobs(merged, children...)
		}
	}
	keys := make([]string, 0, len(merged))
	for key := range merged {
		keys = append(keys, key)
	}
	sort.Strings(keys)
	for _, key := range keys {
		job := merged[key]
		out = append(out, job)
	}
	return out, nil
}

func (c *jenkinsClient) collectJenkinsJob(ctx context.Context, job jenkinsJob, depth int, visited map[string]bool) ([]jenkinsJob, error) {
	key := strings.TrimRight(job.URL, "/")
	if key == "" || visited[key] {
		return nil, nil
	}
	visited[key] = true
	if len(job.Jobs) > 0 || isContainerJenkinsJob(job.Class) {
		children, err := c.listJobsAt(ctx, job.URL, depth+1, visited)
		if err != nil {
			return nil, err
		}
		if len(children) > 0 {
			return children, nil
		}
		if !isBuildableJenkinsJob(job.Name, job.URL, job.Color, job.Class, job.LastBuild != nil) {
			return nil, nil
		}
	}
	if !isBuildableJenkinsJob(job.Name, job.URL, job.Color, job.Class, job.LastBuild != nil) {
		return nil, nil
	}
	return []jenkinsJob{job}, nil
}

func (c *jenkinsClient) jobMetadata(ctx context.Context, jobURL string) jenkinsJobMetadata {
	var meta jenkinsJobMetadata
	xmlText := c.configXML(ctx, jobURL)
	if xmlText == "" {
		return meta
	}
	meta.Source = firstXMLValue(xmlText, `(?s)<hudson\.plugins\.git\.UserRemoteConfig>.*?<url>(.*?)</url>`)
	if meta.Source == "" {
		meta.Source = firstXMLValue(xmlText, `(?s)<scm[^>]*>.*?<url>(.*?)</url>`)
	}
	meta.DefaultBranch = normalizeJenkinsBranch(firstXMLValue(xmlText, `(?s)<branches>.*?<name>(.*?)</name>`))
	meta.ShellSteps = allXMLValues(xmlText, `(?s)<hudson\.tasks\.Shell>.*?<command>(.*?)</command>`)
	meta.Parameters = parseJenkinsConfigParameters(xmlText)
	if meta.Source == "" {
		meta.Source = sourceFromJenkinsParameters(meta.Parameters)
	}
	return meta
}

func (c *jenkinsClient) configXML(ctx context.Context, jobURL string) string {
	jobURL = strings.TrimRight(jobURL, "/")
	if jobURL == "" {
		return ""
	}
	resp, err := c.request(ctx, http.MethodGet, jobURL+"/config.xml", nil)
	if err != nil {
		return ""
	}
	defer resp.Body.Close()
	if resp.StatusCode < 200 || resp.StatusCode >= 300 {
		return ""
	}
	b, _ := io.ReadAll(resp.Body)
	return string(b)
}

func firstXMLValue(raw, pattern string) string {
	values := allXMLValues(raw, pattern)
	if len(values) == 0 {
		return ""
	}
	return values[0]
}

func allXMLValues(raw, pattern string) []string {
	re := regexp.MustCompile(pattern)
	matches := re.FindAllStringSubmatch(raw, -1)
	out := make([]string, 0, len(matches))
	for _, match := range matches {
		if len(match) < 2 {
			continue
		}
		value := strings.TrimSpace(html.UnescapeString(match[1]))
		if value != "" {
			out = append(out, value)
		}
	}
	return out
}

func normalizeJenkinsBranch(branch string) string {
	branch = strings.TrimSpace(branch)
	branch = strings.TrimPrefix(branch, "*/")
	branch = strings.TrimPrefix(branch, "origin/")
	if branch == "" || strings.ContainsAny(branch, "*$") {
		return ""
	}
	return branch
}

func parseJenkinsConfigParameters(raw string) []jenkinsParameterDefinition {
	re := regexp.MustCompile(`(?s)<([^/][^>\s]*ParameterDefinition[^>]*)>(.*?)</[^>]*ParameterDefinition>`)
	matches := re.FindAllStringSubmatch(raw, -1)
	out := make([]jenkinsParameterDefinition, 0, len(matches))
	for _, match := range matches {
		if len(match) < 3 {
			continue
		}
		className := strings.TrimSpace(match[1])
		body := match[2]
		name := firstXMLValue(body, `(?s)<name>(.*?)</name>`)
		if name == "" {
			continue
		}
		def := jenkinsParameterDefinition{
			Class:       className,
			Name:        name,
			Type:        className,
			Description: firstXMLValue(body, `(?s)<description>(.*?)</description>`),
			Choices:     parseJenkinsConfigChoices(body),
		}
		if v := firstXMLValue(body, `(?s)<defaultValue>(.*?)</defaultValue>`); v != "" {
			def.Default = v
		} else if v := firstXMLValue(body, `(?s)<defaultParameterValue>.*?<value>(.*?)</value>`); v != "" {
			def.Default = v
		}
		out = append(out, def)
	}
	return out
}

func parseJenkinsConfigChoices(body string) []string {
	choicesBlock := firstXMLValue(body, `(?s)<choices[^>]*>(.*?)</choices>`)
	if choicesBlock != "" {
		choices := allXMLValues(choicesBlock, `(?s)<string>(.*?)</string>`)
		if len(choices) > 0 {
			return uniqueSortedStrings(choices)
		}
	}
	value := firstXMLValue(body, `(?s)<value>(.*?)</value>`)
	if value == "" {
		value = firstXMLValue(body, `(?s)<defaultValue>(.*?)</defaultValue>`)
	}
	if strings.Contains(value, ",") || strings.Contains(value, "\n") {
		parts := regexp.MustCompile(`[,\n\r]+`).Split(value, -1)
		return uniqueSortedStrings(parts)
	}
	return nil
}

func mergeJenkinsParameters(primary, fallback []jenkinsParameterDefinition) []jenkinsParameterDefinition {
	merged := map[string]jenkinsParameterDefinition{}
	order := []string{}
	add := func(def jenkinsParameterDefinition) {
		name := strings.TrimSpace(def.Name)
		if name == "" {
			return
		}
		existing, ok := merged[name]
		if !ok {
			order = append(order, name)
			merged[name] = def
			return
		}
		if existing.Type == "" {
			existing.Type = def.Type
		}
		if existing.Class == "" {
			existing.Class = def.Class
		}
		if existing.Description == "" {
			existing.Description = def.Description
		}
		if len(existing.Choices) == 0 {
			existing.Choices = def.Choices
		}
		if existing.Default == nil {
			existing.Default = def.Default
		}
		merged[name] = existing
	}
	for _, def := range primary {
		add(def)
	}
	for _, def := range fallback {
		add(def)
	}
	out := make([]jenkinsParameterDefinition, 0, len(order))
	for _, name := range order {
		out = append(out, merged[name])
	}
	return out
}

func sourceFromJenkinsParameters(params []jenkinsParameterDefinition) string {
	for _, param := range params {
		name := strings.ToLower(strings.TrimSpace(param.Name))
		if name != "git_url" && name != "giturl" && name != "repo_url" && name != "repository" {
			continue
		}
		if param.Default != nil {
			if v := strings.TrimSpace(fmt.Sprint(param.Default)); strings.Contains(v, ".git") || strings.Contains(v, "://") || strings.Contains(v, "@") {
				return v
			}
		}
	}
	return ""
}

func mergeJenkinsJobs(merged map[string]jenkinsJob, jobs ...jenkinsJob) {
	for _, job := range jobs {
		key := strings.TrimRight(job.URL, "/")
		if key == "" {
			key = job.Name
		}
		existing, ok := merged[key]
		if !ok {
			job.Views = normalizeJenkinsJobViews(job.Views)
			job.ViewName, job.ViewURL = preferredJenkinsJobView(job.Views, job.ViewName, job.ViewURL)
			merged[key] = job
			continue
		}
		existing.Views = normalizeJenkinsJobViews(append(existing.Views, job.Views...))
		existing.ViewName, existing.ViewURL = preferredJenkinsJobView(existing.Views, existing.ViewName, existing.ViewURL)
		if existing.Color == "" {
			existing.Color = job.Color
		}
		if existing.Description == "" {
			existing.Description = job.Description
		}
		if existing.LastBuild == nil {
			existing.LastBuild = job.LastBuild
		}
		merged[key] = existing
	}
}

func appendJenkinsJobView(views []jenkinsJobView, view jenkinsJobView) []jenkinsJobView {
	if strings.TrimSpace(view.Name) == "" {
		return views
	}
	for _, item := range views {
		if item.Name == view.Name && item.URL == view.URL {
			return views
		}
	}
	return append(views, view)
}

func normalizeJenkinsJobViews(views []jenkinsJobView) []jenkinsJobView {
	out := make([]jenkinsJobView, 0, len(views))
	for _, view := range views {
		out = appendJenkinsJobView(out, view)
	}
	sort.Slice(out, func(i, j int) bool {
		return strings.ToLower(out[i].Name) < strings.ToLower(out[j].Name)
	})
	return out
}

func preferredJenkinsJobView(views []jenkinsJobView, fallbackName, fallbackURL string) (string, string) {
	for _, view := range views {
		if !strings.EqualFold(view.Name, "all") {
			return view.Name, view.URL
		}
	}
	for _, view := range views {
		if strings.TrimSpace(view.Name) != "" {
			return view.Name, view.URL
		}
	}
	return fallbackName, fallbackURL
}

func encodeJenkinsJobViews(views []jenkinsJobView) string {
	views = normalizeJenkinsJobViews(views)
	if len(views) == 0 {
		return ""
	}
	buf, err := json.Marshal(views)
	if err != nil {
		return ""
	}
	return string(buf)
}

func countJenkinsViews(jobs []jenkinsJob) int {
	seen := map[string]bool{}
	for _, job := range jobs {
		for _, view := range job.Views {
			if strings.TrimSpace(view.Name) != "" && !strings.EqualFold(view.Name, "all") {
				seen[view.Name] = true
			}
		}
	}
	return len(seen)
}

func (job jenkinsJob) Parameters() []jenkinsParameterDefinition {
	out := []jenkinsParameterDefinition{}
	for _, prop := range job.Properties {
		for _, def := range prop.ParameterDefinitions {
			if strings.TrimSpace(def.Name) == "" {
				continue
			}
			if def.Default == nil && def.DefaultParameterValue != nil {
				def.Default = def.DefaultParameterValue.Value
			}
			out = append(out, def)
		}
	}
	return out
}

func encodeJenkinsParameters(params []jenkinsParameterDefinition) string {
	if len(params) == 0 {
		return ""
	}
	buf, err := json.Marshal(params)
	if err != nil {
		return ""
	}
	return string(buf)
}

func encodeJenkinsSteps(steps []string) string {
	if len(steps) == 0 {
		return ""
	}
	items := make([]gin.H, 0, len(steps))
	for i, step := range steps {
		items = append(items, gin.H{"type": "shell", "name": fmt.Sprintf("Shell #%d", i+1), "command": step})
	}
	buf, err := json.Marshal(items)
	if err != nil {
		return ""
	}
	return string(buf)
}

func preferredJenkinsRefParam(pipeline model.Pipeline, fallback string) string {
	params := decodeJenkinsParameters(pipeline.JenkinsParams)
	for _, param := range params {
		if strings.EqualFold(param.Name, fallback) {
			return param.Name
		}
	}
	for _, param := range params {
		if strings.Contains(param.Type, "GitParameterDefinition") || strings.HasPrefix(param.Type, "PT_") {
			return param.Name
		}
	}
	return normalizeJenkinsRefParam(fallback)
}

func decodeJenkinsParameters(raw string) []jenkinsParameterDefinition {
	var params []jenkinsParameterDefinition
	if strings.TrimSpace(raw) == "" {
		return params
	}
	_ = json.Unmarshal([]byte(raw), &params)
	return params
}

func jenkinsStaticRefChoices(pipeline model.Pipeline, refType string) []string {
	out := []string{}
	for _, param := range decodeJenkinsParameters(pipeline.JenkinsParams) {
		if len(param.Choices) > 0 {
			for _, choice := range param.Choices {
				if strings.TrimSpace(choice) != "" {
					out = append(out, choice)
				}
			}
		}
		if param.Default != nil {
			if v := strings.TrimSpace(fmt.Sprint(param.Default)); v != "" {
				out = append(out, v)
			}
		}
	}
	if refType == "branch" && strings.TrimSpace(pipeline.Branch) != "" {
		out = append(out, pipeline.Branch)
	}
	return uniqueSortedStrings(out)
}

func uniqueSortedStrings(items []string) []string {
	seen := map[string]bool{}
	out := make([]string, 0, len(items))
	for _, item := range items {
		item = strings.TrimSpace(item)
		if item == "" || seen[item] {
			continue
		}
		seen[item] = true
		out = append(out, item)
	}
	sort.Strings(out)
	return out
}

func listGitRefs(ctx context.Context, repoURL, refType string) ([]string, error) {
	args := []string{"ls-remote", "--refs"}
	if refType == "tag" {
		args = append(args, "--tags")
	} else {
		args = append(args, "--heads")
	}
	args = append(args, repoURL)
	ctx, cancel := context.WithTimeout(ctx, 20*time.Second)
	defer cancel()
	cmd := exec.CommandContext(ctx, "git", args...)
	out, err := cmd.Output()
	if err != nil {
		return nil, err
	}
	prefix := "refs/heads/"
	if refType == "tag" {
		prefix = "refs/tags/"
	}
	refs := []string{}
	for _, line := range strings.Split(string(out), "\n") {
		parts := strings.Fields(line)
		if len(parts) < 2 || !strings.HasPrefix(parts[1], prefix) {
			continue
		}
		ref := strings.TrimPrefix(parts[1], prefix)
		ref = strings.TrimSuffix(ref, "^{}")
		if ref != "" {
			refs = append(refs, ref)
		}
	}
	return uniqueSortedStrings(refs), nil
}

func jenkinsLastBuildTime(job jenkinsJob) *time.Time {
	if job.LastBuild == nil || job.LastBuild.Timestamp <= 0 {
		return nil
	}
	t := time.UnixMilli(job.LastBuild.Timestamp)
	return &t
}

func isContainerJenkinsJob(className string) bool {
	className = strings.ToLower(className)
	return strings.Contains(className, "folder") ||
		strings.Contains(className, "multibranch") ||
		strings.Contains(className, "organizationfolder")
}

func isBuildableJenkinsJob(name, jobURL, color, className string, hasLastBuild bool) bool {
	if strings.TrimSpace(name) == "" || strings.TrimSpace(jobURL) == "" {
		return false
	}
	if isContainerJenkinsJob(className) {
		return false
	}
	className = strings.ToLower(className)
	return color != "" ||
		hasLastBuild ||
		strings.Contains(className, "workflowjob") ||
		strings.Contains(className, "freestyleproject") ||
		strings.Contains(className, "mavenmoduleset") ||
		strings.Contains(className, "matrixproject") ||
		strings.Contains(className, "job")
}

func (c *jenkinsClient) trigger(ctx context.Context, pipeline model.Pipeline, params map[string]string) (string, error) {
	if err := c.ensureCrumb(ctx); err != nil {
		return "", err
	}
	jobURL := strings.TrimRight(pipeline.JenkinsJobURL, "/")
	if jobURL == "" {
		jobURL = c.baseURL + "/job/" + url.PathEscape(pipeline.JenkinsJobName)
	}
	form := url.Values{}
	for k, v := range params {
		if strings.TrimSpace(v) != "" {
			form.Set(k, v)
		}
	}
	endpoint := jobURL + "/build"
	if len(form) > 0 {
		endpoint = jobURL + "/buildWithParameters"
	}
	resp, err := c.request(ctx, http.MethodPost, endpoint, form)
	if err != nil {
		return "", err
	}
	defer resp.Body.Close()
	if resp.StatusCode != http.StatusCreated && resp.StatusCode != http.StatusFound && resp.StatusCode != http.StatusOK {
		return "", fmt.Errorf("trigger status %d", resp.StatusCode)
	}
	queueURL := resp.Header.Get("Location")
	if queueURL == "" {
		queueURL = jobURL + "/lastBuild"
	}
	return queueURL, nil
}

func (c *jenkinsClient) waitQueue(ctx context.Context, queueURL string, logFn func(string, string, string)) (jenkinsBuildInfo, error) {
	if strings.Contains(queueURL, "/lastBuild") {
		return c.getBuild(ctx, queueURL)
	}
	apiURL := strings.TrimRight(queueURL, "/") + "/api/json"
	for {
		select {
		case <-ctx.Done():
			return jenkinsBuildInfo{}, ctx.Err()
		case <-time.After(jenkinsPollInterval):
		}
		resp, err := c.request(ctx, http.MethodGet, apiURL, nil)
		if err != nil {
			return jenkinsBuildInfo{}, err
		}
		var item jenkinsQueueItem
		err = json.NewDecoder(resp.Body).Decode(&item)
		resp.Body.Close()
		if err != nil {
			return jenkinsBuildInfo{}, err
		}
		if item.Cancelled {
			return jenkinsBuildInfo{}, fmt.Errorf("queue cancelled: %s", item.Why)
		}
		if item.Executable != nil {
			return jenkinsBuildInfo{Number: item.Executable.Number, URL: item.Executable.URL, Building: true}, nil
		}
		if item.Why != "" {
			logFn("info", "Jenkins", ">>> 等待队列: "+item.Why)
		}
	}
}

func (c *jenkinsClient) waitBuild(ctx context.Context, buildURL string, logFn func(string, string, string)) (jenkinsBuildInfo, error) {
	var consoleOffset int64
	for {
		build, err := c.getBuild(ctx, buildURL)
		if err != nil {
			return build, err
		}
		console, nextOffset, _ := c.progressiveConsoleText(ctx, buildURL, consoleOffset)
		if console != "" {
			logJenkinsConsoleChunk(logFn, console)
			consoleOffset = nextOffset
		}
		if !build.Building && build.Result != "" {
			console, _, _ := c.progressiveConsoleText(ctx, buildURL, consoleOffset)
			if console != "" {
				logJenkinsConsoleChunk(logFn, console)
			}
			return build, nil
		}
		logFn("info", "Jenkins", fmt.Sprintf(">>> Build #%d 仍在执行...", build.Number))
		select {
		case <-ctx.Done():
			return build, ctx.Err()
		case <-time.After(jenkinsPollInterval):
		}
	}
}

func (c *jenkinsClient) getBuild(ctx context.Context, buildURL string) (jenkinsBuildInfo, error) {
	resp, err := c.request(ctx, http.MethodGet, strings.TrimRight(buildURL, "/")+"/api/json", nil)
	if err != nil {
		return jenkinsBuildInfo{}, err
	}
	defer resp.Body.Close()
	if resp.StatusCode < 200 || resp.StatusCode >= 300 {
		return jenkinsBuildInfo{}, fmt.Errorf("build api status %d", resp.StatusCode)
	}
	var info jenkinsBuildInfo
	if err := json.NewDecoder(resp.Body).Decode(&info); err != nil {
		return info, err
	}
	if info.URL == "" {
		info.URL = strings.TrimRight(buildURL, "/")
	}
	return info, nil
}

func (c *jenkinsClient) consoleText(ctx context.Context, buildURL string) string {
	resp, err := c.request(ctx, http.MethodGet, strings.TrimRight(buildURL, "/")+"/consoleText", nil)
	if err != nil {
		return ""
	}
	defer resp.Body.Close()
	if resp.StatusCode < 200 || resp.StatusCode >= 300 {
		return ""
	}
	b, _ := io.ReadAll(resp.Body)
	return string(b)
}

func (c *jenkinsClient) progressiveConsoleText(ctx context.Context, buildURL string, start int64) (string, int64, bool) {
	endpoint := fmt.Sprintf("%s/logText/progressiveText?start=%d", strings.TrimRight(buildURL, "/"), start)
	resp, err := c.request(ctx, http.MethodGet, endpoint, nil)
	if err != nil {
		return "", start, false
	}
	defer resp.Body.Close()
	if resp.StatusCode < 200 || resp.StatusCode >= 300 {
		return "", start, false
	}
	b, _ := io.ReadAll(resp.Body)
	next := start
	if h := resp.Header.Get("X-Text-Size"); h != "" {
		if n, err := strconv.ParseInt(h, 10, 64); err == nil {
			next = n
		}
	} else {
		next = start + int64(len(b))
	}
	return string(b), next, strings.EqualFold(resp.Header.Get("X-More-Data"), "true")
}

func logJenkinsConsoleChunk(logFn func(string, string, string), chunk string) {
	normalized := strings.ReplaceAll(chunk, "\r\n", "\n")
	normalized = strings.ReplaceAll(normalized, "\r", "\n")
	for _, line := range strings.Split(normalized, "\n") {
		if strings.TrimSpace(line) == "" {
			continue
		}
		logFn("info", "Console", line)
	}
}

func pipelineCodeFromJenkinsJob(prefix, name string) string {
	parts := []string{}
	if strings.TrimSpace(prefix) != "" {
		parts = append(parts, strings.TrimSpace(prefix))
	}
	parts = append(parts, strings.TrimSpace(name))
	raw := strings.ToLower(strings.Join(parts, "-"))
	re := regexp.MustCompile(`[^a-z0-9]+`)
	code := strings.Trim(re.ReplaceAllString(raw, "-"), "-")
	if code == "" {
		code = "jenkins-job"
	}
	if len(code) > 54 {
		sum := sha1.Sum([]byte(raw))
		code = strings.Trim(code[:54], "-") + "-" + hex.EncodeToString(sum[:])[:8]
	}
	return code
}

func (h *PipelineHandler) uniquePipelineCode(base string) string {
	code := base
	for i := 0; i < 100; i++ {
		var count int64
		h.db.Model(&model.Pipeline{}).Where("code = ? OR job_name = ?", code, code).Count(&count)
		if count == 0 {
			return code
		}
		code = fmt.Sprintf("%s-%d", strings.TrimRight(base, "-"), i+1)
		if len(code) > 64 {
			code = code[:64]
		}
	}
	return base + "-jenkins"
}

func jenkinsColorToStatus(color string) string {
	color = strings.ToLower(color)
	switch {
	case strings.Contains(color, "blue"):
		return "success"
	case strings.Contains(color, "red"):
		return "failed"
	case strings.Contains(color, "anime"):
		return "running"
	default:
		return ""
	}
}