package controller

import (
	"strings"
	"time"

	"ezops/model"
	"ezops/pkg/siteprobe"

	"gorm.io/gorm"
)

// SiteTaskView 前端拨测任务视图（字段与前端对齐）// Logan.Li
type SiteTaskView struct {
	ID                 uint    `json:"id"`
	Name               string  `json:"name"`
	URL                string  `json:"url"`
	Type               string  `json:"type"`
	FrequencySec       int     `json:"frequency_sec"`
	TimeoutSec         int     `json:"timeout_sec"`
	ExpectedStatusCode int     `json:"expected_status_code"`
	Enabled            bool    `json:"enabled"`
	LastStatus         string  `json:"last_status,omitempty"`
	LastResponseTimeMs float64 `json:"last_response_time_ms,omitempty"`
	LastCheckedAt      *string `json:"last_checked_at,omitempty"`
	SuccessRate        float64 `json:"success_rate"`
	AlertStatus        string  `json:"alert_status"`
	Status             string  `json:"status"`
	CreatedAt          string  `json:"created_at"`
	SSLDaysRemaining   *int    `json:"ssl_days_remaining,omitempty"`
	SSLCertExpiry      *string `json:"ssl_cert_expiry,omitempty"`
}

func toSiteTaskView(task model.SiteTask) SiteTaskView {
	taskType := normalizeTaskType(task)
	enabled := task.Status == model.SiteTaskStatusRunning
	lastStatus := "unknown"
	switch task.LastResult {
	case "success":
		lastStatus = "up"
	case "fail", "timeout":
		lastStatus = "down"
	}
	var lastChecked *string
	if task.LastCheckAt != nil {
		s := task.LastCheckAt.Format("2006-01-02T15:04:05Z07:00")
		lastChecked = &s
	}
	return SiteTaskView{
		ID:                 task.ID,
		Name:               task.Name,
		URL:                task.URL,
		Type:               taskType,
		FrequencySec:       task.Frequency,
		TimeoutSec:         task.Timeout,
		ExpectedStatusCode: task.ExpectedStatus,
		Enabled:            enabled,
		LastStatus:         lastStatus,
		LastResponseTimeMs: task.AvgResponse,
		LastCheckedAt:      lastChecked,
		SuccessRate:        task.SuccessRate,
		AlertStatus:        "normal",
		Status:             string(task.Status),
		CreatedAt:          task.CreatedAt.Format("2006-01-02T15:04:05Z07:00"),
	}
}

// enrichSiteTaskViewsAlert 批量附加活跃告警状态 // Logan.Li
func enrichSiteTaskViewsAlert(db *gorm.DB, views []SiteTaskView) {
	if len(views) == 0 {
		return
	}
	// 列表加载时清理已恢复任务的陈旧 active 告警（与 down_count 对齐）// Logan.Li
	for _, v := range views {
		if v.LastStatus == "up" {
			siteprobe.ResolveRecoveredProbeAlerts(db, v.ID, "success")
		}
	}
	ids := make([]uint, 0, len(views))
	for _, v := range views {
		ids = append(ids, v.ID)
	}
	type row struct {
		TaskID uint
	}
	var rows []row
	db.Model(&model.SiteAlert{}).
		Select("DISTINCT task_id").
		Where("task_id IN ? AND status = ?", ids, model.SiteAlertStatusActive).
		Find(&rows)
	alerting := make(map[uint]bool, len(rows))
	for _, r := range rows {
		alerting[r.TaskID] = true
	}
	for i := range views {
		if !alerting[views[i].ID] {
			continue
		}
		// 最近一次拨测成功则显示正常（与 down_count 一致；SSL 证书预警走行内徽章）// Logan.Li
		if views[i].LastStatus == "up" {
			views[i].AlertStatus = "normal"
			continue
		}
		views[i].AlertStatus = "alerting"
	}
}

func normalizeTaskType(task model.SiteTask) string {
	t := strings.ToLower(string(task.TaskType))
	if t == "https" {
		return "HTTP"
	}
	if t != "" {
		return strings.ToUpper(t)
	}
	return strings.ToUpper(siteprobe.InferTaskTypePublic(task))
}

type siteSSLInfo struct {
	DaysRemaining int
	CertExpiry    *time.Time
}

// enrichSiteTaskViewsSSL 批量附加 SSL 拨测任务的证书到期信息 // Logan.Li
func enrichSiteTaskViewsSSL(db *gorm.DB, views []SiteTaskView) {
	if len(views) == 0 {
		return
	}
	ids := make([]uint, 0, len(views))
	for _, v := range views {
		if strings.ToUpper(v.Type) != "SSL" {
			continue
		}
		ids = append(ids, v.ID)
	}
	if len(ids) == 0 {
		return
	}
	type row struct {
		TaskID           uint
		SSLDaysRemaining int
		SSLCertExpiry    *time.Time
	}
	var rows []row
	db.Model(&model.SiteResult{}).
		Select("task_id, ssl_days_remaining, ssl_cert_expiry").
		Where("task_id IN ? AND ssl_cert_expiry IS NOT NULL", ids).
		Order("checked_at DESC").
		Find(&rows)
	seen := map[uint]bool{}
	sslMap := make(map[uint]siteSSLInfo, len(rows))
	for _, r := range rows {
		if seen[r.TaskID] {
			continue
		}
		seen[r.TaskID] = true
		sslMap[r.TaskID] = siteSSLInfo{DaysRemaining: r.SSLDaysRemaining, CertExpiry: r.SSLCertExpiry}
	}
	for i := range views {
		if ssl, ok := sslMap[views[i].ID]; ok {
			d := ssl.DaysRemaining
			views[i].SSLDaysRemaining = &d
			if ssl.CertExpiry != nil {
				s := ssl.CertExpiry.Format("2006-01-02T15:04:05Z07:00")
				views[i].SSLCertExpiry = &s
			}
		}
	}
}

func parseCreateTaskRequest(raw map[string]interface{}) model.SiteTask {
	getStr := func(keys ...string) string {
		for _, k := range keys {
			if v, ok := raw[k]; ok {
				if s, ok := v.(string); ok {
					return strings.TrimSpace(s)
				}
			}
		}
		return ""
	}
	getInt := func(def int, keys ...string) int {
		for _, k := range keys {
			if v, ok := raw[k]; ok {
				switch n := v.(type) {
				case float64:
					return int(n)
				case int:
					return n
				}
			}
		}
		return def
	}

	taskType := strings.ToLower(getStr("type", "task_type"))
	switch taskType {
	case "https":
		taskType = "http"
	case "":
		taskType = "http"
	}

	task := model.SiteTask{
		Name:           getStr("name"),
		URL:            getStr("url"),
		TaskType:       model.SiteTaskType(taskType),
		Method:         model.SiteTaskMethodGET,
		Timeout:        getInt(10, "timeout_sec", "timeout"),
		Frequency:      siteprobe.NormalizeProbeFrequency(taskType, getInt(0, "frequency_sec", "frequency")),
		ExpectedStatus: getInt(200, "expected_status_code", "expected_status"),
		FollowRedirect: true,
		VerifySSL:      true,
		Status:         model.SiteTaskStatusRunning,
	}
	if v, ok := raw["enabled"].(bool); ok && !v {
		task.Status = model.SiteTaskStatusPaused
	}
	if v, ok := raw["dns_resolver"].(string); ok {
		task.DNSResolver = strings.TrimSpace(v)
	}
	// 内容监控配置 // Logan.Li
	task.ContentCheckMode = normalizeContentMode(getStr("content_check_mode"))
	task.ContentPaths = getStr("content_paths")
	task.ContentIgnoreRules = getStr("content_ignore_rules")
	task.ContentMinLength = getInt(0, "content_min_length")
	task.ContentConfirmTimes = getInt(2, "content_confirm_times")
	if task.ContentConfirmTimes <= 0 {
		task.ContentConfirmTimes = 2
	}
	if v, ok := raw["content_sort_lines"].(bool); ok {
		task.ContentSortLines = v
	}
	return task
}

// normalizeContentMode 把前端传来的模式归一化，非法值一律回退为 off。 // Logan.Li
func normalizeContentMode(mode string) string {
	switch strings.ToLower(strings.TrimSpace(mode)) {
	case "text":
		return siteprobe.ContentModeText
	case "json":
		return siteprobe.ContentModeJSON
	default:
		return siteprobe.ContentModeOff
	}
}