package controller

import (
	"net/http"
	"strconv"
	"strings"
	"time"

	"ezops/model"
	"ezops/pkg/remoteexec"

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

// ListBuildNodes 构建节点列表 // Logan.Li
func (h *PipelineHandler) ListBuildNodes(c *gin.Context) {
	masterCfg := h.ensureBuildMasterConfig()
	var nodes []model.BuildNode
	h.db.Order("id ASC").Find(&nodes)

	// 填充运行时负载与服务器信息
	nodeMu.Lock()
	for i := range nodes {
		nodes[i].RunningCount = nodeRunningCount[nodes[i].ID]
		var srv model.Server
		if err := h.db.First(&srv, nodes[i].ServerID).Error; err == nil {
			nodes[i].Hostname = srv.Hostname
			nodes[i].IP = srv.IP
		}
	}
	masterRunning := nodeRunningCount[0]
	nodeMu.Unlock()

	c.JSON(http.StatusOK, model.Response{
		Code: 200,
		Data: map[string]interface{}{
			"list": nodes,
			"total": len(nodes),
			"master": map[string]interface{}{
				"name":          "Master",
				"max_executors": masterCfg.MaxExecutors,
				"running_count": masterRunning,
			},
		},
	})
}

// CreateBuildNode 创建构建节点 // Logan.Li
func (h *PipelineHandler) CreateBuildNode(c *gin.Context) {
	var req model.CreateBuildNodeRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, model.Response{Code: 400, Message: "参数错误: " + err.Error()})
		return
	}
	req.Name = strings.TrimSpace(req.Name)
	if req.Name == "" {
		c.JSON(http.StatusBadRequest, model.Response{Code: 400, Message: "节点名称不能为空"})
		return
	}
	var srv model.Server
	if err := h.db.First(&srv, req.ServerID).Error; err != nil {
		c.JSON(http.StatusBadRequest, model.Response{Code: 400, Message: "关联服务器不存在"})
		return
	}
	var dup int64
	h.db.Model(&model.BuildNode{}).Where("name = ?", req.Name).Count(&dup)
	if dup > 0 {
		c.JSON(http.StatusBadRequest, model.Response{Code: 400, Message: "节点名称已存在"})
		return
	}

	node := model.BuildNode{
		Name:          req.Name,
		Description:   req.Description,
		ServerID:      req.ServerID,
		Labels:        req.Labels,
		MaxExecutors:  req.MaxExecutors,
		WorkspacePath: req.WorkspacePath,
		Enabled:       true,
	}
	if node.MaxExecutors <= 0 {
		node.MaxExecutors = 2
	}
	if strings.TrimSpace(node.WorkspacePath) == "" {
		node.WorkspacePath = "/data/aiops-workspace"
	}

	if err := h.db.Create(&node).Error; err != nil {
		c.JSON(http.StatusInternalServerError, model.Response{Code: 500, Message: "创建失败"})
		return
	}
	node.Hostname = srv.Hostname
	node.IP = srv.IP
	c.JSON(http.StatusOK, model.Response{Code: 200, Message: "创建成功", Data: node})
}

// UpdateBuildNode 更新构建节点 // Logan.Li
func (h *PipelineHandler) UpdateBuildNode(c *gin.Context) {
	id, _ := strconv.ParseUint(c.Param("id"), 10, 64)
	var node model.BuildNode
	if err := h.db.First(&node, id).Error; err != nil {
		c.JSON(http.StatusNotFound, model.Response{Code: 404, Message: "节点不存在"})
		return
	}
	var req model.UpdateBuildNodeRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, model.Response{Code: 400, Message: "参数错误"})
		return
	}
	updates := map[string]interface{}{}
	if req.Name != "" {
		updates["name"] = strings.TrimSpace(req.Name)
	}
	if req.Description != "" {
		updates["description"] = req.Description
	}
	if req.ServerID != nil {
		var srv model.Server
		if err := h.db.First(&srv, *req.ServerID).Error; err != nil {
			c.JSON(http.StatusBadRequest, model.Response{Code: 400, Message: "关联服务器不存在"})
			return
		}
		updates["server_id"] = *req.ServerID
	}
	if req.Labels != "" {
		updates["labels"] = req.Labels
	}
	if req.MaxExecutors > 0 {
		updates["max_executors"] = req.MaxExecutors
	}
	if req.WorkspacePath != "" {
		updates["workspace_path"] = req.WorkspacePath
	}
	if req.Enabled != nil {
		updates["enabled"] = *req.Enabled
	}
	if len(updates) == 0 {
		c.JSON(http.StatusOK, model.Response{Code: 200, Data: node})
		return
	}
	if err := h.db.Model(&node).Updates(updates).Error; err != nil {
		c.JSON(http.StatusInternalServerError, model.Response{Code: 500, Message: "更新失败"})
		return
	}
	h.db.First(&node, id)
	c.JSON(http.StatusOK, model.Response{Code: 200, Message: "更新成功", Data: node})
}

// DeleteBuildNode 删除构建节点 // Logan.Li
func (h *PipelineHandler) DeleteBuildNode(c *gin.Context) {
	id, _ := strconv.ParseUint(c.Param("id"), 10, 64)
	var inUse int64
	h.db.Model(&model.Pipeline{}).Where("build_node_id = ?", id).Count(&inUse)
	if inUse > 0 {
		c.JSON(http.StatusBadRequest, model.Response{Code: 400, Message: "仍有流水线绑定此节点，请先解除关联"})
		return
	}
	if err := h.db.Delete(&model.BuildNode{}, id).Error; err != nil {
		c.JSON(http.StatusInternalServerError, model.Response{Code: 500, Message: "删除失败"})
		return
	}
	c.JSON(http.StatusOK, model.Response{Code: 200, Message: "删除成功"})
}

// TestBuildNode 测试构建节点 SSH 连通性 // Logan.Li
func (h *PipelineHandler) TestBuildNode(c *gin.Context) {
	id, _ := strconv.ParseUint(c.Param("id"), 10, 64)
	var node model.BuildNode
	if err := h.db.First(&node, id).Error; err != nil {
		c.JSON(http.StatusNotFound, model.Response{Code: 404, Message: "节点不存在"})
		return
	}
	var srv model.Server
	if err := h.db.First(&srv, node.ServerID).Error; err != nil {
		c.JSON(http.StatusBadRequest, model.Response{Code: 400, Message: "关联服务器不存在"})
		return
	}
	cfg, err := buildSSHConfig(h.db, srv)
	if err != nil {
		c.JSON(http.StatusOK, model.Response{Code: 200, Data: map[string]interface{}{
			"success": false, "message": err.Error(),
		}})
		return
	}
	result, err := remoteexec.Exec(cfg, "echo aiops-node-ok && uname -a", 15*time.Second)
	if err != nil || !result.Success {
		msg := ""
		if result != nil {
			msg = result.Error
			if msg == "" {
				msg = result.Output
			}
		}
		if err != nil {
			msg = err.Error()
		}
		c.JSON(http.StatusOK, model.Response{Code: 200, Data: map[string]interface{}{
			"success": false, "message": msg,
		}})
		return
	}
	c.JSON(http.StatusOK, model.Response{Code: 200, Data: map[string]interface{}{
		"success": true, "message": strings.TrimSpace(result.Output),
	}})
}

// UpdateBuildMaster 更新 Master 内置节点最大并发（1=串行按触发顺序排队） // Logan.Li
func (h *PipelineHandler) UpdateBuildMaster(c *gin.Context) {
	var req model.UpdateBuildMasterRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, model.Response{Code: 400, Message: "参数错误: " + err.Error()})
		return
	}
	cfg := h.setMasterMaxExecutors(req.MaxExecutors)
	nodeMu.Lock()
	running := nodeRunningCount[masterNodeID]
	nodeMu.Unlock()
	c.JSON(http.StatusOK, model.Response{
		Code: 200, Message: "已更新",
		Data: map[string]interface{}{
			"name": "Master", "max_executors": cfg.MaxExecutors, "running_count": running,
		},
	})
}