package controller

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

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

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

// ListCronJobs 获取定时任务列表
// @Summary 获取定时任务列表
// @Description 获取所有定时任务列表
// @Tags 自动化运维
// @Produce json
// @Security Bearer
// @Param page query int false "页码"
// @Param page_size query int false "每页数量"
// @Success 200 {object} model.Response{data=model.ListResponse}
// @Router /cron-jobs [get]
func (h *AutomationHandler) ListCronJobs(c *gin.Context) {
	var query model.PageQuery
	c.ShouldBindQuery(&query)

	var total int64
	h.db.Model(&model.CronJob{}).Count(&total)

	var jobs []model.CronJob
	h.db.Preload("Script").Offset(query.GetOffset()).Limit(query.GetLimit()).Find(&jobs)

	c.JSON(http.StatusOK, model.Response{
		Code:    200,
		Message: "success",
		Data: model.ListResponse{
			List:  jobs,
			Total: total,
		},
	})
}

// GetCronJob 获取定时任务详情
// @Summary 获取定时任务详情
// @Description 获取指定定时任务的详细信息
// @Tags 自动化运维
// @Produce json
// @Security Bearer
// @Param id path int true "任务ID"
// @Success 200 {object} model.Response{data=model.CronJob}
// @Router /cron-jobs/{id} [get]
func (h *AutomationHandler) GetCronJob(c *gin.Context) {
	id, _ := strconv.Atoi(c.Param("id"))

	var job model.CronJob
	if err := h.db.Preload("Script").First(&job, id).Error; err != nil {
		c.JSON(http.StatusNotFound, model.Response{
			Code:    404,
			Message: "定时任务不存在",
		})
		return
	}

	c.JSON(http.StatusOK, model.Response{
		Code:    200,
		Message: "success",
		Data:    job,
	})
}

// CreateCronJob 创建定时任务
// @Summary 创建定时任务
// @Description 创建新定时任务
// @Tags 自动化运维
// @Accept json
// @Produce json
// @Security Bearer
// @Param request body model.CreateCronJobRequest true "创建请求"
// @Success 200 {object} model.Response{data=model.CronJob}
// @Router /cron-jobs [post]
func (h *AutomationHandler) CreateCronJob(c *gin.Context) {
	var req model.CreateCronJobRequest
	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
	}

	job := model.CronJob{
		Name:        req.Name,
		Description: req.Description,
		CronExpr:    req.CronExpr,
		Type:        req.Type,
		Content:     req.Content,
		ScriptID:    req.ScriptID,
		TargetType:  req.TargetType,
		Timeout:     req.Timeout,
		NotifyOn:    req.NotifyOn,
		Enabled:     true,
	}

	if job.Timeout == 0 {
		job.Timeout = 300
	}
	if job.NotifyOn == "" {
		job.NotifyOn = "failure"
	}

	if err := h.db.Create(&job).Error; err != nil {
		c.JSON(http.StatusInternalServerError, model.Response{
			Code:    500,
			Message: "创建失败",
		})
		return
	}

	c.JSON(http.StatusOK, model.Response{
		Code:    200,
		Message: "创建成功",
		Data:    job,
	})
}

// UpdateCronJob 更新定时任务
// @Summary 更新定时任务
// @Description 更新指定定时任务
// @Tags 自动化运维
// @Accept json
// @Produce json
// @Security Bearer
// @Param id path int true "任务ID"
// @Param request body model.CreateCronJobRequest true "更新请求"
// @Success 200 {object} model.Response{data=model.CronJob}
// @Router /cron-jobs/{id} [put]
func (h *AutomationHandler) UpdateCronJob(c *gin.Context) {
	id, _ := strconv.Atoi(c.Param("id"))

	var req model.CreateCronJobRequest
	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
	}

	var job model.CronJob
	if err := h.db.First(&job, id).Error; err != nil {
		c.JSON(http.StatusNotFound, model.Response{
			Code:    404,
			Message: "定时任务不存在",
		})
		return
	}

	updates := map[string]interface{}{
		"name":        req.Name,
		"description": req.Description,
		"cron_expr":   req.CronExpr,
		"type":        req.Type,
		"content":     req.Content,
		"script_id":   req.ScriptID,
		"target_type": req.TargetType,
		"timeout":     req.Timeout,
		"notify_on":   req.NotifyOn,
	}

	if err := h.db.Model(&job).Updates(updates).Error; err != nil {
		c.JSON(http.StatusInternalServerError, model.Response{
			Code:    500,
			Message: "更新失败",
		})
		return
	}

	h.db.Preload("Script").First(&job, id)

	c.JSON(http.StatusOK, model.Response{
		Code:    200,
		Message: "更新成功",
		Data:    job,
	})
}

// DeleteCronJob 删除定时任务
// @Summary 删除定时任务
// @Description 删除指定定时任务
// @Tags 自动化运维
// @Produce json
// @Security Bearer
// @Param id path int true "任务ID"
// @Success 200 {object} model.Response
// @Router /cron-jobs/{id} [delete]
func (h *AutomationHandler) DeleteCronJob(c *gin.Context) {
	id, _ := strconv.Atoi(c.Param("id"))

	if err := h.db.Delete(&model.CronJob{}, 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",
	})
}

// BatchDeleteCronJobs 批量删除定时任务
// @Summary 批量删除定时任务
// @Description 批量删除定时任务
// @Tags 自动化运维
// @Accept json
// @Produce json
// @Security Bearer
// @Param request body model.IDsRequest true "删除请求"
// @Success 200 {object} model.Response
// @Router /cron-jobs/batch-delete [delete]
func (h *AutomationHandler) BatchDeleteCronJobs(c *gin.Context) {
	var req model.IDsRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, model.Response{
			Code:    400,
			Message: "请求参数错误",
		})
		return
	}

	if err := h.db.Delete(&model.CronJob{}, req.IDs).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",
	})
}

// ToggleCronJob 切换定时任务状态
// @Summary 切换定时任务状态
// @Description 启用或禁用定时任务
// @Tags 自动化运维
// @Produce json
// @Security Bearer
// @Param id path int true "任务ID"
// @Success 200 {object} model.Response{data=model.CronJob}
// @Router /cron-jobs/{id}/toggle [post]
func (h *AutomationHandler) ToggleCronJob(c *gin.Context) {
	id, _ := strconv.Atoi(c.Param("id"))

	var job model.CronJob
	if err := h.db.First(&job, id).Error; err != nil {
		c.JSON(http.StatusNotFound, model.Response{
			Code:    404,
			Message: "定时任务不存在",
		})
		return
	}

	job.Enabled = !job.Enabled
	if err := h.db.Save(&job).Error; err != nil {
		c.JSON(http.StatusInternalServerError, model.Response{
			Code:    500,
			Message: "操作失败",
		})
		return
	}

	c.JSON(http.StatusOK, model.Response{
		Code:    200,
		Message: "操作成功",
		Data:    job,
	})
}

// ExecuteCronJob 执行定时任务
// @Summary 执行定时任务
// @Description 手动执行定时任务
// @Tags 自动化运维
// @Produce json
// @Security Bearer
// @Param id path int true "任务ID"
// @Success 200 {object} model.Response{data=model.TaskExecution}
// @Router /cron-jobs/{id}/execute [post]
func (h *AutomationHandler) ExecuteCronJob(c *gin.Context) {
	id, _ := strconv.Atoi(c.Param("id"))

	var job model.CronJob
	if err := h.db.First(&job, id).Error; err != nil {
		c.JSON(http.StatusNotFound, model.Response{
			Code:    404,
			Message: "定时任务不存在",
		})
		return
	}

	// Resolve the content to execute. For type=script, load the linked Script.
	content := job.Content
	scriptType := job.Type // shell | python | command | script
	if scriptType == "command" {
		scriptType = "shell" // one-liner commands run via bash
	}
	if job.Type == "script" && job.ScriptID != nil {
		var script model.Script
		if err := h.db.First(&script, *job.ScriptID).Error; err == nil {
			content = script.Content
			scriptType = script.Type
			h.db.Model(&script).UpdateColumn("run_count", script.RunCount+1)
		}
	}

	now := time.Now()
	execution := model.TaskExecution{
		TaskType:   "cron",
		TaskID:     uint(id),
		TaskName:   job.Name,
		Status:     "running",
		TargetType: job.TargetType,
		Targets:    job.Targets,
		StartedAt:  &now,
	}
	if err := h.db.Create(&execution).Error; err != nil {
		c.JSON(http.StatusInternalServerError, model.Response{
			Code:    500,
			Message: "创建执行记录失败",
		})
		return
	}

	var output string
	var exitCode int
	var duration int
	status := "success"

	// 根据 TargetType 决定执行方式 // Logan.Li
	if job.TargetType != "" && job.TargetType != "local" && job.Targets != "" {
		// 远程目标执行 — 通过 SSH 并发执行
		remoteResults, remoteErr := ExecuteCronOnTargets(h.db, job, scriptType, content, job.Timeout)
		duration = int(time.Since(now).Milliseconds())

		if remoteErr != nil {
			output = fmt.Sprintf("远程执行调度失败: %v", remoteErr)
			exitCode = -1
			status = "failed"
		} else {
			// 格式化远程执行结果
			output = remoteexec.FormatExecResults(remoteResults)
			// 任意一台失败则整体标记为 failed
			for _, r := range remoteResults {
				if !r.Success {
					status = "failed"
					exitCode = -1
					break
				}
			}
		}
	} else {
		// 本地执行
		output, exitCode, duration = runLocal(scriptType, content, job.Timeout)
		if exitCode != 0 {
			status = "failed"
		}
	}

	finishedAt := time.Now()

	h.db.Model(&execution).Updates(map[string]interface{}{
		"status":      status,
		"output":      output,
		"duration":    duration,
		"finished_at": finishedAt,
	})

	// Update cron job statistics.
	statsUpdates := map[string]interface{}{
		"last_run_at": now,
		"last_status": status,
		"run_count":   job.RunCount + 1,
	}
	if status == "success" {
		statsUpdates["success_count"] = job.SuccessCount + 1
	} else {
		statsUpdates["fail_count"] = job.FailCount + 1
	}
	h.db.Model(&job).Updates(statsUpdates)

	execution.Output = output
	execution.Status = status
	execution.Duration = duration
	execution.FinishedAt = &finishedAt

	msg := "执行成功"
	if status == "failed" {
		msg = "执行失败"
	}
	c.JSON(http.StatusOK, model.Response{
		Code:    200,
		Message: msg,
		Data:    execution,
	})
}