package controller

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

	"ezops/middleware"
	"ezops/model"
	"ezops/pkg/scriptrunner"

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

// GetScriptRuntime 获取本机脚本运行时能力（Shell/Python/PowerShell） // Logan.Li
func (h *AutomationHandler) GetScriptRuntime(c *gin.Context) {
	rt := scriptrunner.DetectRuntime()
	c.JSON(http.StatusOK, model.Response{
		Code:    200,
		Message: "success",
		Data:    rt,
	})
}

// ListScripts 获取脚本列表
// @Summary 获取脚本列表
// @Description 获取所有脚本列表
// @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 /scripts [get]
func (h *AutomationHandler) ListScripts(c *gin.Context) {
	var query model.PageQuery
	c.ShouldBindQuery(&query)

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

	var scripts []model.Script
	h.db.Offset(query.GetOffset()).Limit(query.GetLimit()).Find(&scripts)

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

// GetScript 获取脚本详情
// @Summary 获取脚本详情
// @Description 获取指定脚本的详细信息
// @Tags 自动化运维
// @Produce json
// @Security Bearer
// @Param id path int true "脚本ID"
// @Success 200 {object} model.Response{data=model.Script}
// @Router /scripts/{id} [get]
func (h *AutomationHandler) GetScript(c *gin.Context) {
	id, _ := strconv.Atoi(c.Param("id"))

	var script model.Script
	if err := h.db.First(&script, id).Error; err != nil {
		c.JSON(http.StatusNotFound, model.Response{
			Code:    404,
			Message: "脚本不存在",
		})
		return
	}

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

// CreateScript 创建脚本
// @Summary 创建脚本
// @Description 创建新脚本
// @Tags 自动化运维
// @Accept json
// @Produce json
// @Security Bearer
// @Param request body model.CreateScriptRequest true "创建请求"
// @Success 200 {object} model.Response{data=model.Script}
// @Router /scripts [post]
func (h *AutomationHandler) CreateScript(c *gin.Context) {
	var req model.CreateScriptRequest
	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
	}

	script := model.Script{
		Name:        req.Name,
		Code:        req.Code,
		Description: req.Description,
		Type:        req.Type,
		Content:     req.Content,
		Params:      req.Params,
		Timeout:     req.Timeout,
	}

	if script.Type == "" {
		script.Type = "shell"
	}
	if script.Timeout == 0 {
		script.Timeout = 300
	}
	if script.Code == "" {
		script.Code = randomCode("sc")
	}
	script.CreatedBy = middleware.GetUserID(c)

	if err := h.db.Create(&script).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:    script,
	})
}

// UpdateScript 更新脚本
// @Summary 更新脚本
// @Description 更新指定脚本
// @Tags 自动化运维
// @Accept json
// @Produce json
// @Security Bearer
// @Param id path int true "脚本ID"
// @Param request body model.CreateScriptRequest true "更新请求"
// @Success 200 {object} model.Response{data=model.Script}
// @Router /scripts/{id} [put]
func (h *AutomationHandler) UpdateScript(c *gin.Context) {
	id, _ := strconv.Atoi(c.Param("id"))

	var req model.CreateScriptRequest
	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 script model.Script
	if err := h.db.First(&script, id).Error; err != nil {
		c.JSON(http.StatusNotFound, model.Response{
			Code:    404,
			Message: "脚本不存在",
		})
		return
	}

	updates := map[string]interface{}{
		"name":        req.Name,
		"description": req.Description,
		"type":        req.Type,
		"content":     req.Content,
		"params":      req.Params,
		"timeout":     req.Timeout,
		"version":     script.Version + 1,
	}

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

	h.db.First(&script, id)

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

// DeleteScript 删除脚本
// @Summary 删除脚本
// @Description 删除指定脚本
// @Tags 自动化运维
// @Produce json
// @Security Bearer
// @Param id path int true "脚本ID"
// @Success 200 {object} model.Response
// @Router /scripts/{id} [delete]
func (h *AutomationHandler) DeleteScript(c *gin.Context) {
	id, _ := strconv.Atoi(c.Param("id"))

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

// BatchDeleteScripts 批量删除脚本
// @Summary 批量删除脚本
// @Description 批量删除脚本
// @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 /scripts/batch-delete [post]
func (h *AutomationHandler) BatchDeleteScripts(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.Script{}, 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",
	})
}

// ExecuteScript 执行脚本
// @Summary 执行脚本
// @Description 在目标服务器上执行脚本
// @Tags 自动化运维
// @Accept json
// @Produce json
// @Security Bearer
// @Param id path int true "脚本ID"
// @Param request body model.ExecuteScriptRequest true "执行请求"
// @Success 200 {object} model.Response{data=model.TaskExecution}
// @Router /scripts/{id}/execute [post]
func (h *AutomationHandler) ExecuteScript(c *gin.Context) {
	id, _ := strconv.Atoi(c.Param("id"))

	var script model.Script
	if err := h.db.First(&script, id).Error; err != nil {
		c.JSON(http.StatusNotFound, model.Response{
			Code:    404,
			Message: "脚本不存在",
		})
		return
	}

	// The request body is optional — when omitted we execute locally.
	var req model.ExecuteScriptRequest
	_ = c.ShouldBindJSON(&req)

	now := time.Now()
	execution := model.TaskExecution{
		TaskType:   "script",
		TaskID:     uint(id),
		TaskName:   script.Name,
		Status:     "running",
		TargetType: req.TargetType,
		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
	}

	rt := scriptrunner.DetectRuntime()
	if ok, reason := scriptrunner.CanRun(rt, script.Type); !ok {
		c.JSON(http.StatusBadRequest, model.Response{
			Code:    400,
			Message: reason,
		})
		return
	}

	// 在 AIOps 本机执行（embed 单二进制 / Docker 容器内）
	output, exitCode, duration := runLocal(script.Type, script.Content, script.Timeout)
	finishedAt := time.Now()
	status := "success"
	if exitCode != 0 {
		status = "failed"
	}

	h.db.Model(&execution).Updates(map[string]interface{}{
		"status":      status,
		"output":      output,
		"duration":    duration,
		"finished_at": finishedAt,
	})
	h.db.Model(&script).UpdateColumn("run_count", script.RunCount+1)

	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,
	})
}

// ListExecutions 获取任务执行记录列表
// @Summary 获取任务执行记录
// @Description 获取脚本/定时任务的执行历史记录（支持 task_type / task_id 筛选）
// @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"
// @Param task_type query string false "任务类型 (cron/script)"
// @Param task_id query string false "任务ID"
// @Success 200 {object} model.Response{data=model.ListResponse}
// @Router /task-executions [get]
func (h *AutomationHandler) ListExecutions(c *gin.Context) {
	var query model.PageQuery
	c.ShouldBindQuery(&query)

	db := h.db.Model(&model.TaskExecution{})
	if taskType := c.Query("task_type"); taskType != "" {
		db = db.Where("task_type = ?", taskType)
	}
	if taskID := c.Query("task_id"); taskID != "" {
		db = db.Where("task_id = ?", taskID)
	}

	var total int64
	db.Count(&total)

	var execs []model.TaskExecution
	db.Order("created_at DESC").Offset(query.GetOffset()).Limit(query.GetLimit()).Find(&execs)

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