package server

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

	"github.com/gin-gonic/gin"
	"kra/internal/biz"
	"kra/internal/service"
)

type taskRequest struct {
	ID               uint            `json:"ID"`
	Name             string          `json:"name"`
	Description      string          `json:"description"`
	Spec             string          `json:"spec"`
	WithSeconds      bool            `json:"withSeconds"`
	ExecutorType     string          `json:"executorType"`
	MethodName       string          `json:"methodName"`
	Params           json.RawMessage `json:"params"`
	HTTPURL          string          `json:"httpUrl"`
	HTTPMethod       string          `json:"httpMethod"`
	HTTPHeader       json.RawMessage `json:"httpHeader"`
	HTTPBody         string          `json:"httpBody"`
	HTTPAllowPrivate bool            `json:"httpAllowPrivate"`
	Enabled          bool            `json:"enabled"`
}

func taskDomain(v taskRequest) *biz.TimedTask {
	return &biz.TimedTask{ID: v.ID, Name: v.Name, Description: v.Description, Spec: v.Spec, WithSeconds: v.WithSeconds, ExecutorType: v.ExecutorType, MethodName: v.MethodName, Params: v.Params, HTTPURL: v.HTTPURL, HTTPMethod: v.HTTPMethod, HTTPHeader: v.HTTPHeader, HTTPBody: v.HTTPBody, HTTPAllowPrivate: v.HTTPAllowPrivate, Enabled: v.Enabled}
}
func registerTaskRoutes(group *gin.RouterGroup, svc *service.TaskService, scheduler *TaskScheduler) {
	router := group.Group("/timedTask")
	router.POST("/createTimedTask", func(c *gin.Context) {
		var req taskRequest
		if c.ShouldBindJSON(&req) != nil {
			fail(c, "参数错误")
			return
		}
		task := taskDomain(req)
		if err := svc.Create(c.Request.Context(), task); err != nil {
			fail(c, "创建失败:"+err.Error())
			return
		}
		if err := scheduler.Schedule(task); err != nil {
			fail(c, "调度失败:"+err.Error())
			return
		}
		ok(c)
	})
	router.PUT("/updateTimedTask", func(c *gin.Context) {
		var req taskRequest
		if c.ShouldBindJSON(&req) != nil {
			fail(c, "参数错误")
			return
		}
		task := taskDomain(req)
		if err := svc.Update(c.Request.Context(), task); err != nil {
			fail(c, "更新失败:"+err.Error())
			return
		}
		if err := scheduler.Schedule(task); err != nil {
			fail(c, "调度失败:"+err.Error())
			return
		}
		ok(c)
	})
	router.DELETE("/deleteTimedTask", func(c *gin.Context) {
		id, _ := strconv.ParseUint(c.Query("ID"), 10, 64)
		scheduler.Remove(uint(id))
		if err := svc.Delete(c.Request.Context(), uint(id)); err != nil {
			fail(c, "删除失败")
			return
		}
		ok(c)
	})
	router.POST("/toggleTimedTask", func(c *gin.Context) {
		var req struct {
			ID      uint `json:"ID"`
			Enabled bool `json:"enabled"`
		}
		if c.ShouldBindJSON(&req) != nil {
			fail(c, "参数错误")
			return
		}
		if err := svc.Toggle(c.Request.Context(), req.ID, req.Enabled); err != nil {
			fail(c, "设置失败")
			return
		}
		task, err := svc.Task(c.Request.Context(), req.ID)
		if err != nil {
			fail(c, "任务不存在")
			return
		}
		if err = scheduler.Schedule(task); err != nil {
			fail(c, "调度失败")
			return
		}
		ok(c)
	})
	router.POST("/triggerTimedTask", func(c *gin.Context) {
		var req struct {
			ID uint `json:"ID"`
		}
		if c.ShouldBindJSON(&req) != nil {
			fail(c, "参数错误")
			return
		}
		task, err := svc.Task(c.Request.Context(), req.ID)
		if err != nil {
			fail(c, "任务不存在")
			return
		}
		scheduler.Trigger(task)
		ok(c)
	})
	router.GET("/getTimedTaskList", func(c *gin.Context) {
		page, _ := strconv.Atoi(c.DefaultQuery("page", "1"))
		size, _ := strconv.Atoi(c.DefaultQuery("pageSize", "10"))
		var enabled *bool
		if raw := c.Query("enabled"); raw != "" {
			value, _ := strconv.ParseBool(raw)
			enabled = &value
		}
		items, total, err := svc.Tasks(c.Request.Context(), page, size, &biz.TimedTask{Name: c.Query("name"), ExecutorType: c.Query("executorType"), EnabledFilter: enabled}, scheduler.NextRuns())
		if err != nil {
			fail(c, "获取失败")
			return
		}
		writeResult(c, codeSuccess, pageResult{List: items, Total: total, Page: page, PageSize: size}, "获取成功")
	})
	router.GET("/getTimedTaskLogList", func(c *gin.Context) {
		page, _ := strconv.Atoi(c.DefaultQuery("page", "1"))
		size, _ := strconv.Atoi(c.DefaultQuery("pageSize", "10"))
		taskID, _ := strconv.ParseUint(c.Query("taskId"), 10, 64)
		items, total, err := svc.Logs(c.Request.Context(), page, size, uint(taskID), c.Query("status"))
		if err != nil {
			fail(c, "获取失败")
			return
		}
		writeResult(c, codeSuccess, pageResult{List: items, Total: total, Page: page, PageSize: size}, "获取成功")
	})
	router.GET("/getRegisteredMethods", func(c *gin.Context) {
		writeResult(c, codeSuccess, gin.H{"methods": svc.RegisteredMethods()}, "获取成功")
	})
	router.GET("/alertStream", func(c *gin.Context) {
		c.Header("Content-Type", "text/event-stream")
		c.Header("Cache-Control", "no-cache")
		c.Header("Connection", "keep-alive")
		c.Header("X-Accel-Buffering", "no")
		flusher, okFlush := c.Writer.(http.Flusher)
		if !okFlush {
			fail(c, "SSE 不受支持")
			return
		}
		events := scheduler.Subscribe()
		defer scheduler.Unsubscribe(events)
		ticker := time.NewTicker(20 * time.Second)
		defer ticker.Stop()
		_, _ = fmt.Fprint(c.Writer, "event: connected\ndata: {}\n\n")
		flusher.Flush()
		for {
			select {
			case event, open := <-events:
				if !open {
					return
				}
				_, _ = fmt.Fprintf(c.Writer, "event: alert\ndata: %s\n\n", event)
				flusher.Flush()
			case <-ticker.C:
				_, _ = fmt.Fprint(c.Writer, ": keepalive\n\n")
				flusher.Flush()
			case <-c.Request.Context().Done():
				return
			}
		}
	})
}