package server

import (
	"encoding/json"
	"strconv"
	"time"

	"kra/internal/service"

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

type announcementRequest struct {
	ID          uint            `json:"ID"`
	Title       string          `json:"title"`
	Content     string          `json:"content"`
	UserID      *uint           `json:"userID"`
	Attachments json.RawMessage `json:"attachments"`
}

func announcementInput(req announcementRequest) service.AnnouncementInput {
	return service.AnnouncementInput{ID: req.ID, Title: req.Title, Content: req.Content, UserID: req.UserID, Attachments: req.Attachments}
}

func registerAnnouncementRoutes(private, public *gin.RouterGroup, svc *service.AnnouncementService) {
	privateInfo := private.Group("/info")
	privateInfo.POST("/createInfo", func(c *gin.Context) {
		var req announcementRequest
		if c.ShouldBindJSON(&req) != nil {
			fail(c, "参数错误")
			return
		}
		if err := svc.Create(c.Request.Context(), announcementInput(req)); err != nil {
			fail(c, "创建失败:"+err.Error())
			return
		}
		writeResult(c, codeSuccess, gin.H{}, "创建成功")
	})
	privateInfo.DELETE("/deleteInfo", func(c *gin.Context) {
		id, _ := strconv.ParseUint(c.Query("ID"), 10, 64)
		if err := svc.Delete(c.Request.Context(), uint(id)); err != nil {
			fail(c, "删除失败:"+err.Error())
			return
		}
		writeResult(c, codeSuccess, gin.H{}, "删除成功")
	})
	privateInfo.DELETE("/deleteInfoByIds", func(c *gin.Context) {
		values := c.QueryArray("IDs[]")
		if len(values) == 0 {
			values = c.QueryArray("IDs")
		}
		ids := make([]uint, 0, len(values))
		for _, value := range values {
			id, err := strconv.ParseUint(value, 10, 64)
			if err != nil || id == 0 {
				fail(c, "参数错误")
				return
			}
			ids = append(ids, uint(id))
		}
		if err := svc.DeleteByIDs(c.Request.Context(), ids); err != nil {
			fail(c, "批量删除失败:"+err.Error())
			return
		}
		writeResult(c, codeSuccess, gin.H{}, "批量删除成功")
	})
	privateInfo.PUT("/updateInfo", func(c *gin.Context) {
		var req announcementRequest
		if c.ShouldBindJSON(&req) != nil {
			fail(c, "参数错误")
			return
		}
		if err := svc.Update(c.Request.Context(), announcementInput(req)); err != nil {
			fail(c, "更新失败:"+err.Error())
			return
		}
		writeResult(c, codeSuccess, gin.H{}, "更新成功")
	})
	privateInfo.GET("/findInfo", func(c *gin.Context) {
		id, _ := strconv.ParseUint(c.Query("ID"), 10, 64)
		item, err := svc.Find(c.Request.Context(), uint(id))
		if err != nil {
			fail(c, "查询失败:"+err.Error())
			return
		}
		okWithData(c, item)
	})
	privateInfo.GET("/getInfoList", func(c *gin.Context) {
		page, _ := strconv.Atoi(c.DefaultQuery("page", "1"))
		pageSize, _ := strconv.Atoi(c.DefaultQuery("pageSize", "10"))
		start, startErr := parseAnnouncementTime(c.Query("startCreatedAt"))
		end, endErr := parseAnnouncementTime(c.Query("endCreatedAt"))
		if startErr != nil || endErr != nil || (start == nil) != (end == nil) {
			fail(c, "创建日期范围不合法")
			return
		}
		items, total, err := svc.List(c.Request.Context(), page, pageSize, start, end)
		if err != nil {
			fail(c, "获取失败:"+err.Error())
			return
		}
		writeResult(c, codeSuccess, pageResult{List: items, Total: total, Page: page, PageSize: pageSize}, "获取成功")
	})
	publicInfo := public.Group("/info")
	publicInfo.GET("/getInfoDataSource", func(c *gin.Context) {
		users, err := svc.UserOptions(c.Request.Context())
		if err != nil {
			fail(c, "查询失败:"+err.Error())
			return
		}
		okWithData(c, gin.H{"userID": users})
	})
	publicInfo.GET("/getInfoPublic", func(c *gin.Context) {
		writeResult(c, codeSuccess, gin.H{"info": "不需要鉴权的公告接口信息"}, "获取成功")
	})
}

func parseAnnouncementTime(value string) (*time.Time, error) {
	if value == "" {
		return nil, nil
	}
	parsed, err := time.Parse(time.RFC3339, value)
	if err != nil {
		return nil, err
	}
	return &parsed, nil
}