package handler

import (
	"ckwk/internal/ckwk"
	"ckwk/internal/dto"
	"ckwk/pkg/log"
	"errors"
	"fmt"
	"net/http"

	"github.com/gin-gonic/gin"
	"go.uber.org/zap"
)

type WKHandler struct {
	Session *ckwk.SessionManager
}

func NewWKHandler() *WKHandler {
	return &WKHandler{
		Session: ckwk.NewSessionManager(),
	}
}

// getWKFromContext 从 gin.Context 中提取 wk_instance，不存在时自动返回错误响应
func getWKFromContext(ctx *gin.Context) (*ckwk.WK, bool) {
	val, ok := ctx.Get("wk_instance")
	if !ok {
		ctx.JSON(200, dto.Error(-1, "登录已过期"))
		return nil, false
	}
	return val.(*ckwk.WK), true
}

func (h *WKHandler) Login(ctx *gin.Context) {
	var req dto.LoginReq
	if err := ctx.ShouldBindJSON(&req); err != nil {
		ctx.JSON(200, dto.Error(-1, "请求参数错误"))
		return
	}
	log.Debug("请求数据", zap.Any("req", req))
	var cookies []*http.Cookie
	if req.Token != "" {
		cookies = []*http.Cookie{
			{
				Name:  "token",
				Value: req.Token,
				Path:  "/"},
		}
	} else {
		cookies = []*http.Cookie{}
	}
	wk := ckwk.NewWK(req.Username, req.Password, req.Host, cookies)
	if wk == nil {
		ctx.JSON(200, dto.Error(-1, "登录失败：请提供账号密码或有效的 Token，并确保 Host 正确"))
		return
	}
	if req.Token == "" {
		ok, err := wk.Login()
		if err != nil {
			ctx.JSON(200, dto.Error(-1, err.Error()))
			return
		}
		if !ok {
			ctx.JSON(200, dto.Error(-1, "登录失败"))
			return
		}
	}

	sessionID := h.Session.Store(wk)

	ctx.JSON(200, dto.Success(map[string]any{
		"session_id": sessionID,
	}))
}

func (h *WKHandler) Online(ctx *gin.Context) {
	wk, ok := getWKFromContext(ctx)
	if !ok {
		return
	}

	flag, err := wk.Online()
	if err != nil {
		if errors.Is(err, ckwk.ErrSessionRemoved) {
			ctx.JSON(http.StatusUnauthorized, dto.Error(401, err.Error()))
			return
		}
		ctx.JSON(200, dto.Error(-1, err.Error()))
		return
	}

	if !flag {
		ctx.JSON(200, dto.Error(-1, "保持账号状态失败"))
		return
	}
	ctx.JSON(200, dto.Ok())
}

func (h *WKHandler) Logout(ctx *gin.Context) {
	sessionID := ctx.GetString("session_id")
	h.Session.Del(sessionID)
	ctx.JSON(200, dto.Ok())
}

func (h *WKHandler) UserInfo(ctx *gin.Context) {
	wk, ok := getWKFromContext(ctx)
	if !ok {
		return
	}

	userinfo, err := wk.UserInfoGet()
	if err != nil {
		ctx.JSON(200, dto.Error(-1, err.Error()))
		return
	}

	ctx.JSON(200, dto.Success(map[string]any{
		"user": userinfo,
	}))
}

func (h *WKHandler) Course(ctx *gin.Context) {
	var req dto.CourseReq
	if err := ctx.ShouldBindJSON(&req); err != nil {
		ctx.JSON(200, dto.Error(-1, "请求参数错误"))
		return
	}

	wk, ok := getWKFromContext(ctx)
	if !ok {
		return
	}

	courses, err := wk.CourseGet(req.Status)
	if err != nil {
		ctx.JSON(200, dto.Error(-1, err.Error()))
		return
	}

	ctx.JSON(200, dto.Success(map[string]any{
		"courses": courses,
	}))
}

func (h *WKHandler) Study(ctx *gin.Context) {
	wk, ok := getWKFromContext(ctx)
	if !ok {
		return
	}

	var req dto.StudyReq
	if err := ctx.ShouldBindJSON(&req); err != nil {
		ctx.JSON(200, dto.Error(-1, "请求参数错误"))
		return
	}

	result, err := wk.Study(req.NodeID, req.StudyID, req.StudyTime, req.Status)
	if err != nil {
		if errors.Is(err, ckwk.ErrSessionRemoved) {
			ctx.JSON(http.StatusUnauthorized, dto.Error(401, err.Error()))
			return
		}
		ctx.JSON(200, dto.Error(-1, err.Error()))
		return
	}

	ctx.JSON(200, dto.Success(result))
}

func (h *WKHandler) AllRecord(ctx *gin.Context) {
	wk, ok := getWKFromContext(ctx)
	if !ok {
		return
	}

	var req dto.AllRecordReq
	if err := ctx.ShouldBindJSON(&req); err != nil {
		ctx.JSON(200, dto.Error(-1, "请求参数错误"))
		return
	}
	if req.Page < 1 {
		req.Page = 1
	}
	var list any
	var pageInfo ckwk.PageInfo
	var err error

	// 根据类型调用不同的泛型方法
	switch req.RecordType {
	case ckwk.RecordStudy:
		res, e := wk.GetStudyList(req.CourseID, fmt.Sprint(req.Page))
		err = e
		if e == nil {
			list, pageInfo = res.List, res.PageInfo
		}
	case ckwk.RecordWork:
		res, e := wk.GetWorkList(req.CourseID, fmt.Sprint(req.Page))
		err = e
		if e == nil {
			list, pageInfo = res.List, res.PageInfo
		}
	case ckwk.RecordExam:
		res, e := wk.GetExamList(req.CourseID, fmt.Sprint(req.Page))
		err = e
		if e == nil {
			list, pageInfo = res.List, res.PageInfo
		}
	case ckwk.RecordDiscuss:
		res, e := wk.GetDiscussList(req.CourseID, fmt.Sprint(req.Page))
		err = e
		if e == nil {
			list, pageInfo = res.List, res.PageInfo
		}
	default:
		ctx.JSON(200, dto.Error(-1, "不支持的记录类型"))
		return
	}
	if err != nil {
		ctx.JSON(200, dto.Error(-1, err.Error()))
		return
	}

	ctx.JSON(200, dto.Success(map[string]any{
		"list": list,
		"page_info": map[string]any{
			"page":     pageInfo.Page,
			"pageSize": pageInfo.PageSize,
		},
	}))
}

func (h *WKHandler) Host(ctx *gin.Context) {
	ctx.JSON(200, dto.Success(map[string]any{
		"list": []map[string]any{
			{"host": "cqcst.leykeji.com", "name": "劳动课程测评考试平台"},
			{"host": "cqcst.zjxkeji.com", "name": "公益课程平台"},
			{"host": "cqcst.suwankj.com", "name": "在线课程测评考试平台"},
			{"host": "cqcst.yuruixxkj.com", "name": "在线测评考试平台"},
			// {"host": "cqcst.yuncanjykeji.com", "name": "劳动课程测评考试平台"},
			// {"host": "cqcst.yuruixxkj.com", "name": "公益课程平台"},
		},
	}))
}