package auth

import (
	"allapp/api/types"
	"allapp/config"
	"allapp/db"
	"allapp/db/repo"
	"allapp/utils"
	"allapp/utils/errorx"
	"allapp/utils/httpx"
	"allapp/utils/jwtx"
	"allapp/utils/requestx"
	"allapp/utils/responsex"
	"allapp/utils/uniqueid"
	"errors"
	"fmt"

	"github.com/gofiber/fiber/v3"
	"github.com/gofiber/fiber/v3/client"
)

// LoginQq qq登录
func LoginQq(c fiber.Ctx) error {
	dto := new(types.LoginQqDTO)
	vo := new(types.LoginVO)

	if err := requestx.BindAndValidate(c, dto); err != nil {
		return err
	}

	return handleThirdLogin(
		c,
		dto.Openid,
		dto.Nickname,
		dto.Avatar,
		1, // QQ
		vo,
	)
}

func LoginWechat(c fiber.Ctx) error {
	dto := new(types.LoginWeixinDTO)
	vo := new(types.LoginVO)

	if err := requestx.BindAndValidate(c, dto); err != nil {
		return err
	}

	openid, accessToken, err := getWechatAccess(dto.Code)
	if err != nil {
		return responsex.Error(c, "微信登录失败，请重试")
	}

	// 查是否已存在用户
	_, err = db.Queries.FindUserByOpenID(c.Context(), repo.FindUserByOpenIDParams{
		Openid: openid,
		Type:   0,
	})

	if err == nil {
		return handleThirdLogin(c, openid, "", "", 0, vo)
	}

	if !errorx.IsNotFound(err) {
		return err
	}

	// 新用户 → 拉用户信息
	nickname, avatar, err := getWechatUserInfo(accessToken, openid)
	if err != nil {
		return responsex.Error(c, "微信登录失败，请重试")
	}

	return handleThirdLogin(c, openid, nickname, avatar, 0, vo)
}

func getWechatAccess(code string) (openid string, accessToken string, err error) {
	bodyData, bodyCode, err := httpx.Get(
		"https://api.weixin.qq.com/sns/oauth2/access_token",
		client.Config{
			Param: map[string]string{
				"appid":      config.GetConf().Wechat.AppId,
				"secret":     config.GetConf().Wechat.AppSecret,
				"code":       code,
				"grant_type": "authorization_code",
			},
		},
	)

	if err != nil {
		return "", "", err
	}

	if bodyCode != 200 {
		return "", "", fmt.Errorf("微信Http请求失败: %d", bodyCode)
	}

	accessMap, err := utils.JSONStringToMap(bodyData)
	if err != nil {
		return "", "", err
	}

	accessToken, _ = accessMap["access_token"].(string)
	openid, _ = accessMap["openid"].(string)

	if accessToken == "" || openid == "" {
		return "", "", errors.New("获取微信登录凭证失败")
	}

	return
}

func getWechatUserInfo(accessToken, openid string) (nickname, avatar string, err error) {
	bodyData, bodyCode, err := httpx.Get(
		"https://api.weixin.qq.com/sns/userinfo",
		client.Config{
			Param: map[string]string{
				"access_token": accessToken,
				"openid":       openid,
			},
		},
	)

	if err != nil {
		return "", "", err
	}

	if bodyCode != 200 {
		return "", "", fmt.Errorf("微信Http请求失败")
	}

	userMap, err := utils.JSONStringToMap(bodyData)
	if err != nil {
		return "", "", err
	}

	nickname, _ = userMap["nickname"].(string)
	avatar, _ = userMap["headimgurl"].(string)

	return
}

func handleThirdLogin(
	c fiber.Ctx,
	openid string,
	nickname string,
	avatar string,
	loginType int32, // 0=微信 1=QQ
	vo *types.LoginVO,
) error {
	user, err := db.Queries.FindUserByOpenID(c.Context(), repo.FindUserByOpenIDParams{
		Openid: openid,
		Type:   loginType,
	})

	if err != nil {
		if errorx.IsNotFound(err) {
			// 用户不存在 → 注册
			return registerUser(c, openid, nickname, avatar, loginType, vo)
		}
		return err
	}

	// 用户存在
	if user.Status == 0 {
		return responsex.Error(c, "账号已被禁用")
	}

	_ = db.Queries.UpdateUserLastLoginTime(c.Context(), user.UserID)

	token, err := jwtx.CreateToken(c, user.UserID)
	if err != nil {
		return err
	}

	vo.Token = token
	vo.UserId = user.UserID
	vo.Nickname = user.Nickname
	vo.Avatar = user.Avatar

	return responsex.OK(c, vo)
}

// 注册用户
func registerUser(c fiber.Ctx, openid, nickname, avatar string, loginType int32, vo *types.LoginVO) error {
	userId := uniqueid.NextId()

	if nickname == "" {
		nickname = fmt.Sprintf("用户_%d", userId)
	}
	if avatar == "" {
		avatar = "https://default-avatar-url.com/default.png"
	}

	err := db.WithTx(c.Context(), func(q *repo.Queries) error {
		// 插入用户
		if err := q.InsertUser(c.Context(), repo.InsertUserParams{
			ID:       userId,
			Nickname: nickname,
			Avatar:   avatar,
			Status:   1,
		}); err != nil {
			return err
		}

		// 插入第三方登录信息
		if err := q.InsertUserOAuth(c.Context(), repo.InsertUserOAuthParams{
			ID:     uniqueid.NextId(),
			UserID: userId,
			Type:   loginType,
			Openid: openid,
		}); err != nil {
			return err
		}

		return nil
	})

	if err != nil {
		return err
	}

	token, _ := jwtx.CreateToken(c, userId)

	vo.Token = token
	vo.UserId = userId
	vo.Nickname = nickname
	vo.Avatar = avatar

	return responsex.OK(c, vo)
}