package user

import (
	"context"
	"time"

	"ycc-server/app/main/api/internal/svc"
	"ycc-server/app/main/api/internal/types"
	"ycc-server/app/main/model"
	"ycc-server/common/xerr"

	"github.com/google/uuid"
	"github.com/pkg/errors"
)

type AuthLogic struct {
	ctx    context.Context
	svcCtx *svc.ServiceContext
}

func NewAuthLogic(ctx context.Context, svcCtx *svc.ServiceContext) *AuthLogic {
	return &AuthLogic{ctx: ctx, svcCtx: svcCtx}
}

func (l *AuthLogic) Auth(req *types.AuthReq) (*types.AuthResp, error) {
    var userID string
	var userType int64
	var authType string
	var authKey string

	switch req.Platform {
	case model.PlatformH5:
		authType = model.UserAuthTypeUUID
		authKey = uuid.NewString()
		user, err := l.findOrCreateUserByAuth(authType, authKey)
		if err != nil {
			return nil, err
		}
		userID = user.Id
		userType = l.getUserType(user)
	case model.PlatformWxH5:
		openid, err := l.svcCtx.VerificationService.GetWechatH5OpenID(l.ctx, req.Code)
		if err != nil {
			return nil, errors.Wrapf(xerr.NewErrCode(xerr.SERVER_COMMON_ERROR), "获取WxH5 OpenID失败: %v", err)
		}
		authType = model.UserAuthTypeWxh5OpenID
		authKey = openid
		userAuth, err := l.svcCtx.UserAuthModel.FindOneByAuthTypeAuthKey(l.ctx, authType, authKey)
		if err != nil && !errors.Is(err, model.ErrNotFound) {
			return nil, errors.Wrapf(xerr.NewErrCode(xerr.DB_ERROR), "查询用户授权失败: %v", err)
		}
		if userAuth != nil {
			user, _ := l.svcCtx.UserModel.FindOne(l.ctx, userAuth.UserId)
			userID = user.Id
			userType = l.getUserType(user)
		} else {
			user, err := l.createUserWithAuth(authType, authKey)
			if err != nil {
				return nil, err
			}
			userID = user.Id
			userType = model.UserTypeTemp
		}
	case model.PlatformWxMini:
		openid, err := l.svcCtx.VerificationService.GetWechatMiniOpenID(l.ctx, req.Code)
		if err != nil {
			return nil, errors.Wrapf(xerr.NewErrCode(xerr.SERVER_COMMON_ERROR), "获取WxMini OpenID失败: %v", err)
		}
		authType = model.UserAuthTypeWxMiniOpenID
		authKey = openid
		userAuth, err := l.svcCtx.UserAuthModel.FindOneByAuthTypeAuthKey(l.ctx, authType, authKey)
		if err != nil && !errors.Is(err, model.ErrNotFound) {
			return nil, errors.Wrapf(xerr.NewErrCode(xerr.DB_ERROR), "查询用户授权失败: %v", err)
		}
		if userAuth != nil {
			user, _ := l.svcCtx.UserModel.FindOne(l.ctx, userAuth.UserId)
			userID = user.Id
			userType = l.getUserType(user)
		} else {
			user, err := l.createUserWithAuth(authType, authKey)
			if err != nil {
				return nil, err
			}
			userID = user.Id
			userType = model.UserTypeTemp
		}
	default:
		return nil, errors.Wrapf(xerr.NewErrMsg("不支持的平台类型"), "platform=%s", req.Platform)
	}

	token, err := l.svcCtx.UserService.GeneralUserToken(l.ctx, userID, userType)
	if err != nil {
		return nil, errors.Wrapf(xerr.NewErrCode(xerr.SERVER_COMMON_ERROR), "生成Token失败: %v", err)
	}
	now := time.Now().Unix()
	user, _ := l.svcCtx.UserModel.FindOne(l.ctx, userID)
	hasMobile := user.Mobile.Valid
	isAgent := false
	if hasMobile {
		agent, _ := l.svcCtx.AgentModel.FindOneByUserId(l.ctx, userID)
		isAgent = agent != nil
	}
	return &types.AuthResp{
		AccessToken:  token,
		AccessExpire: now + l.svcCtx.Config.JwtAuth.AccessExpire,
		RefreshAfter: now + l.svcCtx.Config.JwtAuth.RefreshAfter,
		UserType:     userType,
		HasMobile:    hasMobile,
		IsAgent:      isAgent,
	}, nil
}

func (l *AuthLogic) findOrCreateUserByAuth(authType, authKey string) (*model.User, error) {
	userAuth, err := l.svcCtx.UserAuthModel.FindOneByAuthTypeAuthKey(l.ctx, authType, authKey)
	if err != nil && !errors.Is(err, model.ErrNotFound) {
		return nil, errors.Wrapf(xerr.NewErrCode(xerr.DB_ERROR), "查找用户授权失败: %v", err)
	}
	if userAuth != nil {
		user, err := l.svcCtx.UserModel.FindOne(l.ctx, userAuth.UserId)
		return user, err
	}
	return l.createUserWithAuth(authType, authKey)
}

func (l *AuthLogic) createUserWithAuth(authType, authKey string) (*model.User, error) {
	user := &model.User{Id: uuid.NewString()}
	_, err := l.svcCtx.UserModel.Insert(l.ctx, nil, user)
	if err != nil {
		return nil, err
	}
	ua := &model.UserAuth{Id: uuid.NewString(), UserId: user.Id, AuthType: authType, AuthKey: authKey}
	_, err = l.svcCtx.UserAuthModel.Insert(l.ctx, nil, ua)
	if err != nil {
		return nil, err
	}
	return l.svcCtx.UserModel.FindOne(l.ctx, user.Id)
}

func (l *AuthLogic) getUserType(user *model.User) int64 {
	if user.Mobile.Valid {
		return model.UserTypeNormal
	}
	return model.UserTypeTemp
}