package auth

import (
	"context"
	"errors"
	"time"

	"photography-backend/internal/svc"
	"photography-backend/internal/types"
	"photography-backend/pkg/utils/hash"
	"photography-backend/pkg/utils/jwt"

	"github.com/zeromicro/go-zero/core/logx"
)

type LoginLogic struct {
	logx.Logger
	ctx    context.Context
	svcCtx *svc.ServiceContext
}

// 用户登录
func NewLoginLogic(ctx context.Context, svcCtx *svc.ServiceContext) *LoginLogic {
	return &LoginLogic{
		Logger: logx.WithContext(ctx),
		ctx:    ctx,
		svcCtx: svcCtx,
	}
}

func (l *LoginLogic) Login(req *types.LoginRequest) (resp *types.LoginResponse, err error) {
	// 1. 验证用户名和密码
	user, err := l.svcCtx.UserModel.FindOneByUsername(l.ctx, req.Username)
	if err != nil {
		return nil, err
	}
	
	// 2. 验证密码
	if !hash.CheckPassword(req.Password, user.Password) {
		return nil, errors.New("用户名或密码错误")
	}
	
	// 3. 检查用户状态
	if user.Status == 0 {
		return nil, errors.New("用户已被禁用")
	}
	
	// 4. 生成 JWT token
	token, err := jwt.GenerateToken(user.Id, user.Username, l.svcCtx.Config.Auth.AccessSecret, time.Hour*24*7)
	if err != nil {
		return nil, err
	}
	
	// 5. 返回登录结果
	return &types.LoginResponse{
		BaseResponse: types.BaseResponse{
			Code:    200,
			Message: "登录成功",
		},
		Data: types.LoginData{
			Token: token,
			User: types.User{
				Id:        user.Id,
				Username:  user.Username,
				Email:     user.Email,
				Avatar:    user.Avatar,
				Status:    int(user.Status),
				CreatedAt: user.CreatedAt.Unix(),
				UpdatedAt: user.UpdatedAt.Unix(),
			},
		},
	}, nil
}