package logic

import (
	"context"
	"database/sql"
	"errors"

	"github.com/zero-ppanel/zero-ppanel/apps/rpc/core/core"
	"github.com/zero-ppanel/zero-ppanel/apps/rpc/core/internal/repo"
	"github.com/zero-ppanel/zero-ppanel/apps/rpc/core/internal/svc"
	"github.com/zero-ppanel/zero-ppanel/pkg/xerr"

	"github.com/zeromicro/go-zero/core/logx"
	"google.golang.org/grpc/codes"
	"google.golang.org/grpc/status"
)

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

func NewDeviceLoginLogic(ctx context.Context, svcCtx *svc.ServiceContext) *DeviceLoginLogic {
	return &DeviceLoginLogic{
		ctx:    ctx,
		svcCtx: svcCtx,
		Logger: logx.WithContext(ctx),
	}
}

// DeviceLogin 设备登录：查设备 → 不存在则注册 → 返回用户信息
func (l *DeviceLoginLogic) DeviceLogin(in *core.DeviceLoginReq) (*core.DeviceLoginResp, error) {
	// 1. 查询设备
	device, err := l.svcCtx.DeviceRepo.FindDeviceByIdentifier(l.ctx, in.Identifier)
	if err != nil && !errors.Is(err, sql.ErrNoRows) {
		l.Errorf("FindDeviceByIdentifier error: %v", err)
		return nil, status.Error(codes.Code(xerr.DatabaseQueryError), "查询设备失败")
	}

	var userID int64
	var isNewUser bool
	var isAdmin bool

	if errors.Is(err, sql.ErrNoRows) || device == nil {
		// 2. 设备不存在，创建用户+设备
		userID, err = l.svcCtx.DeviceRepo.CreateUserWithDevice(l.ctx, repo.CreateUserWithDeviceParams{
			Identifier: in.Identifier,
			UserAgent:  in.UserAgent,
			IP:         in.Ip,
			ShortCode:  in.ShortCode,
		})
		if err != nil {
			l.Errorf("CreateUserWithDevice error: %v", err)
			return nil, status.Error(codes.Code(xerr.DatabaseInsertError), "创建用户设备失败")
		}
		isNewUser = true

		// 记录注册日志
		_ = l.svcCtx.DeviceRepo.InsertLoginLog(l.ctx, repo.LoginLogParams{
			UserID:    userID,
			Method:    "device",
			IP:        in.Ip,
			UserAgent: in.UserAgent,
			Success:   true,
		})
	} else {
		// 3. 设备存在，检查是否启用
		if !device.Enabled {
			return nil, status.Error(codes.Code(xerr.DeviceNotEnabled), "设备已禁用")
		}

		userID = device.UserID

		// 查用户信息
		user, err := l.svcCtx.DeviceRepo.FindUserByID(l.ctx, userID)
		if err != nil {
			l.Errorf("FindUserByID error: %v", err)
			return nil, status.Error(codes.Code(xerr.DatabaseQueryError), "查询用户失败")
		}

		if !user.Enable {
			return nil, status.Error(codes.Code(xerr.UserDisabled), "用户已禁用")
		}

		isAdmin = user.IsAdmin
	}

	// 4. 记录登录日志
	_ = l.svcCtx.DeviceRepo.InsertLoginLog(l.ctx, repo.LoginLogParams{
		UserID:    userID,
		Method:    "device",
		IP:        in.Ip,
		UserAgent: in.UserAgent,
		Success:   true,
	})

	return &core.DeviceLoginResp{
		UserId:    userID,
		IsAdmin:   isAdmin,
		IsDisabled: false,
		IsNewUser: isNewUser,
	}, nil
}