package client

import (
	"context"
	"errors"
	"time"

	"gorm.io/gorm"

	"github.com/topfans/backend/pkg/models"
)

// UserClient 验证 user 目标存在 + 返回 star_id
type UserClient struct {
	db *gorm.DB
}

func NewUserClient(db *gorm.DB) *UserClient {
	return &UserClient{db: db}
}

// GetUserForReport 验证用户存在 + 返回 (star_id, snapshot)
// user.nickname/star_id 在 fan_profiles 表里（多对一关系）
func (c *UserClient) GetUserForReport(ctx context.Context, userID int64) (starID int64, snapshot map[string]interface{}, err error) {
	var user models.User
	if err = c.db.WithContext(ctx).First(&user, userID).Error; err != nil {
		if errors.Is(err, gorm.ErrRecordNotFound) {
			return 0, nil, ErrTargetNotFound
		}
		return 0, nil, err
	}
	// 从 fan_profiles 拉 nickname + star_id
	var fp models.FanProfile
	if err = c.db.WithContext(ctx).
		Where("user_id = ?", userID).
		Order("star_id ASC").
		First(&fp).Error; err != nil && !errors.Is(err, gorm.ErrRecordNotFound) {
		return 0, nil, err
	}
	starID = fp.StarID
	snapshot = map[string]interface{}{
		"user_id":     user.ID,
		"nickname":    fp.Nickname,
		"avatar_url":  user.AvatarURL,
		"star_id":     starID,
		"snapshot_at": time.Now().UnixMilli(),
	}
	return starID, snapshot, nil
}