package dao

import (
	"database/sql"
	"fmt"

	"dd_fiber_api/pkg/database"

	"github.com/didi/gendry/builder"
)

// AccessSource 访问来源
type AccessSource string

const (
	AccessSourcePurchase AccessSource = "PURCHASE" // 购买获得
	AccessSourceGrant    AccessSource = "GRANT"     // 系统或人工授权
)

// UserSectionAccessDAO 用户小节访问记录 DAO
type UserSectionAccessDAO struct {
	client *database.MySQLClient
}

// NewUserSectionAccessDAO 创建用户小节访问记录 DAO
func NewUserSectionAccessDAO(client *database.MySQLClient) *UserSectionAccessDAO {
	return &UserSectionAccessDAO{client: client}
}

// GetByUserAndSection 查询用户是否已拥有某个小节的访问权限
func (d *UserSectionAccessDAO) GetByUserAndSection(userID, sectionID string) (bool, error) {
	table := "camp_user_section_access"
	where := map[string]any{
		"user_id":    userID,
		"section_id": sectionID,
	}
	cond, vals, err := builder.BuildSelect(table, where, []string{"id"})
	if err != nil {
		return false, fmt.Errorf("构建查询失败: %v", err)
	}
	var id string
	err = d.client.DB.QueryRow(cond, vals...).Scan(&id)
	if err == sql.ErrNoRows {
		return false, nil
	}
	if err != nil {
		return false, fmt.Errorf("查询访问记录失败: %v", err)
	}
	return true, nil
}

// Create 创建访问记录（简化版本，只保留访问权限相关字段）
// 订单相关信息可以从 orders 表查询，不需要冗余存储
func (d *UserSectionAccessDAO) Create(
	id, userID, campID, sectionID string,
	paidPriceFen int32,
	accessSource AccessSource,
) error {
	table := "camp_user_section_access"

	data := []map[string]any{{
		"id":             id,
		"user_id":        userID,
		"camp_id":        campID,
		"section_id":     sectionID,
		"paid_price_fen": paidPriceFen,
		"access_source":  string(accessSource),
	}}

	cond, vals, err := builder.BuildInsert(table, data)
	if err != nil {
		return fmt.Errorf("构建插入失败: %v", err)
	}

	// 使用 ON DUPLICATE KEY UPDATE 实现幂等性
	// 如果已存在，只更新 paid_price_fen 和 access_source（避免重复插入）
	cond += " ON DUPLICATE KEY UPDATE paid_price_fen=VALUES(paid_price_fen), access_source=VALUES(access_source)"

	if _, err := d.client.DB.Exec(cond, vals...); err != nil {
		return fmt.Errorf("创建访问记录失败: %v", err)
	}
	return nil
}