// db/db.go
package db

import (
	"cn/oneao/base-go/config"
	sqlcg "cn/oneao/base-go/db/sqlc"
	"context"
	"fmt"
	"github.com/jackc/pgx/v5/pgxpool"
	"time"
)

var (
	DB       *pgxpool.Pool
	DBClient *sqlcg.Queries
)

func InitDB() error {
	cfg := config.Db

	sslMode := "disable"
	if cfg.SllMode {
		sslMode = "require"
	}

	// 构建 DSN
	dsn := fmt.Sprintf(
		"postgres://%s:%s@%s:%d/%s?sslmode=%s&TimeZone=%s",
		cfg.User, cfg.Password, cfg.Host, cfg.Port, cfg.Dbname, sslMode, cfg.TimeZone,
	)

	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
	defer cancel()

	pool, err := pgxpool.New(ctx, dsn)
	if err != nil {
		return fmt.Errorf("unable to connect to database: %w", err)
	}

	// 测试连接
	if err := pool.Ping(ctx); err != nil {
		return fmt.Errorf("ping database failed: %w", err)
	}

	DB = pool

	// 初始化 sqlc Queries，全局可用
	DBClient = sqlcg.New(DB)

	// 可选：设置连接池参数
	pool.Config().MaxConns = int32(cfg.MaxOpenConns)
	pool.Config().MinConns = int32(cfg.MaxIdleConns)
	pool.Config().MaxConnLifetime = cfg.ConnMaxLifetime

	return nil
}