package routes

import (
	"database/sql"
	"fmt"
	"time"

	"github.com/gin-gonic/gin"

	"git.x2erp.com/qdy/go-base/types"
)

// HealthHandler 返回一个处理函数
func HealthHandler(db *sql.DB, dbType string) gin.HandlerFunc {
	return func(c *gin.Context) {

		err := TestConnection(db, dbType)
		success := err == nil

		status := "DOWN"
		if success {
			status = "UP"
		}

		c.JSON(200, &types.QueryResult{
			Success: success,
			Data: map[string]interface{}{
				"status":         status,
				"time":           time.Now().Format(time.RFC3339),
				"database":       dbType,
				"databaseStatus": status,
			},
			Error: func() string {
				if err != nil {
					return err.Error()
				}
				return ""
			}(),
		})
	}
}

// testConnection 测试数据库连接
func TestConnection(db *sql.DB, dbType string) error {
	var query string
	switch dbType {
	case "mysql", "postgres", "sqlserver":
		query = "SELECT 1"
	case "oracle":
		query = "SELECT 1 FROM DUAL"
	default:
		query = "SELECT 1"
	}

	var result int
	err := db.QueryRow(query).Scan(&result)
	if err != nil {
		return err
	}

	if result != 1 {
		return fmt.Errorf("unexpected test result: %d", result)
	}

	return nil
}