package servicemanagement

import (
	"context"
	"fmt"

	"git.x2erp.com/qdy/go-base/ctx"
	"git.x2erp.com/qdy/go-base/logger"
	"git.x2erp.com/qdy/go-base/model/response"
	"git.x2erp.com/qdy/go-base/util"
	"git.x2erp.com/qdy/go-db/factory/database"
)

// ServiceInfo 微服务信息
type ServiceInfo struct {
	ServiceName string `json:"service_name"`
	ConfigCount int    `json:"config_count"`
	Creator     string `json:"creator,omitempty"`
	CreatedAt   string `json:"created_at,omitempty"`
}

// GetServices 获取微服务列表
func GetServices(ctx context.Context, dbFactory *database.DBFactory, reqCtx *ctx.RequestContext) *response.QueryResult[[]ServiceInfo] {
	logger.Debug("GetServices-开始获取微服务列表")

	// 获取数据库连接
	db := dbFactory.GetDB()

	// 查询distinct service_name及其相关信息
	query := `
		SELECT 
			service_name,
			COUNT(*) as config_count,
			MIN(creator) as creator,
			MIN(created_at) as created_at
		FROM config_startup_svc 
		GROUP BY service_name
		ORDER BY service_name
	`

	rows, err := db.QueryxContext(ctx, query)
	if err != nil {
		logger.ErrorC(reqCtx, fmt.Sprintf("查询微服务列表失败: %v", err))
		return util.CreateErrorResult[[]ServiceInfo](fmt.Sprintf("查询微服务列表失败: %v", err), reqCtx)
	}
	defer rows.Close()

	var services []ServiceInfo
	for rows.Next() {
		var service ServiceInfo
		var creator, createdAt interface{}

		err := rows.Scan(&service.ServiceName, &service.ConfigCount, &creator, &createdAt)
		if err != nil {
			logger.ErrorC(reqCtx, fmt.Sprintf("扫描微服务数据失败: %v", err))
			continue
		}

		// 处理可能为nil的字段
		if creator != nil {
			service.Creator = fmt.Sprintf("%v", creator)
		}
		if createdAt != nil {
			service.CreatedAt = fmt.Sprintf("%v", createdAt)
		}

		services = append(services, service)
	}

	if err := rows.Err(); err != nil {
		logger.ErrorC(reqCtx, fmt.Sprintf("遍历微服务数据失败: %v", err))
		return util.CreateErrorResult[[]ServiceInfo](fmt.Sprintf("遍历微服务数据失败: %v", err), reqCtx)
	}

	logger.Debug(fmt.Sprintf("获取到 %d 个微服务", len(services)))
	return util.CreateSuccessResultData[[]ServiceInfo](services, reqCtx)
}