package main

import (
	dao "cid/dao/copydata"
	taskDto "cid/model/dto/copydata"
	"cid/sync"
	"context"
	"fmt"
	"strings"
	"time"

	"gitea.com/red-future/common/beans"
	_ "github.com/gogf/gf/contrib/drivers/pgsql/v2"
	"github.com/gogf/gf/v2/os/gctx"
	"github.com/sirupsen/logrus"
)

type CompensationScheduler struct {
	syncService *sync.SyncService
}

func NewCompensationScheduler() *CompensationScheduler {
	return &CompensationScheduler{
		syncService: sync.NewSyncService(),
	}
}

func (s *CompensationScheduler) RunCompensationOnce() {
	ctx := gctx.New()
	ctx = context.WithValue(ctx, "user", &beans.User{UserName: "admin"})

	logrus.Info("=== 开始执行数据同步补偿任务 ===")
	s.processCompensation(ctx)
	logrus.Info("=== 补偿任务执行完毕 ===")
}

func (s *CompensationScheduler) processCompensation(ctx context.Context) {
	logrus.Info(">>> 开始扫描需要补偿的失败分页任务...")

	queryReq := &taskDto.QueryFailedTasksReq{
		Status:   []string{"failed"},
		TaskType: "account_report_page",
		Limit:    50,
	}

	failedPageTasks, err := dao.SyncTaskLog.QueryFailedTasks(ctx, queryReq)
	if err != nil {
		logrus.Errorf("查询失败的分页任务异常：%v", err)
		return
	}

	if len(failedPageTasks) == 0 {
		logrus.Info("✓ 当前没有需要补偿的失败分页任务")
		return
	}

	logrus.Infof("发现 %d 个需要补偿的失败分页任务，开始逐个处理...", len(failedPageTasks))

	successCount := 0
	failCount := 0

	for _, pageTask := range failedPageTasks {
		if pageTask.RetryCount >= pageTask.MaxRetry {
			logrus.Warnf("⚠ 分页任务 %s 已达到最大重试次数 %d，标记为需人工处理", pageTask.TaskID, pageTask.MaxRetry)

			updateReq := &taskDto.UpdateSyncTaskLogReq{
				ID:           pageTask.Id,
				Status:       "manual_review",
				ErrorMessage: fmt.Sprintf("已达到最大重试次数 %d 次", pageTask.MaxRetry),
				ErrorCode:    "MAX_RETRY_EXCEEDED",
			}
			dao.SyncTaskLog.Update(ctx, updateReq)

			s.sendAlert(pageTask)
			failCount++
			continue
		}

		logrus.Infof("▶ 开始补偿分页任务：%s (广告主=%d, 第 %d/%d 次重试)",
			pageTask.TaskID, pageTask.AdvertiserID, pageTask.RetryCount+1, pageTask.MaxRetry)

		if s.compensatePageTask(ctx, pageTask) {
			successCount++
			logrus.Infof("✓ 分页任务 %s 补偿成功", pageTask.TaskID)

			parentTaskID := s.extractParentTaskID(pageTask.TaskID)
			if parentTaskID != "" {
				s.checkAndUpdateParentTaskStatus(ctx, parentTaskID)
			}
		} else {
			failCount++
			logrus.Warnf("✗ 分页任务 %s 补偿失败", pageTask.TaskID)
		}

		time.Sleep(1 * time.Second)
	}

	logrus.Infof("=== 补偿任务执行完成：总计=%d, 成功=%d, 失败=%d ===",
		len(failedPageTasks), successCount, failCount)
}

func (s *CompensationScheduler) compensatePageTask(ctx context.Context, pageTask *taskDto.SyncTaskLogItem) bool {
	retryCount := pageTask.RetryCount + 1

	updateReq := &taskDto.UpdateSyncTaskLogReq{
		ID:         pageTask.Id,
		Status:     "retrying",
		RetryCount: &retryCount,
	}
	dao.SyncTaskLog.Update(ctx, updateReq)

	startTime := s.parseTime(pageTask.StartTime)
	endTime := s.parseTime(pageTask.EndTime)

	pageNumber := s.extractPageNumber(pageTask.TaskID)
	if pageNumber == 0 {
		logrus.Errorf("无法从任务ID %s 解析页码", pageTask.TaskID)
		s.markPageTaskFailed(ctx, pageTask.Id, retryCount, "无法解析页码", "PARSE_PAGE_NUMBER_FAILED")
		return false
	}

	req := &sync.AccountReportRequest{
		AdvertiserID:  pageTask.AdvertiserID,
		StartTime:     startTime.UnixMilli(),
		EndTime:       endTime.UnixMilli(),
		SelectColumns: []string{"impression", "click", "cost", "t0GMV"},
		GroupType:     1,
		QueryVersion:  1,
		PageInfo: &sync.PageInfo{
			CurrentPage: pageNumber,
			PageSize:    100,
		},
	}

	maxRetries := 3
	parentTaskID := s.extractParentTaskID(pageTask.TaskID)
	pageTaskID := fmt.Sprintf("%s_page_%d", parentTaskID, pageNumber)

	result, err := s.syncService.SyncSinglePageWithTask(ctx, req, true, maxRetries, pageTaskID, pageNumber)

	if err != nil {
		logrus.Errorf("补偿分页任务 %s 失败（第 %d 次）：%v", pageTask.TaskID, retryCount, err)
		s.markPageTaskFailed(ctx, pageTask.Id, retryCount, err.Error(), "PAGE_COMPENSATION_FAILED")
		return false
	}

	logrus.Infof("✓ 补偿分页任务 %s 成功 - 记录数=%d", pageTask.TaskID, result.DetailCount)
	return true
}

func (s *CompensationScheduler) markPageTaskFailed(ctx context.Context, taskID int64, retryCount int, errMsg, errCode string) {
	backoffMinutes := s.calculateBackoff(retryCount)
	nextRetry := time.Now().Add(time.Duration(backoffMinutes) * time.Minute)

	updateReq := &taskDto.UpdateSyncTaskLogReq{
		ID:            taskID,
		Status:        "failed",
		ErrorMessage:  errMsg,
		ErrorCode:     errCode,
		NextRetryTime: nextRetry,
	}
	dao.SyncTaskLog.Update(ctx, updateReq)
}

func (s *CompensationScheduler) checkAndUpdateParentTaskStatus(ctx context.Context, parentTaskID string) {
	logrus.Infof(">>> 检查主任务 %s 的所有分页任务状态...", parentTaskID)

	parentTask, err := dao.SyncTaskLog.GetByTaskID(ctx, parentTaskID, "account_report")
	if err != nil || parentTask == nil {
		logrus.Warnf("未找到主任务 %s，跳过状态更新", parentTaskID)
		return
	}

	if parentTask.Status == "success" {
		logrus.Infof("主任务 %s 已经是成功状态，无需更新", parentTaskID)
		return
	}

	allPageTasks, err := dao.SyncTaskLog.QueryAllPageTasksByParentID(ctx, parentTaskID, 1000)
	if err != nil {
		logrus.Errorf("查询主任务 %s 的分页任务失败：%v", parentTaskID, err)
		return
	}

	if len(allPageTasks) == 0 {
		logrus.Warnf("主任务 %s 没有找到任何分页任务", parentTaskID)
		return
	}

	failedPages := make([]int, 0)
	successPages := make([]int, 0)

	for _, pageTask := range allPageTasks {
		pageNumber := s.extractPageNumber(pageTask.TaskID)
		if pageTask.Status == "success" {
			successPages = append(successPages, pageNumber)
		} else if pageTask.Status == "failed" || pageTask.Status == "manual_review" {
			failedPages = append(failedPages, pageNumber)
		}
	}

	logrus.Infof("主任务 %s 分页状态：总数=%d, 成功=%d, 失败=%d",
		parentTaskID, len(allPageTasks), len(successPages), len(failedPages))

	if len(failedPages) == 0 {
		logrus.Infof("✓ 主任务 %s 的所有分页任务都已成功，更新主任务状态为 success", parentTaskID)

		summary := map[string]interface{}{
			"total_pages":   len(allPageTasks),
			"success_pages": len(successPages),
			"failed_pages":  0,
			"compensated":   true,
		}

		updateReq := &taskDto.UpdateSyncTaskLogReq{
			ID:            parentTask.Id,
			Status:        "success",
			ResultSummary: summary,
		}
		if err := dao.SyncTaskLog.Update(ctx, updateReq); err != nil {
			logrus.Errorf("更新主任务 %s 状态失败：%v", parentTaskID, err)
		}
	} else {
		logrus.Infof("⚠ 主任务 %s 仍有 %d 个失败的分页任务：%v，保持部分失败状态",
			parentTaskID, len(failedPages), failedPages)
	}
}

func (s *CompensationScheduler) extractParentTaskID(taskID string) string {
	if idx := strings.LastIndex(taskID, "_page_"); idx > 0 {
		return taskID[:idx]
	}
	return ""
}

func (s *CompensationScheduler) extractPageNumber(taskID string) int {
	if idx := strings.LastIndex(taskID, "_page_"); idx > 0 {
		var pageNum int
		fmt.Sscanf(taskID[idx+6:], "%d", &pageNum)
		return pageNum
	}
	return 0
}

func (s *CompensationScheduler) calculateBackoff(retryCount int) int {
	backoffs := []int{5, 15, 30, 60, 120}
	if retryCount <= len(backoffs) {
		return backoffs[retryCount-1]
	}
	return backoffs[len(backoffs)-1]
}

func (s *CompensationScheduler) parseTime(t interface{}) time.Time {
	switch v := t.(type) {
	case time.Time:
		return v
	case string:
		if parsed, err := time.Parse("2006-01-02 15:04:05", v); err == nil {
			return parsed
		}
	}
	return time.Now()
}

func (s *CompensationScheduler) sendAlert(task *taskDto.SyncTaskLogItem) {
	logrus.Errorf("【告警】分页任务 %s 需要人工介入：广告主=%d, 错误=%s",
		task.TaskID, task.AdvertiserID, task.ErrorMessage)
}

func main() {
	scheduler := NewCompensationScheduler()
	scheduler.RunCompensationOnce()
}