/**
 * IIT 批量操作 Controller
 * 
 * 功能：
 * - 一键全量质控（事件级）
 * - 一键全量数据汇总
 * 
 * 用途：
 * - 运营管理端手动触发
 * - 未来可作为 AI 工具暴露
 * 
 * 版本：v3.1 - 事件级质控
 */

import { FastifyRequest, FastifyReply } from 'fastify';
import { PrismaClient } from '@prisma/client';
import { logger } from '../../../common/logging/index.js';
import { RedcapAdapter } from '../../iit-manager/adapters/RedcapAdapter.js';
import { createSkillRunner } from '../../iit-manager/engines/SkillRunner.js';
import { QcExecutor } from '../../iit-manager/engines/QcExecutor.js';
import { QcReportService } from '../../iit-manager/services/QcReportService.js';

const prisma = new PrismaClient();

interface BatchRequest {
  Params: { projectId: string };
}

export class IitBatchController {
  /**
   * 一键全量质控（事件级）
   * 
   * POST /api/v1/admin/iit-projects/:projectId/batch-qc
   * 
   * 功能：
   * 1. 使用 SkillRunner 进行事件级质控
   * 2. 每个 record+event 组合独立质控
   * 3. 规则根据 applicableEvents/applicableForms 动态过滤
   * 4. 质控日志自动保存到 iit_qc_logs（含 eventId）
   */
  async batchQualityCheck(
    request: FastifyRequest<BatchRequest>,
    reply: FastifyReply
  ) {
    const { projectId } = request.params;
    const startTime = Date.now();

    try {
      logger.info('[V3.1] Batch QC started', { projectId });

      const project = await prisma.iitProject.findUnique({
        where: { id: projectId },
        select: { id: true },
      });

      if (!project) {
        return reply.status(404).send({ error: '项目不存在' });
      }

      const executor = new QcExecutor(projectId);
      const batchResult = await executor.executeBatch({ triggeredBy: 'manual' });

      const { totalRecords, totalEvents, passed, failed, warnings, fieldStatusWrites, executionTimeMs } = batchResult;
      const passRate = totalEvents > 0 ? `${((passed / totalEvents) * 100).toFixed(1)}%` : '0%';

      // 自动刷新 QcReport 缓存，使业务端立即看到最新数据
      try {
        await QcReportService.refreshReport(projectId);
        logger.info('[V3.1] QcReport cache refreshed after batch QC', { projectId });
      } catch (reportErr: any) {
        logger.warn('[V3.1] QcReport refresh failed (non-blocking)', { projectId, error: reportErr.message });
      }

      const durationMs = Date.now() - startTime;
      logger.info('[V3.1] Batch QC completed', {
        projectId, totalRecords, totalEvents, passed, failed, warnings, durationMs,
      });

      return reply.send({
        success: true,
        message: '事件级全量质控完成（V3.1 QcExecutor）',
        stats: {
          totalRecords,
          totalEventCombinations: totalEvents,
          passed,
          failed,
          warnings,
          fieldStatusWrites,
          passRate,
        },
        durationMs,
      });

    } catch (error: any) {
      logger.error('Batch QC failed', { projectId, error: error.message });
      return reply.status(500).send({ error: `质控失败: ${error.message}` });
    }
  }

  /**
   * 一键全量数据汇总
   * 
   * POST /api/v1/admin/iit-projects/:projectId/batch-summary
   * 
   * 功能：
   * 1. 获取 REDCap 中所有记录
   * 2. 获取项目的所有表单（instruments）
   * 3. 为每条记录生成/更新录入汇总
   */
  async batchSummary(
    request: FastifyRequest<BatchRequest>,
    reply: FastifyReply
  ) {
    const { projectId } = request.params;
    const startTime = Date.now();

    try {
      logger.info('🔄 开始全量数据汇总', { projectId });

      // 1. 获取项目配置
      const project = await prisma.iitProject.findUnique({
        where: { id: projectId }
      });

      if (!project) {
        return reply.status(404).send({ error: '项目不存在' });
      }

      // 2. 从 REDCap 获取所有记录和表单信息
      const adapter = new RedcapAdapter(project.redcapUrl, project.redcapApiToken);
      
      const [allRecords, instruments] = await Promise.all([
        adapter.exportRecords({}),
        adapter.exportInstruments()
      ]);

      if (!allRecords || allRecords.length === 0) {
        return reply.send({
          success: true,
          message: '项目暂无记录',
          stats: { totalRecords: 0 }
        });
      }

      const totalForms = instruments?.length || 10;

      // 3. 按 record_id 分组并计算表单完成状态
      const recordMap = new Map<string, { data: any; forms: Set<string>; firstSeen: Date }>();
      
      for (const record of allRecords) {
        const recordId = record.record_id || record.id;
        if (!recordId) continue;

        const existing = recordMap.get(recordId);
        if (existing) {
          // 合并数据
          existing.data = { ...existing.data, ...record };
          // 记录表单
          if (record.redcap_repeat_instrument) {
            existing.forms.add(record.redcap_repeat_instrument);
          }
        } else {
          recordMap.set(recordId, {
            data: record,
            forms: new Set(record.redcap_repeat_instrument ? [record.redcap_repeat_instrument] : []),
            firstSeen: new Date()
          });
        }
      }

      // 4. 为每条记录更新汇总
      let summaryCount = 0;
      
      for (const [recordId, { data, forms, firstSeen }] of recordMap.entries()) {
        // 计算表单完成状态（简化：有数据即认为完成）
        const formStatus: Record<string, number> = {};
        const completedForms = forms.size || 1;  // 至少有1个表单有数据
        
        for (const form of forms) {
          formStatus[form] = 2;  // 2 = 完成
        }

        const completionRate = Math.min(100, Math.round((completedForms / totalForms) * 100));

        await prisma.iitRecordSummary.upsert({
          where: {
            projectId_recordId: { projectId, recordId }
          },
          create: {
            projectId,
            recordId,
            enrolledAt: firstSeen,
            lastUpdatedAt: new Date(),
            formStatus,
            totalForms,
            completedForms,
            completionRate,
            updateCount: 1
          },
          update: {
            lastUpdatedAt: new Date(),
            formStatus,
            totalForms,
            completedForms,
            completionRate,
            updateCount: { increment: 1 }
          }
        });

        summaryCount++;
      }

      // 5. 更新项目统计
      const avgCompletionRate = await prisma.iitRecordSummary.aggregate({
        where: { projectId },
        _avg: { completionRate: true }
      });

      await prisma.iitQcProjectStats.upsert({
        where: { projectId },
        create: {
          projectId,
          totalRecords: recordMap.size,
          avgCompletionRate: avgCompletionRate._avg.completionRate || 0
        },
        update: {
          totalRecords: recordMap.size,
          avgCompletionRate: avgCompletionRate._avg.completionRate || 0
        }
      });

      const durationMs = Date.now() - startTime;
      logger.info('✅ 全量数据汇总完成', {
        projectId,
        totalRecords: recordMap.size,
        summaryCount,
        durationMs
      });

      return reply.send({
        success: true,
        message: '全量数据汇总完成',
        stats: {
          totalRecords: recordMap.size,
          summariesUpdated: summaryCount,
          totalForms,
          avgCompletionRate: `${(avgCompletionRate._avg.completionRate || 0).toFixed(1)}%`
        },
        durationMs
      });

    } catch (error: any) {
      logger.error('❌ 全量数据汇总失败', { projectId, error: error.message });
      return reply.status(500).send({ error: `汇总失败: ${error.message}` });
    }
  }
}

export const iitBatchController = new IitBatchController();