// node_api/routes/jobs.js
const express = require('express');
const { jobManager } = require('../services/jobManager');
const { DepreciationJob } = require('../jobs/depreciationJob');
const { DepreciationDatabase } = require('../jobs/depreciationDatabase');
const { logger } = require('../utils/logger');

const router = express.Router();

/**
 * Get job manager status and all job statuses
 */
router.get('/status', async (req, res) => {
  try {
    const status = jobManager.getJobStatuses();
    res.json(status);
  } catch (error) {
    logger.error('Error getting job status:', error);
    res.status(500).json({ error: error.message });
  }
});

/**
 * Get job manager health check
 */
router.get('/health', async (req, res) => {
  try {
    const health = await jobManager.healthCheck();
    const statusCode = health.status === 'healthy' ? 200 : 
                      health.status === 'degraded' ? 206 : 500;
    res.status(statusCode).json(health);
  } catch (error) {
    logger.error('Error getting job health:', error);
    res.status(500).json({ error: error.message });
  }
});

/**
 * Run a job manually
 */
router.post('/run/:jobName', async (req, res) => {
  try {
    const { jobName } = req.params;
    const { calculationDate } = req.body;
    
    if (!['depreciation'].includes(jobName)) {
      return res.status(400).json({ error: 'Invalid job name' });
    }

    const result = await jobManager.runJobManually(jobName);
    res.json({
      success: true,
      jobName,
      result
    });
  } catch (error) {
    logger.error(`Error running job manually: ${req.params.jobName}`, error);
    res.status(500).json({ error: error.message });
  }
});

/**
 * Get job execution history
 */
router.get('/history/:jobName', async (req, res) => {
  try {
    const { jobName } = req.params;
    const limit = parseInt(req.query.limit) || 50;
    
    const history = await jobManager.getJobHistory(jobName, limit);
    res.json(history);
  } catch (error) {
    logger.error(`Error getting job history: ${req.params.jobName}`, error);
    res.status(500).json({ error: error.message });
  }
});

/**
 * Preview depreciation calculation for an asset
 */
router.get('/depreciation/preview/:assetId', async (req, res) => {
  try {
    const { assetId } = req.params;
    const calculationDate = req.query.date ? new Date(req.query.date) : new Date();
    
    const job = new DepreciationJob();
    const preview = await job.previewDepreciation(assetId, calculationDate);
    
    res.json(preview);
  } catch (error) {
    logger.error(`Error previewing depreciation for asset: ${req.params.assetId}`, error);
    res.status(500).json({ error: error.message });
  }
});

/**
 * Run depreciation for a specific asset
 */
router.post('/depreciation/asset/:assetId', async (req, res) => {
  try {
    const { assetId } = req.params;
    const { calculationDate } = req.body;
    
    const job = new DepreciationJob();
    const result = await job.runForAsset(assetId, calculationDate ? new Date(calculationDate) : new Date());
    
    res.json({
      success: true,
      assetId,
      result
    });
  } catch (error) {
    logger.error(`Error running depreciation for asset: ${req.params.assetId}`, error);
    res.status(500).json({ error: error.message });
  }
});

/**
 * Get depreciation summary for a period
 */
router.get('/depreciation/summary', async (req, res) => {
  try {
    const startDate = req.query.startDate ? new Date(req.query.startDate) : new Date(new Date().getFullYear(), new Date().getMonth(), 1);
    const endDate = req.query.endDate ? new Date(req.query.endDate) : new Date();
    
    const database = new DepreciationDatabase();
    const summary = await database.getDepreciationSummary(startDate, endDate);
    
    res.json({
      period: {
        startDate: startDate.toISOString(),
        endDate: endDate.toISOString()
      },
      summary
    });
  } catch (error) {
    logger.error('Error getting depreciation summary:', error);
    res.status(500).json({ error: error.message });
  }
});

/**
 * Get monthly depreciation report
 */
router.get('/depreciation/report/:year/:month', async (req, res) => {
  try {
    const year = parseInt(req.params.year);
    const month = parseInt(req.params.month);
    
    if (isNaN(year) || isNaN(month) || month < 1 || month > 12) {
      return res.status(400).json({ error: 'Invalid year or month' });
    }
    
    const database = new DepreciationDatabase();
    const report = await database.getMonthlyDepreciationReport(year, month);
    
    res.json({
      period: { year, month },
      report
    });
  } catch (error) {
    logger.error('Error getting monthly depreciation report:', error);
    res.status(500).json({ error: error.message });
  }
});

/**
 * Get depreciation issues (over-depreciated assets, calculation mismatches, etc.)
 */
router.get('/depreciation/issues', async (req, res) => {
  try {
    const database = new DepreciationDatabase();
    const issues = await database.getDepreciationIssues();
    
    res.json({
      issues,
      count: issues.length
    });
  } catch (error) {
    logger.error('Error getting depreciation issues:', error);
    res.status(500).json({ error: error.message });
  }
});

/**
 * Fix depreciation calculation mismatches
 */
router.post('/depreciation/fix-mismatches', async (req, res) => {
  try {
    const database = new DepreciationDatabase();
    const fixedCount = await database.fixCalculationMismatches();
    
    res.json({
      success: true,
      message: `Fixed calculation mismatches for ${fixedCount} assets`,
      fixedCount
    });
  } catch (error) {
    logger.error('Error fixing calculation mismatches:', error);
    res.status(500).json({ error: error.message });
  }
});

/**
 * Get depreciation records for a specific asset
 */
router.get('/depreciation/asset/:assetId/records', async (req, res) => {
  try {
    const { assetId } = req.params;
    const limit = parseInt(req.query.limit) || 50;
    
    const database = new DepreciationDatabase();
    const client = await database.pool.connect();
    
    try {
      const query = `
        SELECT *
        FROM asset_depreciation_records
        WHERE asset_id = $1
        ORDER BY depreciation_date DESC
        LIMIT $2
      `;
      
      const result = await client.query(query, [assetId, limit]);
      
      res.json({
        assetId,
        records: result.rows
      });
    } finally {
      client.release();
    }
  } catch (error) {
    logger.error(`Error getting depreciation records for asset: ${req.params.assetId}`, error);
    res.status(500).json({ error: error.message });
  }
});

/**
 * Start job manager (admin only)
 */
router.post('/start', async (req, res) => {
  try {
    await jobManager.start();
    res.json({
      success: true,
      message: 'Job manager started successfully'
    });
  } catch (error) {
    logger.error('Error starting job manager:', error);
    res.status(500).json({ error: error.message });
  }
});

/**
 * Stop job manager (admin only)
 */
router.post('/stop', async (req, res) => {
  try {
    await jobManager.stop();
    res.json({
      success: true,
      message: 'Job manager stopped successfully'
    });
  } catch (error) {
    logger.error('Error stopping job manager:', error);
    res.status(500).json({ error: error.message });
  }
});

module.exports = router;