/**
 * Disk Metrics Controller
 * Handles API requests for disk usage and system metrics
 */

const DiskMetrics = require('../models/DiskMetrics.model');
const logger = require('../utils/logger.util');

/**
 * Get all metrics (local + remote)
 * GET /api/admin/disk-metrics
 */
async function getAllMetrics(req, res) {
  try {
    logger.info('Fetching disk metrics for all systems');
    const metrics = await DiskMetrics.getAllMetrics();

    // Add health status for each system
    if (metrics.local && metrics.local.usedPercent !== undefined) {
      metrics.local.health = DiskMetrics.getHealthStatus(metrics.local.usedPercent);
    }

    if (metrics.remote && metrics.remote.usedPercent !== undefined) {
      metrics.remote.health = DiskMetrics.getHealthStatus(metrics.remote.usedPercent);
    }

    res.json({
      success: true,
      data: metrics
    });
  } catch (error) {
    logger.error('Get all metrics error:', error);
    res.status(500).json({
      success: false,
      error: 'Failed to fetch disk metrics',
      message: error.message
    });
  }
}

/**
 * Get local metrics only
 * GET /api/admin/disk-metrics/local
 */
async function getLocalMetrics(req, res) {
  try {
    logger.info('Fetching local disk metrics');
    const metrics = await DiskMetrics.getLocalMetrics();

    if (metrics.usedPercent !== undefined) {
      metrics.health = DiskMetrics.getHealthStatus(metrics.usedPercent);
    }

    res.json({
      success: true,
      data: metrics
    });
  } catch (error) {
    logger.error('Get local metrics error:', error);
    res.status(500).json({
      success: false,
      error: 'Failed to fetch local metrics',
      message: error.message
    });
  }
}

/**
 * Get remote metrics only
 * GET /api/admin/disk-metrics/remote
 */
async function getRemoteMetrics(req, res) {
  try {
    logger.info('Fetching remote disk metrics');
    const metrics = await DiskMetrics.getRemoteMetrics();

    if (metrics.usedPercent !== undefined) {
      metrics.health = DiskMetrics.getHealthStatus(metrics.usedPercent);
    }

    res.json({
      success: true,
      data: metrics
    });
  } catch (error) {
    logger.error('Get remote metrics error:', error);
    res.status(500).json({
      success: false,
      error: 'Failed to fetch remote metrics',
      message: error.message
    });
  }
}

module.exports = {
  getAllMetrics,
  getLocalMetrics,
  getRemoteMetrics
};