const express = require('express');
const { paginate, parsePaginationParams } = require('../pagination');

module.exports = function(ctx) {
  const router = express.Router();

  // ===== UPDATE MANAGEMENT ENDPOINTS =====

  // Check for updates
  router.post('/updates/check', ctx.asyncHandler(async (req, res) => {
    await ctx.updateManager.checkForUpdates();
    const updates = ctx.updateManager.getAvailableUpdates();
    res.json({ success: true, updates, count: updates.length });
  }, 'updates-check'));

  // Get available updates
  router.get('/updates/available', ctx.asyncHandler(async (req, res) => {
    const updates = ctx.updateManager.getAvailableUpdates();
    const paginationParams = parsePaginationParams(req.query);
    const result = paginate(updates, paginationParams);
    res.json({ success: true, updates: result.data, count: updates.length, ...(result.pagination && { pagination: result.pagination }) });
  }, 'updates-available'));

  // Update a container
  router.post('/updates/update/:containerId', ctx.asyncHandler(async (req, res) => {
    const result = await ctx.updateManager.updateContainer(req.params.containerId, req.body);
    res.json({ success: true, result });
  }, 'updates-update'));

  // Rollback update
  router.post('/updates/rollback/:containerId', ctx.asyncHandler(async (req, res) => {
    await ctx.updateManager.rollbackUpdate(req.params.containerId);
    res.json({ success: true, message: 'Rollback completed' });
  }, 'updates-rollback'));

  // Get update history
  router.get('/updates/history', ctx.asyncHandler(async (req, res) => {
    const paginationParams = parsePaginationParams(req.query);
    // When paginating, fetch all history so pagination can slice correctly
    const fetchLimit = paginationParams ? Number.MAX_SAFE_INTEGER : (parseInt(req.query.limit) || 50);
    const history = ctx.updateManager.getHistory(fetchLimit);
    const result = paginate(history, paginationParams);
    res.json({ success: true, history: result.data, ...(result.pagination && { pagination: result.pagination }) });
  }, 'updates-history'));

  // Configure auto-update
  router.post('/updates/auto-update/:containerId', ctx.asyncHandler(async (req, res) => {
    ctx.updateManager.configureAutoUpdate(req.params.containerId, req.body);
    res.json({ success: true, message: 'Auto-update configured' });
  }, 'updates-auto-update'));

  // Schedule update
  router.post('/updates/schedule/:containerId', ctx.asyncHandler(async (req, res) => {
    const { scheduledTime } = req.body;
    if (!scheduledTime) {
      return ctx.errorResponse(res, 400, 'scheduledTime is required');
    }
    ctx.updateManager.scheduleUpdate(req.params.containerId, scheduledTime);
    res.json({ success: true, message: 'Update scheduled', scheduledTime });
  }, 'updates-schedule'));

  return router;
};