import fs from 'node:fs';
import {
  getJobOutputFile,
  listJobOutputs,
  listJobOutputsForJob
} from '../models/jobOutputModel.js';
import { getJob } from '../models/jobModel.js';
import { generateJobOutputs } from '../services/jobOutputService.js';

function isAdmin(req) {
  return req.user.role === 'admin';
}

export function index(req, res) {
  res.json(listJobOutputs(req.user.id, isAdmin(req)));
}

export function byJob(req, res) {
  res.json(listJobOutputsForJob(req.params.jobId, req.user.id, isAdmin(req)));
}

export async function generate(req, res) {
  const job = getJob(req.params.jobId, req.user.id, isAdmin(req));
  if (!job) return res.status(404).json({ error: 'Job not found' });
  await generateJobOutputs(req.params.jobId);
  const outputs = listJobOutputsForJob(req.params.jobId, req.user.id, isAdmin(req));
  if (!outputs.length) return res.status(409).json({ error: 'Job is not ready for output generation' });
  res.json(outputs);
}

export function content(req, res) {
  const result = getJobOutputFile(req.params.id, req.user.id, isAdmin(req));
  if (!result) return res.status(404).json({ error: 'Job output not found' });
  if (result.output.mimeType === 'application/json') {
    return res.json({ output: result.output, table: JSON.parse(fs.readFileSync(result.filePath, 'utf8')) });
  }
  if (result.output.mimeType.startsWith('text/')) {
    return res.json({ output: result.output, text: fs.readFileSync(result.filePath, 'utf8') });
  }
  return res.json({ output: result.output });
}

export function view(req, res) {
  const result = getJobOutputFile(req.params.id, req.user.id, isAdmin(req));
  if (!result) return res.status(404).json({ error: 'Job output not found' });
  res.type(result.output.mimeType || 'application/octet-stream');
  res.setHeader('Content-Disposition', `inline; filename="${encodeURIComponent(result.output.name)}"`);
  res.sendFile(result.filePath);
}

export function download(req, res) {
  const result = getJobOutputFile(req.params.id, req.user.id, isAdmin(req));
  if (!result) return res.status(404).json({ error: 'Job output not found' });
  res.download(result.filePath, result.output.name);
}