/*
 * MC Report System
 * Copyright (C) 2026 Sea Network Technology Studio
 * Author: CangLan <admin@sea-studio.top>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published
 * by the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */

const express = require('express');
const { query, getRow } = require('../db');
const { authenticate, requireRole } = require('../middleware/auth');

const router = express.Router();

function parseDuration(d) {
  if (!d) return 0;
  const m = String(d).match(/(\d+)/);
  return m ? parseInt(m[1]) : 0;
}

router.get('/', authenticate, async (req, res) => {
  const rows = await query('SELECT * FROM bans ORDER BY created_at DESC LIMIT 200');
  res.json(rows);
});

router.get('/active', authenticate, async (req, res) => {
  res.json(await query("SELECT * FROM bans WHERE status = 'active' ORDER BY created_at DESC"));
});

router.get('/min-duration', authenticate, async (req, res) => {
  const { player_name, player_uid, type } = req.query;
  const prev = await getRow('SELECT * FROM bans WHERE (player_name = ? OR player_uid = ?) AND type = ? AND status = ? ORDER BY created_at DESC LIMIT 1',
    [player_name||'', player_uid||'', type||'ban', 'active']);
  res.json({ minDays: prev ? parseDuration(prev.duration) : 0 });
});

router.post('/', authenticate, requireRole('owner'), async (req, res) => {
  try {
    const { player_name, player_uid, reason, type, duration, ticket_id, expires_at, source } = req.body;
    if (!player_name) return res.status(400).json({ error: '玩家名为必填' });
    if (player_name.length > 50) return res.status(400).json({ error: '玩家名过长' });
    if (type && !['ban','mute','warn','other'].includes(type)) return res.status(400).json({ error: '无效的处罚类型' });

    const durDays = parseDuration(duration);
    const prev = await getRow('SELECT * FROM bans WHERE (player_name = ? OR player_uid = ?) AND type = ? AND status = ? ORDER BY created_at DESC LIMIT 1',
      [player_name, player_uid||'', type||'ban', 'active']);
    if (prev && durDays > 0 && parseDuration(prev.duration) > durDays) {
      return res.status(400).json({ error: `该玩家已有${parseDuration(prev.duration)}天处罚记录，新处罚时长不可少于上次（需 ≥ ${parseDuration(prev.duration)}天）` });
    }

    const r = await query('INSERT INTO bans(player_name, player_uid, source, reason, type, duration, ticket_id, created_by, expires_at) VALUES (?,?,?,?,?,?,?,?,?)',
      [player_name, player_uid||'', source||'', reason||'', type||'ban', duration||'', ticket_id||null, req.user.id, expires_at||null]);
    if (ticket_id) {
      await query("INSERT INTO responses(ticket_id, user_id, content, is_staff) VALUES (?,?,?,1)",
        [ticket_id, req.user.id, `【处罚记录】${type==='ban'?'封禁':type==='mute'?'禁言':type==='warn'?'警告':'其他'}: ${player_name}${duration?' 时长:'+duration:''}${reason?' 原因:'+reason:''}`]);
    }
    res.status(201).json({ id: r.insertId });
  } catch (err) {
    console.error('[bans]', err);
    res.status(500).json({ error: '添加失败: ' + err.message });
  }
});

router.put('/:id', authenticate, requireRole('owner'), async (req, res) => {
  const fields = {};
  if (req.body.status) {
    if (!['active','expired','appealed','lifted'].includes(req.body.status)) return res.status(400).json({ error: '无效的状态值' });
    fields.status = req.body.status;
  }
  if (req.body.reason !== undefined) fields.reason = req.body.reason;
  if (req.body.duration !== undefined) fields.duration = req.body.duration;
  if (!Object.keys(fields).length) return res.status(400).json({ error: '无更新内容' });
  const sets = Object.keys(fields).map(k => `${k} = ?`).join(', ');
  await query(`UPDATE bans SET ${sets} WHERE id = ?`, [...Object.values(fields), req.params.id]);
  res.json({ message: '更新成功' });
});

router.delete('/:id', authenticate, requireRole('owner'), async (req, res) => {
  const id = parseInt(req.params.id);
  if (!id) return res.status(400).json({ error: '无效的ID' });
  await query('DELETE FROM bans WHERE id = ?', [id]);
  res.json({ message: '已删除' });
});

module.exports = router;