/**
 * 宇森 - Odoo 用户认证模块
 * 通过 Odoo JSON-RPC 实现登录/登出，与 Odoo 用户系统打通
 */
(function () {
  'use strict';

  const AUTH_URL = '/web/session/authenticate';
  const DESTROY_URL = '/web/session/destroy';
  const SESSION_URL = '/web/session/get_session_info';

  // ============ State ============
  let currentUser = null;

  // ============ Init ============
  async function init() {
    try {
      const resp = await fetch(SESSION_URL, { credentials: 'same-origin' });
      if (resp.ok) {
        const data = await resp.json();
        if (data.result && data.result.uid) {
          currentUser = {
            uid: data.result.uid,
            username: data.result.username,
            name: data.result.name || data.result.username,
          };
        }
      }
    } catch (e) {
      // Not logged in — that's fine
    }
    renderAuthUI();
  }

  // ============ Login ============
  async function login(username, password) {
    const body = {
      jsonrpc: '2.0',
      method: 'call',
      params: {
        db: 'game',
        login: username,
        password: password,
      },
      id: Date.now(),
    };

    const resp = await fetch(AUTH_URL, {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify(body),
      credentials: 'same-origin',
    });

    const data = await resp.json();
    if (data.error) {
      throw new Error(data.error.data?.message || '登录失败，请检查用户名和密码');
    }

    if (data.result && data.result.uid) {
      currentUser = {
        uid: data.result.uid,
        username: data.result.username,
        name: data.result.name || data.result.username,
      };
      renderAuthUI();
      return currentUser;
    }
    throw new Error('登录失败');
  }

  // ============ Logout ============
  async function logout() {
    try {
      await fetch(DESTROY_URL, {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({ jsonrpc: '2.0', method: 'call', params: {}, id: Date.now() }),
        credentials: 'same-origin',
      });
    } catch (e) {
      // ignore
    }
    currentUser = null;
    renderAuthUI();
  }

  // ============ Render ============
  function renderAuthUI() {
    const container = document.getElementById('auth-area');
    if (!container) return;

    if (currentUser) {
      container.innerHTML =
        '<span class="user-name">' +
        escapeHtml(currentUser.name) +
        '</span>' +
        '<button class="auth-btn logout-btn" onclick="YuSenAuth.logout()">退出</button>';
    } else {
      container.innerHTML =
        '<button class="auth-btn login-btn" onclick="YuSenAuth.showLoginModal()">登录</button>';
    }
  }

  // ============ Login Modal ============
  function showLoginModal() {
    // Remove existing modal
    const existing = document.getElementById('login-modal');
    if (existing) existing.remove();

    const modal = document.createElement('div');
    modal.id = 'login-modal';
    modal.innerHTML =
      '<div class="login-overlay" onclick="YuSenAuth.hideLoginModal(event)">' +
      '<div class="login-box" onclick="event.stopPropagation()">' +
      '<h2>登录宇森</h2>' +
      '<p class="login-sub">使用 Odoo 账号登录</p>' +
      '<form id="login-form" onsubmit="return false">' +
      '<input type="text" id="login-username" placeholder="用户名" autocomplete="username" />' +
      '<input type="password" id="login-password" placeholder="密码" autocomplete="current-password" />' +
      '<div id="login-error" class="login-error"></div>' +
      '<button type="submit" class="login-submit" id="login-submit-btn">登 录</button>' +
      '</form>' +
      '<p class="login-footer">还没有账号？前往 <a href="https://game.pengyuthon.cn/web/login?db=game" target="_blank">Odoo 后台</a></p>' +
      '</div>' +
      '</div>';

    document.body.appendChild(modal);

    const form = modal.querySelector('#login-form');
    form.onsubmit = handleLogin;

    // Focus username
    setTimeout(() => {
      const u = document.getElementById('login-username');
      if (u) u.focus();
    }, 100);
  }

  function hideLoginModal(e) {
    if (e && e.target !== e.currentTarget) return;
    const modal = document.getElementById('login-modal');
    if (modal) modal.remove();
  }

  async function handleLogin() {
    const username = document.getElementById('login-username').value.trim();
    const password = document.getElementById('login-password').value;
    const errEl = document.getElementById('login-error');
    const btn = document.getElementById('login-submit-btn');

    if (!username || !password) {
      errEl.textContent = '请输入用户名和密码';
      return;
    }

    btn.disabled = true;
    btn.textContent = '登录中...';
    errEl.textContent = '';

    try {
      await login(username, password);
      hideLoginModal({ target: document.querySelector('.login-overlay') });
    } catch (e) {
      errEl.textContent = e.message;
    } finally {
      btn.disabled = false;
      btn.textContent = '登 录';
    }
  }

  function escapeHtml(str) {
    const div = document.createElement('div');
    div.textContent = str;
    return div.innerHTML;
  }

  // ============ Public API ============
  window.YuSenAuth = {
    init,
    login,
    logout,
    showLoginModal,
    hideLoginModal,
    getCurrentUser: () => currentUser,
    isLoggedIn: () => !!currentUser,
  };
})();