/** Shared authentication state machine for modal and /sign/. */
(function () {
  'use strict';

  var config = window.aksrtData || {};
  var apiRoot = String(config.apiUrl || config.restUrl || '/wp-json/aksrt/v1').replace(/\/$/, '');
  var nonce = config.restNonce || '';

  function request(path, data) {
    return fetch(apiRoot + '/auth/' + path, {
      method: 'POST',
      credentials: 'same-origin',
      headers: { 'Content-Type': 'application/json', 'X-WP-Nonce': nonce },
      body: JSON.stringify(data),
    }).then(function (response) {
      return response.json().catch(function () { return {}; }).then(function (body) {
        if (!response.ok || body.success === false) {
          throw new Error(body.message || (body.data && body.data.message) || '请求失败，请稍后再试');
        }
        return body.data || body;
      });
    });
  }

  function formData(form) {
    var data = {};
    new FormData(form).forEach(function (value, key) {
      data[key] = value;
    });
    return data;
  }

  function escapeHtml(value) {
    return String(value || '').replace(/[&<>"']/g, function (char) {
      return { '&': '&amp;', '<': '&lt;', '>': '&gt;', '"': '&quot;', "'": '&#039;' }[char];
    });
  }

  function showToast(text, type) {
    if (!text) return;
    window.notyf(escapeHtml(text), type || 'info');
  }

  function activate(root, tab, updateUrl) {
    var panel = root.querySelector('[data-auth-panel="' + tab + '"]');
    if (!panel) return;
    root.querySelectorAll('[data-auth-panel]').forEach(function (item) { item.hidden = item !== panel; });
    root.dataset.activeTab = tab;
    if (updateUrl && root.dataset.surface === 'page' && window.history && window.URL) {
      var url = new URL(window.location.href);
      url.searchParams.set('tab', tab);
      window.history.replaceState({}, '', url.toString());
    }
    var focus = panel.querySelector('input:not([type="hidden"])');
    if (focus) window.setTimeout(function () { focus.focus(); }, 30);
		if (tab === 'oauth') loadQr(root);
  }

	function loadQr(root) {
		var box = root.querySelector('[data-auth-qrcode]');
		if (!box || box.dataset.loading === '1' || box.dataset.loaded === '1') return;
		box.dataset.loading = '1';
		request('qrcode-login', {}).then(function (result) {
			box.dataset.loading = '0';
			box.dataset.loaded = '1';
			box.innerHTML = result.qr_html || '';
			if (result.mode === 'scan' && result.token) pollQr(box, result.token, 0);
		}).catch(function (error) {
			box.dataset.loading = '0';
			box.dataset.loaded = '0';
			box.innerHTML = '<button type="button" data-auth-refresh-qr>二维码加载失败，点击重试</button>';
			showToast(error.message, 'danger');
		});
	}

	function pollQr(box, token, count) {
		if (!document.documentElement.contains(box) || count >= 100) return;
		window.setTimeout(function () {
			request('check-qrcode-login', { token: token }).then(function (result) {
				if (result.logged_in) {
					showToast('登录成功', 'success');
					window.location.assign(result.redirect || window.location.href);
					return;
				}
				if (result.status === 'expired') {
					box.dataset.loaded = '0';
					box.innerHTML = '<button type="button" data-auth-refresh-qr>二维码已过期，点击刷新</button>';
					showToast('二维码已过期，请刷新后重试', 'warning');
					return;
				}
				pollQr(box, token, count + 1);
			}).catch(function () { pollQr(box, token, count + 1); });
		}, 3000);
	}

	function submitQrCode(form) {
		var data = formData(form);
		var button = form.querySelector('button[type="submit"]');
		if (button) button.disabled = true;
		request('weixingzh-code', data).then(function (result) {
			showToast('登录成功', 'success');
			window.location.assign(result.redirect || window.location.href);
		}).catch(function (error) {
			if (button) button.disabled = false;
			showToast(error.message, 'danger');
		});
	}

  function setBusy(form, busy) {
    var button = form.querySelector('.sign-submit');
    if (!button) return;
    button.disabled = busy;
    var spinner = button.querySelector('.fa-spinner');
    if (spinner) spinner.hidden = !busy;
  }

  function startCountdown(button, seconds) {
    var original = button.dataset.label || button.textContent;
    button.dataset.label = original;
    button.disabled = true;
    var left = Math.max(1, Number(seconds) || 60);
    button.textContent = left + 's';
    var timer = window.setInterval(function () {
      left -= 1;
      if (left <= 0) {
        window.clearInterval(timer);
        button.disabled = false;
        button.textContent = original;
      } else {
        button.textContent = left + 's';
      }
    }, 1000);
  }

  function captchaScene(scene) {
    return scene === 'resetpassword' ? 'lostpassword' : scene;
  }

  function verifyCaptcha(scene, callback) {
    var state = window.AKSRTCaptchaState;
    var captcha = state && state.scenes ? state.scenes[captchaScene(scene)] : null;
    if (!captcha || typeof captcha.verify !== 'function') {
      callback(true);
      return;
    }
    captcha.verify(function (verified) { callback(verified !== false); });
  }

  function resetCaptcha(scene) {
    var state = window.AKSRTCaptchaState;
    var captcha = state && state.scenes ? state.scenes[captchaScene(scene)] : null;
    if (captcha && typeof captcha.reset === 'function') captcha.reset();
  }

  function sendCode(button) {
    var form = button.closest('form');
    var target = form && form.querySelector('[name="target"]');
    if (!target || !target.value.trim()) {
      showToast('请先填写邮箱或手机号', 'warning');
      return;
    }
    button.disabled = true;
    var payload = formData(form);
    payload.scene = button.dataset.sendCode;
    payload.target = target.value.trim();
    payload.channel = (form.querySelector('[name="channel"]') || {}).value || '';
    verifyCaptcha(payload.scene, function (verified) {
      if (!verified) {
        button.disabled = false;
        showToast('请先完成人机验证', 'warning');
        return;
      }
      payload = formData(form);
      payload.scene = button.dataset.sendCode;
      payload.target = target.value.trim();
      payload.channel = (form.querySelector('[name="channel"]') || {}).value || '';
      request('code', payload).then(function (result) {
        showToast(result.message || '验证码已发送', 'success');
        startCountdown(button, result.countdown || 60);
      }).catch(function (error) {
        button.disabled = false;
        showToast(error.message, 'danger');
      }).finally(function () {
        resetCaptcha(payload.scene);
      });
    });
  }

  function submit(form) {
    var action = form.dataset.authForm;
    var payload = formData(form);
    if (action === 'register' && payload.channel !== 'phone') {
      payload.user_email = payload.target;
    }
    setBusy(form, true);
    request(action, payload).then(function (result) {
      showToast(result.message || '操作成功', 'success');
      if (result.redirect) window.setTimeout(function () { window.location.assign(result.redirect); }, 350);
    }).catch(function (error) {
      showToast(error.message, 'danger');
      setBusy(form, false);
    });
  }

  function toggleLoginMode(root, button) {
    var password = root.querySelector('[data-auth-password-fields]');
    var code = root.querySelector('[data-auth-code-fields]');
    if (!password || !code) return;
    var showCode = code.hidden;
    code.hidden = !showCode;
    password.hidden = showCode;
    button.textContent = showCode ? '使用账号密码登录' : '使用验证码登录';
  }

  function initRoot(root) {
    root.querySelectorAll('input').forEach(function (input) {
      if (!input.hasAttribute('placeholder')) input.setAttribute('placeholder', ' ');
    });
		root.querySelectorAll('form').forEach(function (form) { form.noValidate = true; });
		var initial = root.dataset.initialTab || 'signin';
		if (initial === 'oauth' && window.matchMedia && window.matchMedia('(max-width: 767px)').matches) initial = 'signin';
		activate(root, initial, false);
    root.addEventListener('click', function (event) {
      var tab = event.target.closest('[data-auth-tab]');
      if (tab) { event.preventDefault(); activate(root, tab.dataset.authTab, true); return; }
      var password = event.target.closest('[data-password-show]');
      if (password) {
        var input = password.closest('.floating-input').querySelector('input');
        input.type = input.type === 'password' ? 'text' : 'password';
        password.querySelector('i').className = input.type === 'password' ? 'fa fas fa-eye' : 'fa fas fa-eye-slash';
        return;
      }
      var send = event.target.closest('[data-send-code]');
      if (send) { event.preventDefault(); sendCode(send); return; }
      var mode = event.target.closest('[data-login-mode]');
      if (mode) { event.preventDefault(); toggleLoginMode(root, mode); }
			var refreshQr = event.target.closest('[data-auth-refresh-qr]');
			if (refreshQr) { event.preventDefault(); loadQr(root); }
    });
    root.addEventListener('submit', function (event) {
		var qrForm = event.target.closest('[data-aksrt-weixingzh-code]');
		if (qrForm) {
			event.preventDefault();
			if (validateForm(qrForm)) submitQrCode(qrForm);
			return;
		}
      var form = event.target.closest('[data-auth-form]');
      if (!form) return;
      event.preventDefault();
      if (!validateForm(form)) return;
      submit(form);
    });
  }

	function validateForm(form) {
		if (!form.checkValidity || form.checkValidity()) return true;
		var field = form.querySelector(':invalid');
		showToast((field && field.validationMessage) || '请完整填写表单', 'warning');
		if (field && typeof field.focus === 'function') field.focus();
		return false;
	}

  var modal;
  function authPageUrl(tab, redirect) {
    var routes = config.routes || {};
    var base = tab === 'signup' ? routes.register : routes.login;
    var url = new URL(base || '/sign/', window.location.href);
    url.searchParams.set('tab', tab || 'signin');
    if (redirect) url.searchParams.set('redirect_to', redirect);
    return url.toString();
  }

  function openModal(tab, redirect) {
    if (!modal) {
      window.location.assign(authPageUrl(tab, redirect));
      return;
    }
    modal.classList.add('is-open');
    modal.setAttribute('aria-hidden', 'false');
    document.body.classList.add('auth-modal-open');
    var root = modal.querySelector('[data-aksrt-auth]');
    if (root) {
      activate(root, tab || 'signin', false);
      var redirectInput = root.querySelector('[name="redirect_to"]');
      if (redirectInput && redirect) redirectInput.value = redirect;
    }
  }

  function closeModal(storeDismissal) {
    if (!modal) return;
    modal.classList.remove('is-open');
    modal.setAttribute('aria-hidden', 'true');
    document.body.classList.remove('auth-modal-open');
    if (storeDismissal && Number(modal.dataset.autoExpires) > 0) {
      var until = Date.now() + Number(modal.dataset.autoExpires) * 3600000;
      window.localStorage.setItem('aksrtAuthAutoUntil', String(until));
    }
  }

  function init() {
    document.querySelectorAll('[data-aksrt-auth]').forEach(initRoot);
    modal = document.querySelector('[data-auth-modal]');
    document.addEventListener('click', function (event) {
      var trigger = event.target.closest('[data-aksrt-auth-required], .aksrt-login-trigger, #nav-login-btn, .signin-loader, .signup-loader, .qrcode-signin');
      if (!trigger) return;
      event.preventDefault();
      var tab = trigger.classList.contains('signup-loader') ? 'signup' : (trigger.classList.contains('qrcode-signin') ? 'oauth' : 'signin');
      openModal(tab, trigger.dataset.authRedirect || '');
    });
    if (modal) {
      modal.addEventListener('click', function (event) {
        if (event.target.closest('[data-auth-close]')) closeModal(true);
      });
      document.addEventListener('keydown', function (event) { if (event.key === 'Escape') closeModal(true); });
      if (modal.dataset.auto === '1' && Number(window.localStorage.getItem('aksrtAuthAutoUntil') || 0) < Date.now()) {
        window.setTimeout(function () { openModal(modal.querySelector('[data-aksrt-auth]').dataset.initialTab || 'signin'); }, Math.max(1, Number(modal.dataset.autoWait) || 5) * 1000);
      }
    }
  }

  if (document.readyState === 'loading') document.addEventListener('DOMContentLoaded', init);
  else init();
}());