/**
 * 全局双身份与角色守卫管理模块 (Role Guard Manager)
 * 覆盖四大核心角色：
 * 1. PLAYER: 普通买家/玩家
 * 2. EXPERT: 陪玩大神/接单人
 * 3. HOST: 车队房主/局长
 * 4. ADMIN: 平台管理员/运营端
 */

export const ROLE_TYPES = {
  PLAYER: 'PLAYER', // 发单人端（普通玩家/发起活动/找陪玩）
  EXPERT: 'EXPERT', // 接单人端（大神接单/5km雷达定位/核销）
  HOST: 'HOST',     // 车队房主/局长（发起AA组局/动态调价/解散退款/到场核销）
  ADMIN: 'ADMIN',   // 平台管理员（资质审核/争议仲裁/大盘监管）
};

export const CERT_STATUS = {
  NONE: 0,     // 未提交
  PENDING: 1,  // 待审核
  APPROVED: 2, // 审核通过
  REJECTED: 3, // 驳回
};

const STORAGE_KEY_ROLE = 'PW_CURRENT_USER_ROLE';
const STORAGE_KEY_CERT = 'PW_EXPERT_CERT_STATUS';

export function getExpertCertStatus() {
  try {
    const saved = uni.getStorageSync(STORAGE_KEY_CERT);
    if (saved !== '' && saved !== null && saved !== undefined) {
      return Number(saved);
    }
    return CERT_STATUS.NONE;
  } catch (e) {
    return CERT_STATUS.NONE;
  }
}

export function setExpertCertStatus(status) {
  const target = Number(status);
  try {
    uni.setStorageSync(STORAGE_KEY_CERT, target);
  } catch (e) {
    console.error('Failed to persist cert status', e);
  }
  uni.$emit('cert-status-change', target);
  if (target !== CERT_STATUS.APPROVED) {
    setCurrentRole(ROLE_TYPES.PLAYER);
  }
  return target;
}

export function isExpertCertified() {
  return getExpertCertStatus() === CERT_STATUS.APPROVED;
}

export function canSwitchToRole(targetRole) {
  if (targetRole === ROLE_TYPES.EXPERT) {
    if (!isExpertCertified()) {
      return {
        allowed: false,
        reason: '尚未开通或通过大神实名认证，无法切换至接单模式',
      };
    }
  }
  return { allowed: true };
}

export function getCurrentRole() {
  try {
    const saved = uni.getStorageSync(STORAGE_KEY_ROLE);
    if (saved === ROLE_TYPES.EXPERT) {
      if (isExpertCertified()) {
        return ROLE_TYPES.EXPERT;
      }
      return ROLE_TYPES.PLAYER;
    }
    return ROLE_TYPES.PLAYER;
  } catch (e) {
    return ROLE_TYPES.PLAYER;
  }
}

export function setCurrentRole(role) {
  let target = role === ROLE_TYPES.EXPERT ? ROLE_TYPES.EXPERT : ROLE_TYPES.PLAYER;
  if (target === ROLE_TYPES.EXPERT && !isExpertCertified()) {
    console.warn('[RoleGuard] 未认证大神禁止切换至接单端，已自动降级回玩家端');
    target = ROLE_TYPES.PLAYER;
  }
  try {
    uni.setStorageSync(STORAGE_KEY_ROLE, target);
  } catch (e) {
    console.error('Failed to persist user role', e);
  }
  uni.$emit('role-change', target);
  return target;
}

export function toggleRole() {
  const current = getCurrentRole();
  if (current === ROLE_TYPES.PLAYER) {
    if (!isExpertCertified()) {
      return {
        success: false,
        currentRole: ROLE_TYPES.PLAYER,
        message: '尚未通过大神实名认证，请先提交入驻认证',
      };
    }
    setCurrentRole(ROLE_TYPES.EXPERT);
    return {
      success: true,
      currentRole: ROLE_TYPES.EXPERT,
      message: '已切换至大神接单模式',
    };
  } else {
    setCurrentRole(ROLE_TYPES.PLAYER);
    return {
      success: true,
      currentRole: ROLE_TYPES.PLAYER,
      message: '已切回发单人端',
    };
  }
}

export function isUserLoggedIn() {
  try {
    if (typeof uni === 'undefined') return false;
    const uid = uni.getStorageSync('userId');
    const hasLoggedOut = uni.getStorageSync('user_has_logged_out');
    if (hasLoggedOut === '1') return false;
    return Boolean(uid && String(uid).trim() !== '' && String(uid) !== '0');
  } catch (e) {
    return false;
  }
}

export function isUserBanned() {
  try {
    if (typeof uni === 'undefined') return false;
    const uInfo = uni.getStorageSync('userInfo') || uni.getStorageSync('PW_USER_INFO') || uni.getStorageSync('USER_INFO');
    return Boolean(uInfo && (uInfo.status === '已封禁' || uInfo.status === '封禁'));
  } catch (e) {
    return false;
  }
}

// 必须登录才能访问的受保护业务页面清单 (未登录游客访问自动拦截并跳登录)
export const AUTH_GUARD_PAGES = [
  '/pages/activity/create',          // 发单/发起组队
  '/pages/order/create',             // 确认下单/预约
  '/pages/order/list',               // 我的订单中心
  '/pages/activity/my-ticket',       // 我的活动门票 (4位核销码)
  '/pages/user/recharge',            // 钱包充值
  '/pages/user/withdraw',            // 收益提现
  '/pages/user/withdraw-records',    // 提现审批明细
  '/pages/user/bill-records',        // 账单明细
  '/pages/user/promote',             // 推广赚钱
  '/pages/user/favorites',           // 我的收藏
  '/pages/user/reports',             // 我的举报与维权
  '/pages/user/settings',            // 系统与隐私设置
  '/pages/expert/apply',             // 大神入驻认证
  '/pages/expert/workspace',         // 大神接单工作台
  '/pages/expert/radar',             // 我要接单 (附近5km雷达)
  '/pages/expert/hall'               // 接单大厅
];

export function ensureLoginOrRedirect(redirectUrl = '') {
  if (!isUserLoggedIn()) {
    uni.showToast({
      title: '请先登录账号',
      icon: 'none',
      duration: 1500
    });
    setTimeout(() => {
      const target = redirectUrl ? `/pages/auth/login?redirect=${encodeURIComponent(redirectUrl)}` : '/pages/auth/login';
      uni.navigateTo({
        url: target,
        fail: () => {
          uni.switchTab({ url: '/pages/user/index' });
        }
      });
    }, 350);
    return false;
  }

  if (isUserBanned()) {
    uni.showToast({
      title: '账号已被封禁',
      icon: 'none',
      duration: 2000
    });
    return false;
  }

  return true;
}

// 非大神禁止访问的受保护页面清单
export const EXPERT_GUARD_PAGES = [
  '/pages/expert/workspace',
  '/pages/expert/radar',
  '/pages/expert/hall',
];

export function checkRoleGuard(pageUrl) {
  if (!pageUrl) return { allowed: true };
  const pureUrl = pageUrl.split('?')[0];

  // 1. 登录守卫拦截 (针对未登录游客)
  if (AUTH_GUARD_PAGES.includes(pureUrl)) {
    if (!isUserLoggedIn()) {
      return {
        allowed: false,
        code: 'UNAUTHORIZED',
        redirectUrl: `/pages/auth/login?redirect=${encodeURIComponent(pageUrl)}`,
        message: '该功能需要登录账号，正在为您跳转登录...',
      };
    }
  }

  // 2. 大神身份守卫拦截 (针对已登录但非认证大神的普通玩家)
  if (EXPERT_GUARD_PAGES.includes(pureUrl)) {
    if (!isExpertCertified()) {
      return {
        allowed: false,
        code: 'FORBIDDEN_NOT_EXPERT',
        redirectUrl: '/pages/user/index',
        message: '非大神禁止访问接单工作台与雷达，请先在个人中心完成实名认证',
      };
    }
  }
  return { allowed: true };
}

let guardInstalled = false;
export function installRoleGuard() {
  if (guardInstalled) return;
  guardInstalled = true;
  const routeMethods = ['navigateTo', 'redirectTo', 'reLaunch', 'switchTab'];
  routeMethods.forEach((method) => {
    try {
      if (typeof uni !== 'undefined' && typeof uni.addInterceptor === 'function') {
        uni.addInterceptor(method, {
          invoke(args) {
            if (!args || !args.url) return true;
            const check = checkRoleGuard(args.url);
            if (!check.allowed) {
              uni.showToast({
                title: check.message || '请先登录账号',
                icon: 'none',
                duration: 2000,
              });
              if (check.redirectUrl) {
                setTimeout(() => {
                  uni.navigateTo({
                    url: check.redirectUrl,
                    fail: () => {
                      uni.switchTab({ url: '/pages/user/index' });
                    }
                  });
                }, 350);
              }
              return false;
            }
            return true;
          },
        });
      }
    } catch (e) {}
  });
}

let isRedirectingToExpert = false;
export function safeRedirectToExpertHall(target = '/pages/expert/hall') {
  if (isRedirectingToExpert) {
    return true;
  }
  if (getCurrentRole() === ROLE_TYPES.EXPERT && isExpertCertified()) {
    isRedirectingToExpert = true;
    uni.reLaunch({
      url: target || '/pages/expert/hall',
      complete: () => {
        setTimeout(() => {
          isRedirectingToExpert = false;
        }, 500);
      }
    });
    return true;
  }
  return false;
}