/**
 * 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',
    };
  }
}

// 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];
  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 || '非大神禁止访问接单页面',
                icon: 'none',
                duration: 2000,
              });
              return false;
            }
            return true;
          },
        });
      }
    } catch (e) {}
  });
}