import { getTenant, getTenants } from './api';
import { ActivityStatus, Tenant } from '../types';
import { setActivationPending } from './userSyncService';
import { encodeHashIdSync, isAlreadyHashId } from './toolsService';

export interface TenantLockoutResult {
  isActive: boolean;
  tenant: Tenant | null;
  errorMessage?: string;
  statusCode?: number;
}

let cachedTenantLockout: {
  key: string;
  result: TenantLockoutResult;
  timestamp: number;
} | null = null;
const LOCKOUT_CACHE_TTL_MS = 60 * 1000;

export function clearTenantLockoutCache(): void {
  cachedTenantLockout = null;
}

export function isStatusActive(status: any): boolean {
  if (status === undefined || status === null || status === '') {
    return false;
  }
  if (status === ActivityStatus.Active || status === 1 || status === '1') {
    return true;
  }
  if (typeof status === 'string' && status.trim().toLowerCase() === 'active') {
    return true;
  }
  if (status === true) {
    return true;
  }
  return false;
}

export function getStatusLabel(status: any): string {
  if (status === ActivityStatus.Active || status === 1 || String(status).toLowerCase() === 'active') {
    return 'Active';
  }
  if (status === ActivityStatus.Inactive || status === 2 || String(status).toLowerCase() === 'inactive') {
    return 'Inactive';
  }
  if (status === ActivityStatus.Disabled || status === 3 || String(status).toLowerCase() === 'disabled') {
    return 'Disabled';
  }
  if (String(status).toLowerCase() === 'suspended') {
    return 'Suspended';
  }
  if (status === 0 || String(status).toLowerCase() === 'pending') {
    return 'Pending';
  }
  if (status !== undefined && status !== null && status !== '') {
    return String(status);
  }
  return 'Not Specified';
}

function isValidHashableOrHashedTenantId(val: unknown): val is number | string {
  if (val === undefined || val === null || val === '') return false;
  if (typeof val === 'number') {
    return !isNaN(val) && isFinite(val) && val > 0;
  }
  if (typeof val === 'string') {
    const trimmed = val.trim();
    if (!trimmed) return false;
    if (/^\d+$/.test(trimmed)) {
      return parseInt(trimmed, 10) > 0;
    }
    return isAlreadyHashId(trimmed);
  }
  return false;
}

export async function verifyTenantLockout(
  tenantId?: number | string | null,
  tenantClaim?: string | null,
  forceRefresh = false
): Promise<TenantLockoutResult> {
  // Resolve a valid numeric ID or HashId to avoid passing plain-text tenant names to /v1/api/governance/tenants/{id}
  let candidateId: number | string | null = null;
  if (isValidHashableOrHashedTenantId(tenantId)) {
    candidateId = tenantId;
  } else if (isValidHashableOrHashedTenantId(tenantClaim)) {
    candidateId = tenantClaim;
  }

  const cacheKey = String(candidateId ?? tenantClaim ?? 'default-1').trim().toLowerCase();
  if (!forceRefresh && cachedTenantLockout && cachedTenantLockout.key === cacheKey) {
    if (
      cachedTenantLockout.result.isActive &&
      Date.now() - cachedTenantLockout.timestamp < LOCKOUT_CACHE_TTL_MS
    ) {
      return cachedTenantLockout.result;
    }
  }

  let tenantRes: Tenant | null = null;
  let lastError: any = null;

  // 1. If we have a valid numeric tenantId or HashId, encode it via HashIds and call GET /v1/api/governance/tenants/{hashedId}
  if (candidateId !== null) {
    try {
      const hashedId = encodeHashIdSync(candidateId);
      tenantRes = await getTenant(hashedId || candidateId);
    } catch (err: any) {
      lastError = err;
      tenantRes = null;
    }
  }

  // 2. If tenant lookup by ID wasn't possible or didn't resolve, resolve via getTenants() (matching tenantClaim name if provided)
  if (!tenantRes) {
    try {
      const allTenants = await getTenants();
      if (Array.isArray(allTenants) && allTenants.length > 0) {
        const claimStr = tenantClaim ? String(tenantClaim).trim().toLowerCase() : '';
        const matched = claimStr
          ? allTenants.find(
              (t) =>
                (t.name && t.name.trim().toLowerCase() === claimStr) ||
                String(t.id).toLowerCase() === claimStr ||
                encodeHashIdSync(t.id).toLowerCase() === claimStr
            )
          : null;

        const targetTenant = matched || allTenants.find((t) => isStatusActive((t as any).status ?? (t as any).Status)) || allTenants[0];
        if (targetTenant && targetTenant.id !== undefined && targetTenant.id !== null) {
          try {
            const hashedTargetId = encodeHashIdSync(targetTenant.id);
            tenantRes = await getTenant(hashedTargetId || targetTenant.id);
            lastError = null;
          } catch {
            tenantRes = targetTenant;
            lastError = null;
          }
        }
      }
    } catch (err: any) {
      if (!lastError) lastError = err;
    }
  }

  // 3. Final fallback: query default primary tenant ID 1 encoded as a HashId (matching ConsoleUI)
  if (!tenantRes && candidateId !== 1 && candidateId !== '1') {
    try {
      const hashedDefaultId = encodeHashIdSync(1);
      tenantRes = await getTenant(hashedDefaultId);
      lastError = null;
    } catch (err: any) {
      if (!lastError) lastError = err;
      tenantRes = null;
    }
  }

  if (!tenantRes || (typeof tenantRes === 'object' && Object.keys(tenantRes).length === 0)) {
    let serverMsg =
      lastError?.response?.data?.detail ||
      lastError?.response?.data?.message ||
      lastError?.message ||
      'No tenant record returned';

    if (typeof serverMsg === 'string') {
      if (/^network\s*error$/i.test(serverMsg.trim())) {
        serverMsg = 'Permission Check';
      } else {
        serverMsg = serverMsg.replace(/network\s*error/gi, 'Permission Check');
      }
    }

    const errorMsg = `Tenant record could not be retrieved (${serverMsg}). Account is locked out.`;
    setActivationPending(true, errorMsg);
    return {
      isActive: false,
      tenant: null,
      errorMessage: errorMsg,
      statusCode: lastError?.response?.status,
    };
  }

  const tenantObj: Tenant = (tenantRes as any)?.data || (tenantRes as any)?.result || tenantRes;

  const rawStatus =
    (tenantObj as any)?.status ??
    (tenantObj as any)?.Status ??
    (tenantObj as any)?.activityStatus ??
    (tenantObj as any)?.ActivityStatus;

  const active = isStatusActive(rawStatus);

  if (!active) {
    const statusLabel = getStatusLabel(rawStatus);
    const tenantName = tenantObj?.name || String(candidateId ?? tenantClaim ?? '1');
    const errorMsg = `Tenant account "${tenantName}" is not Active (Status: ${statusLabel}). Account is locked out.`;
    setActivationPending(true, errorMsg);
    return {
      isActive: false,
      tenant: tenantObj,
      errorMessage: errorMsg,
    };
  }

  setActivationPending(false);

  const successResult: TenantLockoutResult = {
    isActive: true,
    tenant: tenantObj,
  };
  cachedTenantLockout = {
    key: cacheKey,
    result: successResult,
    timestamp: Date.now(),
  };
  return successResult;
}