import type { FastifyInstance, FastifyReply, FastifyRequest } from 'fastify';
import { z } from 'zod';
import type { AuthRepository } from '../auth/auth-repository.js';
import { authenticateAccessToken } from '../auth/authenticate.js';
import type { AccessProfile } from '../auth/rbac-repository.js';
import type { ManagementActor } from '../auth/user-management-repository.js';
import { PlatformAdminError, type PlatformAdminRepository } from '../tenancy/platform-admin-repository.js';

const id = z.string().regex(/^[1-9]\d{0,19}$/);
const configSchema = z.object({
  brandName: z.string().trim().min(1).max(128),
  logoUrl: z.string().trim().max(512).default(''),
  themeColor: z.string().regex(/^#[0-9A-Fa-f]{6}$/),
  servicePhone: z.string().trim().max(32).default(''),
  franchisePhone: z.string().trim().max(32).default(''),
  shareTitle: z.string().trim().max(128).default(''),
  shareImageUrl: z.string().trim().max(512).default(''),
  defaultStoreId: id.nullable().default(null),
  extraConfig: z.record(z.unknown()).default({}),
  bindingStatus: z.enum(['ACTIVE', 'DISABLED']),
  isDefault: z.boolean()
});
const bindSchema = z.object({
  appId: z.string().regex(/^[A-Za-z0-9_-]{6,64}$/),
  appName: z.string().trim().min(1).max(128),
  appStatus: z.enum(['ACTIVE', 'DISABLED']),
  config: configSchema
});

export interface PlatformManagementRouteOptions {
  repository: Pick<PlatformAdminRepository, 'listTenantApps' | 'updateTenantConfig' | 'bindApplication'>;
  authRepository: Pick<AuthRepository, 'validateSession'>;
  accessControl: { getAccessProfile(tenantId: string, userId: string): Promise<AccessProfile> };
  jwtSecret: string;
}

export async function registerPlatformManagementRoutes(app: FastifyInstance, options: PlatformManagementRouteOptions) {
  app.get('/admin-api/platform-apps', async (request, reply) => {
    const actor = await requireActor(request, reply, options, false);
    if (!actor) return;
    return handle(reply, request.traceId, async () => ({
      code: 0, data: await options.repository.listTenantApps(actor.tenantId), traceId: request.traceId
    }));
  });
  app.put('/admin-api/platform-apps/:id/config', async (request, reply) => {
    const actor = await requireActor(request, reply, options, false);
    const params = z.object({ id }).safeParse(request.params);
    const body = configSchema.safeParse(request.body);
    if (!actor) return;
    if (!params.success || !body.success) return invalid(reply, request.traceId);
    return handle(reply, request.traceId, async () => ({
      code: 0,
      data: await options.repository.updateTenantConfig(actor, params.data.id, body.data),
      traceId: request.traceId
    }));
  });
  app.post('/admin-api/platform-apps/bind', async (request, reply) => {
    const actor = await requireActor(request, reply, options, true);
    const body = bindSchema.safeParse(request.body);
    if (!actor) return;
    if (!body.success) return invalid(reply, request.traceId);
    return handle(reply, request.traceId, async () => reply.status(201).send({
      code: 0, data: await options.repository.bindApplication(actor, body.data), traceId: request.traceId
    }));
  });
}

async function requireActor(request: FastifyRequest, reply: FastifyReply, options: PlatformManagementRouteOptions, platformOnly: boolean): Promise<ManagementActor | null> {
  const auth = await authenticateAccessToken(request.headers.authorization, options.authRepository, options.jwtSecret);
  if (!auth) { reply.status(401).send({ code: 'AUTH_SESSION_INVALID', message: 'Authentication required.', traceId: request.traceId }); return null; }
  const access = await options.accessControl.getAccessProfile(auth.session.tenantId, auth.session.user.id);
  const platform = access.roles.includes('PLATFORM_ADMIN') || access.capabilities.includes('platform.manage');
  if ((platformOnly && !platform) || (!platformOnly && !platform && !access.capabilities.includes('tenant.manage'))) {
    reply.status(403).send({ code: platformOnly ? 'PLATFORM_MANAGEMENT_FORBIDDEN' : 'TENANT_MANAGEMENT_FORBIDDEN', message: 'Management permission is required.', traceId: request.traceId });
    return null;
  }
  return { tenantId: auth.session.tenantId, userId: auth.session.user.id, access, traceId: request.traceId, ip: request.ip, userAgent: request.headers['user-agent'] ?? '' };
}

async function handle(reply: FastifyReply, traceId: string, work: () => Promise<unknown>) {
  try { return await work(); }
  catch (error) {
    if (!(error instanceof PlatformAdminError)) throw error;
    const missing = error.code.endsWith('_NOT_FOUND');
    return reply.status(missing ? 404 : 400).send({ code: error.code, message: 'The platform application operation is invalid.', traceId });
  }
}

function invalid(reply: FastifyReply, traceId: string) {
  return reply.status(400).send({ code: 'INVALID_PLATFORM_APP_REQUEST', message: 'The platform application request is invalid.', traceId });
}