// src/rbac/roles.ts
export type Role = 'viewer' | 'analyst' | 'sales_rep' | 'sales_manager' | 'admin';

export interface Permission {
  searchPeople: boolean;       // /mixed_people/api_search (free)
  searchOrganizations: boolean; // /mixed_companies/search (free)
  enrichPerson: boolean;       // /people/match (1 credit)
  bulkEnrich: boolean;         // /people/bulk_match (credits)
  enrichOrg: boolean;          // /organizations/enrich (1 credit)
  manageContacts: boolean;     // /contacts CRUD (master key)
  manageSequences: boolean;    // /emailer_campaigns/* (master key)
  manageDeals: boolean;        // /opportunities/* (master key)
  exportPII: boolean;          // download contacts with email/phone
  viewAnalytics: boolean;      // sequence stats, usage
  manageTeam: boolean;         // create/revoke scoped keys
}

export const PERMISSIONS: Record<Role, Permission> = {
  viewer: {
    searchPeople: true, searchOrganizations: true, enrichPerson: false,
    bulkEnrich: false, enrichOrg: false, manageContacts: false,
    manageSequences: false, manageDeals: false, exportPII: false,
    viewAnalytics: true, manageTeam: false,
  },
  analyst: {
    searchPeople: true, searchOrganizations: true, enrichPerson: true,
    bulkEnrich: false, enrichOrg: true, manageContacts: false,
    manageSequences: false, manageDeals: false, exportPII: false,
    viewAnalytics: true, manageTeam: false,
  },
  sales_rep: {
    searchPeople: true, searchOrganizations: true, enrichPerson: true,
    bulkEnrich: false, enrichOrg: true, manageContacts: true,
    manageSequences: true, manageDeals: true, exportPII: false,
    viewAnalytics: false, manageTeam: false,
  },
  sales_manager: {
    searchPeople: true, searchOrganizations: true, enrichPerson: true,
    bulkEnrich: true, enrichOrg: true, manageContacts: true,
    manageSequences: true, manageDeals: true, exportPII: true,
    viewAnalytics: true, manageTeam: true,
  },
  admin: {
    searchPeople: true, searchOrganizations: true, enrichPerson: true,
    bulkEnrich: true, enrichOrg: true, manageContacts: true,
    manageSequences: true, manageDeals: true, exportPII: true,
    viewAnalytics: true, manageTeam: true,
  },
};

// src/rbac/api-keys.ts
import crypto from 'crypto';

interface ScopedKey {
  key: string;
  teamId: string;
  role: Role;
  createdBy: string;
  createdAt: string;
  expiresAt: string;
}

// In production: store in database
const keys = new Map<string, ScopedKey>();

export function createScopedKey(teamId: string, role: Role, createdBy: string, ttlDays: number = 90): ScopedKey {
  const entry: ScopedKey = {
    key: `ak_${teamId}_${crypto.randomBytes(16).toString('hex')}`,
    teamId, role, createdBy,
    createdAt: new Date().toISOString(),
    expiresAt: new Date(Date.now() + ttlDays * 86400000).toISOString(),
  };
  keys.set(entry.key, entry);
  return entry;
}

export function resolveKey(apiKey: string): ScopedKey | null {
  const entry = keys.get(apiKey);
  if (!entry) return null;
  if (new Date(entry.expiresAt) < new Date()) { keys.delete(apiKey); return null; }
  return entry;
}

export function revokeKey(apiKey: string) { keys.delete(apiKey); }

// src/rbac/middleware.ts
import { Request, Response, NextFunction } from 'express';
import { PERMISSIONS, Permission } from './roles';
import { resolveKey } from './api-keys';

// Map Apollo API paths to required permissions
const ENDPOINT_PERMISSIONS: Record<string, keyof Permission> = {
  '/mixed_people/api_search': 'searchPeople',
  '/mixed_companies/search': 'searchOrganizations',
  '/people/match': 'enrichPerson',
  '/people/bulk_match': 'bulkEnrich',
  '/organizations/enrich': 'enrichOrg',
  '/contacts': 'manageContacts',
  '/emailer_campaigns': 'manageSequences',
  '/opportunities': 'manageDeals',
};

export function requirePermission(action: keyof Permission) {
  return (req: Request, res: Response, next: NextFunction) => {
    const apiKey = req.headers['x-api-key'] as string;
    if (!apiKey) return res.status(401).json({ error: 'x-api-key header required' });

    const key = resolveKey(apiKey);
    if (!key) return res.status(401).json({ error: 'Invalid or expired API key' });

    if (!PERMISSIONS[key.role][action]) {
      return res.status(403).json({
        error: `Permission denied: ${action} requires role upgrade`,
        currentRole: key.role,
      });
    }

    (req as any).apolloCtx = { teamId: key.teamId, role: key.role, user: key.createdBy };
    next();
  };
}

// src/rbac/proxy.ts
import express from 'express';
import axios from 'axios';

const app = express();
app.use(express.json());

// Proxy all /apollo/* requests through RBAC
app.all('/apollo/*', (req, res, next) => {
  const apolloPath = req.path.replace('/apollo', '');
  const matchedKey = Object.keys(ENDPOINT_PERMISSIONS).find((p) => apolloPath.startsWith(p));
  if (!matchedKey) return res.status(404).json({ error: 'Unknown Apollo endpoint' });

  requirePermission(ENDPOINT_PERMISSIONS[matchedKey])(req, res, next);
}, async (req, res) => {
  const apolloPath = req.path.replace('/apollo', '');
  try {
    const response = await axios({
      method: req.method as any,
      url: `https://api.apollo.io/api/v1${apolloPath}`,
      data: req.body,
      params: req.query,
      headers: { 'Content-Type': 'application/json', 'x-api-key': process.env.APOLLO_API_KEY! },
    });
    res.status(response.status).json(response.data);
  } catch (err: any) {
    res.status(err.response?.status ?? 500).json(err.response?.data ?? { error: err.message });
  }
});

// src/rbac/admin.ts
import { Router } from 'express';
import { requirePermission } from './middleware';
import { createScopedKey, revokeKey } from './api-keys';

const admin = Router();
admin.use(requirePermission('manageTeam'));

admin.post('/keys', (req, res) => {
  const { teamId, role, ttlDays } = req.body;
  const ctx = (req as any).apolloCtx;
  const key = createScopedKey(teamId, role, ctx.user, ttlDays);
  res.json({ key: key.key, role: key.role, expiresAt: key.expiresAt });
});

admin.delete('/keys/:key', (req, res) => {
  revokeKey(req.params.key);
  res.json({ revoked: true });
});

admin.get('/usage', async (req, res) => {
  // Check Apollo's usage stats
  const { data } = await axios.get('https://api.apollo.io/api/v1/usage', {
    headers: { 'x-api-key': process.env.APOLLO_API_KEY! },
  });
  res.json(data);
});

export { admin };