import { Router } from "express";

const router = Router();

// Feature configurations by tier
const FEATURE_CONFIGS = {
  none: {
    tier: 'none',
    pages: {
      examples: 'off',
      documentation: 'off',
      pricing: 'off',
      vrExperience: 'off',
    },
    features: {
      createDiagram: 'off',
      createFromTemplate: 'off',
      manageDiagrams: 'off',
      shareCollaborate: 'off',
      privateDesigns: 'off',
      encryptedDesigns: 'off',
      editData: 'off',
      config: 'off',
      enterImmersive: 'off',
      launchMetaQuest: 'off',
    },
    limits: {
      maxDiagrams: 0,
      maxCollaborators: 0,
      storageQuotaMB: 0,
    },
  },
  free: {
    tier: 'free',
    pages: {
      examples: 'on',
      documentation: 'on',
      pricing: 'on',
      vrExperience: 'on',
    },
    features: {
      createDiagram: 'on',
      createFromTemplate: 'coming-soon',
      manageDiagrams: 'on',
      shareCollaborate: 'on',
      privateDesigns: 'coming-soon',
      encryptedDesigns: 'pro',
      editData: 'on',
      config: 'on',
      enterImmersive: 'on',
      launchMetaQuest: 'on',
    },
    limits: {
      maxDiagrams: 6,
      maxCollaborators: 0,
      storageQuotaMB: 100,
    },
  },
  basic: {
    tier: 'basic',
    pages: {
      examples: 'on',
      documentation: 'on',
      pricing: 'on',
      vrExperience: 'on',
    },
    features: {
      createDiagram: 'on',
      createFromTemplate: 'on',
      manageDiagrams: 'on',
      shareCollaborate: 'on',
      privateDesigns: 'on',
      encryptedDesigns: 'pro',
      editData: 'on',
      config: 'on',
      enterImmersive: 'on',
      launchMetaQuest: 'on',
    },
    limits: {
      maxDiagrams: 25,
      maxCollaborators: 0,
      storageQuotaMB: 500,
    },
  },
  pro: {
    tier: 'pro',
    pages: {
      examples: 'on',
      documentation: 'on',
      pricing: 'on',
      vrExperience: 'on',
    },
    features: {
      createDiagram: 'on',
      createFromTemplate: 'on',
      manageDiagrams: 'on',
      shareCollaborate: 'on',
      privateDesigns: 'on',
      encryptedDesigns: 'on',
      editData: 'on',
      config: 'on',
      enterImmersive: 'on',
      launchMetaQuest: 'on',
    },
    limits: {
      maxDiagrams: -1,
      maxCollaborators: -1,
      storageQuotaMB: -1,
    },
  },
};

// Default tier for authenticated users without a specific tier
const DEFAULT_TIER = 'basic';

/**
 * GET /api/user/features
 * Returns feature configuration for the current user
 *
 * Query params:
 *   - tier: Override tier for testing (e.g., ?tier=pro)
 */
router.get("/features", (req, res) => {
  // Allow tier override via query param for testing
  const tierOverride = req.query.tier;

  // TODO: In production, determine tier from JWT token or user database
  // For now, use query param override or default to 'basic'
  const tier = tierOverride && FEATURE_CONFIGS[tierOverride]
    ? tierOverride
    : DEFAULT_TIER;

  const config = FEATURE_CONFIGS[tier];

  console.log(`[User] Returning feature config for tier: ${tier}`);
  res.json(config);
});

/**
 * GET /api/user/features/:tier
 * Returns feature configuration for a specific tier (for testing/admin)
 */
router.get("/features/:tier", (req, res) => {
  const { tier } = req.params;
  const config = FEATURE_CONFIGS[tier];

  if (!config) {
    return res.status(404).json({ error: `Unknown tier: ${tier}` });
  }

  console.log(`[User] Returning feature config for tier: ${tier}`);
  res.json(config);
});

export default router;