/**
 * Copyright (c) 2026 Niolla
 * All rights reserved.
 *
 * This source code is proprietary and confidential.
 * Unauthorized copying, modification, distribution, or use
 * of this file, via any medium, is strictly prohibited.
 */

// app/middleware/permission.middleware.js

const hasPermission = (userPermissions, requiredPermission) => {
  return userPermissions.some(p => {
    if (p === requiredPermission) return true;

    // wildcard support
    if (p.endsWith(".*")) {
      const prefix = p.slice(0, -2);
      return requiredPermission.startsWith(prefix);
    }

    return false;
  });
};

const methodToAction = {
  GET: "view",
  POST: "create",
  PUT: "update",
  PATCH: "update",
  DELETE: "delete"
};

const checkPermission = (baseOrFull, options = {}) => {
  return (req, res, next) => {
    if (!req.user) {
      return res.status(401).json({
        success: false,
        message: "Unauthorized"
      });
    }

    // admin bypass
    if (req.user.accountType === "admin") {
      return next();
    }

    if (typeof baseOrFull !== "string") {
      return res.status(500).json({
        success: false,
        message: "Permission must be a string"
      });
    }

    let requiredPermission;

    if (options.custom) {
      requiredPermission = baseOrFull;
    } else {
      const action = methodToAction[req.method];

      if (!action) {
        return res.status(500).json({
          success: false,
          message: "Unknown HTTP method"
        });
      }

      requiredPermission = `${baseOrFull}.${action}`;
    }

    const userPermissions = req.user.permissions || [];

    const hasPermission =
      userPermissions.includes(requiredPermission) ||
      userPermissions.includes(`${baseOrFull}.*`);

    if (!hasPermission) {
      return res.status(403).json({
        success: false,
        message: `Forbidden - Missing ${requiredPermission}`
      });
    }

    next();
  };
};

const authorizedAccountType = (allowedTypes) => {
  return (req, res, next) => {
    if (!req.user || !allowedTypes.includes(req.user.accountType)) {
      return res
        .status(403)
        .json({ success: false, message: "Forbidden" });
    }
    next();
  }
}

module.exports = {authorizedAccountType, checkPermission};