/**
 * Portal JWT RBAC helpers (mirrors @authportal/shared hasPermission).
 * Format: cfdm:<section>:<read|write|admin>
 */

export type AuthUser = {
  id: string;
  email: string;
  name: string;
  apps: string[];
  permissions: string[];
  isAdmin?: boolean;
};

export function hasPermission(
  granted: readonly string[],
  required: string,
): boolean {
  if (granted.includes(required)) return true;
  const parts = required.split(":");
  if (parts.length !== 3) return false;
  const [app, section, action] = parts;
  if (action === "read") {
    return (
      granted.includes(`${app}:${section}:write`) ||
      granted.includes(`${app}:${section}:admin`)
    );
  }
  if (action === "write") {
    return granted.includes(`${app}:${section}:admin`);
  }
  return false;
}

type Rule = {
  methods: string[];
  match: (path: string) => boolean;
  permission: string;
};

const RULES: Rule[] = [
  {
    methods: ["GET"],
    match: (p) =>
      p.startsWith("/api/v1/domains") ||
      p.startsWith("/api/v1/domain-monitors") ||
      p === "/api/v1/domain-monitors",
    permission: "cfdm:domains:read",
  },
  {
    methods: ["POST", "PUT", "PATCH", "DELETE"],
    match: (p) =>
      p.startsWith("/api/v1/domains") ||
      p.startsWith("/api/v1/domain-monitors"),
    permission: "cfdm:domains:write",
  },
  {
    methods: ["GET"],
    match: (p) =>
      p.startsWith("/api/v1/dns") || p.startsWith("/api/v1/subdomains"),
    permission: "cfdm:dns:read",
  },
  {
    methods: ["POST", "PUT", "PATCH", "DELETE"],
    match: (p) =>
      p.startsWith("/api/v1/dns") || p.startsWith("/api/v1/subdomains"),
    permission: "cfdm:dns:write",
  },
  {
    methods: ["GET"],
    match: (p) => p.startsWith("/api/v1/certificates"),
    permission: "cfdm:certificates:read",
  },
  {
    methods: ["POST", "PUT", "PATCH", "DELETE"],
    match: (p) => p.startsWith("/api/v1/certificates"),
    permission: "cfdm:certificates:write",
  },
  {
    methods: ["GET"],
    match: (p) =>
      p.startsWith("/api/v1/groups") ||
      p.startsWith("/api/v1/service-groups"),
    permission: "cfdm:groups:read",
  },
  {
    methods: ["POST", "PUT", "PATCH", "DELETE"],
    match: (p) =>
      p.startsWith("/api/v1/groups") ||
      p.startsWith("/api/v1/service-groups"),
    permission: "cfdm:groups:write",
  },
  {
    methods: ["GET"],
    match: (p) =>
      p.startsWith("/api/v1/services") ||
      p.startsWith("/api/v1/service-bindings") ||
      p.startsWith("/api/v1/health-checks") ||
      p === "/api/v1/ops-summary",
    permission: "cfdm:services:read",
  },
  {
    methods: ["POST", "PUT", "PATCH", "DELETE"],
    match: (p) =>
      p.startsWith("/api/v1/services") ||
      p.startsWith("/api/v1/service-bindings") ||
      p.startsWith("/api/v1/health-checks"),
    permission: "cfdm:services:write",
  },
  {
    methods: ["GET", "POST"],
    match: (p) => p.startsWith("/api/v1/sync"),
    permission: "cfdm:domains:write",
  },
  {
    methods: ["GET", "POST", "PUT", "PATCH", "DELETE"],
    match: (p) =>
      p.startsWith("/api/v1/settings") ||
      p.startsWith("/api/v1/notifications") ||
      p.startsWith("/api/v1/health-check"),
    permission: "cfdm:settings:admin",
  },
  {
    methods: ["GET"],
    match: (p) => p.startsWith("/api/v1/audit"),
    permission: "cfdm:settings:admin",
  },
];

/** Resolve required permission for method+path, or null if public / unknown. */
export function permissionForRequest(
  method: string,
  path: string,
): string | null {
  const m = method.toUpperCase();
  const pathname = path.split("?")[0] ?? path;
  for (const rule of RULES) {
    if (!rule.methods.includes(m)) continue;
    if (rule.match(pathname)) return rule.permission;
  }
  // Default: any authenticated cfdm user for unmatched /api/v1/*
  if (pathname.startsWith("/api/v1/")) return "cfdm:domains:read";
  return null;
}