/**
 * REST helpers for the Agent Ready page.
 * Routes live under llm-analytics/v1/agent-audit/* (class-agent-audit.php).
 */
import type { AgentReadySettings, AuditResult, FixResponse } from './types';

interface WpApiSettings {
  root?: string;
  nonce?: string;
}

function apiBase(): { root: string; nonce: string } {
  const settings = (window as unknown as { wpApiSettings?: WpApiSettings }).wpApiSettings;
  return {
    root: (settings?.root ?? '/wp-json/').replace(/\/$/, '') + '/',
    nonce: settings?.nonce ?? '',
  };
}

async function request<T>(path: string, init?: RequestInit): Promise<T> {
  const { root, nonce } = apiBase();
  const response = await fetch(root + 'llm-analytics/v1' + path, {
    ...init,
    headers: {
      'Content-Type': 'application/json',
      'X-WP-Nonce': nonce,
      ...(init?.headers ?? {}),
    },
  });
  const data = (await response.json().catch(() => null)) as
    | (T & { message?: string })
    | null;
  if (!response.ok) {
    throw new Error(data?.message || `Request failed (HTTP ${response.status})`);
  }
  return data as T;
}

export function fetchResult(): Promise<AuditResult & { has_result: boolean }> {
  return request('/agent-audit/result');
}

export function runAudit(): Promise<AuditResult> {
  return request('/agent-audit/run', { method: 'POST' });
}

export function applyFix(checkId: string): Promise<FixResponse> {
  return request('/agent-audit/fix', {
    method: 'POST',
    body: JSON.stringify({ check_id: checkId }),
  });
}

export function fetchSettings(): Promise<AgentReadySettings> {
  return request('/agent-audit/settings');
}

export function saveSettings(payload: {
  toggles?: Record<string, boolean>;
  content_signal?: Partial<AgentReadySettings['content_signal']>;
  webmcp_add_to_cart?: boolean;
  /* Phase F sub-options (FA-2/5/6/7). */
  markdown_conneg?: boolean;
  restore_feed_links?: boolean;
  canonical_fill?: boolean;
  meta_description_fill?: boolean;
  security_headers?: Partial<AgentReadySettings['security_headers']>;
}): Promise<AgentReadySettings> {
  return request('/agent-audit/settings', {
    method: 'POST',
    body: JSON.stringify(payload),
  });
}