/**
 * Condition Registry for Dynamic Prompt Fragments
 *
 * Each key matches a fragment ID in prompt-fragments.json.
 * The function returns:
 *   - false              → fragment is skipped
 *   - true               → fragment is applied as-is
 *   - Record<string,string> → fragment is applied with {{variable}} interpolation
 *
 * See DYNAMIC-PROMPTS.md for how to add new conditions.
 */

import fs from 'fs';
import { WORKSPACE_DIR } from '../../shared/paths.js';
import { loadConfig } from '../../shared/config.js';
import path from 'path';

export type ConditionResult = false | true | Record<string, string>;

export const conditions: Record<string, () => Promise<ConditionResult>> = {

  /**
   * Shell mode: the workspace renders inside a same-origin iframe under the
   * supervisor's shell page. BLOBY_NO_SHELL=1 is the kill switch back to
   * legacy top-level serving — the iframe note must disappear with it.
   */
  'workspace-iframe-shell': async () => {
    return process.env.BLOBY_NO_SHELL !== '1';
  },

  /**
   * Official Workspace Lock is active.
   * Calls GET http://localhost:{backendPort}/api/lock/status
   * Returns { configured: true, type: "pin"|"password" } when locked.
   */
  'workspace-lock-official': async () => {
    try {
      const cfg = loadConfig();
      const backendPort = cfg.port + 4;
      const res = await fetch(`http://localhost:${backendPort}/api/lock/status`, {
        signal: AbortSignal.timeout(2000),
      });
      if (!res.ok) return false;
      const data = await res.json() as { configured: boolean; type: string | null };
      if (data.configured && data.type) {
        return { lockType: data.type };
      }
      return false;
    } catch {
      // Backend not running or endpoint doesn't exist
      return false;
    }
  },

  /**
   * Custom workspace lock: the lock endpoint doesn't exist (not the official blueprint)
   * AND MEMORY.md contains CUSTOM_WORKSPACE_LOCK=true.
   */
  'workspace-lock-custom': async () => {
    try {
      // First verify the official lock endpoint is NOT available
      const cfg = loadConfig();
      const backendPort = cfg.port + 4;
      const res = await fetch(`http://localhost:${backendPort}/api/lock/status`, {
        signal: AbortSignal.timeout(2000),
      });
      // If the endpoint exists and returns OK, this isn't a custom lock
      if (res.ok) return false;
    } catch {
      // Endpoint doesn't exist — that's expected for custom lock, continue checking
    }

    // Check MEMORY.md for the flag
    try {
      const memoryPath = path.join(WORKSPACE_DIR, 'MEMORY.md');
      const content = fs.readFileSync(memoryPath, 'utf-8');
      if (content.includes('CUSTOM_WORKSPACE_LOCK=true')) {
        return true;
      }
    } catch {}

    return false;
  },

  /**
   * No workspace lock at all — fallback. Always true.
   * (Lowest priority, so it only fires if the others don't match.)
   */
  'workspace-lock-none': async () => {
    return true;
  },
};