import type {PluginGameSourceDraft, XLibraryPlugin} from '@xlibrary/plugin-sdk';

function getExternalId(input: {externalId?: string; url?: string}): string {
  if (input.externalId?.trim()) return input.externalId.trim();

  const url = input.url ? new URL(input.url) : undefined;
  const slug = url?.pathname.split('/').filter(Boolean).at(-1);
  if (!slug) throw new Error('A game id or HTTPS URL is required');
  return decodeURIComponent(slug);
}

function createDraft(input: {externalId?: string; url?: string; name?: string}): PluginGameSourceDraft {
  const externalId = getExternalId(input);
  return {
    externalId,
    canonicalUrl: input.url || `https://catalog.example/games/${encodeURIComponent(externalId)}`,
    name: input.name || `Demo Game (${externalId})`,
    tags: [],
    screenshotUrls: [],
    isPartial: false,
    missingFields: [],
    metadata: {},
  };
}

const plugin: XLibraryPlugin = {
  invoke(invocation) {
    if (invocation.method === 'game-sources.search') {
      return {
        candidates: [{
          identity: {
            externalId: 'demo-game',
            canonicalUrl: 'https://catalog.example/games/demo-game',
          },
          title: `Demo result for ${invocation.payload.query}`,
          summary: 'Replace this deterministic result with your catalog request.',
        }],
      };
    }

    if (invocation.method === 'game-sources.resolve') {
      return createDraft(invocation.payload);
    }

    throw new Error(`Unsupported plugin method: ${invocation.method}`);
  },
};

export default plugin;