import { strict as assert } from 'node:assert';
import { readdir, readFile } from 'node:fs/promises';
import path from 'node:path';
import { describe, it } from 'node:test';
import { parseSiteConfig } from '../src/config.ts';

const root = path.join(import.meta.dirname, '..');

/** The inventory decides which Sites exist; the playbook names the vars file. */
async function inventory(): Promise<{ name: string; varFile: string }[]> {
  const text = await readFile(path.join(root, 'ansible', 'hosts'), 'utf8');
  const inMenus = text.split(/^\[/m).find((block) => block.startsWith('menus]')) ?? '';
  return inMenus
    .split('\n')
    .slice(1)
    .map((line) => line.trim())
    .filter((line) => line !== '' && !line.startsWith('#'))
    .map((line) => {
      const [name, ...vars] = line.split(/\s+/);
      const varFile = vars.find((entry) => entry.startsWith('var_file=')) ?? '';
      return { name: name!, varFile: varFile.replace('var_file=', '') };
    });
}

describe('every Site in the inventory is complete', () => {
  it('has a config file, a vars file, and a config that parses', async () => {
    const sites = await inventory();
    assert.ok(sites.length >= 3, `expected the three Sites, found ${sites.length}`);

    for (const { name, varFile } of sites) {
      assert.notEqual(varFile, '', `${name} names no var_file`);

      const configPath = path.join(root, 'config', `${name}.site.json`);
      const raw = JSON.parse(await readFile(configPath, 'utf8'));
      const config = parseSiteConfig(raw);

      assert.equal(
        config.site.startsWith('menu.'),
        true,
        `${name}: site should be a menu hostname`,
      );
      assert.ok(config.sections.length > 0, `${name} seeds no categories`);
      assert.match(
        config.theme.steel,
        /^#[0-9a-f]{6}$/i,
        `${name}: the theme should carry real colours`,
      );

      const varsRaw = await readFile(path.join(root, 'ansible', varFile), 'utf8');
      // Each vars file only needs to say where the Site runs; the templating is
      // quoted, which is what a first deploy got wrong.
      assert.match(varsRaw, /^title: /m, `${name}: ${varFile} has no title`);
      assert.match(varsRaw, /^host: 'menu\.\{\{ title \}\}'/m, `${name}: host is not quoted`);
      assert.match(varsRaw, /^host_directory: /m, `${name}: no host_directory`);
    }
  });

  it('leaves no Site config without an inventory entry', async () => {
    const sites = new Set((await inventory()).map((site) => site.name));
    const files = await readdir(path.join(root, 'config'));
    for (const file of files.filter((entry) => entry.endsWith('.site.json'))) {
      const name = file.replace('.site.json', '');
      assert.ok(sites.has(name), `config/${file} belongs to no Site in the inventory`);
    }
  });
});