import { existsSync, lstatSync, symlinkSync, unlinkSync } from 'fs';
import { resolve } from 'path';

const manifest = await Bun.file('manifest.json').json();
const pluginId: string = manifest.id;

const vaultPath = process.argv[2] || process.env.OBSIDIAN_VAULT;

if (!vaultPath) {
  console.error(
    'Usage: bun run scripts/symlink-to-vault.ts <vault-path>\n' + '  or set OBSIDIAN_VAULT environment variable',
  );
  process.exit(1);
}

const resolvedVault = resolve(vaultPath);
const pluginsDir = resolve(resolvedVault, '.obsidian', 'plugins');
const targetDir = resolve(pluginsDir, pluginId);
const distDir = resolve(import.meta.dir, '..', 'dist');

if (!existsSync(pluginsDir)) {
  console.error(`Invalid vault path: ${resolvedVault}`);
  console.error(`.obsidian/plugins directory not found at ${pluginsDir}`);
  process.exit(1);
}

if (!existsSync(distDir)) {
  console.error(`Build not found: run 'bun run build' first`);
  process.exit(1);
}

if (existsSync(targetDir)) {
  if (lstatSync(targetDir).isSymbolicLink()) {
    const link = lstatSync(targetDir);
    const linkTarget = resolve(pluginsDir, link.path);

    if (linkTarget !== distDir) {
      unlinkSync(targetDir);
      symlinkSync(distDir, targetDir);
      console.log(`Updated symlink: ${targetDir} -> ${distDir}`);
    } else {
      console.log(`Symlink already correct: ${targetDir} -> ${distDir}`);
    }
  } else {
    console.error(`${targetDir} exists and is not a symlink. Refusing to remove for safety.`);
    process.exit(1);
  }
} else {
  symlinkSync(distDir, targetDir);
  console.log(`Created symlink: ${targetDir} -> ${distDir}`);
}