const test = require('node:test');
const assert = require('node:assert/strict');
const fs = require('node:fs');
const os = require('node:os');
const path = require('node:path');

const {
  expandHomePath,
  ensureInclude,
  resolveGeneratedSshConfigPath,
  shellQuote,
  sshBlock,
  sshConfigPathWord,
  sshIncludeTarget,
  sshConfigWord,
  upsertBlock,
  windowsCommandWord
} = require('./extension');

test('posix ssh config words use shell quoting', () => {
  assert.equal(
    sshConfigWord('/Users/palav/My App/dosh', 'darwin'),
    "'/Users/palav/My App/dosh'"
  );
  assert.equal(shellQuote("say 'hi'"), "'say '\\''hi'\\'''");
});

test('windows ssh config words use Windows command quoting', () => {
  assert.equal(
    sshConfigWord('C:\\Program Files\\Dosh\\dosh.exe', 'win32'),
    '"C:\\Program Files\\Dosh\\dosh.exe"'
  );
  assert.equal(
    windowsCommandWord('C:\\path\\before"quote'),
    '"C:\\path\\before\\"quote"'
  );
  assert.equal(
    windowsCommandWord('C:\\Program Files\\Dosh\\'),
    '"C:\\Program Files\\Dosh\\\\"'
  );
});

test('ssh block quotes proxy command for the target platform', () => {
  const block = sshBlock({
    alias: 'dosh-work',
    host: 'work host',
    executable: 'C:\\Program Files\\Dosh\\dosh.exe',
    targetHost: '127.0.0.1',
    targetPort: 22,
    doshPort: 50000,
    platform: 'win32'
  });

  assert.match(
    block,
    /ProxyCommand "C:\\Program Files\\Dosh\\dosh\.exe" --dosh-port 50000 proxy-stdio "work host" %h %p/
  );
  assert.doesNotMatch(block, /'C:\\Program Files\\Dosh\\dosh\.exe'/);
});

test('ssh include target stays relative for generated config beside main config', () => {
  assert.equal(
    sshIncludeTarget('/Users/palav/.ssh/config', '/Users/palav/.ssh/config.dosh', 'darwin'),
    'config.dosh'
  );
});

test('ssh include target uses absolute path for custom generated config location', () => {
  assert.equal(
    sshIncludeTarget(
      '/Users/palav/.ssh/config',
      '/Users/palav/Library/Application Support/Dosh/config.dosh',
      'darwin'
    ),
    '"/Users/palav/Library/Application Support/Dosh/config.dosh"'
  );
});

test('ssh include target handles Windows custom generated config paths', () => {
  assert.equal(
    sshIncludeTarget(
      'C:\\Users\\palav\\.ssh\\config',
      'C:\\Users\\palav\\AppData\\Roaming\\Dosh Remote\\config.dosh',
      'win32'
    ),
    '"C:/Users/palav/AppData/Roaming/Dosh Remote/config.dosh"'
  );
  assert.equal(
    sshConfigPathWord('C:\\Users\\palav\\.ssh\\config.dosh', 'win32'),
    'C:/Users/palav/.ssh/config.dosh'
  );
});

test('home-relative generated config paths expand for POSIX and Windows', () => {
  assert.equal(
    expandHomePath('~/Library/Application Support/Dosh/config.dosh', '/Users/palav', 'darwin'),
    '/Users/palav/Library/Application Support/Dosh/config.dosh'
  );
  assert.equal(
    expandHomePath('~\\.ssh\\config.dosh', 'C:\\Users\\palav', 'win32'),
    'C:\\Users\\palav\\.ssh\\config.dosh'
  );
});

test('relative generated config paths resolve beside the main ssh config', () => {
  assert.equal(
    resolveGeneratedSshConfigPath(
      '/Users/palav/.ssh/config',
      'config.dosh',
      '/Users/palav',
      'darwin'
    ),
    '/Users/palav/.ssh/config.dosh'
  );
  assert.equal(
    resolveGeneratedSshConfigPath(
      'C:\\Users\\palav\\.ssh\\config',
      'dosh\\config.dosh',
      'C:\\Users\\palav',
      'win32'
    ),
    'C:\\Users\\palav\\.ssh\\dosh\\config.dosh'
  );
});

test('config writers create missing parent directories', () => {
  const root = fs.mkdtempSync(path.join(os.tmpdir(), 'dosh-vscode-'));
  const mainConfig = path.join(root, 'ssh', 'config');
  const generatedConfig = path.join(root, 'generated', 'config.dosh');

  ensureInclude(mainConfig, '../generated/config.dosh');
  upsertBlock(
    generatedConfig,
    'dosh-test',
    [
      '# BEGIN DOSH dosh-test',
      'Host dosh-test',
      '    ProxyCommand dosh proxy-stdio test %h %p',
      '# END DOSH dosh-test'
    ].join('\n')
  );

  assert.equal(fs.readFileSync(mainConfig, 'utf8'), 'Include ../generated/config.dosh\n');
  assert.match(fs.readFileSync(generatedConfig, 'utf8'), /Host dosh-test/);
});