'use strict';

var test = require('tap').test,
  path = require('path'),
  os = require('os'),
  exec = require('child_process').exec,
  tmp = require('tmp'),
  fs = require('fs-extra');

function documentation(args, options, callback, parseJSON) {
  if (!callback) {
    callback = options;
    options = {};
  }

  if (!options.cwd) {
    options.cwd = __dirname;
  }

  options.maxBuffer = 1024 * 1024;

  args.unshift(path.join(__dirname, '../bin/documentation.js'));

  exec(args.join(' '), options, function (err, stdout, stderr) {
    if (err) {
      return callback(err, stdout, stderr);
    }
    if (parseJSON === false) {
      callback(err, stdout, stderr);
    } else {
      callback(err, JSON.parse(stdout), stderr);
    }
  });
}

function normalize(result) {
  result.forEach(function (item) {
    item.context.file = '[path]';
  });
  return result;
}

var options = { timeout: 1000 * 120 };

test('documentation binary', function (t) {
  documentation(['build fixture/simple.input.js'], function (err, data) {
    t.error(err);
    t.equal(data.length, 1, 'simple has no dependencies');
    t.end();
  });
}, options);

test('defaults to parsing package.json main', function (t) {
  documentation(['build'], { cwd: path.join(__dirname, '..') }, function (err, data) {
    t.error(err);
    t.ok(data.length, 'we document ourself');
    t.end();
  });
}, options);

test('polyglot mode', function (t) {
  documentation(['build fixture/polyglot/blend.cpp --polyglot'],
    function (err, data) {
      t.ifError(err);
      if (process.env.UPDATE) {
        fs.writeFileSync(
          path.resolve(__dirname,
            'fixture',
            'polyglot/blend.json'), JSON.stringify(normalize(data), null, 2), 'utf8');
      }
      var expected = fs.readFileSync(
        path.resolve(__dirname,
          'fixture',
          'polyglot/blend.json'), 'utf8');
      t.deepEqual(
        normalize(data),
        JSON.parse(expected),
        'parsed C++ file');
      t.end();
    });
}, options);

test('accepts config file', function (t) {
  documentation(['build fixture/sorting/input.js -c fixture/config.json'],
    function (err, data) {
      t.error(err);
      if (process.env.UPDATE) {
        fs.writeFileSync(
          path.resolve(__dirname,
            'fixture',
            'sorting/output.json'), JSON.stringify(normalize(data), null, 2), 'utf8');
      }
      var expected = fs.readFileSync(
        path.resolve(__dirname,
          'fixture',
          'sorting/output.json'), 'utf8');
      t.deepEqual(
        normalize(data),
        JSON.parse(expected),
        'respected sort order from config file');
      t.end();
    });
}, options);

test('--shallow option', function (t) {
  documentation(['build --shallow fixture/internal.input.js'], function (err, data) {
    t.error(err);
    t.equal(data.length, 0, 'should not check dependencies');
    t.end();
  });
}, options);

test('external modules option', function (t) {
  documentation(['build fixture/external.input.js ' +
    '--external=external --external=external/node_modules'], function (err, data) {
    t.ifError(err);
    t.equal(data.length, 2, 'Includes external file');
    t.end();
  });
});

test('extension option', function (t) {
  documentation(['build fixture/extension/index.otherextension ' +
    '--extension=otherextension'], function (err, data) {
    t.ifError(err);
    t.equal(data.length, 1, 'includes a file with an arbitrary extension');
    t.end();
  });
});

test('invalid arguments', function (group) {
  group.test('bad -f option', function (t) {
    documentation(['build -f DOES-NOT-EXIST fixture/internal.input.js'], function (err) {
      t.ok(err, 'returns error');
      t.end();
    });
  }, options);

  group.test('html with no destination', function (t) {
    documentation(['build -f html fixture/internal.input.js'], function (err) {
      t.ok(err.toString()
        .match(/The HTML output mode requires a destination directory set with -o/),
        'needs dest for html');
      t.end();
    });
  }, options);

  group.test('bad command', function (t) {
    documentation(['-f html fixture/internal.input.js'], function (err, stdout, stderr) {
      t.ok(err.code, 'exits nonzero');
      t.ok(stderr.match(/Unknown command/), 'reports unknown command');
      t.end();
    });
  });

  group.end();
});

test('--version', function (t) {
  documentation(['--version'], {}, function (err, output) {
    t.ok(output, 'outputs version');
    t.end();
  }, false);
}, options);

test('lint command', function (group) {

  group.test('generates lint output', function (t) {
    documentation(['lint fixture/lint/lint.input.js'], function (err, data) {
      var output = path.join(__dirname, 'fixture/lint/lint.output.js');
      data = data.toString().split('\n').slice(2).join('\n');
      if (process.env.UPDATE) {
        fs.writeFileSync(output, data);
      }
      t.equal(err.code, 1);
      t.equal(data, fs.readFileSync(output, 'utf8'), 'outputs lint');
      t.end();
    });
  }, options);

  group.test('generates no output on a good file', function (t) {
    documentation(['lint fixture/simple.input.js'], {}, function (err, data) {
      t.equal(err, null);
      t.equal(data, '', 'no output');
      t.end();
    }, false);
  }, options);

  group.test('exposes syntax error on a bad file', function (t) {
    documentation(['lint fixture/bad/syntax.input.js'], {}, function (err, data) {
      t.ok(err.code > 0, 'exits with a > 0 exit code');
      t.end();
    }, false);
  }, options);

  group.end();
});

test('given no files', function (t) {
  documentation(['build'], function (err) {
    t.ok(err.toString()
      .match(/documentation was given no files and was not run in a module directory/),
      'no files given');
    t.end();
  });
}, options);

test('with an invalid command', function (t) {
  documentation(['invalid'], function (err) {
    t.ok(err, 'returns error');
    t.end();
  });
}, options);

test('--access flag', function (t) {
  documentation(['build --shallow fixture/internal.input.js -a public'], {}, function (err, data) {
    t.error(err);
    t.equal(data, '[]');
    t.end();
  }, false);
});

test('--private flag', function (t) {
  documentation(['build fixture/internal.input.js --private'], {}, function (err, data) {
    t.error(err);
    t.ok(data.length > 2, 'outputs docs');
    t.end();
  }, false);
});

test('write to file', function (t) {

  var dst = path.join(os.tmpdir(), (Date.now() + Math.random()).toString());

  documentation(['build --shallow fixture/internal.input.js -o ' + dst], {}, function (err, data) {
    t.error(err);
    t.equal(data, '');
    t.ok(fs.existsSync(dst), 'created file');
    t.end();
  }, false);
}, options);

test('write to html', function (t) {

  var dstDir = path.join(os.tmpdir(), (Date.now() + Math.random()).toString());
  fs.mkdirSync(dstDir);

  documentation(['build --shallow fixture/internal.input.js -f html -o ' + dstDir], {},
    function (err, data) {
      t.error(err);
      t.equal(data, '');
      t.ok(fs.existsSync(path.join(dstDir, 'index.html')), 'created index.html');
      t.end();
    }, false);
}, options);

test('write to html with custom theme', function (t) {

  var dstDir = path.join(os.tmpdir(), (Date.now() + Math.random()).toString());
  fs.mkdirSync(dstDir);

  documentation(['build -t fixture/custom_theme --shallow fixture/internal.input.js -f html -o ' + dstDir], {},
    function (err, data) {
      t.error(err);
      t.equal(data, '');
      t.ok(fs.readFileSync(path.join(dstDir, 'index.html'), 'utf8'), 'Hello world');
      t.end();
    }, false);
}, options);

test('write to html, highlightAuto', function (t) {

  var fixture = 'fixture/auto_lang_hljs/multilanguage.input.js',
    config = 'fixture/auto_lang_hljs/config.yml',
    dstDir = path.join(os.tmpdir(), (Date.now() + Math.random()).toString());

  fs.mkdirSync(dstDir);

  documentation(['build --shallow ' + fixture + ' -c ' + config + ' -f html -o ' + dstDir], {},
    function (err) {
      t.ifErr(err);
      var result = fs.readFileSync(path.join(dstDir, 'index.html'), 'utf8');
      t.ok(result.indexOf('<span class="hljs-number">42</span>') > 0,
        'javascript is recognized by highlightjs');
      t.ok(result.indexOf('<span class="hljs-selector-attr">[data-foo]</span>') > 0,
        'css is recognized by highlightjs');
      t.ok(result.indexOf('<span class="hljs-attr">data-foo</span>') > 0,
        'html is recognized by highlightjs');
      t.end();
    }, false);
}, options);

test('fatal error', function (t) {

  documentation(['build --shallow fixture/bad/syntax.input.js'], {},
    function (err) {
      t.ok(err.toString().match(/Unexpected token/), 'reports syntax error');
      t.end();
    }, false);
}, options);