// Based on CoffeeScript by andrewschaaf on github

// TODO:
// - past and future dates, especially < 1900 and > 2100
// - locales
// - look for edge cases

var assert = require('assert')
  , lib = require('./../lib')

    // Tue, 07 Jun 2011 18:51:45 GMT
  , Time = new Date(1307472705067)

/// check exports

assert.fn = function(value, msg) {
  assert.equal('function', typeof value, msg)
}

assert.fn(lib.strftime)
assert.fn(lib.strftimeUTC)
assert.fn(lib.getLocalizedStrftime)


/// check formats

assert.format = function(format, expected, expectedUTC) {
  function _assertFmt(expected, name) {
    name = name || 'strftime'
    var actual = lib[name](format, Time)
    assert.equal(expected, actual,
                 name + '("' + format + '", Time) is ' + JSON.stringify(actual)
                 + ', expected ' + JSON.stringify(expected))
  }

  if (expected) _assertFmt(expected)
  _assertFmt(expectedUTC || expected, 'strftimeUTC')
}

assert.format('%A', 'Tuesday')
assert.format('%a', 'Tue')
assert.format('%B', 'June')
assert.format('%b', 'Jun')
assert.format('%D', '06/07/11')
assert.format('%d', '07')
assert.format('%e', '7')
assert.format('%F', '2011-06-07')
assert.format('%H', null, '18')
assert.format('%I', null, '06')
assert.format('%k', null, '18')
assert.format('%L', '067')
assert.format('%l', null, ' 6')
assert.format('%M', null, '51')
assert.format('%m', '06')
assert.format('%n', '\n')
assert.format('%p', null, 'PM')
assert.format('%R', null, '18:51')
assert.format('%r', null, '06:51:45 PM')
assert.format('%S', '45')
assert.format('%s', '1307472705')
assert.format('%T', null, '18:51:45')
assert.format('%t', '\t')
assert.format('%u', '2')
assert.format('%v', '7-Jun-2011')
assert.format('%w', '2')
assert.format('%Y', '2011')
assert.format('%y', '11')
assert.format('%Z', null, 'GMT')
assert.format('%z', null, '+0000')
assert.format('%%', '%') // any other char

ok('GMT')

// PST/PDT
testTimezone('P[DS]T')
// test other time zones you care about here

function ok(s) { console.log('[ \033[32mOK\033[0m ] ' + s) }

// Pass a regex or string that matches the timezone abbrev, e.g. %Z above.
// Don't pass GMT! Every date includes it and it will fail.
// Be careful if you pass a regex, it has to quack like the default one.
function testTimezone(regex) {
  regex = typeof regex === 'string' ? RegExp('\\((' + regex + ')\\)$') : regex
  var match = Time.toString().match(regex)
  if (match) {
    var hourDiff = Math.floor(Time.getTimezoneOffset() / 60)
      , hours = String(18 - hourDiff)
      , sign = hourDiff < 0 ? '+' : '-'
      , minDiff = Time.getTimezoneOffset() - (hourDiff * 60)
      , mins = String(51 - minDiff)
      , R = hours + ':' + mins
      , tz = match[1]
    assert.format('%H', hours, '18')
    assert.format('%I', hours, '06')
    assert.format('%k', hours, '18')
    assert.format('%l', hours, ' 6')
    assert.format('%M', mins)
    assert.format('%p', 'AM', 'PM')
    assert.format('%R', R, '18:51')
    assert.format('%r', R + ':45 AM', '06:51:45 PM')
    assert.format('%T', R + ':45', '18:51:45')
    assert.format('%Z', tz, 'GMT')
    assert.format('%z', sign + '0' + hourDiff + '00', '+0000')
    ok(tz)
  }
}