var test = require('tape')
var tar = require('../index')
var fixtures = require('./fixtures')
var concat = require('concat-stream')
var fs = require('fs')

var clamp = function(index, len, defaultValue) {
  if (typeof index !== 'number') return defaultValue
  index = ~~index  // Coerce to integer.
  if (index >= len) return len
  if (index >= 0) return index
  index += len
  if (index >= 0) return index
  return 0
}

test('one-file', function(t) {
  t.plan(3)

  var extract = tar.extract()
  var noEntries = false

  extract.on('entry', function(header, stream, callback) {
    t.deepEqual(header, {
      name: 'test.txt',
      mode: 0644,
      uid: 501,
      gid: 20,
      size: 12,
      mtime: new Date(1387580181000),
      type: 'file',
      linkname: null,
      uname: 'maf',
      gname: 'staff',
      devmajor: 0,
      devminor: 0
    })

    stream.pipe(concat(function(data) {
      noEntries = true
      t.same(data.toString(), 'hello world\n')
      callback()
    }))
  })

  extract.on('finish', function() {
    t.ok(noEntries)
  })

  extract.end(fs.readFileSync(fixtures.ONE_FILE_TAR))
})

test('chunked-one-file', function(t) {
  t.plan(3)

  var extract = tar.extract()
  var noEntries = false

  extract.on('entry', function(header, stream, callback) {
    t.deepEqual(header, {
      name: 'test.txt',
      mode: 0644,
      uid: 501,
      gid: 20,
      size: 12,
      mtime: new Date(1387580181000),
      type: 'file',
      linkname: null,
      uname: 'maf',
      gname: 'staff',
      devmajor: 0,
      devminor: 0
    })

    stream.pipe(concat(function(data) {
      noEntries = true
      t.same(data.toString(), 'hello world\n')
      callback()
    }))
  })

  extract.on('finish', function() {
    t.ok(noEntries)
  })

  var b = fs.readFileSync(fixtures.ONE_FILE_TAR)

  for (var i = 0; i < b.length; i += 321) {
    extract.write(b.slice(i, clamp(i+321, b.length, b.length)))
  }
  extract.end()
})


test('multi-file', function(t) {
  t.plan(5)

  var extract = tar.extract()
  var noEntries = false

  var onfile1 = function(header, stream, callback) {
    t.deepEqual(header, {
      name: 'file-1.txt',
      mode: 0644,
      uid: 501,
      gid: 20,
      size: 12,
      mtime: new Date(1387580181000),
      type: 'file',
      linkname: null,
      uname: 'maf',
      gname: 'staff',
      devmajor: 0,
      devminor: 0
    })

    extract.on('entry', onfile2)
    stream.pipe(concat(function(data) {
      t.same(data.toString(), 'i am file-1\n')
      callback()
    }))
  }

  var onfile2 = function(header, stream, callback) {
    t.deepEqual(header, {
      name: 'file-2.txt',
      mode: 0644,
      uid: 501,
      gid: 20,
      size: 12,
      mtime: new Date(1387580181000),
      type: 'file',
      linkname: null,
      uname: 'maf',
      gname: 'staff',
      devmajor: 0,
      devminor: 0
    })

    stream.pipe(concat(function(data) {
      noEntries = true
      t.same(data.toString(), 'i am file-2\n')
      callback()
    }))
  }

  extract.once('entry', onfile1)

  extract.on('finish', function() {
    t.ok(noEntries)
  })

  extract.end(fs.readFileSync(fixtures.MULTI_FILE_TAR))
})

test('chunked-multi-file', function(t) {
  t.plan(5)

  var extract = tar.extract()
  var noEntries = false

  var onfile1 = function(header, stream, callback) {
    t.deepEqual(header, {
      name: 'file-1.txt',
      mode: 0644,
      uid: 501,
      gid: 20,
      size: 12,
      mtime: new Date(1387580181000),
      type: 'file',
      linkname: null,
      uname: 'maf',
      gname: 'staff',
      devmajor: 0,
      devminor: 0
    })

    extract.on('entry', onfile2)
    stream.pipe(concat(function(data) {
      t.same(data.toString(), 'i am file-1\n')
      callback()
    }))
  }

  var onfile2 = function(header, stream, callback) {
    t.deepEqual(header, {
      name: 'file-2.txt',
      mode: 0644,
      uid: 501,
      gid: 20,
      size: 12,
      mtime: new Date(1387580181000),
      type: 'file',
      linkname: null,
      uname: 'maf',
      gname: 'staff',
      devmajor: 0,
      devminor: 0
    })

    stream.pipe(concat(function(data) {
      noEntries = true
      t.same(data.toString(), 'i am file-2\n')
      callback()
    }))
  }

  extract.once('entry', onfile1)

  extract.on('finish', function() {
    t.ok(noEntries)
  })

  var b = fs.readFileSync(fixtures.MULTI_FILE_TAR)
  for (var i = 0; i < b.length; i += 321) {
    extract.write(b.slice(i, clamp(i+321, b.length, b.length)))
  }
  extract.end()
})

test('types', function(t) {
  t.plan(3)

  var extract = tar.extract()
  var noEntries = false

  var ondir = function(header, stream, callback) {
    t.deepEqual(header, {
      name: 'directory',
      mode: 0755,
      uid: 501,
      gid: 20,
      size: 0,
      mtime: new Date(1387580181000),
      type: 'directory',
      linkname: null,
      uname: 'maf',
      gname: 'staff',
      devmajor: 0,
      devminor: 0
    })
    stream.on('data', function() {
      t.ok(false)
    })
    extract.once('entry', onlink)
    callback()
  }

  var onlink = function(header, stream, callback) {
    t.deepEqual(header, {
      name: 'directory-link',
      mode: 0755,
      uid: 501,
      gid: 20,
      size: 0,
      mtime: new Date(1387580181000),
      type: 'symlink',
      linkname: 'directory',
      uname: 'maf',
      gname: 'staff',
      devmajor: 0,
      devminor: 0
    })
    stream.on('data', function() {
      t.ok(false)
    })
    noEntries = true
    callback()
  }

  extract.once('entry', ondir)

  extract.on('finish', function() {
    t.ok(noEntries)
  })

  extract.end(fs.readFileSync(fixtures.TYPES_TAR))
})

test('long-name', function(t) {
  t.plan(3)

  var extract = tar.extract()
  var noEntries = false

  extract.on('entry', function(header, stream, callback) {
    t.deepEqual(header, {
      name: 'my/file/is/longer/than/100/characters/and/should/use/the/prefix/header/foobarbaz/foobarbaz/foobarbaz/foobarbaz/foobarbaz/foobarbaz/filename.txt',
      mode: 0644,
      uid: 501,
      gid: 20,
      size: 16,
      mtime: new Date(1387580181000),
      type: 'file',
      linkname: null,
      uname: 'maf',
      gname: 'staff',
      devmajor: 0,
      devminor: 0
    })

    stream.pipe(concat(function(data) {
      noEntries = true
      t.same(data.toString(), 'hello long name\n')
      callback()
    }))
  })

  extract.on('finish', function() {
    t.ok(noEntries)
  })

  extract.end(fs.readFileSync(fixtures.LONG_NAME_TAR))
})

test('unicode-bsd', function(t) { // can unpack a bsdtar unicoded tarball
  t.plan(3)

  var extract = tar.extract()
  var noEntries = false

  extract.on('entry', function(header, stream, callback) {
    t.deepEqual(header, {
      name: 'høllø.txt',
      mode: 0644,
      uid: 501,
      gid: 20,
      size: 4,
      mtime: new Date(1387588646000),
      type: 'file',
      linkname: null,
      uname: 'maf',
      gname: 'staff',
      devmajor: 0,
      devminor: 0
    })

    stream.pipe(concat(function(data) {
      noEntries = true
      t.same(data.toString(), 'hej\n')
      callback()
    }))
  })

  extract.on('finish', function() {
    t.ok(noEntries)
  })

  extract.end(fs.readFileSync(fixtures.UNICODE_BSD_TAR))
})

test('unicode', function(t) { // can unpack a bsdtar unicoded tarball
  t.plan(3)

  var extract = tar.extract()
  var noEntries = false

  extract.on('entry', function(header, stream, callback) {
    t.deepEqual(header, {
      name: 'høstål.txt',
      mode: 0644,
      uid: 501,
      gid: 20,
      size: 8,
      mtime: new Date(1387580181000),
      type: 'file',
      linkname: null,
      uname: 'maf',
      gname: 'staff',
      devmajor: 0,
      devminor: 0
    })

    stream.pipe(concat(function(data) {
      noEntries = true
      t.same(data.toString(), 'høllø\n')
      callback()
    }))
  })

  extract.on('finish', function() {
    t.ok(noEntries)
  })

  extract.end(fs.readFileSync(fixtures.UNICODE_TAR))
})

test('name-is-100', function(t) {
  t.plan(3)

  var extract = tar.extract()

  extract.on('entry', function(header, stream, callback) {
    t.same(header.name.length, 100)

    stream.pipe(concat(function(data) {
      t.same(data.toString(), 'hello\n')
      callback()
    }))
  })

  extract.on('finish', function() {
    t.ok(true)
  })

  extract.end(fs.readFileSync(fixtures.NAME_IS_100_TAR))
})

test('invalid-file', function(t) {
  t.plan(1)

  var extract = tar.extract()

  extract.on('error', function(err) {
    t.ok(!!err)
    extract.destroy()
  })

  extract.end(fs.readFileSync(fixtures.INVALID_TGZ))
})

test('space prefixed', function(t) {
  t.plan(5)

  var extract = tar.extract()

  extract.on('entry', function(header, stream, callback) {
    t.ok(true)
    callback()
  })

  extract.on('finish', function() {
    t.ok(true)
  })

  extract.end(fs.readFileSync(fixtures.SPACE_TAR_GZ))
})