import path from 'path'
import fs from 'fs'

const name = 'pix2pixhd'
const cwd = process.env.PIX2PIXHD_CWD || path.join(process.env.HOME, 'code/' + name + '/')
const env = {
  LD_LIBRARY_PATH: '/usr/local/cuda/lib64:' + process.env.TENSORRT_LIB_PATH,
}

const fetch = {
  type: 'perl',
  script: 'get.pl',
  params: (task) => {
    console.log(task)
    return [ task.opt.url ]
  },
  listen: (task, res, i) => {
    // relay the new dataset name from youtube-dl or w/e
    const lines = res.split('\n')
    for (let line of lines) {
      // console.log(line)
      if ( line.match(/^created dataset: /) ) {
        let tag = line.split(': ')[1].trim()
        task.dataset = tag
        // task.opt.filename = filename
        console.log(">>>>>> created dataset", tag)
        return { type: 'progress', action: 'resolve_dataset', task }
      }
    }
    return null
  },
  after: 'build',
}
const build = {
  type: 'perl',
  script: 'build_dataset.pl',
  params: (task) => {
    return [
      task.dataset,
    ]
  }
}
const train = {
  type: 'pytorch',
  script: 'train.py',
  params: (task) => {
    let epoch = 0
    const dataset = task.dataset.toLowerCase()
    const datasets_path = path.join(cwd, 'datasets', dataset)
    const checkpoints_path = path.join(cwd, 'checkpoints', dataset)
    const iter_txt = path.join(checkpoints_path, 'iter.txt')
    const checkpoint_path = path.join(checkpoints_path, 'latest_net_G.pth')
    console.log(dataset, iter_txt)
    if (fs.existsSync(iter_txt) && fs.existsSync(checkpoint_path)) {
      const iter = fs.readFileSync(iter_txt).toString().split('\n');
      console.log(iter)
      epoch = iter[0] || 0
      console.log(task.module, dataset, '=>', epoch, task.epochs)
    } else {
      console.log(task.module, dataset, '=>', 'starting new training')
    }
    let args = [
      '--dataroot', datasets_path,
      '--module_name', task.module,
      '--name', dataset,
      '--model', 'pix2pixHD',
      '--label_nc', 0, '--no_instance',
      '--niter', task.epochs || 1,
      '--niter_decay', 0,
      '--save_epoch_freq', 1,
    ]
    if (epoch) {
      args = args.concat([
        '--which_epoch', 'latest',
        '--continue_train',
      ])
    }
    return args
  },
  listen: (task, res, i) => {
    console.log(res)
    return null
  },
}
const generate = {
  type: 'pytorch',
  script: 'test.py',
  params: (task) => {
    let epoch = 0
    const dataset = task.dataset.toLowerCase()
    const datasets_path = path.join(cwd, 'datasets', dataset)
    const checkpoints_path = path.join(cwd, 'checkpoints', dataset)
    const iter_txt = path.join(checkpoints_path, 'iter.txt')
    console.log(dataset, iter_txt)
    if (fs.existsSync(iter_txt)) {
      const iter = fs.readFileSync(iter_txt).toString().split('\n');
      console.log(iter)
      epoch = iter[0] || 0
      console.log(task.module, dataset, '=>', epoch, task.epochs)
    } else {
      console.log(task.module, dataset, '=>', 'starting new training')
    }
    return [
      '--dataroot', datasets_path,
      '--module_name', task.module,
      '--name', dataset,
      '--model', 'pix2pixHD',
      '--label_nc', 0, '--no_instance',
      '--niter', task.epochs,
      '--niter_decay', 0,
      '--save_epoch_freq', 1,
    ]
  },
  after: 'render',
}
const augment = {
  type: 'pytorch',
  script: 'augment.py',
  params: (task) => {
    let epoch = 0
    const dataset = task.dataset.toLowerCase()
    const datasets_path = path.join(cwd, 'datasets', dataset)
    const checkpoints_path = path.join(cwd, 'checkpoints', dataset)
    // supply render_dir
    let args = [
      '--dataroot', datasets_path,
      '--results_dir', './recursive',
      '--module_name', task.module,
      '--name', dataset,
      '--sequence-name', dataset,
      '--model', 'pix2pixHD',
      '--label_nc', 0, '--no_instance',
      '--augment-take', task.opt.augment_take,
      '--augment-make', task.opt.augment_make,
      '--which_epoch', task.opt.epoch || "latest",
    ]
    if (!!task.opt.augment_name) {
      args.push('--augment-name', task.opt.augment_name)
    }
    if (!!task.opt.no_symlinks) {
      args.push('--no-symlinks')
    }
    return args
  },
  listen: (task, res, i) => {
    // extract the new path name
    const lines = res.split('\n')
    for (let line of lines) {
      console.log(line)
      if ( line.match(/^render_dir: /) ) {
        let tag = line.split(': ')[1].trim()
        task.opt.render_dir = tag
        // task.opt.filename = filename
        console.log(">>>>>> created dataset", tag)
        return { type: 'progress', action: 'resolve_dataset', task }
      }
    }
    return null
  },
  after: 'render_recursive',
}
const live = {
  type: 'pytorch',
  script: 'live.py',
  params: (task) => {
    console.log(task)
    const opt = task.opt || {}
    return [
      '--phase', 'recursive',
      '--dataroot', path.join(cwd, 'sequences', task.dataset),
      '--start_img', path.join(cwd, 'sequences', task.dataset, 'frame_00001.png'),
      '--checkpoint-name', task.checkpoint,
      '--experiment', task.checkpoint,
      '--name', task.checkpoint,
      '--module_name', 'pix2pixHD',
      '--sequence-name', task.dataset,
      '--sequence', '--sequence-frac', 0.3,
      '--process-frac', 0.5,
      '--label_nc', '0', '--no_instance',
      '--how_many', 10000, '--transition-period', 1000,
      '--just-copy', '--poll_delay', opt.poll_delay || 0.09,
      '--which_epoch', 'latest',
      '--norm', 'batch',
      '--store_b', // uncomment this line to store all live output
    ]
  },
  listen: (task, res, i) => {
    // relay the new dataset name from youtube-dl or w/e
    const lines = res.split('\n')
    for (let line of lines) {
      // console.log(line)
      if ( line.match(/^final result: /) ) {
        let tag = line.split(': ')[1].trim()
        task.dataset = tag
        console.log(">>>>>> recording live to", tag)
        return { type: 'progress', action: 'resolve_dataset', task }
      }
    }
    return null
  },
  after: 'render',
}
const render = {
  type: 'perl',
  script: 'dir-to-movie.pl',
  params: (task) => {
    return [
      '--path', 'results',
      '--tag', task.dataset,
      '--module', task.module,
      '--endpoint', process.env.API_REMOTE + '/api/folder/' + task.opt.folder_id + '/upload/',
    ]
  }
}
const render_recursive = {
  type: 'perl',
  script: 'dir-to-movie.pl',
  params: (task) => {
    if (!task.opt.mov) {
      console.log('will not render mov')
      return 'CANCEL'
    }
    if (!task.opt.render_dir) {
      return 'CANCEL';
    }
    const render_dir = task.opt.render_dir.replace('./recursive/', '')
    console.log('rendering recursve path:', render_dir)
    return [
      '--path', 'recursive',
      '--tag', render_dir,
      '--module', task.module,
      '--endpoint', process.env.API_REMOTE + '/api/folder/' + task.opt.folder_id + '/upload/',
      '--prefix', 'recur',
    ]
  }
}
const splice = {
  type: 'perl',
  script: 'splice.pl',
  params: (task) => {
    console.log(task.opt.selection)
    return [
      '--dataset', task.dataset,
      '--sequence', task.opt.sequence,
      '--start_frame', task.opt.selection.start.i,
      '--end_frame', task.opt.selection.end.i,
      '--module', task.module,
      '--folder_id', task.opt.folder_id,
      '--endpoint', process.env.API_REMOTE + '/api/file/',
    ]
  },
  after: 'train'
}
const uprez = {
  type: 'pytorch',
  script: 'uprez.py',
  params: task => {
    console.log(task)
    /*
     set folder based on whether the file is a result or recursive mp4
    */
    let folder
    if (task.opt.is_result) {
      folder = './results/' + task.dataset
    } else if (task.opt.is_recursive) {
      folder = './recursive/' + task.dataset + '/' + task.opt.name + '/'
    }
    return [
      '--folder', folder,
      '--folder_id', task.opt.folder_id,
      '--dataset', task.dataset,
      '--out_fn', task.dataset + "_" + Date.now(),
    ]
  }
}

function pad(num, size) {
  if (isNaN(parseInt(num))) return num;
  var s = num + "";
  while (s.length < size) s = "0" + s;
  return s;
}

export default {
  name, cwd, env,
  activities: {
    fetch,
    build,
    train,
    generate,
    augment,
    live,
    render,
    render_recursive,
    splice,
    uprez,
  }
}