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import argparse
import json
import logging
import os
import time

from dataset import SDataset, MDataset
from network import MMPeptide, SEQPeptide, VoxPeptide, MMFPeptide, SMPeptide
from sklearn.model_selection import KFold
from train import train
import torch
import torch.nn as nn
from torch.utils.data import Subset, DataLoader
import numpy as np
from loss import MLCE, SuperLoss, LogCoshLoss
from utils import set_seed


parser = argparse.ArgumentParser(description='resnet26')
# model setting
parser.add_argument('--model', type=str, default='mm',
                    help='model resnet26, bi-gru')
parser.add_argument('--fusion', type=str, default='1',
                    help="Seed for splitting dataset (default 1)")

# task & dataset setting
parser.add_argument('--pdb-src', type=str, dest='pdb_src', default='af',
                    help='af or hf')
parser.add_argument('--task-type', type=str, dest='task_type', default='mlc',
                    help='mlc or slc')
parser.add_argument('--task', type=str, default='all',
                    help='task: anti toxin anti-all mechanism anti-binary anti-regression mic')
parser.add_argument('--classes', type=int, default=6,
                    help='model')
parser.add_argument('--max-length', dest='max_length', type=int, default=30,
                    help='Max length for sequence filtering')
parser.add_argument('--split', type=int, default=5,
                    help="Split k fold in cross validation (default: 5)")
parser.add_argument('--seed', type=int, default=1,
                    help="Seed for splitting dataset (default: 1)")
parser.add_argument('--threshold', type=float, default=64,
                    help="MIC threshold for determine labels (default: 64)")

# training setting
parser.add_argument('--gpu', type=int, default=0,
                    help='GPU index to use, -1 for CPU (default: 0)')
parser.add_argument('--batch-size', type=int, dest='batch_size', default=128,
                    help='input batch size for training (default: 128)')
parser.add_argument('--epochs', type=int, default=50,
                    help='number of epochs to train (default: 50)')
parser.add_argument('--lr', type=float, default=0.02,
                    help='learning rate (default: 0.002)')
parser.add_argument('--decay', type=float, default=0.0005,
                    help='weight decay (default: 0.0005)')
parser.add_argument('--warm-steps', type=int, dest='warm_steps', default=0,
                    help='number of warm start steps for learning rate (default: 10)')
parser.add_argument('--patience', type=int, default=10,
                    help='patience for early stopping (default: 10)')
parser.add_argument('--pretrain', type=str, dest='pretrain', default='',
                    help='path of the pretrain model')  # /home/duadua/Desktop/fetal/3dpretrain/runs/e50.pth
parser.add_argument('--metric-avg', type=str, dest='metric_avg', default='micro',
                    help='metric average type')

# args for losses
parser.add_argument('--loss', type=str, default='mlce',
                    help='loss function (mlce, sl, mix)')

parser.add_argument('--bias-curri', dest='bias_curri', action='store_true', default=False,
                    help='directly use loss as the training data (biased) or not (unbiased)')
parser.add_argument('--anti-curri', dest='anti_curri', action='store_true', default=False,
                    help='easy to hard (curri), hard to easy (anti)')
parser.add_argument('--std-coff', dest='std_coff', type=float, default=1,
                    help='the hyper-parameter of std')

args = parser.parse_args()


def main():
    set_seed(args.seed)

    if args.task_type == 'slc':
        if args.task == 'all':
            raise ValueError('Choose one task number to run single label classification')
        args.classes = 1
    elif args.task_type == 'mlc':
        pass
    else:
        raise NotImplementedError

    weight_dir = "./run/" + args.task_type + '-' + args.task + "-m-" + args.model + '-' + args.loss + str(args.batch_size) + str(args.lr) + str(args.epochs) + args.pdb_src
    if not os.path.exists(weight_dir):
        raise ValueError
    
    logging.basicConfig(handlers=[
        # logging.FileHandler(filename=os.path.join(weight_dir, "eval.log"), encoding='utf-8', mode='w+'),
        logging.StreamHandler()],
        format="%(asctime)s: %(message)s", datefmt="%F %T", level=logging.INFO)

    logging.info(f'saving_dir: {weight_dir}')
    
    # with open(os.path.join(weight_dir, "config.json"), "w") as f:
    #     f.write(json.dumps(vars(args)))

    device = torch.device("cpu" if args.gpu == -1 or not torch.cuda.is_available() else f"cuda:{args.gpu}")

    logging.info('Loading Training Dataset')
    if args.task_type == 'mlc':
        set_all = MDataset(threshold=args.threshold, mode='train', max_length=args.max_length, pdb_src=args.pdb_src)
    else:
        set_all = SDataset(threshold=args.threshold, mode='train', task=args.task, max_length=args.max_length, pdb_src=args.pdb_src)
    logging.info('Loading Test Dataset')
    if args.task_type == 'mlc':
        qlx_set = MDataset(threshold=args.threshold, mode='qlx', max_length=args.max_length, pdb_src=args.pdb_src)
        saap_set = MDataset(threshold=args.threshold, mode='saap', max_length=args.max_length, pdb_src=args.pdb_src)
    else:
        qlx_set = SDataset(threshold=args.threshold, mode='qlx', task=args.task, max_length=args.max_length, pdb_src=args.pdb_src)
        saap_set = SDataset(threshold=args.threshold, mode='saap', task=args.task, max_length=args.max_length, pdb_src=args.pdb_src)

    best_perform_list = [[] for i in range(5)]
    qlx_perform_list = [[] for i in range(5)]
    saap_perform_list = [[] for i in range(5)]

    kf = KFold(n_splits=5, shuffle=True, random_state=42)

    for fold, (train_idx, val_idx) in enumerate(kf.split(set_all)):
        # train_set= Subset(set_all, train_idx)
        valid_set = Subset(set_all, val_idx)

        # train_loader = DataLoader(train_set, batch_size=args.batch_size, shuffle=True, drop_last=True)
        valid_loader = DataLoader(valid_set, batch_size=args.batch_size, shuffle=False)
        qlx_loader = DataLoader(qlx_set, batch_size=1, shuffle=False)
        saap_loader = DataLoader(saap_set, batch_size=1, shuffle=False)
        if args.model == 'seq':
            model = SEQPeptide(classes=set_all.num_classes, q_encoder='mlp')
        elif args.model == 'voxel':
            model = VoxPeptide(classes=set_all.num_classes)
        elif args.model == 'mm':
            # model = MMPeptide(classes=train_set.num_classes, q_encoder='tf', ) # attention='hamburger'
            # model = SMPeptide(classes=train_set.num_classes, q_encoder='mlp', max_length=30) # attention='hamburger'
            model = MMPeptide(classes=set_all.num_classes, q_encoder='mlp', max_length=args.max_length)# , attention='hamburger'
        elif args.model == 'mmf':
            model = MMFPeptide(classes=set_all.num_classes, q_encoder='mlp', max_length=args.max_length) # attention='hamburger'
        if len(args.pretrain) != 0:
            logging.info('loading pretrain model')
            # model = load_pretrain_model(model, torch.load(args.pretrain))
            model_state = model.state_dict()
            pretrained_state = torch.load(args.pretrain)
            pretrained_state = {k: v for k, v in pretrained_state.items() if
                                k in model_state and v.size() == model_state[k].size()}
            model_state.update(pretrained_state)
            model.load_state_dict(model_state)
            # model.load_state_dict(torch.load(args.pretrain), strict=False)
        model.to(device)
        weights_path = f"{weight_dir}/model_{fold + 1}.pth"
        model.load_state_dict(torch.load(weights_path))
        # early_stopping = EarlyStopping(patience=args.patience, path=weights_path)
        logging.info(f'Running Cross Validation {fold + 1}')
        logging.info(f'Fold {fold + 1}   Valid set:{len(valid_set)}, Test set:qlx {len(qlx_set)} saap {len(saap_set)}')


        if args.task_type in ('mlc', 'slc') :
            _, ap, f1, acc, auc = train(args, None, model, None, valid_loader, device, None, None)
            logging.info(f'ap: {ap:.3f}, f1: {f1:.3f}, acc: {acc:.3f}, auc: {auc:.3f}')
            best_perform_list[fold] = np.asarray([ap, f1, acc, auc])
            
            _, qlx_ap, qlx_f1, qlx_acc, qlx_auc = train(args, None, model, None, qlx_loader, device, None, None)
            logging.info(f'QLX results, ap: {qlx_ap:.3f}, f1: {qlx_f1:.3f}, acc: {qlx_acc:.3f}, auc: {qlx_auc:.3f}')
            qlx_perform_list[fold] = np.asarray([qlx_ap, qlx_f1, qlx_acc, qlx_auc])
            
            _, saap_ap, saap_f1, saap_acc, saap_auc = train(args, None, model, None, saap_loader, device, None, None)
            logging.info(f'SAAP results, ap: {saap_ap:.3f}, f1: {saap_f1:.3f}, acc: {saap_acc:.3f}, auc: {saap_auc:.3f}')
            saap_perform_list[fold] = np.asarray([saap_ap, saap_f1, saap_acc, saap_auc])
                        
        else:
            raise NotImplementedError
            
    logging.info(f'Cross Validation Finished!')
    best_perform_list = np.asarray(best_perform_list)
    qlx_perform_list = np.asarray(qlx_perform_list)
    saap_perform_list = np.asarray(saap_perform_list)
    logging.info('Best validation perform list\n%s', best_perform_list)
    logging.info('mean: %s', np.round(np.mean(best_perform_list, 0), 3))
    logging.info('std: %s', np.round(np.std(best_perform_list, 0), 3))
    logging.info('Best qlx perform list\n%s', qlx_perform_list)
    logging.info('mean: %s', np.round(np.mean(qlx_perform_list, 0), 3))
    logging.info('std: %s', np.round(np.std(qlx_perform_list, 0), 3))
    logging.info('Best saap perform list\n%s', saap_perform_list)
    logging.info('mean: %s', np.round(np.mean(saap_perform_list, 0), 3))
    logging.info('std: %s', np.round(np.std(saap_perform_list, 0), 3))
    perform = open(weight_dir+'/eval.txt', 'w')
    perform.write('Valid\n')
    perform.write(','.join([str(i) for i in np.mean(best_perform_list, 0)])+'\n')
    perform.write(','.join([str(i) for i in np.std(best_perform_list, 0)])+'\n')
    perform.write('qlx\n')
    perform.write(','.join([str(i) for i in np.mean(qlx_perform_list, 0)])+'\n')
    perform.write(','.join([str(i) for i in np.std(qlx_perform_list, 0)])+'\n')
    perform.write('saap\n')
    perform.write(','.join([str(i) for i in np.mean(saap_perform_list, 0)])+'\n')
    perform.write(','.join([str(i) for i in np.std(saap_perform_list, 0)])+'\n')


if __name__ == "__main__":
    main()