import argparse

import numpy as np
import pandas as pd
import torch
from sacred.observers import FileStorageObserver, MongoObserver
from torch import nn
from torch.utils.data import DataLoader, Dataset
from sacred import Experiment

from model import PlantsDataset, MLP, train, test

default_batch_size = 64
default_epochs = 5

device = "cuda" if torch.cuda.is_available() else "cpu"


def main(batch_size, epochs, _run):
    print(f"Using {device} device")

    plant_test = PlantsDataset('data/Plant_1_Generation_Data.csv.test')
    plant_train = PlantsDataset('data/Plant_1_Generation_Data.csv.train')

    train_dataloader = DataLoader(plant_train, batch_size=batch_size)
    test_dataloader = DataLoader(plant_test, batch_size=batch_size)

    for i, (data, labels) in enumerate(train_dataloader):
        print(data.shape, labels.shape)
        print(data, labels)
        break

    model = MLP()
    print(model)

    loss_fn = nn.MSELoss()
    optimizer = torch.optim.Adam(model.parameters(), lr=1e-3)
    for t in range(epochs):
        print(f"Epoch {t + 1}\n-------------------------------")
        train(train_dataloader, model, loss_fn, optimizer)
        last_loss = test(test_dataloader, model, loss_fn)
        _run.log_scalar('training.loss', last_loss, t)
    print("Done!")

    torch.save(model.state_dict(), './model_out')
    print("Model saved in ./model_out file.")


def setup_experiment():
    ex = Experiment('Predict power output for a given time')
    ex.observers.append(FileStorageObserver('sacred_runs'))
    ex.observers.append(MongoObserver(url='mongodb://admin:IUM_2021@172.17.0.1:27017',
                                      db_name='sacred'))
    return ex


ex = setup_experiment()


@ex.config
def experiment_config():
    batch_size = 64
    epochs = 5


@ex.automain
def run(batch_size, epochs, _run):
    main(batch_size, epochs, _run)


ex.add_artifact('model_out')