from data_stat import Stat, Format

import torch, scipy
import numpy as np
import argparse
import time
import json
import sys, os

parser = argparse.ArgumentParser()
parser.add_argument('iterations', type=int, help='the number of iterations of multiplication to perform')
parser.add_argument('format', type=str,
        choices=[fmt.name.lower() for fmt in Format],
        help='the sparse format to use')
parser.add_argument('-m', '--matrix_file', help='the input matrix (.mtx) file')
parser.add_argument('-ss', '--synthetic_size', type=int,
        help='the synthetic matrix parameters size (rows)')
parser.add_argument('-sd', '--synthetic_density', type=float,
        help='the synthetic matrix density (%)')
args = parser.parse_args()
args.format = Format[args.format.upper()]

device = 'cpu'

if args.matrix_file is not None:
    matrix = scipy.io.mmread(args.matrix_file)
    matrix = torch.sparse_coo_tensor(
        np.vstack((matrix.row, matrix.col)),
        matrix.data, matrix.shape,
        device=device, dtype=torch.float32)
elif args.synthetic_size is not None and args.synthetic_density is not None:
    nnz = int((args.synthetic_size ** 2) * (args.synthetic_density / 100))
    row_indices = torch.randint(0, args.synthetic_size, (nnz,))
    col_indices = torch.randint(0, args.synthetic_size, (nnz,))
    indices = torch.stack([row_indices, col_indices])
    values = torch.randn(nnz)

    matrix = torch.sparse_coo_tensor(
            indices, values,
            size=(args.synthetic_size, args.synthetic_size),
            device=device, dtype=torch.float32)
else:
    print("No matrix specified!")
    exit(1)

if args.format == Format.CSR:
    matrix = matrix.to_sparse_csr().type(torch.float32)
elif args.format == Format.COO:
    pass
else:
    print("Unrecognized format!")
    exit(1)

vector = torch.rand(matrix.shape[1], device=device)

print(matrix, file=sys.stderr)
print(vector, file=sys.stderr)

start = time.time()
for i in range(0, args.iterations):
    torch.mv(matrix, vector)
    #torch.sparse.mm(matrix, vector.unsqueeze(-1)).squeeze(-1)
    #print(i)
end = time.time()

result = dict()

if args.matrix_file is not None:
    result[Stat.MATRIX_FILE.name] = os.path.splitext(os.path.basename(args.matrix_file))[0]
else:
    result[Stat.MATRIX_FILE.name] = "synthetic"
print(f"Matrix: {result[Stat.MATRIX_FILE.name]}", file=sys.stderr)

result[Stat.MATRIX_SHAPE.name] = matrix.shape
print(f"Shape: {result[Stat.MATRIX_SHAPE.name]}", file=sys.stderr)

result[Stat.MATRIX_SIZE.name] = matrix.shape[0] * matrix.shape[1]
print(f"Size: {result[Stat.MATRIX_SIZE.name]}", file=sys.stderr)

result[Stat.MATRIX_NNZ.name] = matrix.values().shape[0]
print(f"NNZ: {result[Stat.MATRIX_NNZ.name]}", file=sys.stderr)

result[Stat.MATRIX_DENSITY.name] = matrix.values().shape[0] / (matrix.shape[0] * matrix.shape[1])
print(f"Density: {result[Stat.MATRIX_DENSITY.name]}", file=sys.stderr)

result[Stat.TIME_S.name] = end - start
print(f"Time: {result[Stat.TIME_S.name]} seconds", file=sys.stderr)

print(json.dumps(result))