#! compare MemJK and DiskJK

import psi4
import pytest
import numpy as np
import random
from .utils import *


@pytest.fixture(scope="module", params=["spherical", "cartesian"])
def build_system(request):
    mol = psi4.geometry("""
    O
    H 1 1.00
    H 1 1.00 2 103.1
    """)

    memory = 50000

    puream = request.param == "spherical"
    primary = psi4.core.BasisSet.build(mol, "ORBITAL", "cc-pVDZ", puream=puream)
    aux = psi4.core.BasisSet.build(mol, "ORBITAL", "cc-pVDZ-jkfit", puream=puream)

    nbf = primary.nbf()
    naux = aux.nbf()

    # construct spaces
    names = ['C1', 'C2', 'C3', 'C4', 'C5']
    sizes = [16, 16, 20, 20, 30]
    spaces = {names[ind]: psi4.core.Matrix.from_array(np.random.rand(nbf, size)) for ind, size in enumerate(sizes)}
    space_pairs = [[0, 0], [0, 1], [1, 1], [2, 2], [3, 2], [3, 3], [4, 4]]

    # space vectors
    C_vectors = [[spaces[names[left]], spaces[names[right]]] for left, right in space_pairs]

    # DiskJK
    psi4.set_options({"SCF_TYPE": "DISK_DF"})
    DiskJK = psi4.core.JK.build_JK(primary, aux)
    DiskJK.initialize()
    DiskJK.print_header()

    # symm_JK
    psi4.set_options({"SCF_TYPE": "MEM_DF"})
    MemJK = psi4.core.JK.build_JK(primary, aux)
    MemJK.initialize()
    MemJK.print_header()

    # add C matrices
    for Cleft, Cright in C_vectors:
        DiskJK.C_left_add(Cleft)
        MemJK.C_left_add(Cleft)
        DiskJK.C_right_add(Cright)
        MemJK.C_right_add(Cright)

    # compute
    DiskJK.compute()
    MemJK.compute()

    # get integrals
    DiskJK_ints = [DiskJK.J(), DiskJK.K()]
    MemJK_ints = [MemJK.J(), MemJK.K()]

    return (DiskJK_ints, MemJK_ints)


def test_dfjk_compare(build_system):

    disk, mem = build_system

    # compare
    for j, t in enumerate(['J', 'K']):
        for i in range(len(disk[0])):
            assert compare_arrays(np.asarray(disk[j][i]), np.asarray(mem[j][i]), 9, t + str(i))
