"""Test SLURM module."""

from pathlib import Path

from glicid_spawner.slurm import (
    SlurmCpu,
    SlurmGpu,
    SlurmNode,
    sinfo,
    sinfo_filter,
    sinfo_reader,
    sinfo_run,
    subprocess,
)

DATA = Path(__file__).parent / 'data'
SINFO = (DATA / 'sinfo.txt').read_text()


def test_slurm_dataclasses():
    """Test SLURM dataclasses formatter."""
    cpu = SlurmCpu(1, '2', 4.0)

    assert cpu.allocated == 1
    assert cpu.idle == 2
    assert cpu.total == 4

    assert isinstance(cpu.allocated, int)
    assert isinstance(cpu.idle, int)
    assert isinstance(cpu.total, int)

    gpu = SlurmGpu('fOo', '1')

    assert gpu  # __bool__
    assert gpu.name == 'Foo'
    assert gpu.nb == 1

    assert isinstance(gpu.name, str)
    assert isinstance(gpu.nb, int)

    # Default values
    gpu = SlurmGpu()

    assert not gpu  # __bool__
    assert gpu.name == 'None'
    assert gpu.nb == 0


def test_slurm_sinfo_run(monkeypatch):
    """Test SLURM SINFO run command."""
    monkeypatch.setattr(subprocess, 'check_output', lambda cmd: ' '.join(cmd).encode())

    assert sinfo_run() == (
        'sinfo '
        '--federation '
        '--noheader '
        '--responding '
        '--Format=Cluster,PartitionName,NodeHost,StateLong,CPUsState,Memory,Gres'
    )

    assert sinfo_run(username='john-doe') == (
        'su - john-doe -c "'
        'sinfo '
        '--federation '
        '--noheader '
        '--responding '
        '--Format=Cluster,PartitionName,NodeHost,StateLong,CPUsState,Memory,Gres'
        '"'
    )


def test_slurm_sinfo_reader():
    """Test SLURM SINFO reader."""
    nodes = sinfo_reader(SINFO)

    for node in nodes:
        assert isinstance(node, SlurmNode)

    node = nodes[0]

    assert node.cluster is None
    assert node.partition == 'Devel'
    assert node.hostname == 'nazare001'
    assert node.state == 'idle'
    assert node.cpu.allocated == 0
    assert node.cpu.idle == node.cpu.total == 20
    assert node.mem == 128
    assert not node.gpu

    assert [node.cluster for node in nodes] == 7 * [None] + 6 * ['nautilus'] + 4 * ['waves']

    assert len([node for node in nodes if node.state in ('idle', 'mixed')]) == 7

    for node in nodes:
        if node.state == 'idle':
            assert node.cpu.allocated == 0
            assert node.cpu.idle > 0
        elif node.state == 'mixed':
            assert node.cpu.allocated > 0
            assert node.cpu.idle > 0
        elif node.state == 'allocated':
            assert node.cpu.allocated > 0
            assert node.cpu.idle == 0

    assert sum(node.mem for node in nodes) == 4_672

    assert [node.gpu.name for node in nodes if node.gpu] == [
        'T4',
        'A40',
        'P100',
        'K80',
        'P100',
    ] + 4 * ['A100']

    assert [node.gpu.nb for node in nodes if node.gpu] == [2, 2, 2, 4, 1, 1, 2, 4, 2]


def test_slurm_sinfo_filter(monkeypatch):
    """Test SLURM SINFO filtered resources."""
    resources = sinfo_reader(SINFO)

    clusters = sinfo_filter(resources)

    assert isinstance(clusters, dict)
    assert len(clusters) == 3
    assert list(clusters) == [None, 'nautilus', 'waves']

    assert [len(partitions) for partitions in clusters.values()] == [2, 2, 2]

    partitions = clusters['nautilus']

    assert isinstance(partitions, dict)
    assert len(partitions) == 2
    assert list(partitions) == ['gpu', 'all']

    gpu_nodes = partitions['gpu']

    assert len(gpu_nodes) == 2
    assert [node.hostname for node in gpu_nodes] == ['gnode1', 'gnode2']
    assert [node.cpu.allocated for node in gpu_nodes] == [4, 0]
    assert [node.cpu.idle for node in gpu_nodes] == [92, 96]
    assert [node.mem for node in gpu_nodes] == [768, 256]
    assert [node.gpu.name for node in gpu_nodes] == ['A100', 'A100']
    assert [node.gpu.nb for node in gpu_nodes] == [1, 2]

    # Get only `idle` nodes
    clusters = sinfo_filter(resources, with_states=('idle'))

    assert list(clusters) == [None, 'nautilus', 'waves']
    assert [len(partitions) for partitions in clusters.values()] == [1, 2, 1]

    # Discard clusters without partition available
    clusters = sinfo_filter(resources, with_states=('completing'))

    assert list(clusters) == ['nautilus']
    assert [len(partitions) for partitions in clusters.values()] == [1]


def test_slurm_sinfo_resources(monkeypatch):
    """Test SLURM SINFO resources."""
    monkeypatch.setattr(subprocess, 'check_output', lambda _: SINFO.encode())

    clusters = sinfo(username='john-doe', with_states=('completing'))

    assert list(clusters) == ['nautilus']

    partitions = clusters['nautilus']

    assert list(partitions) == ['standard']

    std_nodes = partitions['standard']

    assert std_nodes == [
        SlurmNode(*'nautilus standard cnode001 completing 0/96/0/96 384000 (null)'.split())
    ]