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import pytest

from Tensile.Common import globalParameters
from Tensile.DataType import DataType
from Tensile.SolutionStructs import Solution, disablePreloadKernelArguments


def test_disable_preload_kernel_arguments_clears_delay():
    state = {"PreloadKernelArguments": 1, "DelayRemainingArguments": True}

    disablePreloadKernelArguments(state)

    assert state["PreloadKernelArguments"] == 0
    assert state["DelayRemainingArguments"] is False


def test_gfx12_wmma_mi_input_per_thread_uses_generic_formula():
    isa = (12, 0, 1)
    oldAsmCaps = globalParameters.get("AsmCaps")
    globalParameters["AsmCaps"] = {isa: {"HasMFMA": False, "HasWMMA": True}}
    state = {
        "ISA": isa,
        "MatrixInstruction": [16, 16, 16, 1, 1, 4, 4, 2, 2],
        "ThreadTile": [0, 0],
        "WorkGroup": [0, 0, 1],
        "WavefrontSize": 32,
        "ProblemType": {"DataType": DataType("H")},
        "EnableF32XdlMathOp": False,
    }

    try:
        Solution.parameterWrapper(state)
    finally:
        if oldAsmCaps is None:
            del globalParameters["AsmCaps"]
        else:
            globalParameters["AsmCaps"] = oldAsmCaps

    assert state["MIInputPerThread"] == state["MatrixInstruction"][0] * state["MatrixInstruction"][2] * state["MatrixInstruction"][3] // state["WavefrontSize"]


def test_gfx11_wmma_mi_input_per_thread_keeps_full_k():
    isa = (11, 0, 0)
    oldAsmCaps = globalParameters.get("AsmCaps")
    globalParameters["AsmCaps"] = {isa: {"HasMFMA": False, "HasWMMA": True}}
    state = {
        "ISA": isa,
        "MatrixInstruction": [16, 16, 16, 1, 1, 4, 4, 2, 2],
        "ThreadTile": [0, 0],
        "WorkGroup": [0, 0, 1],
        "WavefrontSize": 32,
        "ProblemType": {"DataType": DataType("H")},
        "EnableF32XdlMathOp": False,
    }

    try:
        Solution.parameterWrapper(state)
    finally:
        if oldAsmCaps is None:
            del globalParameters["AsmCaps"]
        else:
            globalParameters["AsmCaps"] = oldAsmCaps

    assert state["MIInputPerThread"] == 16


@pytest.mark.parametrize("tc", ["A", "B"])
def test_direct_to_lds_rejects_x2_b64_load(tc):
    # An 8-byte (b64 / dwordx2) DirectToLds load has no valid hardware
    # instruction: the lds modifier is only legal on the x1 (dword) and
    # x4 (dwordx4) buffer loads. isDirectToLdsDoable must reject it so the
    # kernel falls back to the non-DTL path (gfx950 previously emitted an
    # illegal buffer_load_dwordx2 ... lds that failed to assemble).
    # The stub is intentionally minimal: the x2 reject fires before any other
    # field is read, so only the values needed to reach it are provided.
    isa = (9, 5, 0)
    oldArchCaps = globalParameters.get("ArchCaps")
    globalParameters["ArchCaps"] = {isa: {"HasDTLx4": True}}
    state = {
        "ISA": isa,
        "ProblemType": {"DataType": DataType("S")},  # fp32 -> 4 bytes/element
        "AssertSummationElementMultiple": 1,
        "GlobalSplitU": 1,
        "GlobalLoadVectorWidthA": 2,  # 2 * 4 = 8 bytes/load -> x2 (b64)
        "GlobalLoadVectorWidthB": 2,
    }

    try:
        doable = Solution.isDirectToLdsDoable(state, tc)
    finally:
        if oldArchCaps is None:
            del globalParameters["ArchCaps"]
        else:
            globalParameters["ArchCaps"] = oldArchCaps

    assert doable is False
    assert state["Valid"] is False