# Copyright (c) Huawei Technologies Co., Ltd. 2025. All rights reserved.
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# THE SOFTWARE.

import os
import pytest
import triton
import triton.language as tl
import triton.extension.buffer.language as bl
import triton.language.extra.cann.extension as al
from triton.compiler.compiler import ASTSource
from triton.compiler.code_generator import ast_to_ttir
from triton._C.libtriton import ir, buffer_ir
from triton._C.libtriton.ascend import ir as ascend_ir

os.environ["TORCH_DEVICE_BACKEND_AUTOLOAD"] = "0"


class Options:
    num_warps = 4
    num_stages = 3
    num_ctas = 1
    cluster_dims = (1, 1, 1)
    enable_fp_fusion = True
    debug = False
    arch = "Ascend910_95"


def compile_kernel(kernel, signature, constants):
    """Helper to compile a kernel to MLIR."""
    src = ASTSource(kernel, signature, constants)
    context = ir.context()
    ir.load_dialects(context)
    buffer_ir.load_dialects(context)
    ascend_ir.load_dialects(context)
    module = ast_to_ttir(kernel, src, context, Options(), {}, {})
    return str(module)


@triton.jit
def copy(
    A_ptr,
    A1_ptr,
    M: tl.constexpr,
    N: tl.constexpr,
):
    offs_a = tl.arange(0, M)[:, None]
    offs_b = tl.arange(0, N)[None, :]

    offs_c = (offs_a) * M + (offs_b)
    a_ptr = A_ptr + offs_c
    a_val = tl.load(a_ptr)
    a1_ptr = A1_ptr + offs_c
    a1_val = tl.load(a1_ptr)

    add = tl.add(a_val, a1_val)
    add_ub = bl.to_buffer(add, al.ascend_address_space.UB)

    A_l1 = bl.alloc(tl.float32, [M, N], al.ascend_address_space.L1)
    al.copy_from_ub_to_l1(add_ub, A_l1)

    A_ub = bl.alloc(tl.float32, [M, N], al.ascend_address_space.UB)
    al.copy(add_ub, A_ub)


def test_copy():
    print("=" * 60)
    print("Test 1: copy ")
    print("=" * 60)
    mlir = compile_kernel(
        copy,
        {"A_ptr": "*fp32", "A1_ptr": "*fp32"},
        {"M": 16, "N": 16},
    )
    print(f"✅ Generated MLIR ({len(mlir)} chars):\n")
    print(mlir)

# ============== Main for manual testing ==============
if __name__ == "__main__":
    test_copy()