# Copyright 2013-2023 Lawrence Livermore National Security, LLC and other
# Spack Project Developers. See the top-level COPYRIGHT file for details.
#
# SPDX-License-Identifier: (Apache-2.0 OR MIT)

import socket

from spack.package import *


class Chai(CachedCMakePackage, CudaPackage, ROCmPackage):
    """
    Copy-hiding array interface for data migration between memory spaces
    """

    homepage = "https://github.com/LLNL/CHAI"
    git = "https://github.com/LLNL/CHAI.git"
    tags = ["ecp", "e4s", "radiuss"]

    maintainers("davidbeckingsale")

    license("BSD-3-Clause")

    version("develop", branch="develop", submodules=False)
    version("main", branch="main", submodules=False)
    version(
        "2022.03.0",
        tag="v2022.03.0",
        commit="f0b809de1ac194376866b3ac0f5933d4146ec09e",
        submodules=False,
    )
    version(
        "2.4.0", tag="v2.4.0", commit="77d22da28187245a2c5454cf471c0c352bd98ad7", submodules=True
    )
    version(
        "2.3.0", tag="v2.3.0", commit="42f3fbcc0b966227b40b4467dc919a4c24f07196", submodules=True
    )
    version(
        "2.2.2", tag="v2.2.2", commit="56e75fc0f805b2746f3992af0c00c474513e3b24", submodules=True
    )
    version(
        "2.2.1", tag="v2.2.1", commit="c912f583828ea5963850816e3e232cc45608ccf7", submodules=True
    )
    version(
        "2.2.0", tag="v2.2.0", commit="18536c61a4817db6b3b3025f35e2dd3ae532330c", submodules=True
    )
    version(
        "2.1.1", tag="v2.1.1", commit="496911e00d15c350560860f7964cd5fb5ab7f515", submodules=True
    )
    version(
        "2.1.0", tag="v2.1.0", commit="fff02768068a64970b34760a1041585319edee87", submodules=True
    )
    version(
        "2.0.0", tag="v2.0.0", commit="63139cf45443b1266950826b165e042c7679b557", submodules=True
    )
    version(
        "1.2.0", tag="v1.2.0", commit="7bb5bc12e4508db45910d8e2b98444687da7ebf6", submodules=True
    )
    version(
        "1.1.0", tag="v1.1.0", commit="907d5f40d653a73955387067799913397807adf3", submodules=True
    )
    version("1.0", tag="v1.0", commit="501a098ad879dc8deb4a74fcfe8c08c283a10627", submodules=True)

    variant("enable_pick", default=False, description="Enable pick method")
    variant("shared", default=True, description="Build Shared Libs")
    variant("raja", default=False, description="Build plugin for RAJA")
    variant("benchmarks", default=False, description="Build benchmarks.")
    variant("examples", default=True, description="Build examples.")
    variant("openmp", default=False, description="Build using OpenMP")
    # TODO: figure out gtest dependency and then set this default True
    # and remove the +tests conflict below.
    variant("tests", default=False, description="Build tests")

    depends_on("cmake@3.8:", type="build")
    depends_on("cmake@3.9:", type="build", when="+cuda")
    depends_on("cmake@3.14:", when="@2022.03.0:")

    depends_on("blt@0.5.0:", type="build", when="@2022.03.0:")
    depends_on("blt@0.4.1:", type="build", when="@2.4.0:")
    depends_on("blt@0.4.0:", type="build", when="@2.3.0")
    depends_on("blt@0.3.6:", type="build", when="@:2.2.2")
    conflicts("^blt@:0.3.6", when="+rocm")

    depends_on("umpire")
    depends_on("umpire@2022.03.0:", when="@2022.03.0:")
    depends_on("umpire@6.0.0", when="@2.4.0")
    depends_on("umpire@4.1.2", when="@2.2.0:2.3.0")
    depends_on("umpire@main", when="@main")

    with when("+cuda"):
        depends_on("umpire+cuda")
        for sm_ in CudaPackage.cuda_arch_values:
            depends_on("umpire+cuda cuda_arch={0}".format(sm_), when="cuda_arch={0}".format(sm_))

    with when("+rocm"):
        depends_on("umpire+rocm")
        for arch in ROCmPackage.amdgpu_targets:
            depends_on(
                "umpire+rocm amdgpu_target={0}".format(arch), when="amdgpu_target={0}".format(arch)
            )

    with when("+raja"):
        depends_on("raja~openmp", when="~openmp")
        depends_on("raja+openmp", when="+openmp")
        depends_on("raja@0.14.0", when="@2.4.0")
        depends_on("raja@0.13.0", when="@2.3.0")
        depends_on("raja@0.12.0", when="@2.2.0:2.2.2")
        depends_on("raja@2022.03.0:", when="@2022.03.0:")
        depends_on("raja@main", when="@main")

        with when("+cuda"):
            depends_on("raja+cuda")
            for sm_ in CudaPackage.cuda_arch_values:
                depends_on("raja+cuda cuda_arch={0}".format(sm_), when="cuda_arch={0}".format(sm_))
        with when("+rocm"):
            depends_on("raja+rocm")
            for arch in ROCmPackage.amdgpu_targets:
                depends_on(
                    "raja+rocm amdgpu_target={0}".format(arch),
                    when="amdgpu_target={0}".format(arch),
                )

    conflicts("+benchmarks", when="~tests")

    def _get_sys_type(self, spec):
        sys_type = spec.architecture
        if "SYS_TYPE" in env:
            sys_type = env["SYS_TYPE"]
        return sys_type

    @property
    def cache_name(self):
        hostname = socket.gethostname()
        if "SYS_TYPE" in env:
            hostname = hostname.rstrip("1234567890")
        return "{0}-{1}-{2}@{3}.cmake".format(
            hostname,
            self._get_sys_type(self.spec),
            self.spec.compiler.name,
            self.spec.compiler.version,
        )

    def initconfig_compiler_entries(self):
        spec = self.spec
        entries = super().initconfig_compiler_entries()
        if "+rocm" in spec:
            entries.insert(0, cmake_cache_path("CMAKE_CXX_COMPILER", spec["hip"].hipcc))
        return entries

    def initconfig_hardware_entries(self):
        spec = self.spec
        entries = super().initconfig_hardware_entries()

        entries.append(cmake_cache_option("ENABLE_OPENMP", "+openmp" in spec))

        if "+cuda" in spec:
            entries.append(cmake_cache_option("ENABLE_CUDA", True))
            entries.append(cmake_cache_option("CMAKE_CUDA_SEPARABLE_COMPILATION", True))
            entries.append(cmake_cache_option("CUDA_SEPARABLE_COMPILATION", True))

            if not spec.satisfies("cuda_arch=none"):
                cuda_arch = spec.variants["cuda_arch"].value
                entries.append(cmake_cache_string("CUDA_ARCH", "sm_{0}".format(cuda_arch[0])))
                entries.append(
                    cmake_cache_string("CMAKE_CUDA_ARCHITECTURES", "{0}".format(cuda_arch[0]))
                )
                flag = "-arch sm_{0}".format(cuda_arch[0])
                entries.append(cmake_cache_string("CMAKE_CUDA_FLAGS", "{0}".format(flag)))
        else:
            entries.append(cmake_cache_option("ENABLE_CUDA", False))

        if "+rocm" in spec:
            entries.append(cmake_cache_option("ENABLE_HIP", True))
            entries.append(cmake_cache_path("HIP_ROOT_DIR", "{0}".format(spec["hip"].prefix)))
            archs = self.spec.variants["amdgpu_target"].value
            if archs != "none":
                arch_str = ",".join(archs)
                entries.append(
                    cmake_cache_string("HIP_HIPCC_FLAGS", "--amdgpu-target={0}".format(arch_str))
                )
        else:
            entries.append(cmake_cache_option("ENABLE_HIP", False))

        return entries

    def initconfig_package_entries(self):
        spec = self.spec
        entries = []

        option_prefix = "CHAI_" if spec.satisfies("@2022.03.0:") else ""

        entries.append(cmake_cache_path("BLT_SOURCE_DIR", spec["blt"].prefix))
        if "+raja" in spec:
            entries.append(cmake_cache_option("{}ENABLE_RAJA_PLUGIN".format(option_prefix), True))
            entries.append(cmake_cache_path("RAJA_DIR", spec["raja"].prefix))
        entries.append(
            cmake_cache_option("{}ENABLE_PICK".format(option_prefix), "+enable_pick" in spec)
        )
        entries.append(cmake_cache_path("umpire_DIR", spec["umpire"].prefix.share.umpire.cmake))
        entries.append(cmake_cache_option("ENABLE_TESTS", "+tests" in spec))
        entries.append(cmake_cache_option("ENABLE_BENCHMARKS", "+benchmarks" in spec))
        entries.append(
            cmake_cache_option("{}ENABLE_EXAMPLES".format(option_prefix), "+examples" in spec)
        )
        entries.append(cmake_cache_option("BUILD_SHARED_LIBS", "+shared" in spec))

        return entries

    def cmake_args(self):
        options = []
        return options