#!/usr/bin/python3
# Copyright Advanced Micro Devices, Inc., or its affiliates.
# SPDX-License-Identifier: MIT

import os
import platform
import subprocess
import argparse
import pathlib

args = {}
OS_info = {}


# yapf: disable
def parse_args():
    """Parse command-line arguments"""
    global OS_info

    parser = argparse.ArgumentParser(description="""Checks build arguments""")
    general_opts = parser.add_argument_group('General Build Options')

    general_opts.add_argument(      '--build_dir', type=str, required=False, default = "build",
                        help='Specify path to configure & build process output directory.(optional, default: ./build)')

    general_opts.add_argument('-i', '--install', required=False, default=False, dest='install', action='store_true',
                        help='Generate and install library package after build. (optional, default: False)')

    return parser.parse_args()
# yapf: enable

def os_detect():
    global OS_info
    if os.name == "nt":
        OS_info["ID"] = platform.system()
    else:
        inf_file = "/etc/os-release"
        if os.path.exists(inf_file):
            with open(inf_file) as f:
                for line in f:
                    if "=" in line:
                        k, v = line.strip().split("=")
                        OS_info[k] = v.replace('"', '')

def create_dir(dir_path):
    full_path = ""
    if os.path.isabs(dir_path):
        full_path = dir_path
    else:
        full_path = os.path.join(os.getcwd(), dir_path)
    pathlib.Path(full_path).mkdir(parents=True, exist_ok=True)
    return

def delete_dir(dir_path):
    if (not os.path.exists(dir_path)):
        return
    if os.name == "nt":
        run_cmd("RMDIR", f"/S /Q {dir_path}")
    else:
        run_cmd("rm", f"-rf {dir_path}")


def cmake_path(os_path):
    if os.name == "nt":
        return os_path.replace("\\", "/")
    else:
        return os.path.realpath(os_path)

def config_cmd():
    global args
    global OS_info
    cwd_path = os.getcwd()
    cmake_executable = "cmake"
    cmake_options = []
    src_path = cmake_path(cwd_path)
    cmake_platform_opts = []
    if os.name == "nt":
        generator = f"-G Ninja"
        cmake_options.append(generator)

        # CMAKE_PREFIX_PATH set to rocm_path and HIP_PATH set BY SDK Installer
        raw_rocm_path = cmake_path(os.getenv('HIP_PATH', "C:/hip"))
        rocm_path = f'"{raw_rocm_path}"' # guard against spaces in path
        # CPACK_PACKAGING_INSTALL_PREFIX= defined as blank as it is appended to end of path for archive creation
        cmake_platform_opts.append(f"-DCPACK_PACKAGING_INSTALL_PREFIX=")
        cmake_platform_opts.append(f'-DCMAKE_INSTALL_PREFIX="C:/hipSDK"')
    else:
        rocm_raw_path = os.getenv('ROCM_PATH', "/opt/rocm")
        rocm_path = rocm_raw_path
        cmake_platform_opts.append(f"-DROCM_DIR:PATH={rocm_path} -DCPACK_PACKAGING_INSTALL_PREFIX={rocm_path}")

    print(f"Build source path: {src_path}")

    cmake_options.extend(cmake_platform_opts)

    cmake_base_options = f"-DROCM_PATH={rocm_path} -DCMAKE_PREFIX_PATH:PATH={rocm_path}"
    cmake_options.append(cmake_base_options)

    # packaging options
    cmake_pack_options = f"-DCPACK_SET_DESTDIR=OFF"
    cmake_options.append(cmake_pack_options)

    # build type
    cmake_config = ""
    build_path = os.path.realpath(args.build_dir)

    # clean
    delete_dir(build_path)

    create_dir(os.path.join(build_path))
    os.chdir(build_path)

    cmake_options.append(f"{src_path}")
    cmd_opts = " ".join(cmake_options)

    return cmake_executable, cmd_opts


def make_cmd():
    global args
    global OS_info

    make_options = []

    if os.name == "nt":
        make_executable = f"ninja.exe"
        make_options.append("all")  # for cmake "--target all" )
        if args.install:
            make_options.append("package install")  # for cmake "--target package --target install" )
    else:
        make_executable = f"make package"
        if args.install:
            make_options.append("install")
    cmd_opts = " ".join(make_options)

    return make_executable, cmd_opts


def run_cmd(exe, opts):
    program = f"{exe} {opts}"
    print(program)
    proc = subprocess.run(program, check=True, stderr=subprocess.STDOUT, shell=True)
    return proc.returncode


def main():
    global args
    os_detect()
    args = parse_args()

    print(OS_info)

    root_dir = os.curdir

    # configure
    exe, opts = config_cmd()
    if run_cmd(exe, opts):
        fatal("Configuration failed. Not continuing.")

    # make
    exe, opts = make_cmd()
    if run_cmd(exe, opts):
        fatal("Build failed. Not continuing.")


if __name__ == '__main__':
    main()