#!/usr/bin/env python3
"""Main entry point for rocprof-compute"""

##############################################################################bl
# MIT License
#
# Copyright (c) 2021 - 2025 Advanced Micro Devices, Inc. All Rights Reserved.
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.
##############################################################################el

import re
import sys
from pathlib import Path

try:
    from importlib import metadata

    from rocprof_compute_base import RocProfCompute
    from utils.logger import console_error
except ImportError as e:
    print (f"{e}")
    # In wheel package, softlink is not supported.
    # rocprof-compute will get installed in bin and libexec/rocprofiler-compute.
    # When invoked from bin folder, the extra paths are required to import the
    # dependent scripts

    try:
        current_path = Path(__file__).resolve().parent
        additional_path = current_path / "../libexec/rocprofiler-compute"
        sys.path.append(str(additional_path.resolve()))

        from importlib import metadata

        from rocprof_compute_base import RocProfCompute
        from utils.utils import console_error
    except ImportError:
        pass


def check_version(local_ver, desired_ver, operator) -> bool:
    """Check package version strings with simple operators used in companion
    requirements.txt file"""
    ops = {
        "==": lambda loc, des: loc == des,
        ">=": lambda loc, des: loc >= des,
        "<=": lambda loc, des: loc <= des,
        ">": lambda loc, des: loc > des,
        "<": lambda loc, des: loc < des,
    }
    return ops.get(operator, lambda loc, des: True)(local_ver, desired_ver)


def verify_deps() -> None:
    """Utility to read library dependencies from requirements.txt and endeavor
    to load them within current execution environment.
    Used in top-level rocprofiler-compute to provide error messages if necessary
    dependencies are not available."""

    # Check which version of python is being used
    if sys.version_info < (3, 8):
        print(
            f"[ERROR] Python 3.8 or higher is required to run rocprofiler-compute. "
            f"The current version is {sys.version_info[0]}.{sys.version_info[1]}."
        )
        sys.exit(1)

    bindir = str(Path(__file__).resolve().parent)
    deps_locations = ["requirements.txt", "../requirements.txt"]

    for location in deps_locations:
        check_file = Path(bindir).joinpath(location)
        if check_file.exists():
            dependencies = check_file.read_text(encoding="utf-8").splitlines()

            error = False
            version_pattern = re.compile(r"^([^=<>]+)([=<>]+)(.*)$")

            for dependency in dependencies:
                match = version_pattern.match(dependency)
                if match:
                    package, operator, desired_version = match.groups()
                else:
                    package, operator, desired_version = dependency, None, None

                try:
                    local_version = metadata.distribution(package).version
                except metadata.PackageNotFoundError:
                    error = True
                    print(
                        f"[ERROR] The '{dependency}' package was not found "
                        "in the current execution environment."
                    )
                    continue

                # Check version requirement
                if desired_version and not check_version(
                    local_version, desired_version, operator
                ):
                    print(
                        f"[ERROR] the '{dependency}' distribution does not meet "
                        "version requirements to use rocprofiler-compute."
                    )
                    print(f"  --> version installed : {local_version}")
                    error = True

            if error:
                print(
                    "\nPlease verify all of the python dependencies called out "
                    "in the requirements file"
                )
                print("are installed locally prior to running rocprofiler-compute.")
                print(f"\nSee: {check_file}")
                sys.exit(1)
            return


def main() -> None:
    """Main function for rocprofiler-compute"""

    # verify required python dependencies
    verify_deps()

    rocprof_compute = RocProfCompute()
    mode = rocprof_compute.get_mode()

    # major rocprofiler-compute execution modes
    if mode == "profile":
        rocprof_compute.run_profiler()
    elif mode == "analyze":
        rocprof_compute.run_analysis()
    else:
        console_error("Unsupported execution mode")

    sys.exit(0)


if __name__ == "__main__":
    main()