# SPDX-FileCopyrightText: 2020 Efabless Corporation
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# SPDX-License-Identifier: Apache-2.0

import argparse
import datetime
import logging
import subprocess
import sys
from pathlib import Path

import precheck_logger
from check_manager import get_check_manager, open_source_checks, private_checks
from checks.utils.utils import file_hash, get_project_config, uncompress_gds


def log_tools_info(pdk_root, tools_info_path, pdks_info_path):
    with open(tools_info_path, 'w') as tools_info:
        klayout_version = subprocess.check_output(['klayout', '-v'], encoding='utf-8').replace('KLayout', '').lstrip().rstrip()
        magic_version = subprocess.check_output(['magic', '--version'], encoding='utf-8').rstrip()
        tools_info.write(f"KLayout: {klayout_version}\n")
        tools_info.write(f"Magic: {magic_version}")
        logging.info(f"{{{{Tools Info}}}} KLayout: v{klayout_version} | Magic: v{magic_version}")
    with open(pdks_info_path, 'w') as pdks_info:
        try:
            pdk_dir = f"{pdk_root}/%s"
            open_pdks_v_cmd = ['git', '-C', pdk_dir % 'open_pdks', 'rev-parse', '--verify', 'HEAD']
            skywater_pdk_v_cmd = ['git', '-C', pdk_dir % 'skywater-pdk', 'rev-parse', '--verify', 'HEAD']
            open_pdks_version = subprocess.check_output(open_pdks_v_cmd, encoding='utf-8').rstrip()
            skywater_pdk_version = subprocess.check_output(skywater_pdk_v_cmd, encoding='utf-8').rstrip()
            pdks_info.write(f"Open PDKs {open_pdks_version}\n")
            pdks_info.write(f"Skywater PDK {skywater_pdk_version}")
            logging.info(f"{{{{PDKs Info}}}} Open PDKs: {open_pdks_version} | Skywater PDK: {skywater_pdk_version}")
        except Exception as e:
            logging.error(f"MPW Precheck failed to get Open PDKs & Skywater PDK versions: {e}")


def run_precheck_sequence(precheck_config, project_config):
    results = {}
    logging.info(f"{{{{START}}}} Precheck Started, the full log '{precheck_config['log_path'].name}' will be located in '{precheck_config['log_path'].parent}'")
    logging.info(f"{{{{PRECHECK SEQUENCE}}}} Precheck will run the following checks: {' '.join([get_check_manager(x, precheck_config, project_config).__surname__ for x in precheck_config['sequence']])}")
    for check_count, entry in enumerate(precheck_config['sequence'], start=1):
        check = get_check_manager(entry, precheck_config, project_config)
        if check:
            logging.info(f"{{{{STEP UPDATE}}}} Executing Check {check_count} of {len(precheck_config['sequence'])}: {check.__surname__}")
            results[check.__surname__] = check.run()

    logging.info(f"{{{{FINISH}}}} Executing Finished, the full log '{precheck_config['log_path'].name}' can be found in '{precheck_config['log_path'].parent}'")
    if False not in list(results.values()):
        logging.info("{{SUCCESS}} All Checks Passed !!!")
    else:
        failed_checks = [x for x in results.keys() if results[x] is False]
        logging.fatal(f"{{{{FAILURE}}}} {len(failed_checks)} Check(s) Failed: {failed_checks} !!!")
        sys.exit(2)


def main(*args, **kwargs):
    check_managers = private_checks if kwargs['private'] else open_source_checks
    precheck_config = dict(input_directory=Path(kwargs['input_directory']),
                           output_directory=Path(kwargs['output_directory']),
                           caravel_root=Path(kwargs['caravel_root']),
                           pdk_root=Path(kwargs['pdk_root']),
                           private=kwargs['private'],
                           sequence=kwargs['sequence'],
                           log_path=Path(kwargs['log_path']),
                           default_content=Path(kwargs['default_content']),
                           check_managers=check_managers)

    uncompress_gds(precheck_config['input_directory'])
    project_config = get_project_config(precheck_config['input_directory'])

    gds_info_path = precheck_config['log_path'].parent / 'gds.info'
    with open(gds_info_path, 'w') as gds_info:
        user_module_hash = file_hash(f"{precheck_config['input_directory']}/gds/{project_config['user_module']}.gds")
        gds_info.write(f"{project_config['user_module']}.gds: {user_module_hash}")
        logging.info(f"{{{{Project GDS Info}}}} {project_config['user_module']}: {user_module_hash}")

    tools_info_path = precheck_config['log_path'].parent / 'tools.info'
    pdks_info_path = precheck_config['log_path'].parent / 'pdks.info'
    log_tools_info(precheck_config['pdk_root'], tools_info_path, pdks_info_path)

    gds_file_path = precheck_config['input_directory'] / f"gds/{project_config['user_module']}.gds"
    compressed_gds_file_path = precheck_config['input_directory'] / f"gds/{project_config['user_module']}.gds.gz"
    if gds_file_path.exists() and compressed_gds_file_path.exists():
        logging.fatal("{{GDS VIOLATION}} Both a compressed and an uncompressed version the gds exist, ensure only one design file exists.")
        sys.exit(255)

    run_precheck_sequence(precheck_config=precheck_config, project_config=project_config)


if __name__ == '__main__':
    parser = argparse.ArgumentParser(description="Runs the precheck tool.")
    parser.add_argument('--input_directory', '-i', required=True, help="INPUT_DIRECTORY Absolute Path to the project.")
    parser.add_argument('--caravel_root', '-cr', required=True, help="CARAVEL_ROOT Absolute Path to caravel.")
    parser.add_argument('--pdk_root', '-p', required=True, help="PDK_ROOT, points to pdk installation path")
    parser.add_argument('--output_directory', '-o', required=False, help="Output Directory, default=<input_directory>/precheck_results/DD_MMM_YYYY___HH_MM_SS.")
    parser.add_argument('--private', action='store_true', help=f"If provided, precheck skips {open_source_checks.keys() - private_checks.keys()}  checks that qualify the project to be Open Source")
    parser.add_argument('checks', metavar='check', type=str, nargs='*', choices=list(open_source_checks.keys()).append([]), help=f"Checks to be run by the precheck: {' '.join(open_source_checks.keys())}")
    args = parser.parse_args()

    # NOTE Separated to allow the option later on for a run tag
    tag = f"{datetime.datetime.utcnow():%d_%b_%Y___%H_%M_%S}".upper()
    output_directory = args.output_directory if args.output_directory else f"{args.input_directory}/precheck_results/{tag}"
    Path(f"{output_directory}/logs").mkdir(parents=True, exist_ok=True)
    Path(f"{output_directory}/outputs").mkdir(parents=True, exist_ok=True)
    Path(f"{output_directory}/outputs/reports").mkdir(parents=True, exist_ok=True)
    log_path = Path(output_directory) / 'logs/precheck.log'
    precheck_logger.initialize_root_logger(log_path)

    if args.checks:
        sequence = args.checks
    else:
        sequence = [x for x in private_checks.keys()] if args.private else [x for x in open_source_checks.keys()]
    main(input_directory=args.input_directory,
         output_directory=output_directory,
         caravel_root=args.caravel_root,
         pdk_root=args.pdk_root,
         private=args.private,
         sequence=sequence,
         log_path=log_path,
         default_content='_default_content')