import glob
from itertools import chain
from pathlib import Path

from . import Workflow
from .mangle import _get_workflows
from .settings import GHRunners, Settings


class Validator:
    @classmethod
    def validate(cls):
        print("---Start validating Pipeline and settings---")
        workflows = _get_workflows()
        for workflow in workflows:
            print(f"Validating workflow [{workflow.name}]")

            cls.validate_file_paths_in_run_command(workflow)
            cls.validate_file_paths_in_digest_configs(workflow)
            cls.validate_requirements_txt_files(workflow)
            cls.validate_dockers(workflow)

            if workflow.event == Workflow.Event.SCHEDULE:
                cls.evaluate_check(
                    workflow.cron_schedules
                    and isinstance(workflow.cron_schedules, list),
                    f".crone_schedules str must be non-empty list of cron strings .event===SCHEDULE, provided value [{workflow.cron_schedules}]",
                    workflow.name,
                )
                for cron_schedule in workflow.cron_schedules:
                    cls.evaluate_check(
                        len(cron_schedule.split(" ")) == 5,
                        f".crone_schedules must be posix compliant cron str, e.g. '30 15 * * *', provided value [{cron_schedule}]",
                        workflow.name,
                    )
                    for cron_token in cron_schedule.split(" ")[:-1]:
                        cls.evaluate_check(
                            cron_token == "*" or str.isdigit(cron_token),
                            f".crone_schedules must be posix compliant cron str, e.g. '30 15 * * 1,3', provided value [{cron_schedule}], invalid part [{cron_token}]",
                            workflow.name,
                        )
                    days_of_weak = cron_schedule.split(" ")[-1]
                    cls.evaluate_check(
                        days_of_weak == "*"
                        or any([str.isdigit(v) for v in days_of_weak.split(",")]),
                        f".crone_schedules must be posix compliant cron str, e.g. '30 15 * * 1,3', provided value [{cron_schedule}], invalid part [{days_of_weak}]",
                        workflow.name,
                    )

            if workflow.artifacts:
                for artifact in workflow.artifacts:
                    if artifact.is_s3_artifact():
                        assert (
                            Settings.S3_ARTIFACT_PATH
                        ), "Provide S3_ARTIFACT_PATH setting in any .py file in ./ci/settings/* to be able to use s3 for artifacts"

            for job in workflow.jobs:
                if job.requires and workflow.artifacts:
                    for require in job.requires:
                        if (
                            require in workflow.artifacts
                            and workflow.artifacts[require].is_s3_artifact()
                        ):
                            assert not any(
                                [r in GHRunners for r in job.runs_on]
                            ), f"GH runners [{job.name}:{job.runs_on}] must not be used with S3 as artifact storage"

                if job.allow_merge_on_failure:
                    assert (
                        workflow.enable_merge_ready_status
                    ), f"Job property allow_merge_on_failure must be used only with enabled workflow.enable_merge_ready_status, workflow [{workflow.name}], job [{job.name}]"

            if workflow.enable_cache:
                assert (
                    Settings.CI_CONFIG_RUNS_ON
                ), f"Runner label to run workflow config job must be provided via CACHE_CONFIG_RUNS_ON setting if enable_cache=True, workflow [{workflow.name}]"

                assert (
                    Settings.CACHE_S3_PATH
                ), f"CACHE_S3_PATH Setting must be defined if enable_cache=True, workflow [{workflow.name}]"

            if workflow.dockers:
                cls.evaluate_check(
                    Settings.DOCKER_BUILD_RUNS_ON,
                    f"DOCKER_BUILD_RUNS_ON settings must be defined if workflow has dockers",
                    workflow_name=workflow.name,
                )

            if workflow.enable_report:
                assert (
                    Settings.HTML_S3_PATH
                ), f"HTML_S3_PATH Setting must be defined if enable_html=True, workflow [{workflow.name}]"
                assert (
                    Settings.S3_BUCKET_TO_HTTP_ENDPOINT
                ), f"S3_BUCKET_TO_HTTP_ENDPOINT Setting must be defined if enable_html=True, workflow [{workflow.name}]"
                assert (
                    Settings.HTML_S3_PATH.split("/")[0]
                    in Settings.S3_BUCKET_TO_HTTP_ENDPOINT
                ), f"S3_BUCKET_TO_HTTP_ENDPOINT Setting must include bucket name [{Settings.HTML_S3_PATH}] from HTML_S3_PATH, workflow [{workflow.name}]"

            if workflow.enable_cache:
                for artifact in workflow.artifacts or []:
                    assert (
                        artifact.is_s3_artifact()
                    ), f"All artifacts must be of S3 type if enable_cache|enable_html=True, artifact [{artifact.name}], type [{artifact.type}], workflow [{workflow.name}]"

            if workflow.dockers:
                assert (
                    Settings.DOCKERHUB_USERNAME
                ), f"Settings.DOCKERHUB_USERNAME must be provided if workflow has dockers, workflow [{workflow.name}]"
                assert (
                    Settings.DOCKERHUB_SECRET
                ), f"Settings.DOCKERHUB_SECRET must be provided if workflow has dockers, workflow [{workflow.name}]"
                assert workflow.get_secret(
                    Settings.DOCKERHUB_SECRET
                ), f"Secret [{Settings.DOCKERHUB_SECRET}] must have configuration in workflow.secrets, workflow [{workflow.name}]"

            if (
                workflow.enable_cache
                or workflow.enable_report
                or workflow.enable_merge_ready_status
            ):
                for job in workflow.jobs:
                    assert not any(
                        job in ("ubuntu-latest",) for job in job.runs_on
                    ), f"GitHub Runners must not be used for workflow with enabled: workflow.enable_cache, workflow.enable_html or workflow.enable_merge_ready_status as s3 access is required, workflow [{workflow.name}], job [{job.name}]"

            if workflow.enable_cidb:
                assert (
                    Settings.SECRET_CI_DB_URL
                ), f"Settings.CI_DB_URL_SECRET must be provided if workflow.enable_cidb=True, workflow [{workflow.name}]"
                assert (
                    Settings.SECRET_CI_DB_PASSWORD
                ), f"Settings.CI_DB_PASSWORD_SECRET must be provided if workflow.enable_cidb=True, workflow [{workflow.name}]"
                assert (
                    Settings.CI_DB_DB_NAME
                ), f"Settings.CI_DB_DB_NAME must be provided if workflow.enable_cidb=True, workflow [{workflow.name}]"
                assert (
                    Settings.CI_DB_TABLE_NAME
                ), f"Settings.CI_DB_TABLE_NAME must be provided if workflow.enable_cidb=True, workflow [{workflow.name}]"

    @classmethod
    def validate_file_paths_in_run_command(cls, workflow: Workflow.Config) -> None:
        if not Settings.VALIDATE_FILE_PATHS:
            return
        for job in workflow.jobs:
            run_command = job.command
            command_parts = run_command.split(" ")
            for part in command_parts:
                if ">" in part:
                    return
                if "/" in part:
                    assert (
                        Path(part).is_file() or Path(part).is_dir()
                    ), f"Apparently run command [{run_command}] for job [{job}] has invalid path [{part}]. Setting to disable check: VALIDATE_FILE_PATHS"

    @classmethod
    def validate_file_paths_in_digest_configs(cls, workflow: Workflow.Config) -> None:
        if not Settings.VALIDATE_FILE_PATHS:
            return
        for job in workflow.jobs:
            if not job.digest_config:
                continue
            for include_path in chain(
                job.digest_config.include_paths, job.digest_config.exclude_paths
            ):
                if "*" in include_path:
                    assert glob.glob(
                        include_path, recursive=True
                    ), f"Apparently file glob [{include_path}] in job [{job.name}] digest_config [{job.digest_config}] invalid, workflow [{workflow.name}]. Setting to disable check: VALIDATE_FILE_PATHS"
                else:
                    assert (
                        Path(include_path).is_file() or Path(include_path).is_dir()
                    ), f"Apparently file path [{include_path}] in job [{job.name}] digest_config [{job.digest_config}] invalid, workflow [{workflow.name}]. Setting to disable check: VALIDATE_FILE_PATHS"

    @classmethod
    def validate_requirements_txt_files(cls, workflow: Workflow.Config) -> None:
        for job in workflow.jobs:
            if job.job_requirements:
                if job.job_requirements.python_requirements_txt:
                    path = Path(job.job_requirements.python_requirements_txt)
                    message = f"File with py requirement [{path}] does not exist"
                    if job.name in (
                        Settings.DOCKER_BUILD_JOB_NAME,
                        Settings.CI_CONFIG_JOB_NAME,
                        Settings.FINISH_WORKFLOW_JOB_NAME,
                    ):
                        message += '\n  If all requirements already installed on your runners - add setting INSTALL_PYTHON_REQS_FOR_NATIVE_JOBS""'
                        message += "\n  If requirements needs to be installed - add requirements file (Settings.INSTALL_PYTHON_REQS_FOR_NATIVE_JOBS):"
                        message += "\n      echo jwt==1.3.1 > ./ci/requirements.txt"
                        message += (
                            "\n      echo requests==2.32.3 >> ./ci/requirements.txt"
                        )
                        message += "\n      echo https://clickhouse-builds.s3.amazonaws.com/packages/praktika-0.1-py3-none-any.whl >> ./ci/requirements.txt"
                    cls.evaluate_check(path.is_file(), message, job.name, workflow.name)

    @classmethod
    def validate_dockers(cls, workflow: Workflow.Config):
        names = []
        for docker in workflow.dockers:
            cls.evaluate_check(
                docker.name not in names,
                f"Non uniq docker name [{docker.name}]",
                workflow_name=workflow.name,
            )
            names.append(docker.name)
        for docker in workflow.dockers:
            for docker_dep in docker.depends_on:
                cls.evaluate_check(
                    docker_dep in names,
                    f"Docker [{docker.name}] has invalid dependency [{docker_dep}]",
                    workflow_name=workflow.name,
                )

    @classmethod
    def evaluate_check(cls, check_ok, message, workflow_name, job_name=""):
        message = message.split("\n")
        messages = [message] if not isinstance(message, list) else message
        if check_ok:
            return
        else:
            print(
                f"ERROR: Config validation failed: workflow [{workflow_name}], job [{job_name}]:"
            )
            for message in messages:
                print(" ||  " + message)
            raise