import os
from datetime import datetime
from pathlib import Path
from typing import TYPE_CHECKING, List

from filelock import FileLock
from git import Repo
from typer import Argument, Option, Typer, echo

from joint_teapot.config import Settings, set_settings, settings
from joint_teapot.teapot import Teapot
from joint_teapot.utils import joj3
from joint_teapot.utils.logger import logger, set_logger

if TYPE_CHECKING:
    import focs_gitea

app = Typer(add_completion=False)


class Tea:
    _teapot = None

    @property
    def pot(self) -> Teapot:
        if not self._teapot:
            self._teapot = Teapot()
        return self._teapot


tea = Tea()  # lazy loader


@app.command(
    "invite-to-teams", help="invite all canvas students to gitea teams by team name"
)
def add_all_canvas_students_to_teams(team_names: List[str]) -> None:
    tea.pot.add_all_canvas_students_to_teams(team_names)


@app.command(
    "create-personal-repos",
    help="create personal repos on gitea for all canvas students",
)
def create_personal_repos_for_all_canvas_students(suffix: str = Option("")) -> None:
    tea.pot.create_personal_repos_for_all_canvas_students(suffix)


@app.command("create-teams", help="create teams on gitea by canvas groups")
def create_teams_and_repos_by_canvas_groups(group_prefix: str) -> None:
    tea.pot.create_teams_and_repos_by_canvas_groups(group_prefix)


@app.command("get-public-keys", help="list all public keys on gitea")
def get_public_key_of_all_canvas_students() -> None:
    res = []
    for k, v in tea.pot.get_public_key_of_all_canvas_students().items():
        keys = "\\n".join(v)
        res.append(f"{k},{keys}")
    echo("\n".join(res))


@app.command("clone-all-repos", help="clone all gitea repos to local")
def clone_all_repos() -> None:
    tea.pot.clone_all_repos()


@app.command("create-issues", help="create issues on gitea")
def create_issue_for_repos(
    repo_names: List[str],
    title: str,
    body: str = Argument(
        ..., help="issue body, or, if --from-file is set, filepath to issue body"
    ),
    from_file: bool = Option(False, "--file/--body"),
    use_regex: bool = Option(
        False, "--regex", help="repo_names takes list of regexes if set"
    ),
) -> None:
    tea.pot.create_issue_for_repos(repo_names, title, body, from_file, use_regex)


@app.command("create-comment", help="create a comment for an issue on gitea")
def create_comment(
    repo_name: str,
    index: int,
    body: str = Argument(..., help="comment body"),
) -> None:
    tea.pot.create_comment(repo_name, index, body)


@app.command("create-milestones", help="create milestones on gitea")
def create_milestone_for_repos(
    repo_names: List[str], title: str, description: str, due_on: datetime
) -> None:
    tea.pot.create_milestone_for_repos(repo_names, title, description, due_on)


@app.command("check-issues", help="check the existence of issue by title on gitea")
def check_exist_issue_by_title(repo_names: List[str], title: str) -> None:
    echo("\n".join(tea.pot.check_exist_issue_by_title(repo_names, title)))


@app.command(
    "checkout-releases",
    help="checkout git repo to git tag fetched from gitea by release name, with due date",
)
def checkout_to_repos_by_release_name(
    repo_names: List[str], release_name: str, due: datetime = Argument("3000-01-01")
) -> None:
    failed_repos = []
    succeed_repos = []
    for repo_name in repo_names:
        succeed = tea.pot.checkout_to_repo_by_release_name(repo_name, release_name, due)
        if not succeed:
            failed_repos.append(repo_name)
        else:
            succeed_repos.append(repo_name)
    echo(f"succeed repos: {succeed_repos}")
    echo(f"failed repos: {failed_repos}")


@app.command(
    "close-all-issues", help="close all issues and pull requests in gitea organization"
)
def close_all_issues() -> None:
    tea.pot.gitea.close_all_issues()


@app.command("archive-all-repos", help="archive all repos in gitea organization")
def archive_all_repos() -> None:
    tea.pot.gitea.archive_all_repos()


@app.command("unwatch-all-repos", help="unwatch all repos in gitea organization")
def unwatch_all_repos() -> None:
    tea.pot.gitea.unwatch_all_repos()


@app.command("get-no-collaborator-repos", help="list all repos with no collaborators")
def get_no_collaborator_repos() -> None:
    tea.pot.gitea.get_no_collaborator_repos()


@app.command("get-repos-status", help="list status of all repos with conditions")
def get_repos_status(
    commit_lt: int = Argument(100000, help="commit count less than"),
    issue_lt: int = Argument(100000, help="issue count less than"),
) -> None:
    tea.pot.get_repos_status(commit_lt, issue_lt)


@app.command(
    "prepare-assignment-dir",
    help='prepare assignment dir from extracted canvas "Download Submissions" zip',
)
def prepare_assignment_dir(dir_or_zip_file: Path) -> None:
    tea.pot.canvas.prepare_assignment_dir(str(dir_or_zip_file))


@app.command(
    "upload-assignment-grades",
    help="upload assignment grades to canvas from grade file (GRADE.txt by default), "
    + "read the first line as grade, the rest as comments",
)
def upload_assignment_grades(assignments_dir: Path, assignment_name: str) -> None:
    tea.pot.canvas.upload_assignment_grades(str(assignments_dir), assignment_name)


@app.command(
    "create-channels-on-mm",
    help="create channels for student groups according to group information on"
    " gitea",
)
def create_channels_on_mm(
    prefix: str = Option(""),
    suffix: str = Option(""),
    invite_teaching_team: bool = Option(False),
) -> None:
    groups = {
        group_name: members
        for group_name, members in tea.pot.gitea.get_all_teams().items()
        if group_name.startswith(prefix)
    }
    logger.info(
        f"{len(groups)} channel(s) to be created"
        + (f" with suffix {suffix}" if suffix else "")
        + (", inviting teaching team" if invite_teaching_team else "")
        + f": {','.join(groups.keys())}"
    )
    tea.pot.mattermost.create_channels_for_groups(groups, suffix, invite_teaching_team)


@app.command(
    "create-webhooks-for-mm",
    help="create a pair of webhooks on gitea and mm for all student groups on gitea, "
    "and configure them so that updates on gitea will be pushed to the mm channel",
)
def create_webhooks_for_mm(prefix: str = Argument("")) -> None:
    repo_names = [
        group_name
        for group_name in tea.pot.gitea.get_all_teams()
        if group_name.startswith(prefix)
    ]
    logger.info(f"{len(repo_names)} pair(s) of webhooks to be created: {repo_names}")
    tea.pot.mattermost.create_webhooks_for_repos(repo_names, tea.pot.gitea)


@app.command(
    "unsubscribe-from-repos",
    help="unsubscribe from all repos whose name match the given regex pattern",
)
def unsubscribe_from_repos(pattern: str = Argument("")) -> None:
    tea.pot.gitea.unsubscribe_from_repos(pattern)


@app.command(
    "joj3-scoreboard",
    help="parse JOJ3 score json file into scoreboard and upload to gitea",
)
def joj3_scoreboard(
    env_path: str = Argument("", help="path to .env file"),
    score_file_path: str = Argument(
        "", help="path to score json file generated by JOJ3"
    ),
    submitter: str = Argument("", help="submitter ID"),
    repo_name: str = Argument(
        "",
        help="name of grading repo to push scoreboard file",
    ),
    submitter_repo_name: str = Argument(
        "",
        help="repository's name of the submitter",
    ),
    run_number: str = Argument(
        "",
        help="gitea actions run number",
    ),
    scoreboard_file_name: str = Argument(
        "scoreboard.csv", help="name of scoreboard file in the gitea repo"
    ),
    exercise_name: str = Argument(
        "unknown",
        help="name of the exercise that appears on the issue title",
    ),
    commit_hash: str = Argument(
        "",
        help="commit hash that triggers gitea actions",
    ),
) -> None:
    set_settings(Settings(_env_file=env_path))
    set_logger(settings.stderr_log_level, diagnose=False, backtrace=False)
    logger.info(f"debug log to file: {settings.log_file_path}")
    if joj3.check_skipped(score_file_path, "skip-scoreboard"):
        return
    tea.pot.git  # trigger lazy load
    lock_file_path = os.path.join(
        settings.repos_dir, repo_name, settings.joj3_lock_file_path
    )
    logger.info(
        f"try to acquire lock, file path: {lock_file_path}, "
        + f"timeout: {settings.joj3_lock_file_timeout}"
    )
    with FileLock(lock_file_path, timeout=settings.joj3_lock_file_timeout).acquire():
        logger.info("file lock acquired")
        repo_path = tea.pot.git.repo_clean_and_checkout(repo_name, "grading")
        repo: Repo = tea.pot.git.get_repo(repo_name)
        if "grading" not in repo.remote().refs:
            logger.error(
                '"grading" branch not found in remote, create and push it to origin first.'
            )
            return
        if "grading" not in repo.branches:
            logger.error('"grading" branch not found in local, create it first.')
            return
        repo.git.reset("--hard", "origin/grading")
        joj3.generate_scoreboard(
            score_file_path,
            submitter,
            os.path.join(repo_path, scoreboard_file_name),
            exercise_name,
        )
        actions_link = (
            f"https://{settings.gitea_domain_name}{settings.gitea_suffix}/"
            + f"{settings.gitea_org_name}/{submitter_repo_name}/"
            + f"actions/runs/{run_number}"
        )
        commit_message = (
            f"joj3: update scoreboard by @{submitter} in "
            + f"{settings.gitea_org_name}/{submitter_repo_name}@{commit_hash}\n\n"
            + f"gitea actions link: {actions_link}"
        )
        tea.pot.git.add_commit(repo_name, [scoreboard_file_name], commit_message)
        tea.pot.git.push(repo_name)


@app.command(
    "joj3-failed-table",
    help="parse JOJ3 score json file into failed table markdown file and upload to gitea",
)
def joj3_failed_table(
    env_path: str = Argument("", help="path to .env file"),
    score_file_path: str = Argument(
        "", help="path to score json file generated by JOJ3"
    ),
    submitter: str = Argument("", help="submitter ID"),
    repo_name: str = Argument(
        "",
        help="name of grading repo to push failed table file",
    ),
    submitter_repo_name: str = Argument(
        "",
        help="repository's name of the submitter",
    ),
    run_number: str = Argument(
        "",
        help="gitea actions run number",
    ),
    failed_table_file_name: str = Argument(
        "failed-table.md", help="name of failed table file in the gitea repo"
    ),
    exercise_name: str = Argument(
        "unknown",
        help="name of the exercise that appears on the issue title",
    ),
    commit_hash: str = Argument(
        "",
        help="commit hash that triggers gitea actions",
    ),
) -> None:
    set_settings(Settings(_env_file=env_path))
    set_logger(settings.stderr_log_level, diagnose=False, backtrace=False)
    logger.info(f"debug log to file: {settings.log_file_path}")
    if joj3.check_skipped(score_file_path, "skip-failed-table"):
        return
    tea.pot.git  # trigger lazy load
    lock_file_path = os.path.join(
        settings.repos_dir, repo_name, settings.joj3_lock_file_path
    )
    logger.info(
        f"try to acquire lock, file path: {lock_file_path}, "
        + f"timeout: {settings.joj3_lock_file_timeout}"
    )
    with FileLock(lock_file_path, timeout=settings.joj3_lock_file_timeout).acquire():
        logger.info("file lock acquired")
        repo_path = tea.pot.git.repo_clean_and_checkout(repo_name, "grading")
        repo: Repo = tea.pot.git.get_repo(repo_name)
        if "grading" not in repo.remote().refs:
            logger.error(
                '"grading" branch not found in remote, create and push it to origin first.'
            )
            return
        if "grading" not in repo.branches:
            logger.error('"grading" branch not found in local, create it first.')
            return
        repo.git.reset("--hard", "origin/grading")
        submitter_repo_link = (
            f"https://{settings.gitea_domain_name}{settings.gitea_suffix}/"
            + f"{settings.gitea_org_name}/{submitter_repo_name}"
        )
        actions_link = (
            f"https://{settings.gitea_domain_name}{settings.gitea_suffix}/"
            + f"{settings.gitea_org_name}/{submitter_repo_name}/"
            + f"actions/runs/{run_number}"
        )
        joj3.generate_failed_table(
            score_file_path,
            submitter_repo_name,
            submitter_repo_link,
            os.path.join(repo_path, failed_table_file_name),
            actions_link,
        )
        commit_message = (
            f"joj3: update failed table by @{submitter} in "
            + f"{settings.gitea_org_name}/{submitter_repo_name}@{commit_hash}\n\n"
            + f"gitea actions link: {actions_link}"
        )
        tea.pot.git.add_commit(repo_name, [failed_table_file_name], commit_message)
        tea.pot.git.push(repo_name)


@app.command(
    "joj3-create-result-issue",
    help="create result issue on gitea",
)
def joj3_create_result_issue(
    env_path: str = Argument("", help="path to .env file"),
    score_file_path: str = Argument(
        "", help="path to score json file generated by JOJ3"
    ),
    submitter_repo_name: str = Argument(
        "",
        help="repository's name of the submitter",
    ),
    run_number: str = Argument(
        "",
        help="gitea actions run number",
    ),
    exercise_name: str = Argument(
        "unknown",
        help="name of the exercise that appears on the issue title",
    ),
    submitter: str = Argument("", help="submitter ID"),
    commit_hash: str = Argument(
        "",
        help="commit hash that triggers gitea actions",
    ),
) -> None:
    set_settings(Settings(_env_file=env_path))
    set_logger(settings.stderr_log_level, diagnose=False, backtrace=False)
    logger.info(f"debug log to file: {settings.log_file_path}")
    if joj3.check_skipped(score_file_path, "skip-result-issue"):
        return
    actions_link = (
        f"https://{settings.gitea_domain_name}{settings.gitea_suffix}/"
        + f"{settings.gitea_org_name}/{submitter_repo_name}/"
        + f"actions/runs/{run_number}"
    )
    title, comment = joj3.generate_title_and_comment(
        score_file_path,
        actions_link,
        run_number,
        exercise_name,
        submitter,
        commit_hash,
    )
    tea.pot.gitea.create_issue(submitter_repo_name, title, comment, False)


@app.command(
    "joj3-all",
    help="run all joj3 tasks",
)
def joj3_all(
    env_path: str = Argument("", help="path to .env file"),
    score_file_path: str = Argument(
        "", help="path to score json file generated by JOJ3"
    ),
    submitter: str = Argument("", help="submitter ID"),
    repo_name: str = Argument(
        "",
        help="name of grading repo to push failed table file",
    ),
    submitter_repo_name: str = Argument(
        "",
        help="repository's name of the submitter",
    ),
    run_number: str = Argument(
        "",
        help="gitea actions run number",
    ),
    scoreboard_file_name: str = Argument(
        "scoreboard.csv", help="name of scoreboard file in the gitea repo"
    ),
    failed_table_file_name: str = Argument(
        "failed-table.md", help="name of failed table file in the gitea repo"
    ),
    exercise_name: str = Argument(
        "unknown",
        help="name of the exercise that appears on the issue title",
    ),
    commit_hash: str = Argument(
        "",
        help="commit hash that triggers gitea actions",
    ),
    skip_result_issue: bool = Option(
        False,
        help="skip creating result issue on gitea",
    ),
    skip_scoreboard: bool = Option(
        False,
        help="skip creating scoreboard on gitea",
    ),
    skip_failed_table: bool = Option(
        False,
        help="skip creating failed table on gitea",
    ),
) -> None:
    set_settings(Settings(_env_file=env_path))
    set_logger(settings.stderr_log_level, diagnose=False, backtrace=False)
    logger.info(f"debug log to file: {settings.log_file_path}")
    actions_url = (
        f"https://{settings.gitea_domain_name}{settings.gitea_suffix}/"
        + f"{settings.gitea_org_name}/{submitter_repo_name}/"
        + f"actions/runs/{run_number}"
    )
    submitter_repo_url = (
        f"https://{settings.gitea_domain_name}{settings.gitea_suffix}/"
        + f"{settings.gitea_org_name}/{submitter_repo_name}"
    )
    gitea_issue_url = ""
    if not skip_result_issue:
        title, comment = joj3.generate_title_and_comment(
            score_file_path,
            actions_url,
            run_number,
            exercise_name,
            submitter,
            commit_hash,
        )
        title_prefix = joj3.get_title_prefix(title)
        joj3_issue: focs_gitea.Issue
        issue: focs_gitea.Issue
        for issue in tea.pot.gitea.issue_api.issue_list_issues(
            tea.pot.gitea.org_name, submitter_repo_name, state="all"
        ):
            if issue.title.startswith(title_prefix):
                joj3_issue = issue
                break
        else:
            joj3_issue = tea.pot.gitea.issue_api.issue_create_issue(
                tea.pot.gitea.org_name,
                submitter_repo_name,
                body={"title": title, "body": ""},
            )
        gitea_issue_url = issue.html_url
        logger.info(f"gitea issue url: {gitea_issue_url}")
        tea.pot.gitea.issue_api.issue_edit_issue(
            tea.pot.gitea.org_name,
            submitter_repo_name,
            joj3_issue.number,
            body={"body": comment},
        )
    if skip_scoreboard and skip_failed_table:
        return
    tea.pot.git  # trigger lazy load
    lock_file_path = os.path.join(
        settings.repos_dir, repo_name, settings.joj3_lock_file_path
    )
    logger.info(
        f"try to acquire lock, file path: {lock_file_path}, "
        + f"timeout: {settings.joj3_lock_file_timeout}"
    )
    with FileLock(lock_file_path, timeout=settings.joj3_lock_file_timeout).acquire():
        logger.info("file lock acquired")
        repo_path = tea.pot.git.repo_clean_and_checkout(repo_name, "grading")
        repo: Repo = tea.pot.git.get_repo(repo_name)
        if "grading" not in repo.remote().refs:
            logger.error(
                '"grading" branch not found in remote, create and push it to origin first.'
            )
            return
        if "grading" not in repo.branches:
            logger.error('"grading" branch not found in local, create it first.')
            return
        repo.git.reset("--hard", "origin/grading")
        if not skip_scoreboard:
            joj3.generate_scoreboard(
                score_file_path,
                submitter,
                os.path.join(repo_path, scoreboard_file_name),
                exercise_name,
            )
            tea.pot.git.add_commit(
                repo_name,
                [scoreboard_file_name],
                (
                    f"joj3: update scoreboard by @{submitter} in "
                    f"{settings.gitea_org_name}/{submitter_repo_name}@{commit_hash}\n\n"
                    f"gitea actions link: {actions_url}\n"
                    f"gitea issue link: {gitea_issue_url}"
                ),
            )
        if not skip_failed_table:
            joj3.generate_failed_table(
                score_file_path,
                submitter_repo_name,
                submitter_repo_url,
                os.path.join(repo_path, failed_table_file_name),
                actions_url,
            )
            tea.pot.git.add_commit(
                repo_name,
                [failed_table_file_name],
                (
                    f"joj3: update failed table by @{submitter} in "
                    f"{settings.gitea_org_name}/{submitter_repo_name}@{commit_hash}\n\n"
                    f"gitea actions link: {actions_url}"
                    f"gitea issue link: {gitea_issue_url}"
                ),
            )
        tea.pot.git.push(repo_name)


if __name__ == "__main__":
    try:
        app()
    except Exception:
        logger.exception("Unexpected error:")