"""Development tasks."""

from __future__ import annotations

import os
import re
import sys
from contextlib import contextmanager
from functools import wraps
from importlib.metadata import version as pkgversion
from pathlib import Path
from typing import TYPE_CHECKING, Any, Callable

from duty import duty, tools

if TYPE_CHECKING:
    from collections.abc import Iterator

    from duty.context import Context


PY_SRC_PATHS = (Path(_) for _ in ("src", "tests", "duties.py", "scripts"))
PY_SRC_LIST = tuple(str(_) for _ in PY_SRC_PATHS)
PY_SRC = " ".join(PY_SRC_LIST)
CI = os.environ.get("CI", "0") in {"1", "true", "yes", ""}
WINDOWS = os.name == "nt"
PTY = not WINDOWS and not CI
MULTIRUN = os.environ.get("MULTIRUN", "0") == "1"


def pyprefix(title: str) -> str:
    if MULTIRUN:
        prefix = f"(python{sys.version_info.major}.{sys.version_info.minor})"
        return f"{prefix:14}{title}"
    return title


def not_from_insiders(func: Callable) -> Callable:
    @wraps(func)
    def wrapper(ctx: Context, *args: Any, **kwargs: Any) -> None:
        origin = ctx.run("git config --get remote.origin.url", silent=True)
        if "pawamoy-insiders/griffe" in origin:
            ctx.run(
                lambda: False,
                title="Not running this task from insiders repository (do that from public repo instead!)",
            )
            return
        func(ctx, *args, **kwargs)

    return wrapper


@contextmanager
def material_insiders() -> Iterator[bool]:
    if "+insiders" in pkgversion("mkdocs-material"):
        os.environ["MATERIAL_INSIDERS"] = "true"
        try:
            yield True
        finally:
            os.environ.pop("MATERIAL_INSIDERS")
    else:
        yield False


def _get_changelog_version() -> str:
    changelog_version_re = re.compile(r"^## \[(\d+\.\d+\.\d+)\].*$")
    with Path(__file__).parent.joinpath("CHANGELOG.md").open("r", encoding="utf8") as file:
        return next(filter(bool, map(changelog_version_re.match, file))).group(1)  # type: ignore[union-attr]


@duty
def changelog(ctx: Context, bump: str = "") -> None:
    """Update the changelog in-place with latest commits.

    Parameters:
        bump: Bump option passed to git-changelog.
    """
    ctx.run(tools.git_changelog(bump=bump or None), title="Updating changelog")
    ctx.run(tools.yore.check(bump=bump or _get_changelog_version()), title="Checking legacy code")


@duty(pre=["check-quality", "check-types", "check-docs", "check-api"])
def check(ctx: Context) -> None:
    """Check it all!"""


@duty
def check_quality(ctx: Context) -> None:
    """Check the code quality."""
    ctx.run(
        tools.ruff.check(*PY_SRC_LIST, config="config/ruff.toml"),
        title=pyprefix("Checking code quality"),
    )


@duty(skip_if=sys.version_info[:2] != (3, 12), skip_reason=pyprefix("Docs build only on Python 3.12"))
def check_docs(ctx: Context) -> None:
    """Check if the documentation builds correctly."""
    Path("htmlcov").mkdir(parents=True, exist_ok=True)
    Path("htmlcov/index.html").touch(exist_ok=True)
    with material_insiders():
        ctx.run(
            tools.mkdocs.build(strict=True, verbose=True),
            title=pyprefix("Building documentation"),
        )


@duty
def check_types(ctx: Context) -> None:
    """Check that the code is correctly typed."""
    os.environ["FORCE_COLOR"] = "1"
    ctx.run(
        tools.mypy(*PY_SRC_LIST, config_file="config/mypy.ini"),
        title=pyprefix("Type-checking"),
    )


@duty
def check_api(ctx: Context, *cli_args: str) -> None:
    """Check for API breaking changes."""
    ctx.run(
        tools.griffe.check("markdown_exec", search=["src"], color=True).add_args(*cli_args),
        title="Checking for API breaking changes",
        nofail=True,
    )


@duty
def docs(ctx: Context, *cli_args: str, host: str = "127.0.0.1", port: int = 8000) -> None:
    """Serve the documentation (localhost:8000).

    Parameters:
        host: The host to serve the docs from.
        port: The port to serve the docs on.
    """
    with material_insiders():
        ctx.run(
            tools.mkdocs.serve(dev_addr=f"{host}:{port}").add_args(*cli_args),
            title="Serving documentation",
            capture=False,
        )


@duty
def docs_deploy(ctx: Context, *, force: bool = False) -> None:
    """Deploy the documentation to GitHub pages.

    Parameters:
        force: Whether to force deployment, even from non-Insiders version.
    """
    os.environ["DEPLOY"] = "true"
    with material_insiders() as insiders:
        if not insiders:
            ctx.run(lambda: False, title="Not deploying docs without Material for MkDocs Insiders!")
        origin = ctx.run("git config --get remote.origin.url", silent=True, allow_overrides=False)
        if "pawamoy-insiders/markdown-exec" in origin:
            ctx.run(
                "git remote add upstream git@github.com:pawamoy/markdown-exec",
                silent=True,
                nofail=True,
                allow_overrides=False,
            )
            ctx.run(
                tools.mkdocs.gh_deploy(remote_name="upstream", force=True),
                title="Deploying documentation",
            )
        elif force:
            ctx.run(
                tools.mkdocs.gh_deploy(force=True),
                title="Deploying documentation",
            )
        else:
            ctx.run(
                lambda: False,
                title="Not deploying docs from public repository (do that from insiders instead!)",
                nofail=True,
            )


@duty
def format(ctx: Context) -> None:
    """Run formatting tools on the code."""
    ctx.run(
        tools.ruff.check(*PY_SRC_LIST, config="config/ruff.toml", fix_only=True, exit_zero=True),
        title="Auto-fixing code",
    )
    ctx.run(tools.ruff.format(*PY_SRC_LIST, config="config/ruff.toml"), title="Formatting code")


@duty
def build(ctx: Context) -> None:
    """Build source and wheel distributions."""
    ctx.run(
        tools.build(),
        title="Building source and wheel distributions",
        pty=PTY,
    )


@duty
@not_from_insiders
def publish(ctx: Context) -> None:
    """Publish source and wheel distributions to PyPI."""
    if not Path("dist").exists():
        ctx.run("false", title="No distribution files found")
    dists = [str(dist) for dist in Path("dist").iterdir()]
    ctx.run(
        tools.twine.upload(*dists, skip_existing=True),
        title="Publishing source and wheel distributions to PyPI",
        pty=PTY,
    )


@duty(post=["build", "publish", "docs-deploy"])
@not_from_insiders
def release(ctx: Context, version: str = "") -> None:
    """Release a new Python package.

    Parameters:
        version: The new version number to use.
    """
    if not (version := (version or input("> Version to release: ")).strip()):
        ctx.run("false", title="A version must be provided")
    ctx.run("git add pyproject.toml CHANGELOG.md", title="Staging files", pty=PTY)
    ctx.run(["git", "commit", "-m", f"chore: Prepare release {version}"], title="Committing changes", pty=PTY)
    ctx.run(f"git tag {version}", title="Tagging commit", pty=PTY)
    ctx.run("git push", title="Pushing commits", pty=False)
    ctx.run("git push --tags", title="Pushing tags", pty=False)


@duty(silent=True, aliases=["cov"])
def coverage(ctx: Context) -> None:
    """Report coverage as text and HTML."""
    ctx.run(tools.coverage.combine(), nofail=True)
    ctx.run(tools.coverage.report(rcfile="config/coverage.ini"), capture=False)
    ctx.run(tools.coverage.html(rcfile="config/coverage.ini"))


@duty
def test(ctx: Context, *cli_args: str, match: str = "") -> None:
    """Run the test suite.

    Parameters:
        match: A pytest expression to filter selected tests.
    """
    py_version = f"{sys.version_info.major}{sys.version_info.minor}"
    os.environ["COVERAGE_FILE"] = f".coverage.{py_version}"
    ctx.run(
        tools.pytest(
            "tests",
            config_file="config/pytest.ini",
            select=match,
            color="yes",
        ).add_args("-n", "auto", *cli_args),
        title=pyprefix("Running tests"),
    )