"""JitPack commit pins: "newest" is the source repo's default-branch HEAD.

The fail-green case here is a hash the version parser cannot read: `behind`
returns False for unparseable input, so without its own ecosystem a moved
default branch would pass silently. Every path below is pinned down.
"""

from __future__ import annotations

import subprocess
from pathlib import Path

import pytest

from dep_freshness.cache import ttl_for
from dep_freshness.evaluate import judge
from dep_freshness.models import Dep, Severity
from dep_freshness.parsers import gradle
from dep_freshness.registries import _git, gitcommit
from dep_freshness.registries.http import Offline
from dep_freshness.resolve import _LOOKUP, Answer
from dep_freshness.tests.conftest import write

HEAD = "844a07002c3d2f2b68a6b26a25e8e401777c73e7"
SIDE = "c80135339b6f4c2d8e1a7b3f9d0e5c6a2b4d8f10"


@pytest.fixture
def ls_remote(monkeypatch):
    monkeypatch.setattr(_git, "host_reachable", lambda _url: True)
    calls: list[list[str]] = []

    def install(stdout="", returncode=0, error=None):
        def fake_run(args, **_kwargs):
            calls.append(args)
            if error:
                raise error
            return subprocess.CompletedProcess(args, returncode, stdout, "")

        monkeypatch.setattr(subprocess, "run", fake_run)
        return calls

    return install


@pytest.mark.parametrize(
    "name,expected",
    [
        ("com.github.mihonapp:image-decoder", "mihonapp/image-decoder"),
        ("com.github.arkon.FlexibleAdapter:flexible-adapter", "arkon/FlexibleAdapter"),
        ("com.github.zhanghai.quickjs-java:quickjs-android", "zhanghai/quickjs-java"),
        ("com.github.owner.repo.deeper:module", "owner/repo"),
        ("com.github.owner.:module", "owner/module"),
        ("io.coil-kt:coil", None),
        ("com.github.:module", None),
        ("com.github.owner", None),
        ("com.github.owner:", None),
    ],
)
def test_the_github_repo_behind_a_jitpack_coordinate(name, expected):
    assert gitcommit.source_repo(name) == expected


def test_latest_lists_every_branch_head_default_first(ls_remote):
    calls = ls_remote(
        f"{SIDE}\trefs/heads/fix-build2\n{HEAD}\tHEAD\n{HEAD}\trefs/heads/master\n"
        f"{SIDE}\trefs/pull/1/head\n"
    )
    assert (
        gitcommit.latest("com.github.arkon.FlexibleAdapter:flexible-adapter")
        == f"{HEAD} {SIDE}"
    )
    assert calls[-1] == ["git", "ls-remote", "https://github.com/arkon/FlexibleAdapter"]


def test_a_repo_with_no_default_head_still_lists_its_branches(ls_remote):
    ls_remote(f"{SIDE}\trefs/heads/dev\n")
    assert gitcommit.latest("com.github.mihonapp:image-decoder") == SIDE


def test_no_head_line_means_no_answer(ls_remote):
    ls_remote("\n  \nabc\trefs/tags/v1\n")
    assert gitcommit.latest("com.github.mihonapp:image-decoder") is None


def test_a_non_jitpack_coordinate_never_touches_git(ls_remote):
    calls = ls_remote(f"{HEAD}\tHEAD\n")
    assert gitcommit.latest("io.coil-kt:coil") is None
    assert calls == []


def test_ls_remote_failures_degrade_to_offline(ls_remote, monkeypatch):
    ls_remote(returncode=128)
    with pytest.raises(Offline):
        gitcommit.latest("com.github.mihon:unifile")
    ls_remote(error=OSError("no git"))
    with pytest.raises(Offline):
        gitcommit.latest("com.github.mihon:unifile")
    monkeypatch.setattr(_git, "host_reachable", lambda _url: False)
    with pytest.raises(Offline):
        gitcommit.latest("com.github.mihon:unifile")


CATALOG = """\
[versions]
unifile = "08f224c8f9"
photoView = "2.3.0"
tagged = "abc1234"

[libraries]
unifile = { module = "com.github.mihon:unifile", version.ref = "unifile" }
photoView = { module = "com.github.chrisbanes:PhotoView", version.ref = "photoView" }
inline = "com.github.mihonapp:image-decoder:e03b81e18a"
central = { module = "io.coil-kt:coil", version = "deadbeef" }
short = { module = "com.github.o:r", version = "abc12" }
tagged = { module = "org.example:lib", version.ref = "tagged" }
"""


def test_the_catalog_parser_tells_commit_pins_from_versions(tmp_path):
    deps = {
        d.name: d
        for d in gradle.parse_catalog(write(tmp_path, "libs.versions.toml", CATALOG))
    }
    assert (
        deps["com.github.mihon:unifile"].ecosystem,
        deps["com.github.mihon:unifile"].pinned,
    ) == (
        "gitcommit",
        "08f224c8f9",
    )
    assert deps["com.github.mihonapp:image-decoder"].ecosystem == "gitcommit"
    assert deps["com.github.chrisbanes:PhotoView"].ecosystem == "maven"
    assert deps["com.github.chrisbanes:PhotoView"].pinned == "2.3.0"
    # A hash-shaped version outside com.github.* is still a Maven version
    # (an unpinned one, since it is not exact), and six hex digits is too few.
    assert deps["io.coil-kt:coil"].ecosystem == "maven"
    assert deps["io.coil-kt:coil"].pinned is None
    assert deps["com.github.o:r"].ecosystem == "maven"
    assert deps["org.example:lib"].ecosystem == "maven"


def dep(pinned: str | None = "844a07002c") -> Dep:
    return Dep(
        ecosystem="gitcommit",
        name="com.github.arkon.FlexibleAdapter:flexible-adapter",
        constraint=pinned or "",
        path=Path("libs.versions.toml"),
        line=1,
        pinned=pinned,
    )


def test_a_pin_at_any_branch_head_passes_whatever_its_length_or_case():
    assert judge(dep("844a07002c"), Answer(HEAD)) is None
    assert judge(dep("844A070"), Answer(HEAD)) is None
    assert judge(dep(HEAD), Answer(HEAD)) is None
    # fix-build2's head, not master's: still current.
    assert judge(dep("c8013533"), Answer(f"{HEAD} {SIDE}")) is None


def test_a_pin_on_no_branch_head_is_stale_and_proposes_the_default_head():
    finding = judge(dep("0123abc"), Answer(f"{HEAD} {SIDE}"))
    assert finding.severity is Severity.STALE
    assert finding.latest == "844a07002c"
    assert "no branch" in finding.detail


def test_a_missing_pin_is_reported_unpinned_with_head_to_use():
    finding = judge(dep(None), Answer(HEAD))
    assert finding.severity is Severity.UNPINNED
    assert "844a07002c" in finding.detail


def test_no_head_at_all_is_unknown_not_a_pass():
    assert judge(dep(), Answer(None)).severity is Severity.UNKNOWN


def test_commit_answers_cache_as_long_as_tags():
    assert ttl_for("gitcommit") == ttl_for("gittag") > ttl_for("maven")


def test_the_resolver_routes_gitcommit_to_the_git_registry():
    assert _LOOKUP["gitcommit"] is gitcommit.latest