"""Unit tests for scripts/post_merge.py."""

from unittest.mock import MagicMock, patch

import pytest
import requests

from scripts.post_merge import (
    PROJECT_ID,
    VIKUNJA_API,
    build_comment,
    extract_conventional_msg,
    extract_task_id,
    main,
    mark_task_done,
    post_comment,
    resolve_task_id,
)


class TestExtractTaskId:
    def test_extracts_from_first_line(self) -> None:
        assert extract_task_id("GRM-19: fix: resolve bug\n\nBody") == "GRM-19"

    def test_returns_empty_when_missing(self) -> None:
        assert extract_task_id("fix: resolve bug") == ""


class TestExtractConventionalMsg:
    def test_strips_task_id_prefix(self) -> None:
        assert extract_conventional_msg("GRM-19: fix: resolve bug") == "fix: resolve bug"

    def test_returns_unchanged_without_prefix(self) -> None:
        assert extract_conventional_msg("fix: resolve bug") == "fix: resolve bug"


class TestBuildComment:
    def test_html_format(self) -> None:
        html = build_comment("GRM-19", "fix: bug", "abc123")
        assert "<strong>GRM-19</strong>" in html
        assert "fix: bug" in html
        assert "<code>abc123</code>" in html


class TestResolveTaskId:
    @patch("scripts.post_merge.requests.get")
    def test_found(self, mock_get: MagicMock) -> None:
        mock_response = MagicMock()
        mock_response.json.return_value = [
            {"id": 42, "project_id": PROJECT_ID, "identifier": "GRM-19"},
        ]
        mock_get.return_value = mock_response
        assert resolve_task_id("tok", "GRM-19") == 42
        mock_get.assert_called_once()

    @patch("scripts.post_merge.requests.get")
    def test_not_found_exits(self, mock_get: MagicMock) -> None:
        mock_response = MagicMock()
        mock_response.json.return_value = []
        mock_get.return_value = mock_response
        with pytest.raises(SystemExit) as exc:
            resolve_task_id("tok", "GRM-99")
        assert exc.value.code == 1

    @patch("scripts.post_merge.requests.get")
    def test_wrong_project_filtered(self, mock_get: MagicMock) -> None:
        mock_response = MagicMock()
        mock_response.json.return_value = [
            {"id": 42, "project_id": 999, "identifier": "GRM-19"},
        ]
        mock_get.return_value = mock_response
        with pytest.raises(SystemExit) as exc:
            resolve_task_id("tok", "GRM-19")
        assert exc.value.code == 1

    @patch("scripts.post_merge.requests.get")
    def test_http_error_propagates(self, mock_get: MagicMock) -> None:
        mock_response = MagicMock()
        mock_response.raise_for_status.side_effect = requests.HTTPError("500")
        mock_get.return_value = mock_response
        with pytest.raises(requests.HTTPError):
            resolve_task_id("tok", "GRM-19")


class TestPostComment:
    @patch("scripts.post_merge.requests.post")
    def test_success(self, mock_post: MagicMock) -> None:
        mock_response = MagicMock()
        mock_post.return_value = mock_response
        post_comment("tok", 42, "<p>hi</p>")
        args, kwargs = mock_post.call_args
        assert VIKUNJA_API in args[0]
        assert kwargs["json"]["comment"] == "<p>hi</p>"

    @patch("scripts.post_merge.requests.post")
    def test_http_error_propagates(self, mock_post: MagicMock) -> None:
        mock_response = MagicMock()
        mock_response.raise_for_status.side_effect = requests.HTTPError("500")
        mock_post.return_value = mock_response
        with pytest.raises(requests.HTTPError):
            post_comment("tok", 42, "html")


class TestMarkTaskDone:
    @patch("scripts.post_merge.requests.put")
    def test_success(self, mock_put: MagicMock) -> None:
        mock_response = MagicMock()
        mock_put.return_value = mock_response
        mark_task_done("tok", 42)
        args, kwargs = mock_put.call_args
        assert kwargs["json"]["done"] is True

    @patch("scripts.post_merge.requests.put")
    def test_http_error_propagates(self, mock_put: MagicMock) -> None:
        mock_response = MagicMock()
        mock_response.raise_for_status.side_effect = requests.HTTPError("500")
        mock_put.return_value = mock_response
        with pytest.raises(requests.HTTPError):
            mark_task_done("tok", 42)


class TestMain:
    @patch.dict("os.environ", {"VIKUNJA_TOKEN": "tok"})
    @patch("scripts.post_merge.resolve_task_id")
    @patch("scripts.post_merge.post_comment")
    @patch("scripts.post_merge.mark_task_done")
    def test_full_flow(
        self, mock_mark: MagicMock, mock_post: MagicMock, mock_resolve: MagicMock, capsys: pytest.CaptureFixture[str]
    ) -> None:
        mock_resolve.return_value = 267
        main(["post_merge.py", "GRM-20: fix: resolve bug\n\nBody", "--commit-sha", "abc123"])
        mock_resolve.assert_called_once_with("tok", "GRM-20")
        mock_post.assert_called_once()
        mock_mark.assert_called_once_with("tok", 267)
        captured = capsys.readouterr()
        assert "updated and marked done" in captured.out

    @patch.dict("os.environ", {"VIKUNJA_TOKEN": "tok"})
    @patch("scripts.post_merge.resolve_task_id")
    @patch("scripts.post_merge.post_comment")
    @patch("scripts.post_merge.mark_task_done")
    def test_no_commit_sha(self, mock_mark: MagicMock, mock_post: MagicMock, mock_resolve: MagicMock) -> None:
        mock_resolve.return_value = 267
        main(["post_merge.py", "GRM-20: fix: resolve bug"])
        mock_post.assert_called_once()
        args, _ = mock_post.call_args
        assert "unknown" in args[2]

    @patch.dict("os.environ", {"VIKUNJA_TOKEN": ""}, clear=True)
    def test_missing_token_exits(self) -> None:
        with pytest.raises(SystemExit) as exc:
            main(["post_merge.py", "GRM-20: fix: bug"])
        assert exc.value.code == 1

    @patch.dict("os.environ", {"VIKUNJA_TOKEN": "tok"})
    def test_no_task_id_skips(self, capsys: pytest.CaptureFixture[str]) -> None:
        main(["post_merge.py", "fix: resolve bug"])
        captured = capsys.readouterr()
        assert "skipping Vikunja update" in captured.out

    @patch.dict("os.environ", {"VIKUNJA_TOKEN": "tok"})
    @patch("scripts.post_merge.resolve_task_id")
    def test_resolve_failure_propagates(self, mock_resolve: MagicMock) -> None:
        mock_resolve.side_effect = SystemExit(1)
        with pytest.raises(SystemExit) as exc:
            main(["post_merge.py", "GRM-20: fix: bug"])
        assert exc.value.code == 1

    @patch.dict("os.environ", {"VIKUNJA_TOKEN": "tok"})
    @patch("scripts.post_merge.resolve_task_id")
    @patch("scripts.post_merge.post_comment")
    def test_post_comment_failure_propagates(self, mock_post: MagicMock, mock_resolve: MagicMock) -> None:
        mock_resolve.return_value = 267
        mock_post.side_effect = requests.HTTPError("500")
        with pytest.raises(requests.HTTPError):
            main(["post_merge.py", "GRM-20: fix: bug"])

    @patch.dict("os.environ", {"VIKUNJA_TOKEN": "tok"})
    @patch("scripts.post_merge.resolve_task_id")
    @patch("scripts.post_merge.post_comment")
    @patch("scripts.post_merge.mark_task_done")
    def test_mark_done_failure_propagates(
        self, mock_mark: MagicMock, mock_post: MagicMock, mock_resolve: MagicMock
    ) -> None:
        mock_resolve.return_value = 267
        mock_mark.side_effect = requests.HTTPError("500")
        with pytest.raises(requests.HTTPError):
            main(["post_merge.py", "GRM-20: fix: bug"])