"""Unit tests for devx.tools.pr_label."""

from __future__ import annotations

from unittest.mock import MagicMock, patch

import pytest
from click.testing import CliRunner

from devx.tools.pr_label import cli


class TestCli:
    @patch("devx.tools.pr_status.subprocess.run")
    def test_no_token_raises(self, mock_subproc: MagicMock, monkeypatch: pytest.MonkeyPatch) -> None:
        for name in ("DEVELOPER_GITEA_API_TOKEN", "CI_GITEA_API_TOKEN", "CI_GITEA_TOKEN"):
            monkeypatch.delenv(name, raising=False)
        runner = CliRunner()
        result = runner.invoke(
            cli,
            ["--pr", "42", "--label", "ready-to-merge"],
            env={"DEVELOPER_GITEA_API_TOKEN": "", "CI_GITEA_API_TOKEN": "", "CI_GITEA_TOKEN": ""},
        )
        assert result.exit_code != 0
        assert "CI_GITEA_TOKEN" in result.output

    @patch("devx.tools.pr_status.subprocess.run")
    @patch("devx.tools.pr_label.REPO_OWNER", "")
    def test_no_owner_raises(self, mock_subproc: MagicMock, monkeypatch: pytest.MonkeyPatch) -> None:
        monkeypatch.setenv("CI_GITEA_TOKEN", "tok")
        runner = CliRunner()
        result = runner.invoke(cli, ["--pr", "42", "--label", "ready-to-merge"])
        assert result.exit_code != 0
        assert "owner" in result.output.lower()

    @patch("devx.tools.pr_status.subprocess.run")
    @patch("devx.tools.pr_label.GiteaClient")
    def test_adds_new_label(
        self, mock_client_cls: MagicMock, mock_subproc: MagicMock, monkeypatch: pytest.MonkeyPatch
    ) -> None:
        monkeypatch.setenv("CI_GITEA_TOKEN", "tok")
        monkeypatch.setenv("DEVX_REPO_OWNER", "owner")
        monkeypatch.setenv("DEVX_REPO_NAME", "repo")
        client = mock_client_cls.return_value
        client.get_pr_label_names.return_value = []
        runner = CliRunner()
        result = runner.invoke(cli, ["--pr", "42", "--label", "ready-to-merge"])
        assert result.exit_code == 0
        client.add_pr_label.assert_called_once_with(42, ["ready-to-merge"])
        assert "Added label" in result.output

    @patch("devx.tools.pr_status.subprocess.run")
    @patch("devx.tools.pr_label.GiteaClient")
    def test_skips_existing_label(
        self, mock_client_cls: MagicMock, mock_subproc: MagicMock, monkeypatch: pytest.MonkeyPatch
    ) -> None:
        monkeypatch.setenv("CI_GITEA_TOKEN", "tok")
        monkeypatch.setenv("DEVX_REPO_OWNER", "owner")
        monkeypatch.setenv("DEVX_REPO_NAME", "repo")
        client = mock_client_cls.return_value
        client.get_pr_label_names.return_value = ["ready-to-merge"]
        runner = CliRunner()
        result = runner.invoke(cli, ["--pr", "42", "--label", "ready-to-merge"])
        assert result.exit_code == 0
        client.add_pr_label.assert_not_called()
        assert "already" in result.output

    @patch("devx.tools.pr_status.subprocess.run")
    @patch("devx.tools.pr_label.GiteaClient")
    def test_mixed_new_and_existing(
        self, mock_client_cls: MagicMock, mock_subproc: MagicMock, monkeypatch: pytest.MonkeyPatch
    ) -> None:
        monkeypatch.setenv("CI_GITEA_TOKEN", "tok")
        monkeypatch.setenv("DEVX_REPO_OWNER", "owner")
        monkeypatch.setenv("DEVX_REPO_NAME", "repo")
        client = mock_client_cls.return_value
        client.get_pr_label_names.return_value = ["reviewed"]
        runner = CliRunner()
        result = runner.invoke(cli, ["--pr", "42", "--label", "ready-to-merge", "--label", "reviewed"])
        assert result.exit_code == 0
        client.add_pr_label.assert_called_once_with(42, ["ready-to-merge"])
        assert "Added label" in result.output
        assert "already" in result.output

    @patch("devx.tools.pr_label.GiteaClient")
    @patch("devx.tools.pr_status.subprocess.run")
    def test_auto_detect_pr(
        self, mock_subprocess: MagicMock, mock_client_cls: MagicMock, monkeypatch: pytest.MonkeyPatch
    ) -> None:
        monkeypatch.setenv("CI_GITEA_TOKEN", "tok")
        monkeypatch.setenv("DEVX_REPO_OWNER", "owner")
        monkeypatch.setenv("DEVX_REPO_NAME", "repo")
        mock_subprocess.return_value = MagicMock(returncode=0, stdout="feature-branch\n")
        client = mock_client_cls.return_value
        client.list_prs.return_value = [{"number": 42, "head": {"ref": "feature-branch"}}]
        client.get_pr_label_names.return_value = []
        runner = CliRunner()
        result = runner.invoke(cli, ["--label", "ready-to-merge"])
        assert result.exit_code == 0
        client.add_pr_label.assert_called_once_with(42, ["ready-to-merge"])