"""Tests for the Click CLI."""

from pathlib import Path

from click.testing import CliRunner

from spice2wireviz.cli import main

FIXTURES = Path(__file__).parent / "fixtures"


class TestCLIBasic:
    def test_version(self):
        runner = CliRunner()
        result = runner.invoke(main, ["--version"])
        assert result.exit_code == 0
        assert "2026.2.13" in result.output

    def test_list_subcircuits(self):
        runner = CliRunner()
        result = runner.invoke(main, [str(FIXTURES / "multi_board.net"), "--list-subcircuits"])
        assert result.exit_code == 0
        assert "power_supply" in result.output
        assert "amplifier" in result.output
        assert "io_board" in result.output

    def test_list_components(self):
        runner = CliRunner()
        result = runner.invoke(main, [str(FIXTURES / "multi_board.net"), "--list-components"])
        assert result.exit_code == 0
        assert "J_CHASSIS" in result.output
        assert "TP_VCC" in result.output

    def test_nonexistent_file(self):
        runner = CliRunner()
        result = runner.invoke(main, ["/nonexistent/file.net"])
        assert result.exit_code != 0


class TestCLISingleModule:
    def test_single_mode_explicit(self):
        runner = CliRunner()
        result = runner.invoke(
            main,
            [str(FIXTURES / "simple_board.net"), "-m", "single", "-s", "amplifier_board"],
        )
        assert result.exit_code == 0
        assert "connectors:" in result.output
        assert "amplifier_board" in result.output

    def test_single_mode_auto_detect(self):
        runner = CliRunner()
        result = runner.invoke(
            main, [str(FIXTURES / "simple_board.net"), "-s", "amplifier_board"]
        )
        assert result.exit_code == 0
        assert "connectors:" in result.output

    def test_single_mode_only_subcircuit(self):
        """When netlist has one subcircuit and no instances, auto-detect single mode."""
        runner = CliRunner()
        result = runner.invoke(main, [str(FIXTURES / "simple_board.net")])
        assert result.exit_code == 0
        assert "connectors:" in result.output

    def test_dry_run(self):
        runner = CliRunner()
        result = runner.invoke(
            main,
            [str(FIXTURES / "simple_board.net"), "-s", "amplifier_board", "--dry-run"],
        )
        assert result.exit_code == 0
        assert "Mode: single" in result.output
        assert "Connectors:" in result.output


class TestCLIInterModule:
    def test_inter_mode_explicit(self):
        runner = CliRunner()
        result = runner.invoke(
            main, [str(FIXTURES / "multi_board.net"), "-m", "inter"]
        )
        assert result.exit_code == 0
        assert "connectors:" in result.output
        assert "cables:" in result.output

    def test_inter_mode_auto_detect(self):
        runner = CliRunner()
        result = runner.invoke(main, [str(FIXTURES / "multi_board.net")])
        assert result.exit_code == 0
        assert "connectors:" in result.output

    def test_output_to_file(self, tmp_path):
        out = tmp_path / "output.yml"
        runner = CliRunner()
        result = runner.invoke(
            main, [str(FIXTURES / "multi_board.net"), "-o", str(out)]
        )
        assert result.exit_code == 0
        assert out.exists()
        content = out.read_text()
        assert "connectors:" in content


class TestCLIFiltering:
    def test_no_ground(self):
        runner = CliRunner()
        result = runner.invoke(
            main, [str(FIXTURES / "multi_board.net"), "--no-ground"]
        )
        assert result.exit_code == 0
        # GND should not appear in pinlabels
        assert "- GND" not in result.output

    def test_include_prefixes(self):
        runner = CliRunner()
        result = runner.invoke(
            main,
            [str(FIXTURES / "multi_board.net"), "--include-prefixes", "J"],
        )
        assert result.exit_code == 0

    def test_exclude_refs(self):
        runner = CliRunner()
        result = runner.invoke(
            main,
            [str(FIXTURES / "multi_board.net"), "--exclude-refs", "X1,TP_VCC"],
        )
        assert result.exit_code == 0
        assert "X1:" not in result.output