"""Tests for providers.py - AI provider abstraction."""

import tempfile
from pathlib import Path
from unittest.mock import patch, MagicMock

import pytest
import yaml

from cmdforge.providers import (
    Provider, ProviderResult, ProviderExecutionPolicy,
    load_providers, save_providers, get_provider,
    add_provider, delete_provider,
    call_provider, discover_installed_providers, mock_provider,
    DEFAULT_PROVIDERS, strip_ansi
)


class TestProvider:
    """Tests for Provider dataclass."""

    def test_create_basic(self):
        provider = Provider(name="test", command="echo test")
        assert provider.name == "test"
        assert provider.command == "echo test"
        assert provider.description == ""

    def test_create_with_description(self):
        provider = Provider(
            name="claude",
            command="claude -p",
            description="Anthropic Claude"
        )
        assert provider.description == "Anthropic Claude"

    def test_to_dict(self):
        provider = Provider(
            name="gpt4",
            command="openai chat",
            description="OpenAI GPT-4"
        )
        d = provider.to_dict()
        assert d["name"] == "gpt4"
        assert d["command"] == "openai chat"
        assert d["description"] == "OpenAI GPT-4"

    def test_from_dict(self):
        data = {
            "name": "local",
            "command": "ollama run llama2",
            "description": "Local Ollama"
        }
        provider = Provider.from_dict(data)
        assert provider.name == "local"
        assert provider.command == "ollama run llama2"
        assert provider.description == "Local Ollama"

    def test_from_dict_missing_description(self):
        data = {"name": "test", "command": "test cmd"}
        provider = Provider.from_dict(data)
        assert provider.description == ""

    def test_legacy_policy_field_aliases_are_canonicalized(self):
        provider = Provider.from_dict({
            "name": "legacy-policy",
            "command": "provider",
            "model_id": "model-a",
            "max_input_tokens": 8192,
        })

        assert provider.model == "model-a"
        assert provider.max_context_tokens == 8192
        assert provider.to_dict()["model"] == "model-a"
        assert provider.to_dict()["max_context_tokens"] == 8192

    def test_roundtrip(self):
        original = Provider(
            name="custom",
            command="my-ai --prompt",
            description="My custom provider"
        )
        restored = Provider.from_dict(original.to_dict())
        assert restored.name == original.name
        assert restored.command == original.command
        assert restored.description == original.description

    def test_legacy_positional_fallback_is_preserved(self):
        provider = Provider("primary", "primary-cmd", "Primary", "backup")

        assert provider.fallback == "backup"
        assert provider.type == "subprocess"

    def test_extended_fields_roundtrip(self):
        original = Provider(
            name="api-test",
            command="https://example.test/v1",
            description="Test API",
            fallback="mock",
            type="api",
            model="test/model",
            tags=["api", "test"],
            install={"cost": "test"},
            fallback_chain=["backup", "mock"],
            api_key_env="TEST_API_KEY",
            pty_config={"prompt_pattern": ">"},
            locality="remote",
            capabilities=["text", "structured-json"],
            model_digest="sha256:abc",
            cost_class="low",
            latency_class="fast",
            max_context_tokens=131072,
            data_policy="internal",
        )

        assert Provider.from_dict(original.to_dict()) == original


class TestProviderResult:
    """Tests for ProviderResult dataclass."""

    def test_success_result(self):
        result = ProviderResult(text="Hello!", success=True)
        assert result.text == "Hello!"
        assert result.success is True
        assert result.error is None

    def test_error_result(self):
        result = ProviderResult(text="", success=False, error="API timeout")
        assert result.text == ""
        assert result.success is False
        assert result.error == "API timeout"


class TestMockProvider:
    """Tests for the mock provider."""

    def test_mock_returns_success(self):
        result = mock_provider("Test prompt")
        assert result.success is True
        # Mock returns structured JSON with output and reasoning
        import json
        parsed = json.loads(result.text)
        assert "[MOCK]" in parsed["output"]

    def test_mock_includes_prompt_info(self):
        result = mock_provider("This is a test prompt")
        import json
        parsed = json.loads(result.text)
        # Prompt info is in reasoning field
        assert "chars" in parsed["reasoning"]
        assert "lines" in parsed["reasoning"]

    def test_mock_shows_first_line_preview(self):
        result = mock_provider("First line here\nSecond line")
        assert "First line" in result.text

    def test_mock_truncates_long_first_line(self):
        long_line = "x" * 100
        result = mock_provider(long_line)
        assert "..." in result.text

    def test_mock_counts_lines(self):
        prompt = "line1\nline2\nline3"
        result = mock_provider(prompt)
        assert "3 lines" in result.text


class TestProviderPersistence:
    """Tests for provider save/load operations."""

    @pytest.fixture
    def temp_providers_file(self, tmp_path):
        """Create a temporary providers file."""
        providers_file = tmp_path / ".cmdforge" / "providers.yaml"
        with patch('cmdforge.providers.PROVIDERS_FILE', providers_file):
            yield providers_file

    def test_save_and_load_providers(self, temp_providers_file):
        providers = [
            Provider("test1", "cmd1", "Description 1"),
            Provider("test2", "cmd2", "Description 2")
        ]
        save_providers(providers)

        loaded = load_providers()
        assert len(loaded) == 2
        assert loaded[0].name == "test1"
        assert loaded[1].name == "test2"

    def test_save_providers_uses_private_file_permissions(self, temp_providers_file):
        save_providers([Provider("test", "cmd")])

        assert oct(temp_providers_file.stat().st_mode & 0o777) == "0o600"

    def test_malformed_access_policy_fails_closed(self, temp_providers_file, capsys):
        temp_providers_file.parent.mkdir(parents=True)
        temp_providers_file.write_text(yaml.safe_dump({
            "version": 2,
            "providers": [{
                "name": "claude",
                "command": "claude -p",
                "tools": "should-have-been-a-list",
            }],
        }))

        assert load_providers() == []
        assert "Failed to load provider configuration" in capsys.readouterr().err

    def test_legacy_config_gains_missing_defaults_without_losing_custom_provider(self, temp_providers_file):
        temp_providers_file.parent.mkdir(parents=True)
        temp_providers_file.write_text(yaml.safe_dump({
            "providers": [
                {
                    "name": "custom",
                    "command": "custom-command",
                    "description": "Keep me",
                    "fallback": "mock",
                }
            ]
        }))

        loaded = load_providers()

        custom = next(provider for provider in loaded if provider.name == "custom")
        assert custom.command == "custom-command"
        assert custom.fallback == "mock"
        assert any(provider.name == "opencode-free" for provider in loaded)
        assert any(provider.name == "openrouter" for provider in loaded)
        saved = yaml.safe_load(temp_providers_file.read_text())
        assert saved["version"] == 2

    def test_get_provider_exists(self, temp_providers_file):
        providers = [
            Provider("target", "target-cmd", "Target provider")
        ]
        save_providers(providers)

        result = get_provider("target")
        assert result is not None
        assert result.name == "target"
        assert result.command == "target-cmd"

    def test_get_provider_not_exists(self, temp_providers_file):
        save_providers([])

        result = get_provider("nonexistent")
        assert result is None

    def test_add_new_provider(self, temp_providers_file):
        save_providers([])

        new_provider = Provider("new", "new-cmd", "New provider")
        add_provider(new_provider)

        loaded = load_providers()
        assert any(p.name == "new" for p in loaded)

    def test_add_provider_updates_existing(self, temp_providers_file):
        save_providers([
            Provider("existing", "old-cmd", "Old description")
        ])

        updated = Provider("existing", "new-cmd", "New description")
        add_provider(updated)

        loaded = load_providers()
        existing = next(p for p in loaded if p.name == "existing")
        assert existing.command == "new-cmd"
        assert existing.description == "New description"

    def test_delete_provider(self, temp_providers_file):
        save_providers([
            Provider("keep", "keep-cmd"),
            Provider("delete", "delete-cmd")
        ])

        result = delete_provider("delete")
        assert result is True

        loaded = load_providers()
        assert not any(p.name == "delete" for p in loaded)
        assert any(p.name == "keep" for p in loaded)

    def test_delete_nonexistent_provider(self, temp_providers_file):
        save_providers([])

        result = delete_provider("nonexistent")
        assert result is False


class TestDefaultProviders:
    """Tests for default providers."""

    def test_default_providers_exist(self):
        assert len(DEFAULT_PROVIDERS) > 0

    def test_mock_in_defaults(self):
        assert any(p.name == "mock" for p in DEFAULT_PROVIDERS)

    def test_claude_in_defaults(self):
        assert any(p.name == "claude" for p in DEFAULT_PROVIDERS)

    def test_all_defaults_have_commands(self):
        for provider in DEFAULT_PROVIDERS:
            assert provider.command, f"Provider {provider.name} has no command"


class TestCallProvider:
    """Tests for call_provider function."""

    @pytest.fixture
    def temp_providers_file(self, tmp_path):
        """Create a temporary providers file."""
        providers_file = tmp_path / ".cmdforge" / "providers.yaml"
        with patch('cmdforge.providers.PROVIDERS_FILE', providers_file):
            yield providers_file

    def test_call_mock_provider(self, temp_providers_file):
        """Mock provider should work without subprocess."""
        result = call_provider("mock", "Test prompt")
        assert result.success is True
        # Mock returns structured JSON
        import json
        parsed = json.loads(result.text)
        assert "[MOCK]" in parsed["output"]

    def test_call_nonexistent_provider(self, temp_providers_file):
        save_providers([])

        result = call_provider("nonexistent", "Test")
        assert result.success is False
        assert "not found" in result.error.lower()

    @patch('subprocess.run')
    def test_call_provider_rejects_non_integer_max_tokens(self, mock_run, temp_providers_file):
        save_providers([Provider("claude", "claude -p")])

        result = call_provider("claude", "Test", max_tokens="1; touch /tmp/pwned")

        assert result.success is False
        assert "max_tokens" in result.error
        mock_run.assert_not_called()

    @patch('subprocess.run')
    @patch('shutil.which')
    def test_call_real_provider_success(self, mock_which, mock_run, temp_providers_file):
        # Setup
        mock_which.return_value = "/usr/bin/echo"
        mock_run.return_value = MagicMock(
            returncode=0,
            stdout="AI response here",
            stderr=""
        )
        save_providers([Provider("echo-test", "echo test")])

        result = call_provider("echo-test", "Prompt")

        assert result.success is True
        assert result.text == "AI response here"

    @patch('subprocess.run')
    @patch('shutil.which')
    def test_call_provider_nonzero_exit(self, mock_which, mock_run, temp_providers_file):
        mock_which.return_value = "/usr/bin/cmd"
        mock_run.return_value = MagicMock(
            returncode=1,
            stdout="",
            stderr="Error occurred"
        )
        save_providers([Provider("failing", "failing-cmd")])

        result = call_provider("failing", "Prompt")

        assert result.success is False
        assert "exited with code 1" in result.error

    @patch('subprocess.run')
    @patch('shutil.which')
    def test_call_provider_empty_output(self, mock_which, mock_run, temp_providers_file):
        mock_which.return_value = "/usr/bin/cmd"
        mock_run.return_value = MagicMock(
            returncode=0,
            stdout="   ",  # Only whitespace
            stderr=""
        )
        save_providers([Provider("empty", "empty-cmd")])

        result = call_provider("empty", "Prompt")

        assert result.success is False
        assert "empty output" in result.error.lower()

    @patch('subprocess.run')
    @patch('shutil.which')
    def test_call_provider_timeout(self, mock_which, mock_run, temp_providers_file):
        import subprocess

        mock_which.return_value = "/usr/bin/slow"
        mock_run.side_effect = subprocess.TimeoutExpired(cmd="slow", timeout=10)
        save_providers([Provider("slow", "slow-cmd")])

        result = call_provider("slow", "Prompt", timeout=10)

        assert result.success is False
        assert "timed out" in result.error.lower()

    @patch('shutil.which')
    def test_call_provider_command_not_found(self, mock_which, temp_providers_file):
        mock_which.return_value = None
        save_providers([Provider("missing", "nonexistent-binary")])

        result = call_provider("missing", "Prompt")

        assert result.success is False
        assert "not found" in result.error.lower()

    @patch('subprocess.run')
    @patch('shutil.which')
    def test_provider_receives_prompt_as_stdin(self, mock_which, mock_run, temp_providers_file):
        mock_which.return_value = "/usr/bin/cat"
        mock_run.return_value = MagicMock(returncode=0, stdout="output", stderr="")
        save_providers([Provider("cat", "cat")])

        call_provider("cat", "My prompt text")

        # Verify prompt was passed as input
        call_kwargs = mock_run.call_args[1]
        assert call_kwargs["input"] == "My prompt text"

    def test_environment_variable_expansion(self, temp_providers_file):
        """Provider commands should expand $HOME etc."""
        save_providers([
            Provider("home-test", "$HOME/bin/my-ai")
        ])

        # This will fail because the command doesn't exist,
        # but we can check the error message to verify expansion happened
        result = call_provider("home-test", "Test")

        # The error should mention the expanded path, not $HOME
        assert "$HOME" not in result.error


class TestProviderCommandParsing:
    """Tests for command parsing with shlex."""

    @pytest.fixture
    def temp_providers_file(self, tmp_path):
        providers_file = tmp_path / ".cmdforge" / "providers.yaml"
        with patch('cmdforge.providers.PROVIDERS_FILE', providers_file):
            yield providers_file

    @patch('shutil.which')
    def test_command_with_quotes(self, mock_which, temp_providers_file):
        """Commands with quotes should be parsed correctly."""
        mock_which.return_value = None  # Will fail, but we test parsing

        save_providers([
            Provider("quoted", 'my-cmd --arg "value with spaces"')
        ])

        result = call_provider("quoted", "Test")

        # Should fail at command-not-found, not at parsing
        assert "not found" in result.error.lower()
        assert "my-cmd" in result.error

    @patch('shutil.which')
    def test_command_with_env_vars(self, mock_which, temp_providers_file):
        """Environment variables in commands should be expanded."""
        import os
        mock_which.return_value = None

        save_providers([
            Provider("env-test", "$HOME/.local/bin/my-ai")
        ])

        result = call_provider("env-test", "Test")

        # Error should show expanded path
        home = os.environ.get("HOME", "")
        assert "$HOME" not in result.error or home in result.error


class TestProviderFallback:
    """Tests for provider fallback functionality."""

    @pytest.fixture
    def temp_providers_file(self, tmp_path):
        providers_file = tmp_path / ".cmdforge" / "providers.yaml"
        with patch('cmdforge.providers.PROVIDERS_FILE', providers_file):
            yield providers_file

    def test_provider_with_fallback_to_dict(self):
        """Provider with fallback should include it in dict."""
        provider = Provider(
            name="cloud",
            command="cloud-ai",
            description="Cloud AI",
            fallback="local"
        )
        d = provider.to_dict()
        assert d["fallback"] == "local"

    def test_provider_without_fallback_to_dict(self):
        """Provider without fallback should not include fallback key."""
        provider = Provider(name="simple", command="simple-ai")
        d = provider.to_dict()
        assert "fallback" not in d

    def test_provider_from_dict_with_fallback(self):
        """Provider.from_dict should handle fallback field."""
        data = {
            "name": "cloud",
            "command": "cloud-ai",
            "fallback": "local"
        }
        provider = Provider.from_dict(data)
        assert provider.fallback == "local"

    def test_provider_from_dict_without_fallback(self):
        """Provider.from_dict should handle missing fallback."""
        data = {"name": "simple", "command": "simple-ai"}
        provider = Provider.from_dict(data)
        assert provider.fallback is None

    def test_fallback_triggers_on_failure(self, temp_providers_file):
        """When primary provider fails, fallback should be tried."""
        save_providers([
            Provider("primary", "nonexistent-cmd", fallback="mock"),
            Provider("mock", "mock")
        ])

        result = call_provider("primary", "Test prompt")

        # Fallback to mock should succeed
        assert result.success is True
        assert "[MOCK]" in result.text
        assert result.requested_provider == "primary"
        assert result.actual_provider == "mock"
        assert result.attempted_providers == ["primary", "mock"]
        assert result.fallback_used is True

    def test_no_fallback_fails_closed(self, temp_providers_file):
        save_providers([
            Provider("primary", "nonexistent-cmd", fallback="mock"),
            Provider("mock", "mock"),
        ])

        result = call_provider(
            "primary", "Test prompt",
            execution_policy=ProviderExecutionPolicy(allow_fallback=False),
        )

        assert result.success is False
        assert result.requested_provider == "primary"
        assert result.actual_provider is None
        assert result.attempted_providers == ["primary"]
        assert result.fallback_used is False

    def test_private_data_requires_explicit_compatible_policy(
        self, temp_providers_file
    ):
        save_providers([
            Provider(
                "local", "unused", locality="local",
                capabilities=["structured-json"],
            ),
        ])

        result = call_provider(
            "local", "private packet",
            execution_policy=ProviderExecutionPolicy(
                allow_fallback=False,
                required_locality="local",
                required_capabilities=("structured-json",),
                data_classification="private",
            ),
        )

        assert result.success is False
        assert "data_policy is unspecified" in result.error

    def test_require_local_rejects_ollama_redirected_to_remote_host(
        self, temp_providers_file, monkeypatch
    ):
        save_providers([
            Provider(
                "ollama-private", "ollama run safe", locality="local",
                data_policy="private",
            ),
        ])
        monkeypatch.setenv("OLLAMA_HOST", "gpu.example.test:11434")

        result = call_provider(
            "ollama-private", "private packet",
            execution_policy=ProviderExecutionPolicy(
                allow_fallback=False,
                required_locality="local",
                data_classification="private",
            ),
        )

        assert result.success is False
        assert "locality is remote" in result.error

    def test_ollama_digest_is_observed_from_local_api(
        self, temp_providers_file, monkeypatch
    ):
        save_providers([
            Provider(
                "ollama-safe", "ollama run safe:latest", model="safe:latest",
                locality="local", data_policy="private",
            ),
        ])
        monkeypatch.delenv("OLLAMA_HOST", raising=False)

        class Response:
            def __enter__(self):
                return self

            def __exit__(self, *args):
                return False

            def read(self):
                return (
                    b'{"models":[{"name":"safe:latest","model":"safe:latest",'
                    b'"digest":"abcdef"}]}'
                )

        with (
            patch("urllib.request.urlopen", return_value=Response()),
            patch(
                "cmdforge.providers.call_provider_subprocess",
                return_value=ProviderResult(text="safe", success=True),
            ),
        ):
            result = call_provider(
                "ollama-safe", "private",
                execution_policy=ProviderExecutionPolicy(
                    allow_fallback=False,
                    required_locality="local",
                    data_classification="private",
                    require_model_identity=True,
                    require_model_digest=True,
                ),
            )

        assert result.model == "safe:latest"
        assert result.model_digest == "sha256:abcdef"
        assert result.model_identity_source == "ollama-api"

    def test_policy_eligible_provider_reports_verified_metadata(
        self, temp_providers_file
    ):
        provider = Provider(
            "local", "local-ai", model="model-a",
            model_digest="sha256:123", locality="local",
            capabilities=["structured-json"], data_policy="private",
        )
        save_providers([provider])
        low_level = ProviderResult(text='{"ok": true}', success=True)

        with patch(
            "cmdforge.providers.call_provider_subprocess",
            return_value=low_level,
        ):
            result = call_provider(
                "local", "private packet",
                execution_policy=ProviderExecutionPolicy(
                    allow_fallback=False,
                    required_locality="local",
                    required_capabilities=("structured-json",),
                    data_classification="private",
                    require_model_identity=True,
                    require_model_digest=True,
                ),
            )

        assert result.success is True
        assert result.provenance() == {
            "success": True,
            "requested_provider": "local",
            "actual_provider": "local",
            "attempted_providers": ["local"],
            "fallback_used": False,
            "model": "model-a",
            "model_digest": "sha256:123",
            "locality": "local",
            "model_identity_source": "provider-config",
        }

    def test_fallback_chain_skips_policy_ineligible_provider(
        self, temp_providers_file
    ):
        save_providers([
            Provider(
                "primary", "primary", fallback_chain=["remote", "local"],
                locality="local", data_policy="private",
            ),
            Provider(
                "remote", "remote", locality="remote", data_policy="private",
            ),
            Provider(
                "local", "local", locality="local", data_policy="private",
                model="safe-model",
            ),
        ])

        def invoke(provider, prompt, timeout, max_tokens):
            if provider.name == "primary":
                return ProviderResult(text="", success=False, error="offline")
            assert provider.name == "local"
            return ProviderResult(text="safe", success=True)

        with patch(
            "cmdforge.providers.call_provider_subprocess", side_effect=invoke
        ) as low_level:
            result = call_provider(
                "primary", "private packet",
                execution_policy=ProviderExecutionPolicy(
                    required_locality="local",
                    data_classification="private",
                ),
            )

        assert result.success is True
        assert result.actual_provider == "local"
        assert result.attempted_providers == ["primary", "remote", "local"]
        assert [call.args[0].name for call in low_level.call_args_list] == [
            "primary", "local"
        ]

    def test_fallback_chain(self, temp_providers_file):
        """Fallback can chain to another provider with fallback."""
        save_providers([
            Provider("first", "nonexistent1", fallback="second"),
            Provider("second", "nonexistent2", fallback="mock"),
            Provider("mock", "mock")
        ])

        result = call_provider("first", "Test prompt")

        # Should chain: first -> second -> mock
        assert result.success is True
        assert "[MOCK]" in result.text

    def test_fallback_chain_continues_after_failed_candidate(self, temp_providers_file):
        save_providers([
            Provider("primary", "missing-primary", fallback_chain=["secondary", "mock"]),
            Provider("secondary", "missing-secondary"),
            Provider("mock", "mock"),
        ])

        result = call_provider("primary", "Test prompt")

        assert result.success is True
        assert "[MOCK]" in result.text

    def test_fallback_prevents_infinite_loop(self, temp_providers_file):
        """Circular fallback references should not cause infinite loop."""
        save_providers([
            Provider("a", "nonexistent-a", fallback="b"),
            Provider("b", "nonexistent-b", fallback="a"),
        ])

        result = call_provider("a", "Test prompt")

        # Should fail gracefully, not loop forever
        assert result.success is False
        assert "not found" in result.error.lower()

    @patch('subprocess.run')
    @patch('shutil.which')
    def test_fallback_on_timeout(self, mock_which, mock_run, temp_providers_file):
        """Fallback should trigger on timeout."""
        import subprocess
        mock_which.return_value = "/usr/bin/slow-ai"
        mock_run.side_effect = subprocess.TimeoutExpired("slow-ai", 5)

        save_providers([
            Provider("slow", "slow-ai", fallback="mock"),
            Provider("mock", "mock")
        ])

        result = call_provider("slow", "Test prompt", timeout=5)

        assert result.success is True
        assert "[MOCK]" in result.text

    @patch('subprocess.run')
    @patch('shutil.which')
    def test_fallback_on_nonzero_exit(self, mock_which, mock_run, temp_providers_file):
        """Fallback should trigger on non-zero exit code."""
        mock_which.return_value = "/usr/bin/failing-ai"
        mock_run.return_value = MagicMock(
            returncode=1,
            stdout="",
            stderr="API error"
        )

        save_providers([
            Provider("failing", "failing-ai", fallback="mock"),
            Provider("mock", "mock")
        ])

        result = call_provider("failing", "Test prompt")

        assert result.success is True
        assert "[MOCK]" in result.text


class TestStripAnsi:
    """Tests for ANSI escape code stripping."""

    def test_strip_basic_color_codes(self):
        """Strip basic color codes like \\x1b[0m."""
        text = "\x1b[31mred text\x1b[0m"
        assert strip_ansi(text) == "red text"

    def test_strip_cursor_movements(self):
        """Strip cursor movement codes."""
        text = "\x1b[2Jhello\x1b[H"
        assert strip_ansi(text) == "hello"

    def test_strip_private_mode_sequences(self):
        """Strip private mode sequences like \\x1b[?25l (hide cursor)."""
        text = "\x1b[?2026h\x1b[?25lspinner\x1b[?25h\x1b[?2026l"
        assert strip_ansi(text) == "spinner"

    def test_strip_ollama_spinner(self):
        """Strip Ollama spinner output."""
        text = "\x1b[?2026h\x1b[?25l⠋ \x1b[?25h\x1b[?2026l\x1b[?2026h\x1b[?25l⠙ \x1b[?25h"
        result = strip_ansi(text)
        # Should only have spinner characters left, not escape codes
        assert "\x1b" not in result
        assert "⠋" in result or "⠙" in result

    def test_strip_carriage_return(self):
        """Strip carriage returns."""
        text = "line1\rline2"
        assert strip_ansi(text) == "line1line2"

    def test_preserve_normal_text(self):
        """Normal text should be preserved."""
        text = "Hello, World! 123 [test] {data}"
        assert strip_ansi(text) == text

    def test_strip_osc_sequences(self):
        """Strip OSC (Operating System Command) sequences."""
        text = "\x1b]0;Window Title\x07content"
        assert strip_ansi(text) == "content"


class TestMaxTokens:
    """Tests for max_tokens parameter."""

    @pytest.fixture
    def temp_providers_file(self, tmp_path):
        providers_file = tmp_path / ".cmdforge" / "providers.yaml"
        with patch('cmdforge.providers.PROVIDERS_FILE', providers_file):
            yield providers_file

    @patch('subprocess.run')
    @patch('shutil.which')
    def test_max_tokens_appended_for_claude(self, mock_which, mock_run, temp_providers_file):
        """max_tokens should append --max-tokens for claude providers."""
        mock_which.return_value = "/usr/bin/claude"
        mock_run.return_value = MagicMock(returncode=0, stdout="response", stderr="")
        save_providers([Provider("claude-haiku", "claude -p --model haiku")])

        call_provider("claude-haiku", "Test prompt", max_tokens=4096)

        # Verify the command included --max-tokens
        call_args = mock_run.call_args
        cmd = call_args[0][0]
        assert "--max-tokens 4096" in cmd

    @patch('subprocess.run')
    @patch('shutil.which')
    def test_max_tokens_appended_for_gemini(self, mock_which, mock_run, temp_providers_file):
        """max_tokens should append --max-output-tokens for gemini providers."""
        mock_which.return_value = "/usr/bin/gemini"
        mock_run.return_value = MagicMock(returncode=0, stdout="response", stderr="")
        save_providers([Provider("gemini", "gemini --model gemini-2.5-pro")])

        call_provider("gemini", "Test prompt", max_tokens=8192)

        call_args = mock_run.call_args
        cmd = call_args[0][0]
        assert "--max-output-tokens 8192" in cmd

    @patch('subprocess.run')
    @patch('shutil.which')
    def test_max_tokens_not_appended_when_none(self, mock_which, mock_run, temp_providers_file):
        """No flag should be added when max_tokens is None."""
        mock_which.return_value = "/usr/bin/claude"
        mock_run.return_value = MagicMock(returncode=0, stdout="response", stderr="")
        save_providers([Provider("claude", "claude -p")])

        call_provider("claude", "Test prompt", max_tokens=None)

        call_args = mock_run.call_args
        cmd = call_args[0][0]
        assert "--max-tokens" not in cmd

    @patch('subprocess.run')
    @patch('shutil.which')
    def test_max_tokens_passed_through_fallback(self, mock_which, mock_run, temp_providers_file):
        """max_tokens should be passed to fallback provider."""
        mock_which.return_value = "/usr/bin/claude"
        # First call fails, second succeeds
        mock_run.side_effect = [
            MagicMock(returncode=1, stdout="", stderr="Error"),
            MagicMock(returncode=0, stdout="fallback response", stderr="")
        ]
        save_providers([
            Provider("primary", "claude -p --model opus", fallback="fallback"),
            Provider("fallback", "claude -p --model haiku")
        ])

        result = call_provider("primary", "Test prompt", max_tokens=4096)

        assert result.success is True
        # Both calls should have had max_tokens
        calls = mock_run.call_args_list
        assert "--max-tokens 4096" in calls[0][0][0]
        assert "--max-tokens 4096" in calls[1][0][0]


class TestApiProviders:
    @pytest.fixture
    def temp_providers_file(self, tmp_path):
        providers_file = tmp_path / ".cmdforge" / "providers.yaml"
        with patch('cmdforge.providers.PROVIDERS_FILE', providers_file):
            yield providers_file

    @patch('requests.post')
    def test_openai_compatible_api_dispatch(self, mock_post, temp_providers_file):
        response = MagicMock(status_code=200)
        response.json.return_value = {
            "choices": [{"message": {"content": "API response"}}]
        }
        mock_post.return_value = response
        save_providers([
            Provider(
                "test-api",
                "https://example.test/v1",
                type="api",
                model="example/model",
                api_key_env="TEST_API_KEY",
            )
        ])

        with patch.dict('os.environ', {"TEST_API_KEY": "secret"}):
            result = call_provider("test-api", "Prompt", max_tokens=128)

        assert result.success is True
        assert result.text == "API response"
        mock_post.assert_called_once_with(
            "https://example.test/v1/chat/completions",
            json={
                "model": "example/model",
                "messages": [{"role": "user", "content": "Prompt"}],
                "max_tokens": 128,
            },
            headers={
                "Authorization": "Bearer secret",
                "Content-Type": "application/json",
            },
            timeout=300,
        )

    def test_api_provider_requires_configured_key(self, temp_providers_file):
        save_providers([
            Provider(
                "test-api",
                "https://example.test/v1",
                type="api",
                model="example/model",
                api_key_env="MISSING_TEST_API_KEY",
            )
        ])

        with patch.dict('os.environ', {"MISSING_TEST_API_KEY": ""}):
            result = call_provider("test-api", "Prompt")

        assert result.success is False
        assert "MISSING_TEST_API_KEY" in result.error


class TestProviderDiscovery:
    def test_ollama_model_names_include_tags_and_are_unique(self):
        ollama_list = MagicMock(
            returncode=0,
            stdout=(
                "NAME ID SIZE MODIFIED\n"
                "hermes4.3:latest abc 1 GB now\n"
                "hermes4.3:q4_k_m def 1 GB now\n"
            ),
        )

        def which(binary):
            return "/usr/bin/ollama" if binary == "ollama" else None

        with patch('cmdforge.providers.shutil.which', side_effect=which):
            with patch('cmdforge.providers.subprocess.run', return_value=ollama_list):
                found = discover_installed_providers()

        models = [item for item in found if item["source"] == "ollama-model"]
        assert len(models) == 2
        assert len({item["name"] for item in models}) == 2
        assert models[0]["name"] == "ollama-hermes4-3-latest"
        assert models[1]["name"] == "ollama-hermes4-3-q4-k-m"


class TestProviderAccessControl:
    def test_tools_allowlist_defaults_to_none(self):
        provider = Provider("test", "cmd")
        assert provider.tools is None
        assert provider.mcp_servers is None

    def test_tools_allowlist_roundtrip(self):
        provider = Provider("test", "cmd", tools=["tool-a", "tool-b"])
        d = provider.to_dict()
        assert d["tools"] == ["tool-a", "tool-b"]
        restored = Provider.from_dict(d)
        assert restored.tools == ["tool-a", "tool-b"]

    def test_mcp_servers_roundtrip(self):
        provider = Provider("test", "cmd", mcp_servers=["filesystem"])
        d = provider.to_dict()
        assert d["mcp_servers"] == ["filesystem"]
        restored = Provider.from_dict(d)
        assert restored.mcp_servers == ["filesystem"]

    def test_tools_not_in_dict_when_none(self):
        provider = Provider("test", "cmd")
        assert "tools" not in provider.to_dict()
        assert "mcp_servers" not in provider.to_dict()

    def test_empty_allowlists_survive_roundtrip(self):
        provider = Provider("locked", "cmd", tools=[], mcp_servers=[])
        serialized = provider.to_dict()
        assert serialized["tools"] == []
        assert serialized["mcp_servers"] == []

        restored = Provider.from_dict(serialized)
        assert restored.tools == []
        assert restored.mcp_servers == []

    @pytest.mark.parametrize(
        ("field", "value"),
        [
            ("tools", "tool-a"),
            ("tools", [""]),
            ("tools", [1]),
            ("mcp_servers", "filesystem"),
            ("mcp_servers", [""]),
            ("mcp_servers", [1]),
        ],
    )
    def test_rejects_invalid_access_policies(self, field, value):
        with pytest.raises(ValueError, match=field):
            Provider("test", "cmd", **{field: value})