"""Tests for edit tools: str_replace and patch_apply (Phase 6)."""

from pathlib import Path
from unittest.mock import patch as mock_patch

import pytest

from app.models.config import AppConfig, load_config
from app.models.tool_call import ToolResultStatus
from app.tools.edit import PatchApplyTool, StrReplaceTool


@pytest.fixture
def config() -> AppConfig:
    return load_config()


@pytest.fixture
def tmp_workspace(tmp_path: Path, config: AppConfig) -> tuple[Path, AppConfig]:
    """Create a temporary workspace for edit tests."""
    config.agent.workspace_root = tmp_path
    return tmp_path, config


# --- StrReplaceTool ---


class TestStrReplaceTool:
    def test_replace_unique_match(self, tmp_workspace: tuple[Path, AppConfig]) -> None:
        ws, cfg = tmp_workspace
        (ws / "test.py").write_text("def hello():\n    return 'hello'\n")
        tool = StrReplaceTool(ws, cfg)
        result = tool.run(
            "tc-1",
            {"file_path": "test.py", "old_str": "return 'hello'", "new_str": "return 'world'"},
        )
        assert result.status == ToolResultStatus.SUCCESS
        assert "1 occurrence" in result.output
        assert (ws / "test.py").read_text() == "def hello():\n    return 'world'\n"

    def test_replace_no_match(self, tmp_workspace: tuple[Path, AppConfig]) -> None:
        ws, cfg = tmp_workspace
        (ws / "test.py").write_text("some content")
        tool = StrReplaceTool(ws, cfg)
        result = tool.run(
            "tc-2",
            {"file_path": "test.py", "old_str": "nonexistent", "new_str": "replacement"},
        )
        assert result.status == ToolResultStatus.ERROR
        assert "not found" in (result.error or "").lower()

    def test_replace_multiple_matches_fails(self, tmp_workspace: tuple[Path, AppConfig]) -> None:
        ws, cfg = tmp_workspace
        (ws / "test.py").write_text("foo bar foo baz foo")
        tool = StrReplaceTool(ws, cfg)
        result = tool.run(
            "tc-3",
            {"file_path": "test.py", "old_str": "foo", "new_str": "qux"},
        )
        assert result.status == ToolResultStatus.ERROR
        assert "3 times" in (result.error or "")

    def test_replace_nonexistent_file(self, tmp_workspace: tuple[Path, AppConfig]) -> None:
        ws, cfg = tmp_workspace
        tool = StrReplaceTool(ws, cfg)
        result = tool.run(
            "tc-4",
            {"file_path": "missing.py", "old_str": "a", "new_str": "b"},
        )
        assert result.status == ToolResultStatus.ERROR
        assert "not found" in (result.error or "").lower()

    def test_replace_path_traversal_blocked(self, tmp_workspace: tuple[Path, AppConfig]) -> None:
        ws, cfg = tmp_workspace
        tool = StrReplaceTool(ws, cfg)
        result = tool.run(
            "tc-5",
            {"file_path": "../../etc/passwd", "old_str": "a", "new_str": "b"},
        )
        assert result.status == ToolResultStatus.ERROR
        assert "outside" in (result.error or "").lower()


# --- PatchApplyTool ---


class TestPatchApplyTool:
    def test_apply_valid_patch(self, tmp_workspace: tuple[Path, AppConfig]) -> None:
        ws, cfg = tmp_workspace
        (ws / "target.txt").write_text("line1\nline2\nline3\n")
        patch_text = (
            "--- a/target.txt\n"
            "+++ b/target.txt\n"
            "@@ -1,3 +1,3 @@\n"
            " line1\n"
            "-line2\n"
            "+line2_modified\n"
            " line3\n"
        )
        tool = PatchApplyTool(ws, cfg)
        result = tool.run("tc-1", {"file_path": "target.txt", "patch": patch_text})
        assert result.status == ToolResultStatus.SUCCESS
        assert "line2_modified" in (ws / "target.txt").read_text()

    def test_apply_bad_patch(self, tmp_workspace: tuple[Path, AppConfig]) -> None:
        ws, cfg = tmp_workspace
        (ws / "target.txt").write_text("line1\nline2\n")
        tool = PatchApplyTool(ws, cfg)
        result = tool.run(
            "tc-2",
            {"file_path": "target.txt", "patch": "this is not a valid patch"},
        )
        assert result.status == ToolResultStatus.ERROR

    def test_apply_nonexistent_file(self, tmp_workspace: tuple[Path, AppConfig]) -> None:
        ws, cfg = tmp_workspace
        tool = PatchApplyTool(ws, cfg)
        result = tool.run(
            "tc-3",
            {"file_path": "missing.txt", "patch": "--- a\n+++ b\n"},
        )
        assert result.status == ToolResultStatus.ERROR
        assert "not found" in (result.error or "").lower()

    def test_apply_path_traversal_blocked(self, tmp_workspace: tuple[Path, AppConfig]) -> None:
        ws, cfg = tmp_workspace
        tool = PatchApplyTool(ws, cfg)
        result = tool.run(
            "tc-4",
            {"file_path": "../../etc/passwd", "patch": "--- a\n+++ b\n"},
        )
        assert result.status == ToolResultStatus.ERROR
        assert "outside" in (result.error or "").lower()

    def test_apply_timeout(self, tmp_workspace: tuple[Path, AppConfig]) -> None:
        ws, cfg = tmp_workspace
        (ws / "target.txt").write_text("content\n")
        tool = PatchApplyTool(ws, cfg)
        with mock_patch("app.tools.edit.subprocess.run", side_effect=__import__("subprocess").TimeoutExpired("patch", 30)):
            result = tool.run(
                "tc-5",
                {"file_path": "target.txt", "patch": "--- a\n+++ b\n"},
            )
        assert result.status == ToolResultStatus.ERROR
        assert "timed out" in (result.error or "").lower()