# -*- coding: utf-8 -*-
"""Write tool test case."""
import os
import tempfile
from unittest.async_case import IsolatedAsyncioTestCase

from agentscope.tool import Write
from agentscope.permission import (
    PermissionContext,
    PermissionBehavior,
    PermissionRule,
)
from agentscope.state import AgentState
from agentscope.message import ToolResultState


class WriteToolTest(IsolatedAsyncioTestCase):
    """The write tool test case."""

    async def asyncSetUp(self) -> None:
        """The async setup method."""
        self.write_tool = Write()
        self.temp_dir = tempfile.mkdtemp()

    async def asyncTearDown(self) -> None:
        """Clean up temporary files."""
        import shutil

        if os.path.exists(self.temp_dir):
            shutil.rmtree(self.temp_dir)

    async def test_tool_properties(self) -> None:
        """Test write tool properties."""
        self.assertEqual(self.write_tool.name, "Write")
        self.assertIsInstance(self.write_tool.description, str)
        self.assertIsInstance(self.write_tool.input_schema, dict)
        self.assertFalse(self.write_tool.is_mcp)
        self.assertFalse(self.write_tool.is_read_only)
        self.assertFalse(self.write_tool.is_concurrency_safe)

    async def test_check_permissions(self) -> None:
        """Test write tool permission checking.

        Write tool should return PASSTHROUGH for non-dangerous paths,
        allowing PermissionEngine to check allow rules.
        """
        context = PermissionContext()
        tool_input = {"file_path": "/tmp/test.txt"}
        decision = await self.write_tool.check_permissions(tool_input, context)

        self.assertEqual(decision.behavior, PermissionBehavior.PASSTHROUGH)

    async def test_simple_write(self) -> None:
        """Test simple file writing."""
        file_path = os.path.join(self.temp_dir, "test.txt")
        content = "Hello World\nThis is a test\n"

        chunk = await self.write_tool(
            file_path=file_path,
            content=content,
        )

        self.assertEqual(chunk.state, "running")
        self.assertTrue(chunk.is_last)

        # Verify file was created and content is correct
        self.assertTrue(os.path.exists(file_path))
        with open(file_path, "r", encoding="utf-8") as f:
            written_content = f.read()
        self.assertEqual(written_content, content)

    async def test_write_creates_directory(self) -> None:
        """Test that write creates parent directories."""
        file_path = os.path.join(self.temp_dir, "subdir", "test.txt")
        content = "Test content"

        chunk = await self.write_tool(
            file_path=file_path,
            content=content,
        )

        self.assertEqual(chunk.state, "running")

        # Verify directory and file were created
        self.assertTrue(os.path.exists(file_path))
        with open(file_path, "r", encoding="utf-8") as f:
            written_content = f.read()
        self.assertEqual(written_content, content)

    async def test_write_overwrites_existing(self) -> None:
        """Test that write overwrites existing files."""
        file_path = os.path.join(self.temp_dir, "test.txt")

        # Write initial content
        with open(file_path, "w", encoding="utf-8") as f:
            f.write("Initial content")

        # Overwrite with new content
        new_content = "New content"
        chunk = await self.write_tool(
            file_path=file_path,
            content=new_content,
        )

        self.assertEqual(len([chunk]), 1)

        # Verify content was overwritten
        with open(file_path, "r", encoding="utf-8") as f:
            written_content = f.read()
        self.assertEqual(written_content, new_content)
        self.assertNotIn("Initial", written_content)

    async def test_write_empty_content(self) -> None:
        """Test writing empty content."""
        file_path = os.path.join(self.temp_dir, "empty.txt")

        chunk = await self.write_tool(
            file_path=file_path,
            content="",
        )

        self.assertEqual(len([chunk]), 1)
        self.assertTrue(os.path.exists(file_path))

        with open(file_path, "r", encoding="utf-8") as f:
            content = f.read()
        self.assertEqual(content, "")

    async def test_overwrite_existing_without_prior_read_errors(self) -> None:
        """Overwriting an existing file via state-injected call requires
        the file to have been read first (cached in tool_context).
        """
        file_path = os.path.join(self.temp_dir, "existing.txt")
        with open(file_path, "w", encoding="utf-8") as f:
            f.write("original")

        state = AgentState()
        chunk = await self.write_tool(
            file_path=file_path,
            content="new",
            _agent_state=state,
        )

        self.assertEqual(chunk.state, ToolResultState.ERROR)
        self.assertIn("has not been read", chunk.content[0].text)
        # File must not have been mutated
        with open(file_path, "r", encoding="utf-8") as f:
            self.assertEqual(f.read(), "original")

    async def test_match_rule_glob_pattern(self) -> None:
        """Test match_rule with glob patterns."""
        # Test exact match
        self.assertTrue(
            await self.write_tool.match_rule(
                "test.py",
                {"file_path": "test.py"},
            ),
        )

        # Test wildcard pattern
        self.assertTrue(
            await self.write_tool.match_rule(
                "*.py",
                {"file_path": "test.py"},
            ),
        )

        # Test directory pattern
        self.assertTrue(
            await self.write_tool.match_rule(
                "/tmp/**",
                {"file_path": "/tmp/test.py"},
            ),
        )

        # Test non-matching pattern
        self.assertFalse(
            await self.write_tool.match_rule(
                "*.txt",
                {"file_path": "test.py"},
            ),
        )

        # Test empty file_path
        self.assertFalse(
            await self.write_tool.match_rule(
                "*.py",
                {"file_path": ""},
            ),
        )

    async def test_generate_suggestions(self) -> None:
        """Test generate_suggestions for file operations."""

        # Test suggestion for file in subdirectory
        suggestions = await self.write_tool.generate_suggestions(
            {"file_path": "/tmp/project/src/main.py"},
        )

        self.assertIsInstance(suggestions, list)
        self.assertGreater(len(suggestions), 0)
        self.assertIsInstance(suggestions[0], PermissionRule)

        # Should suggest parent directory pattern
        suggestion_contents = [s.rule_content for s in suggestions]
        self.assertIn("/tmp/project/src/**", suggestion_contents)

        # Test suggestion for file in root
        suggestions = await self.write_tool.generate_suggestions(
            {"file_path": "/test.py"},
        )
        self.assertGreater(len(suggestions), 0)