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

from agentscope.tool import ToolChunk, Read
from agentscope.permission import (
    PermissionContext,
    PermissionBehavior,
    PermissionRule,
)
from agentscope.message import TextBlock


class ReadToolTest(IsolatedAsyncioTestCase):
    """The read tool test case."""

    async def asyncSetUp(self) -> None:
        """The async setup method."""
        self.read_tool = Read()
        # Create a temporary file for testing
        self.temp_file = tempfile.NamedTemporaryFile(
            mode="w",
            delete=False,
            suffix=".txt",
        )
        # Write multiple lines
        for i in range(1, 11):
            self.temp_file.write(f"Line {i}\n")
        self.temp_file.close()

    async def asyncTearDown(self) -> None:
        """Clean up temporary files."""
        if os.path.exists(self.temp_file.name):
            os.unlink(self.temp_file.name)

    async def test_tool_properties(self) -> None:
        """Test read tool properties."""
        self.assertEqual(self.read_tool.name, "Read")
        self.assertIsInstance(self.read_tool.description, str)
        self.assertIsInstance(self.read_tool.input_schema, dict)
        self.assertFalse(self.read_tool.is_mcp)
        self.assertTrue(self.read_tool.is_read_only)
        self.assertTrue(self.read_tool.is_concurrency_safe)

    async def test_check_permissions(self) -> None:
        """Test read tool permission checking."""
        context = PermissionContext()
        tool_input = {"file_path": "/tmp/test.txt"}
        decision = await self.read_tool.check_permissions(tool_input, context)

        # Read/Glob/Grep are read-only, return PASSTHROUGH
        self.assertEqual(decision.behavior, PermissionBehavior.PASSTHROUGH)

    async def test_simple_read(self) -> None:
        """Test simple file reading."""
        chunk = await self.read_tool(file_path=self.temp_file.name)

        self.assertIsInstance(chunk, ToolChunk)
        self.assertEqual(chunk.state, "running")
        self.assertEqual(len(chunk.content), 1)
        self.assertIsInstance(chunk.content[0], TextBlock)

        content = chunk.content[0].text
        # Should contain all lines with line numbers
        self.assertIn("Line 1", content)
        self.assertIn("Line 10", content)

    async def test_read_with_offset(self) -> None:
        """Test reading with offset."""
        chunk = await self.read_tool(
            file_path=self.temp_file.name,
            offset=5,
        )

        self.assertEqual(chunk.state, "running")
        content = chunk.content[0].text

        # Should start from line 5
        self.assertIn("Line 5", content)
        # Line 1 should not appear (but Line 10 contains "1",
        # so check more specifically)
        lines = content.split("\n")
        line_numbers = [
            int(line.split("\t")[0].strip()) for line in lines if line.strip()
        ]
        self.assertNotIn(1, line_numbers)
        self.assertIn(5, line_numbers)

    async def test_read_with_limit(self) -> None:
        """Test reading with limit."""
        chunk = await self.read_tool(
            file_path=self.temp_file.name,
            offset=1,
            limit=3,
        )

        self.assertEqual(chunk.state, "running")
        content = chunk.content[0].text

        # Should only read 3 lines
        self.assertIn("Line 1", content)
        self.assertIn("Line 2", content)
        self.assertIn("Line 3", content)
        self.assertNotIn("Line 4", content)

    async def test_read_nonexistent_file(self) -> None:
        """Test reading a non-existent file."""
        chunk = await self.read_tool(file_path="/nonexistent/file.txt")

        self.assertEqual(chunk.state, "error")
        self.assertIn("does not exist", chunk.content[0].text)

    async def test_read_directory(self) -> None:
        """Test reading a directory (should fail)."""
        temp_dir = tempfile.mkdtemp()
        try:
            chunk = await self.read_tool(file_path=temp_dir)

            self.assertEqual(chunk.state, "error")
            self.assertIn("directory", chunk.content[0].text.lower())
        finally:
            os.rmdir(temp_dir)

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

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

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

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

        # Test empty file_path
        self.assertFalse(
            await self.read_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.read_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.read_tool.generate_suggestions(
            {"file_path": "/test.py"},
        )
        self.assertGreater(len(suggestions), 0)