import unittest
from datetime import datetime
import xml.etree.ElementTree as ET

from sia.command import Command
from sia.delete_command import DeleteCommand
from sia.stop_command import StopCommand
from sia.entry import Entry
from sia.background_entry import BackgroundEntry
from sia.entry.parse_error_entry import ParseErrorEntry
from sia.read_entry import ReadEntry
from sia.reasoning_entry import ReasoningEntry
from sia.repeat_entry import RepeatEntry
from sia.single_entry import SingleEntry
from sia.entry.write_entry import WriteEntry
from sia.web_io_buffer import WebIOBuffer
from sia.response_parser import ResponseParser

class ResponseParserTest(unittest.TestCase):
    def setUp(self):
        """Set up test cases with parser and IO buffer"""
        self.io_buffer = WebIOBuffer()
        self.parser = ResponseParser(self.io_buffer)
        
    def test_delete_command(self):
        """Test parsing delete command"""
        xml = '<delete id="test-id-123"/>'
        result = self.parser.parse(xml)
        
        self.assertIsInstance(result, DeleteCommand)
        self.assertEqual(result.id, "test-id-123")
        
    def test_delete_command_missing_id(self):
        """Test parsing delete command without ID returns error entry"""
        xml = '<delete/>'
        result = self.parser.parse(xml)
        
        self.assertIsInstance(result, ParseErrorEntry)
        self.assertEqual(result.content, xml)
        self.assertIn("missing required 'id'", result.error)
        
    def test_stop_command(self):
        """Test parsing stop command"""
        xml = '<stop/>'
        result = self.parser.parse(xml)
        
        self.assertIsInstance(result, StopCommand)
        
    def test_background_entry(self):
        """Test parsing background entry"""
        xml = '<background>echo test</background>'
        result = self.parser.parse(xml)
        
        self.assertIsInstance(result, BackgroundEntry)
        self.assertEqual(result.script, "echo test")        

    def test_background_entry_empty_script(self):
        """Test parsing background entry with empty script returns error entry"""
        xml = '<background/>'
        result = self.parser.parse(xml)
        
        self.assertIsInstance(result, ParseErrorEntry)
        self.assertEqual(result.content, xml)
        self.assertIn("Background entry requires (only) script content", result.error)
        
    def test_repeat_entry(self):
        """Test parsing repeat entry"""
        xml = '<repeat>ls -l</repeat>'
        result = self.parser.parse(xml)
        
        self.assertIsInstance(result, RepeatEntry)
        self.assertEqual(result.script, "ls -l")
        
    def test_repeat_entry_empty_script(self):
        """Test parsing repeat entry with empty script returns error entry"""
        xml = '<repeat/>'
        result = self.parser.parse(xml)
        
        self.assertIsInstance(result, ParseErrorEntry)
        self.assertEqual(result.content, xml)
        self.assertIn("Repeat entry requires (only) script content", result.error)
        
    def test_single_entry(self):
        """Test parsing single shot entry"""
        xml = '<single>echo "one time"</single>'
        result = self.parser.parse(xml)
        
        self.assertIsInstance(result, SingleEntry)
        self.assertEqual(result.script, 'echo "one time"')
        
    def test_single_entry_empty_script(self):
        """Test parsing single shot entry with empty script returns error entry"""
        xml = '<single/>'
        result = self.parser.parse(xml)
        
        self.assertIsInstance(result, ParseErrorEntry)
        self.assertEqual(result.content, xml)
        self.assertIn("Single entry requires (only) script content", result.error)
        
    def test_reasoning_entry(self):
        """Test parsing reasoning entry"""
        xml = '<reasoning>test reasoning</reasoning>'
        result = self.parser.parse(xml)
        
        self.assertIsInstance(result, ReasoningEntry)
        self.assertEqual(result.content, "test reasoning")
        
    def test_reasoning_entry_empty_content(self):
        """Test parsing reasoning entry with empty content returns error entry"""
        xml = '<reasoning/>'
        result = self.parser.parse(xml)
        
        self.assertIsInstance(result, ParseErrorEntry)
        self.assertEqual(result.content, xml)
        self.assertIn("Reasoning entry requires (only) text content", result.error)
        
    def test_read_stdin_entry(self):
        """Test parsing read stdin entry"""
        xml = '<read_stdin/>'
        result = self.parser.parse(xml)
        
        self.assertIsInstance(result, ReadEntry)
        
    def test_write_stdout_entry(self):
        """Test parsing write stdout entry"""
        xml = '<write_stdout>test output</write_stdout>'
        result = self.parser.parse(xml)
        
        self.assertIsInstance(result, WriteEntry)
        self.assertEqual(result.content, "test output")
        self.assertEqual(result.io_buffer, self.io_buffer)
        
    def test_write_stdout_entry_empty_content(self):
        """Test parsing write stdout entry with empty content returns error entry"""
        xml = '<write_stdout/>'
        result = self.parser.parse(xml)
        
        self.assertIsInstance(result, ParseErrorEntry)
        self.assertEqual(result.content, xml)
        self.assertIn("Write stdout entry requires (only) text content", result.error)
        
    def test_unknown_element(self):
        """Test parsing unknown element returns error entry"""
        xml = '<unknown>test</unknown>'
        result = self.parser.parse(xml)
        
        self.assertIsInstance(result, ParseErrorEntry)
        self.assertEqual(result.content, xml)
        self.assertIn("Unknown root element", result.error)
        
    def test_malformed_xml(self):
        """Test parsing malformed XML returns error entry"""
        xml = '<unclosed>'
        result = self.parser.parse(xml)
        
        self.assertIsInstance(result, ParseErrorEntry)
        self.assertEqual(result.content, xml)
        self.assertIn("Invalid XML", result.error)
            
    def test_entry_id_generation(self):
        """Test that unique IDs are generated for entries"""
        xml1 = '<reasoning>test 1</reasoning>'
        xml2 = '<reasoning>test 2</reasoning>'
        
        result1 = self.parser.parse(xml1)
        result2 = self.parser.parse(xml2)
        
        self.assertNotEqual(result1.id, result2.id)
        
    def test_whitespace_handling(self):
        """Test handling of whitespace in XML"""
        xml = """
            <reasoning>
                test content
                with multiple lines
            </reasoning>
        """
        result = self.parser.parse(xml)
        
        self.assertIsInstance(result, ReasoningEntry)
        self.assertTrue(result.content.strip())
        
    def test_cdata_content(self):
        """Test parsing content with CDATA sections"""
        xml = """
            <reasoning><![CDATA[Test content with <special> & chars]]></reasoning>
        """
        result = self.parser.parse(xml)
        self.assertIsInstance(result, ReasoningEntry)
        self.assertEqual(result.content, "Test content with <special> & chars")
        
    def test_empty_element_with_attributes(self):
        """Test parsing empty element with attributes"""
        xml = '<read_stdin id="123" timestamp="2024-01-01"/>'
        result = self.parser.parse(xml)
        self.assertIsInstance(result, ReadEntry)
        
    def test_error_in_content_extraction(self):
        """Test handling errors during content extraction"""
        xml = '<single><![CDATA[test]]>'  # Malformed CDATA
        result = self.parser.parse(xml)
        
        self.assertIsInstance(result, ParseErrorEntry)
        self.assertEqual(result.content, xml)
        self.assertIn("Invalid XML", result.error)