"""Tests for output collection system."""

import json
import tempfile
import os
from unittest.mock import Mock

from output.collectors.metrics_collector import MetricsCollector
from output.collectors.entity_collector import EntityCollector
from output.formatters.json_formatter import JSONFormatter
from output.formatters.csv_formatter import CSVFormatter
from output.writers.file_writer import FileWriter


class TestMetricsCollector:
    """Test metrics collector functionality."""

    def test_collect_data(self):
        """Test metrics data collection."""
        collector = MetricsCollector(collection_interval=100)

        # Create mock simulation core
        mock_sim_core = Mock()
        mock_sim_core.get_world_state.return_value = {
            'tick_count': 1500,
            'actual_tps': 58.5,
            'target_tps': 60.0,
            'speed_multiplier': 1.0,
            'is_paused': False,
            'sprint_mode': False,
            'world_buffer': 1,
            'entity_counts': {
                'total': 25,
                'cells': 20,
                'food': 5
            }
        }

        # Mock timing
        mock_sim_core.timing = Mock()
        mock_sim_core.timing.last_tick_time = 1234567890.5

        data = collector.collect(mock_sim_core)

        assert data['tick_count'] == 1500
        assert data['actual_tps'] == 58.5
        assert data['target_tps'] == 60.0
        assert data['speed_multiplier'] == 1.0
        assert data['is_paused'] == False
        assert data['sprint_mode'] == False
        assert data['world_buffer'] == 1
        assert data['entity_counts'] == {
            'total': 25,
            'cells': 20,
            'food': 5
        }
        assert data['collection_type'] == 'metrics'
        assert data['timestamp'] == 1234567890.5


class TestEntityCollector:
    """Test entity collector functionality."""

    def test_collect_cells_only(self):
        """Test collecting only cell entities."""
        collector = EntityCollector(
            collection_interval=1000,
            include_cells=True,
            include_food=False
        )

        # Create mock simulation core with entity states
        mock_sim_core = Mock()
        mock_sim_core.get_world_state.return_value = {
            'tick_count': 1000
        }
        mock_sim_core.get_entity_states.return_value = [
            {
                'id': 1,
                'type': 'cell',
                'position': {'x': 10, 'y': 20},
                'energy': 75.5,
                'age': 150,
                'generation': 3,
                'neural_network': {'layer_sizes': [4, 6, 2]}
            },
            {
                'id': 2,
                'type': 'food',
                'position': {'x': 30, 'y': 40},
                'decay': 50,
                'max_decay': 100
            }
        ]

        data = collector.collect(mock_sim_core)

        assert len(data['entities']) == 1  # Only cell included
        assert data['entities'][0]['type'] == 'cell'
        assert data['entities'][0]['id'] == 1
        assert data['collection_type'] == 'entities'

    

class TestJSONFormatter:
    """Test JSON formatter functionality."""

    def test_format_data(self):
        """Test JSON data formatting."""
        formatter = JSONFormatter()

        test_data = {
            'tick_count': 1000,
            'actual_tps': 58.5,
            'entity_counts': {
                'cells': 20,
                'food': 5
            }
        }

        formatted = formatter.format(test_data)

        assert isinstance(formatted, str)

        # Verify it's valid JSON
        parsed = json.loads(formatted)
        assert parsed['tick_count'] == 1000
        assert parsed['actual_tps'] == 58.5
        assert parsed['entity_counts']['cells'] == 20


class TestCSVFormatter:
    """Test CSV formatter functionality."""

    def test_format_simple_data(self):
        """Test CSV formatting for simple data."""
        formatter = CSVFormatter()

        test_data = {
            'tick_count': 1000,
            'actual_tps': 58.5,
            'is_paused': False
        }

        formatted = formatter.format(test_data)

        assert isinstance(formatted, str)
        lines = formatted.strip().split('\n')

        # Should have header and one data row
        assert len(lines) == 2

        # Check header
        header = lines[0]
        assert 'tick_count' in header
        assert 'actual_tps' in header
        assert 'is_paused' in header

        # Check data row
        data_row = lines[1]
        assert '1000' in data_row
        assert '58.5' in data_row

    def test_get_file_extension(self):
        """Test file extension."""
        formatter = CSVFormatter()
        assert formatter.get_file_extension() == 'csv'


class TestFileWriter:
    """Test file writer functionality."""

    def test_write_data(self):
        """Test writing data to file."""
        # Create temporary directory
        with tempfile.TemporaryDirectory() as temp_dir:
            writer = FileWriter(temp_dir)

            # Should be ready now
            assert writer.is_ready() == True

            # Write test data
            test_data = '{"tick_count": 1000, "actual_tps": 58.5}'
            filename = "test_data.json"

            writer.write(test_data, filename)

            # Verify file was created
            file_path = os.path.join(temp_dir, filename)
            assert os.path.exists(file_path)

            # Verify file content
            with open(file_path, 'r') as f:
                content = f.read()
                assert content == test_data