#!/usr/bin/env python3
"""Headless simulation entry point - runs simulations without UI."""

import sys
import argparse
from pathlib import Path

# Add project root to path
project_root = Path(__file__).parent.parent
sys.path.insert(0, str(project_root))

from config import ConfigLoader, HeadlessConfig
from engines import HeadlessSimulationEngine, HeadlessConfig as EngineHeadlessConfig


def main():
    """Main entry point for headless simulation."""
    parser = argparse.ArgumentParser(description="Run headless simulation")
    parser.add_argument(
        "--config", "-c",
        type=str,
        help="Path to configuration file (JSON/YAML)",
        default=None
    )
    parser.add_argument(
        "--output-dir", "-o",
        type=str,
        help="Output directory for simulation data",
        default="simulation_output"
    )
    parser.add_argument(
        "--max-ticks", "-t",
        type=int,
        help="Maximum number of ticks to run",
        default=None
    )
    parser.add_argument(
        "--max-duration", "-d",
        type=float,
        help="Maximum duration in seconds",
        default=None
    )
    parser.add_argument(
        "--tps",
        type=float,
        help="Target TPS for simulation (default: unlimited speed)",
        default=None
    )
    parser.add_argument(
        "--real-time",
        action="store_true",
        help="Run in real-time mode (instead of as fast as possible)"
    )
    parser.add_argument(
        "--collect-metrics",
        action="store_true",
        help="Enable metrics data collection"
    )
    parser.add_argument(
        "--collect-entities",
        action="store_true",
        help="Enable entity data collection"
    )
    parser.add_argument(
        "--collect-evolution",
        action="store_true",
        help="Enable evolution data collection"
    )
    parser.add_argument(
        "--collect-all",
        action="store_true",
        help="Enable all data collection (metrics, entities, evolution)"
    )
    parser.add_argument(
        "--collect-every-tick",
        action="store_true",
        help="Collect data on every tick instead of at intervals"
    )
    parser.add_argument(
        "--create-sample-configs",
        action="store_true",
        help="Create sample configuration files and exit"
    )

    args = parser.parse_args()

    # Create sample configs if requested
    if args.create_sample_configs:
        ConfigLoader.create_sample_configs()
        return

    # Load configuration
    try:
        if args.config:
            headless_config = ConfigLoader.load_headless_config(args.config)
        else:
            headless_config = ConfigLoader.get_default_headless_config()

        # Override config with command line arguments
        if args.max_ticks:
            headless_config.max_ticks = args.max_ticks
        if args.max_duration:
            headless_config.max_duration = args.max_duration
        if args.tps is not None:
            headless_config.simulation.default_tps = args.tps
        else:
            # No TPS specified - run at maximum speed
            headless_config.simulation.default_tps = 999999999.0
        if args.output_dir:
            headless_config.output.directory = args.output_dir
        if args.real_time:
            headless_config.output.real_time = True
        # Handle data collection arguments - only enable if explicitly requested
        # Start with all disabled (default)
        headless_config.output.collect_metrics = False
        headless_config.output.collect_entities = False
        headless_config.output.collect_evolution = False

        if args.collect_all:
            # Enable all collection
            headless_config.output.collect_metrics = True
            headless_config.output.collect_entities = True
            headless_config.output.collect_evolution = True
        else:
            # Enable specific collection types
            if args.collect_metrics:
                headless_config.output.collect_metrics = True
            if args.collect_entities:
                headless_config.output.collect_entities = True
            if args.collect_evolution:
                headless_config.output.collect_evolution = True

        if args.collect_every_tick:
            # Set all collection intervals to 1 for every-tick collection
            headless_config.output.metrics_interval = 1
            headless_config.output.entities_interval = 1
            headless_config.output.evolution_interval = 1
            # Also enable all collection if using --collect-every-tick (backward compatibility)
            headless_config.output.collect_metrics = True
            headless_config.output.collect_entities = True
            headless_config.output.collect_evolution = True

    except Exception as e:
        print(f"Error loading configuration: {e}")
        sys.exit(1)

    # Create engine configuration
    engine_config = EngineHeadlessConfig(
        simulation=headless_config.simulation,
        max_ticks=headless_config.max_ticks,
        max_duration=headless_config.max_duration,
        output_dir=headless_config.output.directory,
        enable_metrics=headless_config.output.collect_metrics,
        enable_entities=headless_config.output.collect_entities,
        enable_evolution=headless_config.output.collect_evolution,
        metrics_interval=headless_config.output.metrics_interval,
        entities_interval=headless_config.output.entities_interval,
        evolution_interval=headless_config.output.evolution_interval,
        output_formats=headless_config.output.formats,
        real_time=headless_config.output.real_time
    )

    # Create and run simulation
    try:
        print("Starting headless simulation...")
        engine = HeadlessSimulationEngine(engine_config)
        summary = engine.run()

        # Print summary
        print("\n" + "="*50)
        print("SIMULATION SUMMARY")
        print("="*50)
        print(f"Total ticks: {summary['runtime']['total_ticks']}")
        print(f"Duration: {summary['runtime']['duration_seconds']:.2f} seconds")
        print(f"Average TPS: {summary['runtime']['average_tps']:.2f}")
        print(f"Final entity counts: {summary['final_state']['entity_counts']}")
        print(f"Output directory: {summary['data_collection']['output_directory']}")

    except KeyboardInterrupt:
        print("\nSimulation interrupted by user")
        sys.exit(0)
    except Exception as e:
        print(f"Simulation error: {e}")
        import traceback
        traceback.print_exc()
        sys.exit(1)


if __name__ == "__main__":
    main()