package com.openosrs.client.core;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.Map;
import java.util.HashMap;
import java.util.List;
import java.util.ArrayList;
import java.util.Queue;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentLinkedQueue;
import java.util.concurrent.atomic.AtomicLong;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;
import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;
import java.io.FileWriter;
import java.io.IOException;

/**
 * Additional components for the AgentTestingFramework.
 */

// ================================
// SCENARIO SIMULATION
// ================================

/**
 * Simulates various game scenarios for testing.
 */
class ScenarioSimulator {
    private static final Logger logger = LoggerFactory.getLogger(ScenarioSimulator.class);
    
    private final Map<ScenarioType, ScenarioHandler> handlers;
    
    public ScenarioSimulator() {
        this.handlers = new HashMap<>();
        initializeHandlers();
    }
    
    public void initialize() {
        logger.info("ScenarioSimulator initialized with {} scenario types", handlers.size());
    }
    
    public void setupScenario(TestContext context, ScenarioType scenario) {
        ScenarioHandler handler = handlers.get(scenario);
        if (handler != null) {
            handler.setup(context);
        } else {
            logger.warn("No handler found for scenario type: {}", scenario);
        }
    }
    
    private void initializeHandlers() {
        handlers.put(ScenarioType.BASIC_GAMEPLAY, new BasicGameplayHandler());
        handlers.put(ScenarioType.PERFORMANCE_STRESS, new PerformanceStressHandler());
        handlers.put(ScenarioType.SCRIPTING_AUTOMATION, new ScriptingAutomationHandler());
        handlers.put(ScenarioType.INTERFACE_INTERACTION, new InterfaceInteractionHandler());
        handlers.put(ScenarioType.NETWORK_CONDITIONS, new NetworkConditionsHandler());
        handlers.put(ScenarioType.MEMORY_PRESSURE, new MemoryPressureHandler());
        handlers.put(ScenarioType.CONCURRENT_AGENTS, new ConcurrentAgentsHandler());
        handlers.put(ScenarioType.ERROR_RECOVERY, new ErrorRecoveryHandler());
    }
    
    interface ScenarioHandler {
        void setup(TestContext context);
    }
    
    static class BasicGameplayHandler implements ScenarioHandler {
        @Override
        public void setup(TestContext context) {
            context.setData("scenario_type", "basic_gameplay");
            context.setData("player_level", 50);
            context.setData("location", "lumbridge");
        }
    }
    
    static class PerformanceStressHandler implements ScenarioHandler {
        @Override
        public void setup(TestContext context) {
            context.setData("scenario_type", "performance_stress");
            context.setData("event_frequency", "high");
            context.setData("memory_pressure", true);
        }
    }
    
    static class ScriptingAutomationHandler implements ScenarioHandler {
        @Override
        public void setup(TestContext context) {
            context.setData("scenario_type", "scripting_automation");
            context.setData("scripting_enabled", true);
            context.setData("automation_level", "advanced");
        }
    }
    
    static class InterfaceInteractionHandler implements ScenarioHandler {
        @Override
        public void setup(TestContext context) {
            context.setData("scenario_type", "interface_interaction");
            context.setData("interface_complexity", "high");
            context.setData("response_delays", true);
        }
    }
    
    static class NetworkConditionsHandler implements ScenarioHandler {
        @Override
        public void setup(TestContext context) {
            context.setData("scenario_type", "network_conditions");
            context.setData("latency_simulation", 200);
            context.setData("packet_loss", 0.05);
        }
    }
    
    static class MemoryPressureHandler implements ScenarioHandler {
        @Override
        public void setup(TestContext context) {
            context.setData("scenario_type", "memory_pressure");
            context.setData("memory_limit", "low");
            context.setData("gc_frequency", "high");
        }
    }
    
    static class ConcurrentAgentsHandler implements ScenarioHandler {
        @Override
        public void setup(TestContext context) {
            context.setData("scenario_type", "concurrent_agents");
            context.setData("agent_count", 5);
            context.setData("resource_contention", true);
        }
    }
    
    static class ErrorRecoveryHandler implements ScenarioHandler {
        @Override
        public void setup(TestContext context) {
            context.setData("scenario_type", "error_recovery");
            context.setData("error_injection", true);
            context.setData("recovery_testing", true);
        }
    }
}

// ================================
// AGENT VALIDATION
// ================================

/**
 * Validates agent behavior and performance.
 */
class AgentValidator {
    private static final Logger logger = LoggerFactory.getLogger(AgentValidator.class);
    
    public boolean validateResult(TestContext context, TestExecutionResult result) {
        if (!result.isSuccess()) {
            return false;
        }
        
        // Scenario-specific validation
        String scenarioType = (String) context.getData("scenario_type");
        if (scenarioType != null) {
            return validateScenarioSpecific(context, result, scenarioType);
        }
        
        return true;
    }
    
    private boolean validateScenarioSpecific(TestContext context, TestExecutionResult result, String scenarioType) {
        switch (scenarioType) {
            case "performance_stress":
                return validatePerformance(context, result);
            case "memory_pressure":
                return validateMemoryUsage(context, result);
            case "network_conditions":
                return validateNetworkResilience(context, result);
            default:
                return true;
        }
    }
    
    private boolean validatePerformance(TestContext context, TestExecutionResult result) {
        // Check if performance metrics are within acceptable bounds
        Map<String, Object> details = result.getDetails();
        if (details.containsKey("execution_time")) {
            long executionTime = (Long) details.get("execution_time");
            return executionTime < 5000; // 5 second limit
        }
        return true;
    }
    
    private boolean validateMemoryUsage(TestContext context, TestExecutionResult result) {
        // Check memory usage metrics
        Map<String, Object> details = result.getDetails();
        if (details.containsKey("memory_used")) {
            long memoryUsed = (Long) details.get("memory_used");
            return memoryUsed < 100 * 1024 * 1024; // 100MB limit
        }
        return true;
    }
    
    private boolean validateNetworkResilience(TestContext context, TestExecutionResult result) {
        // Check network error handling
        Map<String, Object> details = result.getDetails();
        if (details.containsKey("network_errors_handled")) {
            boolean handled = (Boolean) details.get("network_errors_handled");
            return handled;
        }
        return true;
    }
}

// ================================
// MOCK GAME STATE
// ================================

/**
 * Provides isolated game state for testing.
 */
class MockGameState {
    private static final Logger logger = LoggerFactory.getLogger(MockGameState.class);
    
    private final Map<String, Map<String, Object>> isolatedStates;
    
    public MockGameState() {
        this.isolatedStates = new ConcurrentHashMap<>();
    }
    
    public void initialize() {
        logger.info("MockGameState initialized");
    }
    
    public void createIsolatedState(String testId) {
        Map<String, Object> state = new HashMap<>();
        state.put("created_at", System.currentTimeMillis());
        state.put("player_position", Map.of("x", 3200, "y", 3200, "z", 0));
        state.put("inventory", new ArrayList<>());
        state.put("bank", new ArrayList<>());
        state.put("skills", createDefaultSkills());
        
        isolatedStates.put(testId, state);
        logger.debug("Created isolated state for test: {}", testId);
    }
    
    public void destroyIsolatedState(String testId) {
        isolatedStates.remove(testId);
        logger.debug("Destroyed isolated state for test: {}", testId);
    }
    
    public void applyConfiguration(String testId, Map<String, Object> config) {
        Map<String, Object> state = isolatedStates.get(testId);
        if (state != null) {
            state.putAll(config);
        }
    }
    
    public void enableScriptingSupport(String testId) {
        Map<String, Object> state = isolatedStates.get(testId);
        if (state != null) {
            state.put("scripting_enabled", true);
            state.put("script_manager", new MockScriptManager());
        }
    }
    
    public Object getStateValue(String testId, String key) {
        Map<String, Object> state = isolatedStates.get(testId);
        return state != null ? state.get(key) : null;
    }
    
    private Map<String, Integer> createDefaultSkills() {
        Map<String, Integer> skills = new HashMap<>();
        skills.put("attack", 50);
        skills.put("strength", 50);
        skills.put("defence", 50);
        skills.put("ranged", 50);
        skills.put("prayer", 50);
        skills.put("magic", 50);
        skills.put("woodcutting", 50);
        skills.put("fishing", 50);
        skills.put("mining", 50);
        return skills;
    }
    
    static class MockScriptManager {
        public boolean executeScript(String scriptName) {
            // Mock script execution
            return true;
        }
    }
}

// ================================
// PERFORMANCE MONITORING
// ================================

/**
 * Monitors performance metrics during testing.
 */
class PerformanceMonitor {
    private static final Logger logger = LoggerFactory.getLogger(PerformanceMonitor.class);
    
    private final Map<String, PerformanceMetrics> activeMonitors;
    private final ScheduledExecutorService scheduler;
    
    public PerformanceMonitor() {
        this.activeMonitors = new ConcurrentHashMap<>();
        this.scheduler = Executors.newScheduledThreadPool(2, r -> {
            Thread t = new Thread(r, "Performance-Monitor");
            t.setDaemon(true);
            return t;
        });
    }
    
    public void initialize() {
        logger.info("PerformanceMonitor initialized");
    }
    
    public void startMonitoring(String testId) {
        PerformanceMetrics metrics = new PerformanceMetrics(testId);
        activeMonitors.put(testId, metrics);
        
        // Schedule periodic metric collection
        scheduler.scheduleAtFixedRate(() -> {
            collectMetrics(testId);
        }, 1, 1, TimeUnit.SECONDS);
        
        logger.debug("Started performance monitoring for test: {}", testId);
    }
    
    public void stopMonitoring(String testId) {
        PerformanceMetrics metrics = activeMonitors.remove(testId);
        if (metrics != null) {
            metrics.finalize();
        }
        logger.debug("Stopped performance monitoring for test: {}", testId);
    }
    
    public PerformanceMetrics getMetrics(String testId) {
        return activeMonitors.get(testId);
    }
    
    public void shutdown() {
        scheduler.shutdown();
        try {
            if (!scheduler.awaitTermination(2, TimeUnit.SECONDS)) {
                scheduler.shutdownNow();
            }
        } catch (InterruptedException e) {
            scheduler.shutdownNow();
        }
    }
    
    private void collectMetrics(String testId) {
        PerformanceMetrics metrics = activeMonitors.get(testId);
        if (metrics != null) {
            Runtime runtime = Runtime.getRuntime();
            long totalMemory = runtime.totalMemory();
            long freeMemory = runtime.freeMemory();
            long usedMemory = totalMemory - freeMemory;
            
            metrics.recordMemoryUsage(usedMemory);
            metrics.recordCpuUsage(getCurrentCpuUsage());
        }
    }
    
    private double getCurrentCpuUsage() {
        // Simplified CPU usage calculation
        return Math.random() * 100; // Mock value
    }
}

/**
 * Container for performance metrics.
 */
class PerformanceMetrics {
    private final String testId;
    private final long startTime;
    private final List<Long> memorySnapshots;
    private final List<Double> cpuSnapshots;
    private final AtomicLong peakMemory;
    private final AtomicLong totalOperations;
    
    public PerformanceMetrics(String testId) {
        this.testId = testId;
        this.startTime = System.currentTimeMillis();
        this.memorySnapshots = new ArrayList<>();
        this.cpuSnapshots = new ArrayList<>();
        this.peakMemory = new AtomicLong(0);
        this.totalOperations = new AtomicLong(0);
    }
    
    public synchronized void recordMemoryUsage(long memory) {
        memorySnapshots.add(memory);
        peakMemory.updateAndGet(current -> Math.max(current, memory));
    }
    
    public synchronized void recordCpuUsage(double cpu) {
        cpuSnapshots.add(cpu);
    }
    
    public void incrementOperations() {
        totalOperations.incrementAndGet();
    }
    
    public void finalize() {
        // Calculate final metrics
    }
    
    public String getTestId() { return testId; }
    public long getStartTime() { return startTime; }
    public long getDuration() { return System.currentTimeMillis() - startTime; }
    public long getPeakMemory() { return peakMemory.get(); }
    public long getTotalOperations() { return totalOperations.get(); }
    
    public double getAverageMemoryUsage() {
        synchronized (this) {
            return memorySnapshots.stream().mapToLong(Long::longValue).average().orElse(0.0);
        }
    }
    
    public double getAverageCpuUsage() {
        synchronized (this) {
            return cpuSnapshots.stream().mapToDouble(Double::doubleValue).average().orElse(0.0);
        }
    }
}