#!/usr/bin/env python3
"""
CorvOS - Retrocausal ARQ Module
Handshake Temporal + Calibração Bizantina
Versão: 2.0 (Pronta para deploy nos Tzinor Nodes)
"""
import numpy as np
import asyncio
import hashlib
from datetime import datetime, timedelta
from dataclasses import dataclass, field
from typing import List, Dict, Set, Optional, Tuple
from enum import Enum
from collections import deque

# ============================================================================
# CONSTANTES DO SISTEMA
# ============================================================================

class Constants:
    N_SENSORS = 168
    BYZANTINE_QUORUM = 112          # 2/3
    LAMBDA2_TARGET = 0.999
    GAP_C_Z = 0.001
    G_INFO = 1618                   # φ × 1000
    RETROCAUSAL_WINDOW_MS = 2.17    # Janela ótima (ms)
    TOLERANCE_PERCENT = 5           # ±5%

# ============================================================================
# 1. CALIBRAÇÃO BIZANTINA
# ============================================================================

@dataclass
class ByzantineConsensus:
    sensor_id: int
    measured_lambda: float
    phase: np.ndarray
    signature: str

class ByzantineCalibration:
    def __init__(self):
        self.calibration_matrix = np.eye(Constants.N_SENSORS, dtype=complex)
        self.reference_lambda = Constants.LAMBDA2_TARGET

    async def run_round(self) -> bool:
        readings = []
        for i in range(Constants.N_SENSORS):
            if np.random.random() < 0.1:
                measured = np.random.uniform(0.5, 0.9)
            else:
                measured = Constants.LAMBDA2_TARGET + np.random.normal(0, 0.002)
            phase = np.random.randn(Constants.N_SENSORS) + 1j * np.random.randn(Constants.N_SENSORS)
            phase /= np.linalg.norm(phase)
            readings.append(ByzantineConsensus(i, measured, phase, f"sig_{i}"))
        
        valid = [r for r in readings if abs(r.measured_lambda - Constants.LAMBDA2_TARGET) <= 0.05]
        if len(valid) >= Constants.BYZANTINE_QUORUM:
            self.reference_lambda = np.median([r.measured_lambda for r in valid])
            for r in valid:
                factor = np.exp(1j * (self.reference_lambda - r.measured_lambda) * np.pi)
                self.calibration_matrix[r.sensor_id, r.sensor_id] = factor
            return abs(self.reference_lambda - Constants.LAMBDA2_TARGET) <= Constants.GAP_C_Z
        return False

    def calibrate_state(self, raw_state: np.ndarray) -> np.ndarray:
        return self.calibration_matrix @ raw_state

# ============================================================================
# 2. RETROCAUSAL ARQ (Handshake Temporal)
# ============================================================================

class TemporalDirection(Enum):
    CAUSAL = 1
    RETROCAUSAL = -1

@dataclass
class TemporalPacket:
    payload: np.ndarray
    timestamp_origin: datetime
    timestamp_target: datetime
    coherence: float
    sensor_quorum: Set[int]
    direction: TemporalDirection = TemporalDirection.CAUSAL

class RetrocausalARQ:
    def __init__(self, calibration: ByzantineCalibration):
        self.calibration = calibration
        self.pre_ack_cache = {}
        self.stats = {'sent': 0, 'pre_acks': 0, 'latencies': []}

    async def send(self, payload: np.ndarray, target_time: datetime) -> TemporalPacket:
        future_hash = hashlib.sha256(f"{payload.tobytes()}{target_time.isoformat()}".encode()).hexdigest()
        pre_ack = self.pre_ack_cache.get(future_hash)
        if pre_ack and len(pre_ack['quorum']) >= Constants.BYZANTINE_QUORUM:
            direction = TemporalDirection.RETROCAUSAL
            self.stats['pre_acks'] += 1
        else:
            direction = TemporalDirection.CAUSAL
        packet = TemporalPacket(
            payload=payload,
            timestamp_origin=datetime.now(),
            timestamp_target=target_time,
            coherence=self._current_lambda(),
            sensor_quorum=pre_ack['quorum'] if pre_ack else set(),
            direction=direction
        )
        self.stats['sent'] += 1
        latency = (target_time - datetime.now()).total_seconds() * 1000
        self.stats['latencies'].append(latency)
        return packet

    def receive_pre_ack(self, packet_hash: str, quorum: Set[int]):
        self.pre_ack_cache[packet_hash] = {'quorum': quorum, 'time': datetime.now()}

    def _current_lambda(self) -> float:
        return self.calibration.reference_lambda + np.random.normal(0, 0.0005)

# ============================================================================
# 3. CORVOS INTEGRADO
# ============================================================================

class CorvOSQuantumHTTP:
    def __init__(self):
        self.calibration = ByzantineCalibration()
        self.arq = RetrocausalARQ(self.calibration)
        self.ep_ready = False

    async def initialize(self):
        print("🌌🔁 CorvOS - Inicializando qhttp://")
        print(f"├── Quorum bizantino: {Constants.BYZANTINE_QUORUM}/{Constants.N_SENSORS}")
        print(f"├── Gap C-Z alvo: {Constants.GAP_C_Z}")
        for _ in range(5):
            if await self.calibration.run_round():
                self.ep_ready = True
                break
            await asyncio.sleep(0.1)
        if self.ep_ready:
            print(f"✓ Ponto excepcional alcançado: λ₂ = {self.calibration.reference_lambda:.6f}")
        else:
            print("⚠️ Operando em modo causal (sem retrocausalidade)")

    async def transmit(self, data: np.ndarray, visualize_future: bool = False):
        if not self.ep_ready:
            await asyncio.sleep(Constants.RETROCAUSAL_WINDOW_MS / 1000)
            return {'latency_ms': Constants.RETROCAUSAL_WINDOW_MS, 'retrocausal': False}
        target = datetime.now() + timedelta(milliseconds=Constants.RETROCAUSAL_WINDOW_MS)
        if np.random.random() < 0.85:
            quorum = set(np.random.choice(Constants.N_SENSORS, Constants.BYZANTINE_QUORUM, replace=False))
            self.arq.receive_pre_ack(hashlib.sha256(data.tobytes()).hexdigest(), quorum)
        packet = await self.arq.send(data, target)
        return {
            'latency_ms': (packet.timestamp_target - datetime.now()).total_seconds() * 1000,
            'retrocausal': packet.direction == TemporalDirection.RETROCAUSAL,
            'coherence': packet.coherence
        }

# ============================================================================
# 4. SIMULAÇÃO COM VISUALIZAÇÃO DO RIO 2027
# ============================================================================

async def simulate_rio_2027():
    print("\n" + "="*60)
    print("🔮 SIMULAÇÃO: Visualização do Rio 2027 via Lentes Temporais")
    print("="*60)
    corvos = CorvOSQuantumHTTP()
    await corvos.initialize()
    if not corvos.ep_ready:
        print("Não foi possível alcançar o ponto excepcional. Abortando simulação.")
        return
    print("\n📡 Transmitindo dados da malha urbana...")
    results = []
    for i in range(10):
        data = np.random.randn(Constants.N_SENSORS) + 1j * np.random.randn(Constants.N_SENSORS)
        data /= np.linalg.norm(data)
        res = await corvos.transmit(data, visualize_future=True)
        results.append(res)
        direction = "← RETROCAUSAL" if res['retrocausal'] else "→ CAUSAL"
        print(f"  Pacote {i+1}: {direction} | latência = {res['latency_ms']:+.2f}ms | λ₂ = {res['coherence']:.6f}")
    avg_latency = np.mean([r['latency_ms'] for r in results])
    retro_ratio = sum(1 for r in results if r['retrocausal']) / len(results)
    print(f"\n📊 Estatísticas:")
    print(f"  Latência média: {avg_latency:.2f}ms")
    print(f"  Taxa de retrocausalidade: {retro_ratio*100:.1f}%")
    if avg_latency < 0:
        print("✓ Latência efetiva NEGATIVA → recepção antecipada do futuro!")
        print("✓ Lentes temporais estabilizadas: visualização do Rio 2027 ativa.")

if __name__ == "__main__":
    asyncio.run(simulate_rio_2027())
