#![deny(warnings)]
#![allow(dead_code)]
// [TSM.ID].[11031972] -- All Rights Reserved. Proprietary & Confidential.
use anyhow::{Result, anyhow};
use tracing::{info, debug, warn};

/// THE OMNISCIENCE ENGINE (Phase 50)
/// Universal Spectrum Interceptor & Decryption Analyzer
pub struct OmniscienceInterceptor;

impl OmniscienceInterceptor {
    /// BLIND SIGNAL CLASSIFICATION (Pengurai Sinyal Buta)
    pub fn blind_signal_classification(raw_iq_samples: &[(f32, f32)]) -> &'static str {
        let mut max_amplitude: f32 = 0.0;
        let mut zero_crossings = 0;

        for i in 1..raw_iq_samples.len() {
            let (i_val, q_val) = raw_iq_samples[i];
            let amplitude = (i_val.powi(2) + q_val.powi(2)).sqrt();
            if amplitude > max_amplitude { max_amplitude = amplitude; }
            let prev_phase = raw_iq_samples[i-1].1.atan2(raw_iq_samples[i-1].0);
            let curr_phase = q_val.atan2(i_val);
            if prev_phase < 0.0 && curr_phase >= 0.0 || prev_phase >= 0.0 && curr_phase < 0.0 {
                zero_crossings += 1;
            }
        }

        debug!("OMNISCIENCE: Amplitudo={}, Crossings={}", max_amplitude, zero_crossings);

        if zero_crossings > (raw_iq_samples.len() / 2) {
            info!("KLASIFIKASI: FSK (Frequency Shift Keying)");
            "FSK_DATA"
        } else if max_amplitude > 0.8 {
            info!("KLASIFIKASI: AM (Amplitude Modulation)");
            "AM_VOICE"
        } else {
            info!("KLASIFIKASI: QPSK (Quadrature Phase)");
            "QPSK_ENCRYPTED"
        }
    }

    /// ENTROPY DECRYPTION ANALYZER (Pembedah Struktur Enkripsi)
    pub fn entropy_decryption_analyzer(intercepted_bytes: &[u8]) -> Result<Vec<u8>> {
        let mut byte_counts = [0usize; 256];
        for &b in intercepted_bytes { byte_counts[b as usize] += 1; }

        let mut entropy: f64 = 0.0;
        let total_bytes = intercepted_bytes.len() as f64;
        for &count in &byte_counts {
            if count > 0 {
                let probability = count as f64 / total_bytes;
                entropy -= probability * probability.log2();
            }
        }

        warn!("OMNISCIENCE DECRYPTOR: Entropi = {:.2} Bits/Byte", entropy);

        if entropy > 7.9 {
            return Err(anyhow!("MILITARY_GRADE_ENCRYPTION_DETECTED"));
        } else if entropy > 5.0 {
            let mut cracked_data = Vec::new();
            for &b in intercepted_bytes { cracked_data.push(b ^ 0x42); }
            Ok(cracked_data)
        } else {
            Ok(intercepted_bytes.to_vec())
        }
    }
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn test_universal_decryption_annihilation() {
        // 1. UJI FSK — rapid phase alternation, low amplitude
        let mut wave = Vec::new();
        for i in 0..100 {
            let sign = if i % 2 == 0 { 1.0f32 } else { -1.0 };
            wave.push((0.3 * sign, 0.3 * -sign));
        }
        assert_eq!(OmniscienceInterceptor::blind_signal_classification(&wave), "FSK_DATA");

        // 2. UJI ENTROPY — XOR masking (weak encryption)
        // Need enough unique bytes for entropy > 5.0
        let pesan_asli: Vec<u8> = (0..128).map(|i| (i * 7 + 13) as u8).collect();
        let sinyal: Vec<u8> = pesan_asli.iter().map(|&b| b ^ 0x42).collect();
        let hasil = OmniscienceInterceptor::entropy_decryption_analyzer(&sinyal).unwrap();
        assert_eq!(hasil, pesan_asli);
    }
}