#include "param_map.h"
#include <algorithm>
#include <chrono>
#include <cmath>
#include <cstring>

static inline uint8_t FloatToU8(float v) {
    v = std::clamp(v, 0.0f, 1.0f);
    return static_cast<uint8_t>(std::lround(v * 255.0f));
}

static inline int64_t NowNs() {
    return std::chrono::duration_cast<std::chrono::nanoseconds>(
        std::chrono::steady_clock::now().time_since_epoch()).count();
}

void ParamMap::SetChannel(int led, int channel, float value01) {
    if (led < 0 || led >= 10) return;
    if (channel < 0 || channel >= 3) return;
    m_rgb[led * 3 + channel].store(FloatToU8(value01), std::memory_order_relaxed);
}

void ParamMap::SetBrightness(float value01) {
    m_bri.store(FloatToU8(value01), std::memory_order_relaxed);
}

void ParamMap::SnapshotFrame(std::array<uint8_t, 30>& dst) const {
    for (int i = 0; i < 30; ++i) {
        dst[i] = m_rgb[i].load(std::memory_order_relaxed);
    }
}

uint8_t ParamMap::SnapshotBri() const {
    return m_bri.load(std::memory_order_relaxed);
}

void ParamMap::MarkOscArrived() {
    m_lastOscNs.store(NowNs(), std::memory_order_relaxed);
}

int64_t ParamMap::NsSinceLastOsc() const {
    const int64_t last = m_lastOscNs.load(std::memory_order_relaxed);
    if (last == 0) return 0;  // zero means "never received" — treat as fresh
    return NowNs() - last;
}