#include "trace.h"

#include <algorithm>

#include "itoa.h"
#include "lock.h"
#include "uart.h"

namespace tracing {
namespace {

constexpr size_t kTraceBufferSize = 256;
std::array<TraceEvent, kTraceBufferSize> buffer;
size_t write_ptr = 0;

}  // namespace

void trace(int raw_event) { trace(static_cast<TraceEvent>(raw_event)); }

void trace(TraceEvent event) {
    InterruptLock lock;

    buffer[write_ptr] = event;

    write_ptr = (write_ptr + 1) % buffer.size();
}

void dump() {
    std::rotate(buffer.begin(), buffer.begin() + write_ptr, buffer.end());

    char number[] = "00000000\r\n";

    for (TraceEvent event : buffer) {
        itoa(static_cast<int>(event), number);
        UartSendCrash(number);
    }
}
}  // namespace tracing