#pragma once

#include <Print.h>

#include <cstddef>
#include <cstdint>

namespace roro {

// Where the firmware's console output goes: the USB serial port, and in a Debug Build also a ring
// buffer the Debug Console sends over Wi-Fi (with what came before the connection, so boot messages
// aren't lost). Use `console` instead of Serial for anything a human should be able to read remotely.
class Console : public Print {
   public:
    size_t write(uint8_t c) override { return write(&c, 1); }
    size_t write(const uint8_t* data, size_t len) override;
    using Print::write;

#ifdef RORO_DEBUG
    static constexpr size_t kRingBytes = 4096;

    // Also copies ESP-IDF's own log lines into the ring (they still reach the serial port).
    void captureEspLogs();
    // Copies bytes written since `pos` into `out`, and advances `pos`. A reader that fell more than
    // the ring behind gets the oldest bytes still there, and `skipped` says how many it missed.
    size_t readSince(uint32_t& pos, uint8_t* out, size_t max, uint32_t& skipped);
    // The position of the oldest byte still in the ring: a new reader starts there.
    uint32_t oldest() const;
    // The ring only, for output that already reaches the serial port another way.
    void toRing(const uint8_t* data, size_t len);

   private:
    uint8_t ring_[kRingBytes];
    uint32_t head_ = 0;  // total bytes ever written; the ring holds the last kRingBytes of them
#endif
};

extern Console console;

}  // namespace roro