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//
// Created by spak on 3/25/21.
//

#ifndef PN532_ESP32_SPI_HPP
#define PN532_ESP32_SPI_HPP

#include <driver/gpio.h>
#include <driver/spi_master.h>
#include <optional>
#include <pn532/channel.hpp>
#include <pn532/esp32/capable_mem.hpp>
#include <pn532/esp32/irq_assert.hpp>

namespace pn532::esp32 {

    using capable_buffer = std::vector<std::uint8_t, capable_allocator<std::uint8_t>>;

    enum struct spi_command : std::uint8_t {
        data_write = 0b01,
        status_read = 0b10,
        data_read = 0b11,
        none
    };

    class spi_channel final : public channel {
        capable_buffer _dma_buffer;

        std::optional<spi_host_device_t> _host;
        spi_device_handle_t _device;
        irq_assert _irq_assert;

        enum struct recv_op_status {
            init,
            did_poll,
            data_read
        };
        recv_op_status _recv_op_status;

        result<> perform_transaction(capable_buffer &buffer, spi_command cmd, comm_dir mode, ms timeout);

    protected:
        result<> raw_send(mlab::range<bin_data::const_iterator> buffer, ms timeout) override;

        result<> raw_receive(mlab::range<bin_data::iterator> buffer, ms timeout) override;

        result<> raw_poll_status(ms timeout);

        bool on_receive_prepare(ms timeout) override;

        void on_receive_complete(result<> const &) override;

        [[nodiscard]] comm_rx_mode raw_receive_mode() const override;

    public:
        bool wake() override;

        spi_channel(spi_host_device_t host, spi_bus_config_t const &bus_config, spi_device_interface_config_t device_cfg, spi_dma_chan_t dma_chan);

        spi_channel(spi_host_device_t host, spi_bus_config_t const &bus_config, spi_device_interface_config_t device_cfg, int dma_chan,
                    gpio_num_t response_irq_line, bool manage_isr_service);

        ~spi_channel() override;
    };

}// namespace pn532::esp32

#endif//PN532_ESP32_SPI_HPP