#include "k10_audio_codec.h"

#include <esp_log.h>
#include <driver/i2c_master.h>
#include <driver/i2s_tdm.h>
#include <cmath>

static const char TAG[] = "K10AudioCodec";

K10AudioCodec::K10AudioCodec(void* i2c_master_handle, int input_sample_rate, int output_sample_rate,
    gpio_num_t mclk, gpio_num_t bclk, gpio_num_t ws, gpio_num_t dout, gpio_num_t din,
    gpio_num_t pa_pin, uint8_t es8311_addr, uint8_t es7210_addr, bool input_reference) {
    duplex_ = true; // 是否双工
    input_reference_ = input_reference; // 是否使用参考输入，实现回声消除
    input_channels_ = input_reference_ ? 2 : 1; // 输入通道数
    input_sample_rate_ = input_sample_rate;
    output_sample_rate_ = output_sample_rate;

    CreateDuplexChannels(mclk, bclk, ws, dout, din);

    // Do initialize of related interface: data_if, ctrl_if and gpio_if
    audio_codec_i2s_cfg_t i2s_cfg = {
        .port = I2S_NUM_0,
        .rx_handle = rx_handle_,
        .tx_handle = tx_handle_,
    };
    data_if_ = audio_codec_new_i2s_data(&i2s_cfg);
    assert(data_if_ != NULL);

    audio_codec_i2c_cfg_t i2c_cfg = {
        .port = I2C_NUM_1,
        .addr = es7210_addr,
        .bus_handle = i2c_master_handle,
    };
    const audio_codec_ctrl_if_t *in_ctrl_if_ = audio_codec_new_i2c_ctrl(&i2c_cfg);
    assert(in_ctrl_if_ != NULL);

    es7243e_codec_cfg_t es7243e_cfg = {
        .ctrl_if = in_ctrl_if_,
    };
    const audio_codec_if_t *in_codec_if_ = es7243e_codec_new(&es7243e_cfg);
    assert(in_codec_if_ != NULL);

    esp_codec_dev_cfg_t codec_es7243e_dev_cfg = {
        .dev_type = ESP_CODEC_DEV_TYPE_IN,
        .codec_if = in_codec_if_,
        .data_if = data_if_,
    };
    input_dev_ = esp_codec_dev_new(&codec_es7243e_dev_cfg);

    assert(input_dev_ != NULL);

    ESP_LOGI(TAG, "DF-K10 AudioDevice initialized");
}

K10AudioCodec::~K10AudioCodec() {
    ESP_ERROR_CHECK(esp_codec_dev_close(output_dev_));
    esp_codec_dev_delete(output_dev_);
    ESP_ERROR_CHECK(esp_codec_dev_close(input_dev_));
    esp_codec_dev_delete(input_dev_);

    audio_codec_delete_codec_if(in_codec_if_);
    audio_codec_delete_ctrl_if(in_ctrl_if_);
    audio_codec_delete_codec_if(out_codec_if_);
    audio_codec_delete_ctrl_if(out_ctrl_if_);
    audio_codec_delete_gpio_if(gpio_if_);
    audio_codec_delete_data_if(data_if_);
}

void K10AudioCodec::CreateDuplexChannels(gpio_num_t mclk, gpio_num_t bclk, gpio_num_t ws, gpio_num_t dout, gpio_num_t din) {
    assert(input_sample_rate_ == output_sample_rate_);

    i2s_chan_config_t chan_cfg = {
        .id = I2S_NUM_0,
        .role = I2S_ROLE_MASTER,
        .dma_desc_num = AUDIO_CODEC_DMA_DESC_NUM,
        .dma_frame_num = AUDIO_CODEC_DMA_FRAME_NUM,
        .auto_clear_after_cb = true,
        .auto_clear_before_cb = false,
        .intr_priority = 0,
    };
    ESP_ERROR_CHECK(i2s_new_channel(&chan_cfg, &tx_handle_, &rx_handle_));

    i2s_std_config_t std_cfg = {
        .clk_cfg = {
            .sample_rate_hz = (uint32_t)output_sample_rate_,
            .clk_src = I2S_CLK_SRC_DEFAULT,
            .ext_clk_freq_hz = 0,
            .mclk_multiple = I2S_MCLK_MULTIPLE_256
        },
        .slot_cfg = {
            .data_bit_width = I2S_DATA_BIT_WIDTH_16BIT,
            .slot_bit_width = I2S_SLOT_BIT_WIDTH_AUTO,
            .slot_mode = I2S_SLOT_MODE_MONO,
            .slot_mask = I2S_STD_SLOT_BOTH,
            .ws_width = I2S_DATA_BIT_WIDTH_16BIT,
            .ws_pol = false,
            .bit_shift = true,
            .left_align = true,
            .big_endian = false,
            .bit_order_lsb = false
        },
        .gpio_cfg = {
            // .mclk = mclk,
            .bclk = bclk,
            .ws = ws,
            .dout = dout,
            .din = I2S_GPIO_UNUSED,
            .invert_flags = {
                .mclk_inv = false,
                .bclk_inv = false,
                .ws_inv = false
            }
        }
    };

    i2s_tdm_config_t tdm_cfg = {
        .clk_cfg = {
            .sample_rate_hz = (uint32_t)input_sample_rate_,
            .clk_src = I2S_CLK_SRC_DEFAULT,
            .ext_clk_freq_hz = 0,
            .mclk_multiple = I2S_MCLK_MULTIPLE_256,
            .bclk_div = 8,
        },
        .slot_cfg = {
            .data_bit_width = I2S_DATA_BIT_WIDTH_16BIT,
            .slot_bit_width = I2S_SLOT_BIT_WIDTH_AUTO,
            .slot_mode = I2S_SLOT_MODE_STEREO,
            .slot_mask = i2s_tdm_slot_mask_t(I2S_TDM_SLOT0 | I2S_TDM_SLOT1 | I2S_TDM_SLOT2 | I2S_TDM_SLOT3),
            .ws_width = I2S_TDM_AUTO_WS_WIDTH,
            .ws_pol = false,
            .bit_shift = true,
            .left_align = false,
            .big_endian = false,
            .bit_order_lsb = false,
            .skip_mask = false,
            .total_slot = I2S_TDM_AUTO_SLOT_NUM
        },
        .gpio_cfg = {
            .mclk = mclk,
            .bclk = bclk,
            .ws = ws,
            .dout = I2S_GPIO_UNUSED,
            .din = din,
            .invert_flags = {
                .mclk_inv = false,
                .bclk_inv = false,
                .ws_inv = false
            }
        }
    };

    ESP_ERROR_CHECK(i2s_channel_init_std_mode(tx_handle_, &std_cfg));
    ESP_ERROR_CHECK(i2s_channel_init_tdm_mode(rx_handle_, &tdm_cfg));
    ESP_ERROR_CHECK(i2s_channel_enable(tx_handle_));
    ESP_ERROR_CHECK(i2s_channel_enable(rx_handle_));
    ESP_LOGI(TAG, "Duplex channels created");
}

void K10AudioCodec::SetOutputVolume(int volume) {
    AudioCodec::SetOutputVolume(volume);
}

void K10AudioCodec::EnableInput(bool enable) {
    if (enable == input_enabled_) {
        return;
    }
    if (enable) {
        esp_codec_dev_sample_info_t fs = {
            .bits_per_sample = 16,
            .channel = 4,
            .channel_mask = ESP_CODEC_DEV_MAKE_CHANNEL_MASK(0),
            .sample_rate = (uint32_t)output_sample_rate_,
            .mclk_multiple = 0,
        };
        if (input_reference_) {
            fs.channel_mask |= ESP_CODEC_DEV_MAKE_CHANNEL_MASK(1);
        }
        ESP_ERROR_CHECK(esp_codec_dev_open(input_dev_, &fs));
        ESP_ERROR_CHECK(esp_codec_dev_set_in_gain(input_dev_, 37.5)); //麦克风增益解决收音太小的问题
    } else {
        ESP_ERROR_CHECK(esp_codec_dev_close(input_dev_));
    }
    AudioCodec::EnableInput(enable);
}

void K10AudioCodec::EnableOutput(bool enable) {
    if (enable == output_enabled_) {
        return;
    }
    AudioCodec::SetOutputVolume(output_volume_);
    AudioCodec::EnableOutput(enable);
}

int K10AudioCodec::Read(int16_t* dest, int samples) {
    if (input_enabled_) {
        ESP_ERROR_CHECK_WITHOUT_ABORT(esp_codec_dev_read(input_dev_, (void*)dest, samples * sizeof(int16_t)));
    }
    return samples;
}

int K10AudioCodec::Write(const int16_t* data, int samples) {
    if (output_enabled_) {
        std::vector<int32_t> buffer(samples * 2);  // Allocate buffer for 2x samples

        // Apply volume adjustment (same as before)
        int32_t volume_factor = pow(double(output_volume_) / 100.0, 2) * 65536;
        for (int i = 0; i < samples; i++) {
            int64_t temp = int64_t(data[i]) * volume_factor;
            if (temp > INT32_MAX) {
            buffer[i * 2] = INT32_MAX;
            } else if (temp < INT32_MIN) {
            buffer[i * 2] = INT32_MIN;
            } else {
            buffer[i * 2] = static_cast<int32_t>(temp);
            }

            // Repeat each sample for slow playback (assuming mono audio)
            buffer[i * 2 + 1] = buffer[i * 2];
        }

        size_t bytes_written;
        ESP_ERROR_CHECK(i2s_channel_write(tx_handle_, buffer.data(), samples * 2 * sizeof(int32_t), &bytes_written, portMAX_DELAY));
        return bytes_written / sizeof(int32_t);
    }
    return samples;
}
