/*
 *
 *    Copyright (c) 2021 Project CHIP Authors
 *
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *
 *        http://www.apache.org/licenses/LICENSE-2.0
 *
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 */

#include <lib/shell/Engine.h>
#include <lib/shell/streamer.h>

#include "driver/uart.h"
#include "esp_console.h"
#include "esp_vfs_dev.h"
#include "linenoise/linenoise.h"
#include <fcntl.h>
#include <lib/core/CHIPError.h>
#include <stdio.h>
#include <string.h>

namespace chip {
namespace Shell {

static int chip_command_handler(int argc, char ** argv)
{
    CHIP_ERROR err;
    if (argc > 0)
    {
        err = Engine::Root().ExecCommand(argc - 1, argv + 1);
    }
    else
    {
        err = CHIP_ERROR_INVALID_ARGUMENT;
    }
    return static_cast<int>(err.AsInteger());
}

int streamer_esp32_init(streamer_t * streamer)
{
    fflush(stdout);
    fsync(fileno(stdout));
    setvbuf(stdin, NULL, _IONBF, 0);
    esp_vfs_dev_uart_port_set_rx_line_endings(CONFIG_ESP_CONSOLE_UART_NUM, ESP_LINE_ENDINGS_CR);
    esp_vfs_dev_uart_port_set_tx_line_endings(CONFIG_ESP_CONSOLE_UART_NUM, ESP_LINE_ENDINGS_CRLF);
    if (!uart_is_driver_installed(CONFIG_ESP_CONSOLE_UART_NUM))
    {
        ESP_ERROR_CHECK(uart_driver_install(CONFIG_ESP_CONSOLE_UART_NUM, 256, 0, 0, NULL, 0));
    }
    uart_config_t uart_config = {
        .baud_rate           = 115200,
        .data_bits           = UART_DATA_8_BITS,
        .parity              = UART_PARITY_DISABLE,
        .stop_bits           = UART_STOP_BITS_1,
        .flow_ctrl           = UART_HW_FLOWCTRL_DISABLE,
        .rx_flow_ctrl_thresh = 0,
        .source_clk          = UART_SCLK_APB,
    };
    ESP_ERROR_CHECK(uart_param_config(CONFIG_ESP_CONSOLE_UART_NUM, &uart_config));
    esp_vfs_dev_uart_use_driver(0);
    esp_console_config_t console_config = {
        .max_cmdline_length = 256,
        .max_cmdline_args   = 32,
    };
    ESP_ERROR_CHECK(esp_console_init(&console_config));
    linenoiseSetMultiLine(1);
    linenoiseHistorySetMaxLen(100);

    if (linenoiseProbe())
    {
        // Set if terminal does not recognize escape sequences.
        linenoiseSetDumbMode(1);
    }

    esp_console_cmd_t command = { .command = "matter", .help = "Matter utilities", .func = chip_command_handler };
    ESP_ERROR_CHECK(esp_console_cmd_register(&command));
    ESP_ERROR_CHECK(esp_console_register_help_command());
    return 0;
}

ssize_t streamer_esp32_read(streamer_t * streamer, char * buf, size_t len)
{
    return 0;
}

ssize_t streamer_esp32_write(streamer_t * streamer, const char * buf, size_t len)
{
    return uart_write_bytes(CONFIG_ESP_CONSOLE_UART_NUM, buf, len);
}

static streamer_t streamer_stdio = {
    .init_cb  = streamer_esp32_init,
    .read_cb  = streamer_esp32_read,
    .write_cb = streamer_esp32_write,
};

streamer_t * streamer_get()
{
    return &streamer_stdio;
}

} // namespace Shell
} // namespace chip