/**
 * @file example.c
 * @brief 数据路由库使用示例
 *
 * 展示：
 *   1. 编译期声明报文类型 → 自动生成发送触发函数和接收回调声明
 *   2. 创建端口、设置报文类型
 *   3. 为一个端口注册多个外设 handler（一对多广播路由）
 *   4. 运行时增删 handler，切换路由
 *   5. 实现接收回调处理外设收到的数据
 */

#include "datarouter.h"
#include <stdio.h>
#include <string.h>

/* ---- 外设发送 handler 实现 ---- */

static void uart_send(uint32_t port_id, const void *data, size_t len)
{
    printf("[UART] port %u: %.*s\n", port_id, (int)len, (const char *)data);
}

static void tcp_send(uint32_t port_id, const void *data, size_t len)
{
    printf("[TCP]  port %u: %.*s\n", port_id, (int)len, (const char *)data);
}

static void file_send(uint32_t port_id, const void *data, size_t len)
{
    printf("[FILE] port %u: %.*s\n", port_id, (int)len, (const char *)data);
}

static void can_send(uint32_t port_id, const void *data, size_t len)
{
    printf("[CAN]  port %u: %.*s\n", port_id, (int)len, (const char *)data);
}

/* ---- 接收回调实现 ---- */

void datarouter_on_recv_sensor(uint32_t port_id, const void *data, size_t len)
{
    printf("[RX:sensor] port %u: %.*s\n", port_id, (int)len, (const char *)data);
}

void datarouter_on_recv_status(uint32_t port_id, const void *data, size_t len)
{
    printf("[RX:status] port %u: %.*s\n", port_id, (int)len, (const char *)data);
}

/* ---- main ---- */

int main(void)
{
    datarouter_init();

    printf("Channels:\n");
    for (int i = 0; i < datarouter_channel_count(); i++)
        printf("  [%d] %s - %s\n", i,
               datarouter_channel_name(i),
               datarouter_channel_desc(i));

    /*
     * 创建一个 sensor 端口，注册多个 handler。
     * 一次 send_sensor() 调用同时路由到 UART + TCP + CAN。
     */
    datarouter_port_t sensor_port = datarouter_port_create();
    datarouter_port_set_type(sensor_port, DATAROUTER_CHANNEL_sensor);
    datarouter_port_add_handler(sensor_port, uart_send);
    datarouter_port_add_handler(sensor_port, tcp_send);
    datarouter_port_add_handler(sensor_port, can_send);

    printf("\n--- send sensor (UART + TCP + CAN) ---\n");
    datarouter_send_sensor(sensor_port, "temperature:25.3", 16);

    /*
     * 运行时移除 TCP handler，只剩 UART + CAN。
     */
    printf("\n--- remove TCP, keep UART + CAN ---\n");
    datarouter_port_remove_handler(sensor_port, tcp_send);
    datarouter_send_sensor(sensor_port, "temperature:26.1", 16);

    /*
     * 运行时再添加 FILE handler。
     */
    printf("\n--- add FILE back, now UART + CAN + FILE ---\n");
    datarouter_port_add_handler(sensor_port, file_send);
    datarouter_send_sensor(sensor_port, "temperature:27.0", 16);

    /*
     * 清除所有 handler，不再输出到任何外设。
     */
    printf("\n--- clear all handlers, nothing sent ---\n");
    datarouter_port_clear_handlers(sensor_port);
    int ret = datarouter_send_sensor(sensor_port, "lost", 4);
    printf("send_sensor after clear returned %d\n", ret);

    /* ---- 接收 ---- */
    printf("\n--- simulate peripheral receive ---\n");
    datarouter_on_recv_sensor(0, "temperature:24.8", 16);
    datarouter_on_recv_status(1, "status:ERROR", 12);

    datarouter_port_delete(sensor_port);
    return 0;
}