/**
 * @file    main.c
 * @brief   PC 模拟测试入口
 *
 * 在 PC 上编译运行，模拟按键事件驱动 LED 状态机
 *
 * 编译命令:
 *   gcc -I inc -DAPP_DEBUG_LOG \
 *       src/main.c src/hal_mock.c src/led_driver.c src/btn_fsm.c src/app_controller.c \
 *       -o smart_led_test && ./smart_led_test
 *
 * 交互命令:
 *   p  → 模拟按下按键 (press)
 *   r  → 模拟释放按键 (release)
 *   q  → 退出
 *
 * 测试场景:
 *   1. 短按一次（p → 等 100ms → r）        → 单击: OFF → ON
 *   2. 快速按两次（p r p r，间隔 < 300ms）  → 双击: ON → BLINK_SLOW
 *   3. 长按 1 秒以上（p → 等 1.2s → r）     → 长按: 任意 → BREATHING
 */

#ifndef APP_DEBUG_LOG
#define APP_DEBUG_LOG
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "hal_gpio.h"
#include "led_driver.h"
#include "btn_fsm.h"
#include "app_controller.h"

/* hal_mock.c 中的模拟接口 */
extern void mock_set_button(uint8_t pressed);

/* ======== 按键 HAL 适配层 ======== */
static uint8_t btn_read_pin(uint8_t button_id) {
    (void)button_id;
    return HAL_GPIO_ReadPin(GPIO_PORT_A, GPIO_PIN_0);
}

/* ======== 主程序 ======== */
int main(void) {
    printf("╔══════════════════════════════════════════╗\n");
    printf("║  Smart LED Demo — OOPC + FSM 实例工程   ║\n");
    printf("║                                          ║\n");
    printf("║  p = 按下按键    r = 释放按键            ║\n");
    printf("║  q = 退出                                ║\n");
    printf("║                                          ║\n");
    printf("║  操作指南:                               ║\n");
    printf("║  单击: p → 等50ms → r                    ║\n");
    printf("║  双击: p r p r (快速)                    ║\n");
    printf("║  长按: p → 等1.2s → r                    ║\n");
    printf("╚══════════════════════════════════════════╝\n\n");

    /* ---- 1. 创建 LED 驱动（不透明指针） ---- */
    LedDriver_S* led = Led_Create(GPIO_PORT_B, GPIO_PIN_0, 1 /* active_low */);
    if (led == NULL) {
        printf("[ERROR] Led_Create failed\n");
        return 1;
    }
    printf("[MAIN] LED driver created (opaque pointer)\n");

    /* ---- 2. 初始化按键 FSM（开放结构体） ---- */
    static Btn_FSM btn;  /* 静态分配 */
    Btn_Init(&btn, btn_read_pin, 0 /* button_id */, 0 /* active_low */);
    Btn_Start(&btn);
    printf("[MAIN] Button FSM initialized (open struct)\n");

    /* ---- 3. 创建应用控制器（HSM） ---- */
    AppCtrl_S* app = AppCtrl_Create(led, &btn);
    if (app == NULL) {
        printf("[ERROR] AppCtrl_Create failed\n");
        return 1;
    }
    AppCtrl_Init(app);
    printf("[MAIN] App controller created (HSM)\n");
    printf("[MAIN] Initial state: %s\n\n", AppCtrl_StateName(AppCtrl_GetState(app)));

    /* ---- 4. 主循环: 模拟按键输入 ---- */
    char cmd[16];
    uint32_t tick_count = 0;

    while (1) {
        printf("[STATE=%s] 输入命令 (p/r/q): ", AppCtrl_StateName(AppCtrl_GetState(app)));

        if (fgets(cmd, sizeof(cmd), stdin) == NULL) break;

        switch (cmd[0]) {
        case 'p':
        case 'P':
            mock_set_button(1);  /* 按下 */
            printf("       >>> 按键按下 <<<\n");
            break;

        case 'r':
        case 'R':
            mock_set_button(0);  /* 释放 */
            printf("       >>> 按键释放 <<<\n");
            break;

        case 'q':
        case 'Q':
            goto cleanup;

        default:
            printf("       未知命令: %c\n", cmd[0]);
            continue;
        }

        /* 每次输入后执行若干 Tick（模拟 5ms 定时器 × 多次） */
        for (int i = 0; i < 20; i++) {
            Btn_Tick();
            AppCtrl_Poll(app, tick_count * 5);
            tick_count++;
        }

        printf("       LED brightness: %d%%\n\n", Led_GetBrightness(led));
    }

cleanup:
    printf("\n[MAIN] Cleanup...\n");
    Btn_Stop(&btn);
    AppCtrl_Destroy(app);
    Led_Destroy(led);
    printf("[MAIN] Done.\n");
    return 0;
}