/**
  ******************************************************************************
  * @file    relay_control.c
  * @brief   继电器控制模块实现
  * @author  Application Layer
  * @version 1.1
  ******************************************************************************
  * @attention
  * 本模块实现继电器的安全控制
  * 关键特性：
  * 1. 最小切换间隔保护，防止频繁切换损坏继电器
  * 2. 状态记录，支持诊断
  * 3. 调试日志输出
  * 
  * 修订历史：
  * v1.1 - 修复审查报告中危-9/10：对齐RELAY_COUNT与参数校验逻辑
  ******************************************************************************
  */

#include "relay_control.h"
#include "uart2_print.h"
#include "main.h"

#define DEBUG_RELAY  1

#if DEBUG_RELAY
#define DEBUG_LOG(fmt, ...)  UART2_Print_Printf("[RELAY] " fmt "\r\n", ##__VA_ARGS__)
#else
#define DEBUG_LOG(fmt, ...)
#endif

#define MAX_RELAY_ID    4

static bool current_states[MAX_RELAY_ID] = {false, false, false, false};
static uint32_t last_toggle_tick = 0;
static uint32_t toggle_count = 0;

void Relay_Init(void)
{
    HAL_GPIO_WritePin(RL_Control_GPIO_Port, RL_Control_Pin, GPIO_PIN_RESET);
    
    for (int i = 0; i < MAX_RELAY_ID; i++) {
        current_states[i] = false;
    }
    last_toggle_tick = 0;
    toggle_count = 0;
    
    DEBUG_LOG("Init OK, state=OFF");
}

void Relay_SetState(uint8_t relay_id, bool state)
{
    if (relay_id < 1 || relay_id > MAX_RELAY_ID) {
        DEBUG_LOG("Invalid relay ID: %d", relay_id);
        return;
    }
    
    uint32_t current_tick = HAL_GetTick();
    if (current_tick - last_toggle_tick < RELAY_MIN_INTERVAL) {
        DEBUG_LOG("Toggle too fast, ignored");
        return;
    }
    
    uint8_t idx = relay_id - 1;
    
    if (current_states[idx] == state) {
        DEBUG_LOG("State unchanged: %s", state ? "ON" : "OFF");
        return;
    }
    
    if (relay_id == 1) {
        HAL_GPIO_WritePin(RL_Control_GPIO_Port, RL_Control_Pin, 
                           state ? GPIO_PIN_SET : GPIO_PIN_RESET);
    }
    
    current_states[idx] = state;
    last_toggle_tick = current_tick;
    toggle_count++;
    
    DEBUG_LOG("Relay %d -> %s (count=%lu)", relay_id, state ? "ON" : "OFF", toggle_count);
}

bool Relay_GetState(uint8_t relay_id)
{
    if (relay_id < 1 || relay_id > MAX_RELAY_ID) {
        return false;
    }
    return current_states[relay_id - 1];
}

void Relay_Toggle(uint8_t relay_id)
{
    if (relay_id < 1 || relay_id > MAX_RELAY_ID) {
        return;
    }
    Relay_SetState(relay_id, !current_states[relay_id - 1]);
}

uint32_t Relay_GetToggleCount(void)
{
    return toggle_count;
}