#include "light_controller.hpp"

#include <iostream>
#include <thread>

#include "spdlog/spdlog.h"

LightController::LightController(std::string baseUrl, std::string token)
	: baseUrl(baseUrl), token(token) {
	// 启动后台工作线程
	running_ = true;
	InitializeDevices();
	worker_thread_ = std::thread(&LightController::WorkerLoop, this);
	spdlog::info("[LightController] Worker thread started.");
}

LightController::~LightController() {
	// 优雅停止线程
	{
		std::lock_guard<std::mutex> lock(queue_mutex_);
		running_ = false;
	}
	cv_.notify_all();  // 唤醒线程让它退出
	if (worker_thread_.joinable()) {
		worker_thread_.join();
	}
}
size_t LightController::WriteCallback(void* contents, size_t size, size_t nmemb, void* userp) {
	((std::string*)userp)->append((char*)contents, size * nmemb);
	return size * nmemb;
}

// 底层 HTTP 发送逻辑
bool LightController::SendHttpCommand(std::string deviceId, std::string switchType) {
	CURL* curl;
	CURLcode res;
	std::string readBuffer;
	long httpCode = 0;
	bool success = false;
	spdlog::info("Send Http Command:{}|{} ", deviceId, switchType);
	curl = curl_easy_init();
	if (curl) {
		spdlog::info("Start Send");
		std::string url = this->baseUrl + "/hk_service/modbus/lightControl";
		curl_easy_setopt(curl, CURLOPT_URL, url.c_str());
		curl_easy_setopt(curl, CURLOPT_POST, 1L);

		struct curl_slist* headers = NULL;
		std::string tokenHeader = "token: " + this->token;
		headers = curl_slist_append(headers, tokenHeader.c_str());
		headers = curl_slist_append(headers, "Content-Type: application/x-www-form-urlencoded");
		curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);

		std::string postData = "deviceId=" + deviceId + "&type=" + switchType;
		curl_easy_setopt(curl, CURLOPT_POSTFIELDS, postData.c_str());
		curl_easy_setopt(curl, CURLOPT_TIMEOUT, 5L);
		curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, WriteCallback);
		curl_easy_setopt(curl, CURLOPT_WRITEDATA, &readBuffer);

		res = curl_easy_perform(curl);
		if (res != CURLE_OK) {
			spdlog::error("[LightControl] Request failed: {}", curl_easy_strerror(res));
		} else {
			curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &httpCode);
			if (httpCode == 200)
				success = true;
		}
		curl_slist_free_all(headers);
		curl_easy_cleanup(curl);
	}
	return success;
}

// 手动控制：直接执行，并清空该设备的投票箱（打断自动逻辑）
// 手动控制：强制覆盖，并清空该设备的投票箱
bool LightController::ControlLight(std::string deviceId, std::string switchType) {
	std::lock_guard<std::mutex> lock(vote_mutex_);
	light_votes_.erase(deviceId);  // 清除自动控制的状态，避免干扰

	// 这里直接同步发送，或者你也可以扔进队列
	// 为了手动响应速度，直接发是OK的，因为手动点击频率低
	return SendHttpCommand(deviceId, switchType);
}

// [核心] 投票逻辑
void LightController::UpdateAutoLight(std::string deviceId, std::string sourceId, bool voteOn) {
	std::lock_guard<std::mutex> lock(vote_mutex_);

	auto& votes = light_votes_[deviceId];
	bool was_on = !votes.empty();

	if (voteOn) {
		votes.insert(sourceId);
	} else {
		votes.erase(sourceId);
	}

	bool is_on = !votes.empty();

	// 只有状态改变才触发
	if (was_on != is_on || deviceStatus[deviceId]) {
		if (deviceStatus[deviceId]) {
			spdlog::info("[AutoLight] ForceControll.");
		}
		deviceStatus[deviceId] = false;
		std::string action = is_on ? "1" : "0";
		spdlog::info("[AutoLight] Logic Change: Device {} -> {}", deviceId, is_on ? "ON" : "OFF");

		// --- 关键修改开始 ---
		{
			std::lock_guard<std::mutex> q_lock(queue_mutex_);
			// 存入 map。如果 map 里已经有这个设备的指令，直接覆盖！
			// 这就完美解决了“短时间反复开关”的问题，只执行最后一次。
			pending_actions_[deviceId] = action;
		}
		cv_.notify_one();  // 唤醒工作线程
						   // --- 关键修改结束 ---
	}
}

// [核心] 会话清理：摄像头掉线时自动撤票
void LightController::RemoveSession(std::string sourceId) {
	std::lock_guard<std::mutex> lock(vote_mutex_);
	// ... (逻辑同前，只是最后发指令改成扔进队列) ...
	for (auto& pair : light_votes_) {
		std::string deviceId = pair.first;
		std::set<std::string>& votes = pair.second;

		if (votes.count(sourceId)) {
			bool was_on = !votes.empty();
			votes.erase(sourceId);
			bool is_on = !votes.empty();

			if ((was_on && !is_on) || deviceStatus[deviceId]) {
				if (deviceStatus[deviceId]) {
					spdlog::info("[AutoLight] ForceControll.");
				}
				deviceStatus[deviceId] = false;
				spdlog::info("[AutoLight] Source {} disconnect. Turning OFF {}.", sourceId,
							 deviceId);
				{
					std::lock_guard<std::mutex> q_lock(queue_mutex_);
					pending_actions_[deviceId] = "0";
				}
				cv_.notify_one();
			}
		}
	}
}

// [新增] 核心工作线程：串行处理网络请求
void LightController::WorkerLoop() {
	while (true) {
		std::string target_device;
		std::string target_action;

		{
			std::unique_lock<std::mutex> lock(queue_mutex_);

			// 等待，直到有任务 或者 要求停止
			cv_.wait(lock, [this] { return !running_ || !pending_actions_.empty(); });

			if (!running_ && pending_actions_.empty()) {
				break;	// 退出线程
			}

			// 取出一个任务
			auto it = pending_actions_.begin();
			target_device = it->first;
			target_action = it->second;

			// 从 map 中移除，表示开始处理
			pending_actions_.erase(it);
		}

		// 释放锁后再执行耗时的网络操作！
		// 这样不会阻塞 UpdateAutoLight
		SendHttpCommand(target_device, target_action);

		// 可选：这里可以加一个微小的 sleep，比如 50ms
		// 防止对老旧硬件发起过于密集的连续请求（如果控制多个灯的话）
		std::this_thread::sleep_for(std::chrono::milliseconds(50));
	}
}