#pragma once

#include <chrono>
#include <map>
#include <string>

class CConfiguration;

enum class ProductionShiftType : int {
	Day = 1,
	Night = 2
};

struct ProductionShiftWindow {
	ProductionShiftType type{ ProductionShiftType::Day };
	std::chrono::system_clock::time_point start{};
	std::chrono::system_clock::time_point end{};
	std::string startLocal;   // "YYYY-MM-DD HH:MM:SS"
	std::string endLocal;     // "YYYY-MM-DD HH:MM:SS"
	std::string startUtcIso;  // "YYYY-MM-DDTHH:MM:SSZ"
	std::string endUtcIso;    // "YYYY-MM-DDTHH:MM:SSZ"
};

struct ProductionOutputSummary {
	long long pairsTotal = 0;        // "对数"
	long long pairsPass = 0;
	long long pairsFail = 0;
	long long pairsNoResult = 0;
	double yield = 0.0;              // pairsPass / (pairsPass + pairsFail), 0 if denom==0

	// Average takt time derived from glass_log.t_start/t_end (per pair, seconds)
	double avgTaktSeconds = 0.0;
	long long taktSamplePairs = 0;
};

struct ProductionAlarmSummary {
	int alarmsTriggered = 0;         // start_time within shift window
	int alarmsOverlapping = 0;       // overlaps shift window (including active)
	double downtimeMinutes = 0.0;    // overlap minutes (best-effort)
	std::map<int, int> bySeverity;   // severity_level -> count (overlapping)
};

struct ProductionTransferSummary {
	int transfersFinished = 0;        // end_time within shift window
	std::map<std::string, int> byStatus;
	double avgCreateToEndSeconds = 0.0;
};

struct ProductionShiftSummary {
	ProductionShiftWindow window;
	ProductionOutputSummary output;
	ProductionAlarmSummary alarms;
	ProductionTransferSummary transfers;
};

class ProductionStats {
public:
	static bool GetCurrentShiftWindow(CConfiguration& config, ProductionShiftWindow& outWindow);
	static bool ComputeCurrentShiftSummary(CConfiguration& config, ProductionShiftSummary& outSummary);
	static void LogCurrentShiftSummary(CConfiguration& config);

	// Computes "current shift" and its adjacent other shift, so UI can always show Day+Night numbers.
	// - If current is Day: day=current day shift, night=previous night shift.
	// - If current is Night: night=current night shift, day=previous day shift.
	static bool ComputeDayNightSummaries(CConfiguration& config, ProductionShiftSummary& outDay, ProductionShiftSummary& outNight);
};