#ifndef API_CLIENT_H
#define API_CLIENT_H

#include <QObject>
#include <QByteArray>
#include <QMap>
#include <QNetworkAccessManager>
#include <QNetworkReply>
#include <QNetworkRequest>
#include <QStringList>
#include <QVector>
#include "AttendanceTypes.h"

class ApiClient : public QObject
{
    Q_OBJECT

public:
    explicit ApiClient(QObject *parent = nullptr);

    void setServerUrl(const QString &url);
    QString serverUrl() const;

    void fetchRecords(int limit = 1000, int offset = 0);
    void fetchStatistics();
    void clearAllRecords();
    void deleteRecord(const QString &timestamp, const QString &studentId);
    void fetchTimeSlots();
    void uploadTimeSlots(const QVector<TimeSlot> &timeSlots);
    void fetchMappingConfig();
    void uploadMappingConfig(const QMap<QString, QString> &studentNameMap,
                             const QMap<QString, QString> &classNameMap);
    void fetchFaceIdMapping();
    void uploadFaceIdMapping(const QMap<QString, QString> &mapping);
    void fetchFacePhotos();
    void fetchAllStudentIds();
    void deleteFace(const QString &studentId, bool deleteRecords);
    void checkHealth();

signals:
    void recordsFetched(const QVector<AttendanceRecord> &records);
    void statisticsFetched(int total, int today, const QString &serverTime);
    void recordsCleared(bool success, const QString &message);
    void recordDeleted(bool success, const QString &message);
    void timeSlotsFetched(const QVector<TimeSlot> &timeSlots);
    void timeSlotsUploaded(bool success, const QString &message);
    void mappingConfigFetched(const QMap<QString, QString> &studentNameMap,
                              const QMap<QString, QString> &classNameMap);
    void mappingConfigUploaded(bool success, const QString &message);
    void faceIdMappingFetched(const QMap<QString, QString> &mapping);
    void faceIdMappingUploaded(bool success, const QString &message);
    void facePhotosFetched(const QStringList &photoIds);
    void allStudentIdsFetched(const QStringList &studentIds);
    void faceDeleted(bool success, const QString &studentId, int recordsDeleted, const QString &message);
    void healthChecked(bool healthy, const QString &message);
    void connectionUnavailable(const QString &message);
    void networkError(const QString &message);

private:
    QString buildUrl(const QString &endpoint, const QMap<QString, QString> &params = {}) const;
    QNetworkRequest createRequest(const QString &url, bool encryptedResponse = false) const;
    QVector<AttendanceRecord> parseRecords(const QByteArray &data) const;
    QByteArray maybeDecrypt(const QByteArray &data, bool encrypted) const;
    void emitNetworkError(const QString &prefix, QNetworkReply *reply);
    bool isConnectionError(QNetworkReply::NetworkError error) const;

    QNetworkAccessManager m_networkManager;
    QString m_serverUrl;
};

#endif