package com.gbcm.server.impl.entity;

import com.gbcm.server.api.enums.ServiceType;
import com.gbcm.server.api.enums.SessionStatus;
import io.quarkus.hibernate.orm.panache.PanacheEntityBase;
import jakarta.persistence.*;
import jakarta.validation.constraints.NotBlank;
import jakarta.validation.constraints.NotNull;
import jakarta.validation.constraints.Size;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.List;

/**
 * Entité représentant une session de coaching GBCM.
 * Hérite de BaseEntity pour les champs d'audit et la suppression logique.
 * 
 * @author GBCM Development Team
 * @version 1.0
 * @since 1.0
 */
@Entity
@Table(name = "coaching_sessions")
@NamedQueries({
    @NamedQuery(name = "CoachingSession.findByStatus", 
                query = "SELECT cs FROM CoachingSession cs WHERE cs.status = :status AND cs.deleted = false"),
    @NamedQuery(name = "CoachingSession.findByCoach", 
                query = "SELECT cs FROM CoachingSession cs WHERE cs.coach.id = :coachId AND cs.deleted = false ORDER BY cs.scheduledDateTime DESC"),
    @NamedQuery(name = "CoachingSession.findByClient", 
                query = "SELECT cs FROM CoachingSession cs WHERE cs.client.id = :clientId AND cs.deleted = false ORDER BY cs.scheduledDateTime DESC"),
    @NamedQuery(name = "CoachingSession.findUpcoming", 
                query = "SELECT cs FROM CoachingSession cs WHERE cs.scheduledDateTime > :now AND cs.status = 'SCHEDULED' AND cs.deleted = false ORDER BY cs.scheduledDateTime ASC"),
    @NamedQuery(name = "CoachingSession.findByDateRange", 
                query = "SELECT cs FROM CoachingSession cs WHERE cs.scheduledDateTime >= :startDate AND cs.scheduledDateTime <= :endDate AND cs.deleted = false ORDER BY cs.scheduledDateTime ASC")
})
public class CoachingSession extends BaseEntity {

    /**
     * Identifiant unique de la session.
     */
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "id")
    private Long id;

    /**
     * Titre de la session.
     */
    @Column(name = "title", nullable = false, length = 200)
    @NotBlank(message = "Le titre est obligatoire")
    @Size(max = 200, message = "Le titre ne peut pas dépasser 200 caractères")
    private String title;

    /**
     * Description de la session.
     */
    @Column(name = "description", columnDefinition = "TEXT")
    private String description;

    /**
     * Type de service de coaching.
     */
    @Enumerated(EnumType.STRING)
    @Column(name = "service_type", nullable = false, length = 30)
    @NotNull(message = "Le type de service est obligatoire")
    private ServiceType serviceType;

    /**
     * Coach de la session.
     */
    @ManyToOne(fetch = FetchType.LAZY)
    @JoinColumn(name = "coach_id", nullable = false, 
                foreignKey = @ForeignKey(name = "fk_coaching_session_coach_id"))
    @NotNull(message = "Le coach est obligatoire")
    private Coach coach;

    /**
     * Client de la session.
     */
    @ManyToOne(fetch = FetchType.LAZY)
    @JoinColumn(name = "client_id", nullable = false, 
                foreignKey = @ForeignKey(name = "fk_coaching_session_client_id"))
    @NotNull(message = "Le client est obligatoire")
    private Client client;

    /**
     * Date et heure prévues de la session.
     */
    @Column(name = "scheduled_datetime", nullable = false)
    @NotNull(message = "La date prévue est obligatoire")
    private LocalDateTime scheduledDateTime;

    /**
     * Date et heure réelles de début.
     */
    @Column(name = "actual_start_datetime")
    private LocalDateTime actualStartDateTime;

    /**
     * Date et heure réelles de fin.
     */
    @Column(name = "actual_end_datetime")
    private LocalDateTime actualEndDateTime;

    /**
     * Durée prévue en minutes.
     */
    @Column(name = "planned_duration_minutes", nullable = false)
    @NotNull(message = "La durée prévue est obligatoire")
    private Integer plannedDurationMinutes;

    /**
     * Durée réelle en minutes.
     */
    @Column(name = "actual_duration_minutes")
    private Integer actualDurationMinutes;

    /**
     * Lieu de la session (physique ou virtuel).
     */
    @Column(name = "location", length = 255)
    @Size(max = 255, message = "Le lieu ne peut pas dépasser 255 caractères")
    private String location;

    /**
     * Lien de réunion virtuelle.
     */
    @Column(name = "meeting_link", length = 500)
    @Size(max = 500, message = "Le lien de réunion ne peut pas dépasser 500 caractères")
    private String meetingLink;

    /**
     * Prix de la session.
     */
    @Column(name = "price", precision = 10, scale = 2)
    private BigDecimal price;

    /**
     * Statut de la session.
     */
    @Enumerated(EnumType.STRING)
    @Column(name = "status", nullable = false, length = 20)
    @NotNull(message = "Le statut est obligatoire")
    private SessionStatus status = SessionStatus.SCHEDULED;

    /**
     * Objectifs de la session.
     */
    @Column(name = "objectives", columnDefinition = "TEXT")
    private String objectives;

    /**
     * Résumé de la session (rempli après).
     */
    @Column(name = "summary", columnDefinition = "TEXT")
    private String summary;

    /**
     * Actions à suivre (rempli après).
     */
    @Column(name = "action_items", columnDefinition = "TEXT")
    private String actionItems;

    /**
     * Évaluation du client (1-5).
     */
    @Column(name = "client_rating")
    private Integer clientRating;

    /**
     * Commentaires du client.
     */
    @Column(name = "client_feedback", columnDefinition = "TEXT")
    private String clientFeedback;

    /**
     * Notes internes du coach.
     */
    @Column(name = "coach_notes", columnDefinition = "TEXT")
    private String coachNotes;

    /**
     * Notes internes sur la session.
     */
    @Column(name = "notes", columnDefinition = "TEXT")
    private String notes;

    /**
     * Constructeur par défaut.
     */
    public CoachingSession() {
    }

    /**
     * Méthodes métier pour la gestion des sessions.
     */

    /**
     * Démarre la session.
     */
    public void start() {
        if (this.status == SessionStatus.SCHEDULED) {
            this.status = SessionStatus.IN_PROGRESS;
            this.actualStartDateTime = LocalDateTime.now();
        }
    }

    /**
     * Termine la session.
     */
    public void complete() {
        if (this.status == SessionStatus.IN_PROGRESS) {
            this.status = SessionStatus.COMPLETED;
            this.actualEndDateTime = LocalDateTime.now();
            
            // Calculer la durée réelle
            if (actualStartDateTime != null && actualEndDateTime != null) {
                long minutes = java.time.Duration.between(actualStartDateTime, actualEndDateTime).toMinutes();
                this.actualDurationMinutes = (int) minutes;
            }
        }
    }

    /**
     * Annule la session.
     */
    public void cancel() {
        if (this.status == SessionStatus.SCHEDULED || this.status == SessionStatus.IN_PROGRESS) {
            this.status = SessionStatus.CANCELLED;
        }
    }

    /**
     * Reporte la session.
     */
    public void postpone() {
        if (this.status == SessionStatus.SCHEDULED) {
            this.status = SessionStatus.RESCHEDULED;
        }
    }

    /**
     * Marque la session comme non présentée.
     */
    public void markNoShow() {
        if (this.status == SessionStatus.SCHEDULED) {
            this.status = SessionStatus.NO_SHOW;
        }
    }

    /**
     * Vérifie si la session peut être modifiée.
     * 
     * @return true si la session peut être modifiée
     */
    public boolean canBeModified() {
        return status == SessionStatus.SCHEDULED || status == SessionStatus.RESCHEDULED;
    }

    /**
     * Vérifie si la session peut être évaluée.
     * 
     * @return true si la session peut être évaluée
     */
    public boolean canBeRated() {
        return status == SessionStatus.COMPLETED;
    }

    /**
     * Calcule le prix basé sur le tarif horaire du coach.
     * 
     * @return le prix calculé
     */
    public BigDecimal calculatePrice() {
        if (coach != null && coach.getHourlyRate() != null && plannedDurationMinutes != null) {
            BigDecimal hourlyRate = coach.getHourlyRate();
            BigDecimal hours = new BigDecimal(plannedDurationMinutes).divide(new BigDecimal(60), 2, java.math.RoundingMode.HALF_UP);
            return hourlyRate.multiply(hours);
        }
        return BigDecimal.ZERO;
    }

    /**
     * Méthodes de recherche statiques.
     */

    /**
     * Recherche par statut.
     * 
     * @param status le statut à rechercher
     * @return la liste des sessions avec ce statut
     */
    public static List<CoachingSession> findByStatus(SessionStatus status) {
        return find("#CoachingSession.findByStatus", status).list();
    }

    /**
     * Recherche par coach.
     * 
     * @param coachId l'ID du coach
     * @return la liste des sessions de ce coach
     */
    public static List<CoachingSession> findByCoach(Long coachId) {
        return find("#CoachingSession.findByCoach", coachId).list();
    }

    /**
     * Recherche par client.
     * 
     * @param clientId l'ID du client
     * @return la liste des sessions de ce client
     */
    public static List<CoachingSession> findByClient(Long clientId) {
        return find("#CoachingSession.findByClient", clientId).list();
    }

    /**
     * Recherche des sessions à venir.
     * 
     * @return la liste des sessions à venir
     */
    public static List<CoachingSession> findUpcoming() {
        return find("#CoachingSession.findUpcoming", LocalDateTime.now()).list();
    }

    /**
     * Recherche par plage de dates.
     * 
     * @param startDate date de début
     * @param endDate date de fin
     * @return la liste des sessions dans cette plage
     */
    public static List<CoachingSession> findByDateRange(LocalDateTime startDate, LocalDateTime endDate) {
        return find("#CoachingSession.findByDateRange", startDate, endDate).list();
    }

    // Getters et Setters

    public Long getId() {
        return id;
    }

    public void setId(Long id) {
        this.id = id;
    }

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }

    public String getDescription() {
        return description;
    }

    public void setDescription(String description) {
        this.description = description;
    }

    public ServiceType getServiceType() {
        return serviceType;
    }

    public void setServiceType(ServiceType serviceType) {
        this.serviceType = serviceType;
    }

    public Coach getCoach() {
        return coach;
    }

    public void setCoach(Coach coach) {
        this.coach = coach;
    }

    public Client getClient() {
        return client;
    }

    public void setClient(Client client) {
        this.client = client;
    }

    public LocalDateTime getScheduledDateTime() {
        return scheduledDateTime;
    }

    public void setScheduledDateTime(LocalDateTime scheduledDateTime) {
        this.scheduledDateTime = scheduledDateTime;
    }

    public LocalDateTime getActualStartDateTime() {
        return actualStartDateTime;
    }

    public void setActualStartDateTime(LocalDateTime actualStartDateTime) {
        this.actualStartDateTime = actualStartDateTime;
    }

    public LocalDateTime getActualEndDateTime() {
        return actualEndDateTime;
    }

    public void setActualEndDateTime(LocalDateTime actualEndDateTime) {
        this.actualEndDateTime = actualEndDateTime;
    }

    public Integer getPlannedDurationMinutes() {
        return plannedDurationMinutes;
    }

    public void setPlannedDurationMinutes(Integer plannedDurationMinutes) {
        this.plannedDurationMinutes = plannedDurationMinutes;
    }

    public Integer getActualDurationMinutes() {
        return actualDurationMinutes;
    }

    public void setActualDurationMinutes(Integer actualDurationMinutes) {
        this.actualDurationMinutes = actualDurationMinutes;
    }

    public String getLocation() {
        return location;
    }

    public void setLocation(String location) {
        this.location = location;
    }

    public String getMeetingLink() {
        return meetingLink;
    }

    public void setMeetingLink(String meetingLink) {
        this.meetingLink = meetingLink;
    }

    public BigDecimal getPrice() {
        return price;
    }

    public void setPrice(BigDecimal price) {
        this.price = price;
    }

    public SessionStatus getStatus() {
        return status;
    }

    public void setStatus(SessionStatus status) {
        this.status = status;
    }

    public String getObjectives() {
        return objectives;
    }

    public void setObjectives(String objectives) {
        this.objectives = objectives;
    }

    public String getSummary() {
        return summary;
    }

    public void setSummary(String summary) {
        this.summary = summary;
    }

    public String getActionItems() {
        return actionItems;
    }

    public void setActionItems(String actionItems) {
        this.actionItems = actionItems;
    }

    public Integer getClientRating() {
        return clientRating;
    }

    public void setClientRating(Integer clientRating) {
        this.clientRating = clientRating;
    }

    public String getClientFeedback() {
        return clientFeedback;
    }

    public void setClientFeedback(String clientFeedback) {
        this.clientFeedback = clientFeedback;
    }

    public String getCoachNotes() {
        return coachNotes;
    }

    public void setCoachNotes(String coachNotes) {
        this.coachNotes = coachNotes;
    }

    public String getNotes() {
        return notes;
    }

    public void setNotes(String notes) {
        this.notes = notes;
    }

    @Override
    public String toString() {
        return "CoachingSession{" +
                "id=" + id +
                ", title='" + title + '\'' +
                ", serviceType=" + serviceType +
                ", status=" + status +
                ", scheduledDateTime=" + scheduledDateTime +
                ", plannedDurationMinutes=" + plannedDurationMinutes +
                '}';
    }
}