package eu.eudat.migration.entities;

import eu.eudat.models.data.admin.components.datasetprofile.Field;
import eu.eudat.models.data.components.commons.DefaultValue;
import eu.eudat.models.data.components.commons.Visibility;
import org.hibernate.annotations.LazyCollection;
import org.hibernate.annotations.LazyCollectionOption;

import javax.persistence.*;
import java.util.*;
import java.util.stream.Collectors;

@Entity
@Table(name = "questions")
public class Question {

    public static Map<String, Long> fieldsQuestionsMap = new HashMap<>();

    @Id
    private Long id;
    private String text;
    @Column(name = "default_value")
    private String defaultValue;
    private Long number;
    @Column(name = "created_at")
    @Temporal(TemporalType.TIMESTAMP)
    private Date createdAt;
    @Column(name = "updated_at")
    @Temporal(TemporalType.TIMESTAMP)
    private Date updatedAt;
    @ManyToOne(fetch = FetchType.EAGER)
    @JoinColumn(name = "question_format_id")
    private QuestionFormat questionFormat;
    @Column(name = "option_comment_display")
    private Boolean optionCommentDisplay;
    private Boolean modifiable;
    @Column(name = "versionable_id")
    private String versionableId;
    @OneToMany(cascade = CascadeType.ALL)
    @JoinColumn(name = "question_id")
    @OrderBy("number")
    @LazyCollection(LazyCollectionOption.FALSE)
    private List<QuestionOption> options = new ArrayList<>();
    @OneToMany(cascade = CascadeType.ALL)
    @JoinColumn(name = "question_id")
    @OrderBy("number")
    @LazyCollection(LazyCollectionOption.FALSE)
    private List<Condition> conditions = new ArrayList<>();
    @ManyToMany(cascade = CascadeType.ALL)
    @JoinTable(name = "questions_themes",
            joinColumns = {@JoinColumn(name = "question_id")},
            inverseJoinColumns = {@JoinColumn(name = "theme_id")}
    )
    @LazyCollection(LazyCollectionOption.FALSE)
    private Set<Theme> themes = new HashSet<>();

    @Override
    public String toString() {
        return "Question{" +
                "id=" + id +
                ", text='" + text + '\'' +
                ", defaultValue='" + defaultValue + '\'' +
                ", number=" + number +
                ", createdAt=" + createdAt +
                ", updatedAt=" + updatedAt +
                ", questionFormat=" + questionFormat +
                ", optionCommentDisplay=" + optionCommentDisplay +
                ", modifiable=" + modifiable +
                ", versionableId='" + versionableId + '\'' +
                ", options=" + options +
                ", conditions=" + conditions +
                '}';
    }

    public Long getId() {
        return id;
    }

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

    public String getText() {
        return text;
    }

    public void setText(String text) {
        this.text = text;
    }

    public String getDefaultValue() {
        return defaultValue;
    }

    public void setDefaultValue(String defaultValue) {
        this.defaultValue = defaultValue;
    }

    public Long getNumber() {
        return number;
    }

    public void setNumber(Long number) {
        this.number = number;
    }

    public Date getCreatedAt() {
        return createdAt;
    }

    public void setCreatedAt(Date createdAt) {
        this.createdAt = createdAt;
    }

    public Date getUpdatedAt() {
        return updatedAt;
    }

    public void setUpdatedAt(Date updatedAt) {
        this.updatedAt = updatedAt;
    }

    public QuestionFormat getQuestionFormat() {
        return questionFormat;
    }

    public void setQuestionFormat(QuestionFormat questionFormat) {
        this.questionFormat = questionFormat;
    }

    public Boolean getOptionCommentDisplay() {
        return optionCommentDisplay;
    }

    public void setOptionCommentDisplay(Boolean optionCommentDisplay) {
        this.optionCommentDisplay = optionCommentDisplay;
    }

    public Boolean getModifiable() {
        return modifiable;
    }

    public void setModifiable(Boolean modifiable) {
        this.modifiable = modifiable;
    }

    public String getVersionableId() {
        return versionableId;
    }

    public void setVersionableId(String versionableId) {
        this.versionableId = versionableId;
    }

    public List<QuestionOption> getOptions() {
        return options;
    }

    public void setOptions(List<QuestionOption> options) {
        this.options = options;
    }


    public List<Condition> getConditions() {
        return conditions;
    }

    public void setConditions(List<Condition> conditions) {
        this.conditions = conditions;
    }

    public Set<Theme> getThemes() {
        return themes;
    }

    public void setThemes(Set<Theme> themes) {
        this.themes = themes;
    }

    public String buildDescription() {
        StringBuilder sb = new StringBuilder();
        themes.forEach(theme -> {
            if(theme.getTitle() != null) {
                sb.append("<b>").append(theme.getTitle()).append("</b><br>");
            }
            if(theme.getDescription() != null) {
                sb.append("<p>").append(theme.getDescription()).append("</p>");
            }
            if(theme.getGuidances().size() > 0) {
                theme.getGuidances().forEach(guidance -> {
                    sb.append("<b>").append(guidance.getGuidanceGroup().getName()).append("</b><br>");
                    sb.append("<p>").append(guidance.getText()).append("</p>");
                });
            }
        });
        return sb.toString();
    }

    public List<Field> buildFields() {
        Field field = new Field();
        field.setId(String.valueOf(UUID.randomUUID()));
        field.setOrdinal(0);
        field.setDefaultValue(this.buildDefaultValue());
        field.setValue(field.getDefaultValue().getValue());
        field.setValidations(this.buildValidators());
        field.setVisible(this.buildVisibility());
        field.setViewStyle(this.getQuestionFormat().buildViewStyle());
        field.setData(this.buildData());
        fieldsQuestionsMap.put(field.getId(), getId());
        return Collections.singletonList(field);
    }

    private DefaultValue buildDefaultValue() {
        DefaultValue defaultValue = new DefaultValue();
        defaultValue.setType("String");
        defaultValue.setValue((this.defaultValue != null)?this.defaultValue :"");
        return defaultValue;
    }

    private List<Integer> buildValidators() {
        return Collections.singletonList((int) Field.ValidationType.REQUIRED.getValue());
    }

    private Visibility buildVisibility() {
        Visibility visibility = new Visibility();
        visibility.setRules(new ArrayList<>());
        visibility.setStyle("");
        return visibility;
    }

    private Map<String, Object> buildData() {
        Map<String, Object> object = new HashMap<>();
        object.put("label", "");
        if(this.getQuestionFormat().getOptionBased()) {
            object.put("options", this.getOptions().stream().map(questionOption -> {
                Map<String, Object> option = new HashMap<>();
                option.put(questionOption.getText(), questionOption.getText());
                return option;
            }).collect(Collectors.toList()));
        }
        if(this.getQuestionFormat().getFormattype() == QuestionFormat.FormatType.DROPDOWN ||
                this.getQuestionFormat().getFormattype() == QuestionFormat.FormatType.MULTI_SELECT) {
            object.put("type", "wordlist");
            object.put("multiList", this.getQuestionFormat().getFormattype() == QuestionFormat.FormatType.MULTI_SELECT);
        }
        return object;
    }
}