package de.superx.bianalysis.models;

import com.fasterxml.jackson.annotation.JsonIgnore;

import de.superx.bianalysis.metadata.Identifier;
import de.superx.bianalysis.repository.dto.MeasureDto;
import de.superx.bianalysis.repository.dto.MeasureFilterDto;
import de.superx.rest.model.ColumnType;

public class Measure {

    private MeasureDto measureDto;
    
    @JsonIgnore
    public String filterTablename;

    @JsonIgnore
    public String filterJoincolumn;

    @JsonIgnore
    public String filterColumnname;

    @JsonIgnore
    public String filterInclude;

    @JsonIgnore
    public String filterExclude;

    @JsonIgnore
    public String filterDimensionTableAlias;

    @JsonIgnore
    public String filterCondition;

    @JsonIgnore
    public String factColumnFilter;

    @JsonIgnore
    public Identifier filterAttributeId;

    public Measure() {
        super();
    }

    public Measure(MeasureDto measureDTO) {
        this.measureDto = measureDTO;
    }

    public void setMeasureFilterAttributes(MeasureFilterDto filter, DimensionAttribute attribute, Dimension dimension) {
        this.filterInclude = filter.includedValues;
        this.filterExclude = filter.excludedValues;
        this.filterTablename = dimension.getTablename();
        this.filterJoincolumn = dimension.getJoincolumn();
        this.filterColumnname = attribute.getColumnname();
        this.filterAttributeId = attribute.getId();
        if (dimension.getAlias() != null) {
            this.filterDimensionTableAlias = dimension.getAlias();
        } else {
            this.filterDimensionTableAlias = generatefilterDimensionTableAlias(filterJoincolumn);
        }
        this.filterCondition = generateFilterCondition();
    }

    public void setFactColumnFilter(MeasureFilterDto filter) {
        this.factColumnFilter = filter.factColumnFilter;
        this.filterInclude = filter.includedValues;
        this.filterExclude = filter.excludedValues;
        this.filterCondition = generateFilterCondition();
    }
    
    private static String generatefilterDimensionTableAlias(String filterJoincolumn) {
        if (filterJoincolumn != null) {
            return filterJoincolumn.replaceFirst("_(id|lid)$", "");
        }
        return null;
    }

    private String generateFilterCondition() {
        if (this.measureDto.measureFilterId.value != null) {
            StringBuilder filterConditionStatement = new StringBuilder();
            String tableDotColumn = this.filterDimensionTableAlias + "." + this.filterColumnname;
            if(factColumnFilter != null && !factColumnFilter.isBlank()) {
               tableDotColumn = factColumnFilter;
            }
            if (this.filterInclude != null) {
                filterConditionStatement.append(tableDotColumn + " IN ("
                        + this.filterInclude + ")");
            }
            if (this.filterInclude != null && this.filterExclude != null) {
                filterConditionStatement.append(" AND ");
            }
            if (this.filterExclude != null) {
                filterConditionStatement.append(tableDotColumn
                        + " NOT IN (" + this.filterExclude + ")");
            }
            return filterConditionStatement.toString();
        }
        return null;
    }

    public Identifier getId() {
        return this.measureDto.id;
    }

    public String getCaption() {
        return this.measureDto.caption;
    }

    public String getColumnname() {
        return this.measureDto.columnname;
    }

    public String getDescription() {
        return this.measureDto.description;
    }

    public String getAggregationType() {
        return this.measureDto.aggregationType;
    }

    public ColumnType getMeasureType() {
        return ColumnType.valueOf(this.measureDto.measureType);
    }

    public Identifier getMeasureFilterId() {
        return this.measureDto.measureFilterId;
    }


}