package org.gcube.informationsystem.utils.documentation.model;

import java.util.Map;
import java.util.Set;

import org.gcube.informationsystem.types.reference.Type;
import org.gcube.informationsystem.types.reference.properties.PropertyDefinition;
import org.gcube.informationsystem.utils.documentation.rst.Section;
import org.gcube.informationsystem.utils.documentation.rst.Section.SectionType;
import org.gcube.informationsystem.utils.documentation.rst.table.Cell;
import org.gcube.informationsystem.utils.documentation.rst.table.Row;
import org.gcube.informationsystem.utils.documentation.rst.table.RowType;
import org.gcube.informationsystem.utils.documentation.rst.table.Table;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * @author Luca Frosini (ISTI - CNR)
 */
public abstract class DocumentationGenerator {
	
	private static final Logger logger = LoggerFactory.getLogger(DocumentationGenerator.class);
	
	protected final Type type;
	protected final String superClassToBeExcluded;
	
	protected DocumentationGenerator(Type type, String superClassToBeExcluded) {
		this.type = type;
		this.superClassToBeExcluded = superClassToBeExcluded;
	}
	
	protected Row getPropertiesBoldRow() {
		Row row = new Row(RowType.NORMAL);
		Cell name = new Cell();
		name.setText("**Name**");
		row.appendCell(name);
		Cell type = new Cell();
		type.setText("**Type**");
		row.appendCell(type);
		Cell attributes = new Cell();
		attributes.setText("**Attributes**");
		row.appendCell(attributes);
		Cell description = new Cell();
		description.setText("**Description**");
		row.appendCell(description);
		return row;
	}

	
	protected Row getPropertiesHeadingRow() {
		Row row = new Row(RowType.HEADING);
		Cell name = new Cell();
		name.setText("Name");
		row.appendCell(name);
		Cell type = new Cell();
		type.setText("Type");
		row.appendCell(type);
		Cell attributes = new Cell();
		attributes.setText("Attributes");
		row.appendCell(attributes);
		Cell description = new Cell();
		description.setText("Description");
		row.appendCell(description);
		return row;
	}
	
	protected String getPropertyAttributes(PropertyDefinition propertyDefinition) {
		StringBuffer stringBuffer = new StringBuffer();
		
		boolean mandatory = propertyDefinition.isMandatory();
		stringBuffer.append("``Mandatory:");
		stringBuffer.append(mandatory);
		
		boolean readOnly = propertyDefinition.isReadonly();
		stringBuffer.append("`` ``ReadOnly:");
		stringBuffer.append(readOnly);
		
		boolean notNull = propertyDefinition.isNotnull();
		stringBuffer.append("`` ``NotNull:");
		stringBuffer.append(notNull);
		
		String regex = propertyDefinition.getRegexp();
		if(regex!=null && regex.compareTo("")!=0) {
			stringBuffer.append("`` ``Regex:");
			stringBuffer.append(regex);
		}
		
		Integer max = propertyDefinition.getMax();
		if(max!=null) {
			stringBuffer.append("`` ``Max:");
			stringBuffer.append(max);
		}
		
		Integer min = propertyDefinition.getMin();
		if(min!=null) {
			stringBuffer.append("`` ``Min:");
			stringBuffer.append(min);
		}
		stringBuffer.append("``");
		return stringBuffer.toString();
	}
	
	protected Row getPropertyRow(PropertyDefinition propertyDefinition) {
		Row row = new Row(RowType.NORMAL);
		Cell name = new Cell();
		name.setText(propertyDefinition.getName());
		row.appendCell(name);
		Cell type = new Cell();
		type.setText(propertyDefinition.getType());
		row.appendCell(type);
		Cell attributes = new Cell();
		attributes.setText(getPropertyAttributes(propertyDefinition));
		row.appendCell(attributes);
		Cell description = new Cell();
		description.setText(propertyDefinition.getDescription());
		row.appendCell(description);
		return row;
	}
	
	protected Row getNoPropertyRow() {
		return getRowCellSpan("This type does not define any additional attributes.", 4);
	}
	
	protected Row addCellSpanToRow(Row row, String content, int cellSpan) {
		Cell cellToSpan = new Cell();
		cellToSpan.setText(content);
		for(int i=0; i<cellSpan; i++) {
			row.appendCell(cellToSpan);
		}
		return row;
	}
	
	protected Row getRowCellSpan(String content, int cellSpan) {
		Row row = new Row(RowType.NORMAL);
		return addCellSpanToRow(row, content, cellSpan);
	}
	
	/*
	 * E.g. GCubeProperty extends Property
	 */
	protected StringBuffer getTypeDeclaration() {
		StringBuffer stringBuffer = new StringBuffer();
		stringBuffer.append("**");
		stringBuffer.append(type.getName());
		stringBuffer.append("**");
		Set<String> superClasses = type.getSuperClasses();
		if(superClassToBeExcluded!=null) {
			superClasses.remove(superClassToBeExcluded);
		}
		if(superClasses.size()>0){
			stringBuffer.append(" ``extends`` ");
			boolean first = true;
			for(String superClass : superClasses) {
				if(!first) {
					stringBuffer.append(", ");
				}else {
					first = false;
				}
				stringBuffer.append("**");
				stringBuffer.append(superClass);
				stringBuffer.append("**");
			}
		}
		return stringBuffer;
	}
	
	protected StringBuffer getChangelog() {
		StringBuffer stringBuffer = new StringBuffer();
		stringBuffer.append("The **");
		stringBuffer.append(type.getName());
		stringBuffer.append("** current version is ");
		stringBuffer.append(type.getVersionAsString());
		stringBuffer.append(".\n\n");
		Map<String, String> changelog = type.getChangelogWithVersionAsString();
		Set<String> keySet = changelog.keySet();
		stringBuffer.append("Changelog:\n\n");
		int i=0;
		for(String version : keySet) {
			stringBuffer.append("* **");
			stringBuffer.append(version);
			stringBuffer.append("**: ");
			stringBuffer.append(changelog.get(version));
			if(i==keySet.size()-1) {
				stringBuffer.append(".");
			}else {
				stringBuffer.append(";");
			}
		}
		stringBuffer.append("\n\n");
		return stringBuffer;
	}

	protected abstract Table getTable();
	
	public StringBuffer generateSection() {
		StringBuffer stringBuffer = new StringBuffer();
		stringBuffer.append("\n");
		String name = type.getName();
		Section section = new Section();
		stringBuffer.append(section.generateSection(SectionType.HEADING_3, name));
		stringBuffer.append(type.getDescription());
		stringBuffer.append("\n");
		
		String tableTitle = getTypeDeclaration().toString();
		Table table = getTable();
		stringBuffer.append(table.generateTable(tableTitle));
		
		stringBuffer.append(getChangelog());
		
		logger.info(stringBuffer.toString());
		return stringBuffer;
	}
}