package com.rthoni.intellij.codefromds.business;

import com.intellij.database.psi.DbDataSource;
import com.intellij.openapi.project.Project;
import com.rthoni.intellij.codefromds.dbo.options.ColumnSelection;
import com.rthoni.intellij.codefromds.dbo.options.GenerateOptions;
import com.rthoni.intellij.codefromds.dbo.options.TableSelection;
import com.rthoni.intellij.codefromds.dbo.options.TypesCastOptions;
import com.rthoni.intellij.codefromds.dbo.template.ColumnDataSourceDbo;
import com.rthoni.intellij.codefromds.dbo.template.DataSourceDbo;
import com.rthoni.intellij.codefromds.dbo.template.SqlTypeDbo;
import com.rthoni.intellij.codefromds.dbo.template.TableDataSourceDbo;
import org.json.JSONArray;
import org.json.JSONObject;
import org.jtwig.JtwigModel;
import org.jtwig.JtwigTemplate;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.HashMap;
import java.util.List;
import java.util.Vector;

/**
 * Created by robin on 11/15/16.
 */
public abstract class Generator {

    public static void saveOptions(GenerateOptions options) throws Exception
    {
        HashMap<String, Object> map = options.toMap();
        JSONObject obj = new JSONObject(map);
        FileOutputStream file = new FileOutputStream(options.getConfigAbsolutePath());
        file.write(obj.toString(4).getBytes());
        file.close();
    }

    public static GenerateOptions loadOptions(String configPath) throws Exception
    {
        String data = Helper.readFile(configPath);

        JSONObject obj = new JSONObject(data);
        String src = obj.getJSONObject("selection").getString("source");

        DbDataSource dataSource = Helper.findDataSource(src);
        if (dataSource == null) {
            throw new Exception("Data source " + src + " not found");
        }

        GenerateOptions options = new GenerateOptions(dataSource);
        options.setConfigAbsolutePath(configPath);
        options.fromJson(obj);
        return options;
    }

    public static String convertSqlType(SqlTypeDbo type, TypesCastOptions options)
    {
        boolean isArray = type.getType().endsWith("[]");
        String sqlTypeName = isArray ? type.getType().substring(0, type.getType().length() - 2) : type.getType();
        String typeName = type.getType();
        HashMap<String, HashMap<String, String>> types = options.getTypes();

        if (types.containsKey(sqlTypeName)) {
            HashMap<String, String> subtype = types.get(sqlTypeName);
            if (subtype.containsKey(type.getVagueArg())) {
                typeName = subtype.get(type.getVagueArg());
            }
            else if (subtype.containsKey("*")) {
                typeName = subtype.get("*");
            }
        }
        if (isArray) {
            typeName = options.getArrayTemplate().replace("%t", typeName);
        }
        return typeName;
    }
//
//    public static boolean isUnionSame(List<ColumnDataSourceDbo> part1, List<ColumnDataSourceDbo> part2, List<ColumnDataSourceDbo> list2)
//    {
//        List<ColumnDataSourceDbo> list1 = new Vector<>(part1);
//        for (ColumnDataSourceDbo col : part2) {
//            if (!list1.contains(col)) {
//                list1.add(col);
//            }
//        }
//        if (list1.size() != list2.size()) {
//            return false;
//        }
//        list1.sort((o1, o2) -> o1.getName().compareTo(o2.getName()));
//        list2.sort((o1, o2) -> o1.getName().compareTo(o2.getName()));
//        return list1.equals(list2);
//    }

    public static DataSourceDbo convertOptions(GenerateOptions options, TypesCastOptions types)
    {
        String dataSourceName = options.getSelection().getSource().getName();
        DataSourceDbo dataSourceDbo = DataSourcesBusiness.getDataSourceDbo(dataSourceName);

        for (TableDataSourceDbo table : dataSourceDbo.getTables())
        {
            TableSelection tableSelection = options.getSelection().getTables().stream()
                    .filter(t -> t.getTable().getName().equals(table.getName()))
                    .findFirst().orElse(null);
            for (ColumnDataSourceDbo column : table.getColumns())
            {
                ColumnSelection columnSelection = tableSelection.getColumns().stream()
                        .filter(c -> c.getColumn().getName().equals(column.getName()))
                        .findFirst().orElse(null);
                column.setType(convertSqlType(column.getSqlType(), types));
                column.setTypeNotNull(types.getNonNullableTypes().contains(column.getType()));
                column.setSelected(columnSelection.isSelected());
            }
        }

        return dataSourceDbo;
    }

    public static TypesCastOptions loadTypesCast(String file) throws IOException
    {
        TypesCastOptions dbo = new TypesCastOptions();
        String data = Helper.readFile(file);

        JSONObject obj = new JSONObject(data);
        JSONObject objTypes = obj.getJSONObject("types");
        HashMap<String, HashMap<String, String>> map = new HashMap<>();

        for (String key : objTypes.keySet()) {
            HashMap<String, String> typeMap = new HashMap<>();
            String type = objTypes.optString(key);
            JSONObject typeObject = objTypes.optJSONObject(key);
            if (typeObject != null) {
                for (String subtype : typeObject.keySet()) {
                    typeMap.put(subtype, typeObject.getString(subtype));
                }
            }
            else if (type != null) {
                typeMap.put("*", type);
            }
            map.put(key, typeMap);
        }
        dbo.setTypes(map);

        List<String> nonNullableTypes = new Vector<>();
        JSONArray array = obj.getJSONArray("non-nullable-types");
        for (int i = 0; i < array.length(); ++i) {
            nonNullableTypes.add(array.getString(i));
        }
        dbo.setNonNullableTypes(nonNullableTypes);

        dbo.setArrayTemplate(obj.getString("arrayTemplate"));

        return dbo;
    }

    public static void generateFile(String templatePath, String outputFile, DataSourceDbo dataSource, TableDataSourceDbo table) throws IOException
    {
        String data = Helper.readFile(templatePath);

        FileOutputStream file = new FileOutputStream(outputFile);

        JtwigTemplate template = JtwigTemplate.inlineTemplate(data);
        JtwigModel model = JtwigModel.newModel().with("dataSource", dataSource).with("table", table);

        template.render(model, file);

        file.close();
    }

    public static void generate(GenerateOptions options, Project project) throws IOException
    {
        DataSourcesBusiness.getDataSourcesDbo();
        String modelsAbsolutePath = Helper.getAbsolutePath(project, options.getModelsRelativePath());
        String dataSourceTemplateAbsolutePath = Helper.getAbsolutePath(project, options.getDataSourceTemplateRelativePath());
        String modelsTemplateAbsolutePath = Helper.getAbsolutePath(project, options.getModelsTemplateRelativePath());
        String typesCastAbsolutePath = Helper.getAbsolutePath(project, options.getCastFileRelativePath());
        String dataSourceAbsolutePath = Helper.getAbsolutePath(project, options.getDataSourceRelativePath());

        TypesCastOptions types = loadTypesCast(typesCastAbsolutePath);

        DataSourceDbo dbo = convertOptions(options, types);

        generateFile(dataSourceTemplateAbsolutePath, dataSourceAbsolutePath, dbo, null);
        for (TableDataSourceDbo table : dbo.getTables()) {
            if (table.hasAny()) {
                String filename = modelsAbsolutePath + File.separator + table.getName() + "." + options.getFilesExtension();
                generateFile(modelsTemplateAbsolutePath, filename, dbo, table);
            }
        }
    }
}