package com.bsmlab.dfx.agent.config;

import com.bsmlab.dfx.agent.config.datasource.DataSourceDto;
import com.bsmlab.dfx.agent.task.dropbox.DropBoxDto;
import com.fasterxml.jackson.databind.DatabindException;
import com.fasterxml.jackson.databind.ObjectMapper;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.ObjectUtils;
import org.springframework.core.io.InputStreamResource;
import org.springframework.core.io.Resource;
import org.springframework.stereotype.Component;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

@Slf4j
@Component
public class Settings {
    private final Map<String, DataSourceDto> dataSourceDtoMap = new HashMap<>();
    private Map<String, DropBoxDto> dropBoxDtoMap = new HashMap<>();
    private Resource[] mapperLocations;
    public void loadSettingFile(String settingFilePath) {
        try {
            ObjectMapper objectMapper = new ObjectMapper();
            Map<String, Object> settingMap = objectMapper.readValue(new File(settingFilePath), Map.class);
            this.mapperLocations = this.createMapperLocations(settingMap);
            log.debug("settingMap: {}", settingMap);
            this.parseDataSources(settingMap);
            this.parseDropBoxes(settingMap);
        } catch (DatabindException e) {
            log.error("cannot parse a setting file. {}", settingFilePath, e);
            log.error(e.getMessage(), e);
        } catch (IOException e) {
            log.error("cannot read a setting file. {}", settingFilePath);
            log.error(e.getMessage(), e);
        }
    }

    @SuppressWarnings("unchecked")
    private void parseDataSources(Map<String, Object> settingMap) {
        List<Map<String, String>> dataSourceMapList = (List<Map<String, String>>)settingMap.get("datasource");
        for(Map<String, String> dataSourceMap : dataSourceMapList) {
            DataSourceDto dataSourceDto = DataSourceDto.builder()
                    .dataSourceId(dataSourceMap.get("dataSourceId")).driverClassName(dataSourceMap.get("driverClassName"))
                    .url(dataSourceMap.get("url")).username(dataSourceMap.get("username")).password(dataSourceMap.get("password"))
                    .build();
            dataSourceDtoMap.put(dataSourceDto.getDataSourceId(), dataSourceDto);
        }
    }

    private Resource[] createMapperLocations(Map<String, Object> settingMap) throws FileNotFoundException {
        Resource[] resources = null;
        if(ObjectUtils.isNotEmpty(settingMap.get("mapperLocations"))) {
            String[] locationStringList = (String[])settingMap.get("mapperLocations");
            resources = new Resource[locationStringList.length];
            int i = 0;
            for(String location : locationStringList) {
                resources[i] = new InputStreamResource(new FileInputStream(new File(location)));
                i++;
            }
        }
        return resources;
    }

    @SuppressWarnings("unchecked")
    private void parseDropBoxes(Map<String, Object> settingMap) {
        List<Map<String, String>> dropBoxMapList = (List<Map<String, String>>)settingMap.get("drop-box");
        //TODO drop-box parser 개발
        //TODO drop-box executor 개발
        for(Map<String, String> dropBoxMap : dropBoxMapList) {
            DropBoxDto dataSourceDto = DropBoxDto.builder()
                    .build();
            this.dropBoxDtoMap.put("", null);
        }
    }

    public Resource[] getMapperLocations() {
        return this.mapperLocations;
    }

    public Map<String, DataSourceDto> getDataSourceDtoMap() {
        return this.dataSourceDtoMap;
    }

    private Map<String, DropBoxDto> getDropBoxDtoMap() {
        return this.dropBoxDtoMap;
    }
}