package eu.old.eudat.migration;

import eu.eudat.commons.JsonHandlingService;
import eu.eudat.convention.ConventionService;
import org.apache.commons.lang3.StringEscapeUtils;
import org.springframework.stereotype.Service;

@Service
public class MigrationTools {

	private final JsonHandlingService jsonHandlingService;

	private final ConventionService conventionService;

	public MigrationTools(JsonHandlingService jsonHandlingService, ConventionService conventionService) {
		this.jsonHandlingService = jsonHandlingService;
		this.conventionService = conventionService;
	}

	public <T> T tryParseJsonAsObjectString(Class<T> type, String value){
		T item = this.jsonHandlingService.fromJsonSafe(type, value);
		if (item == null) item = this.jsonHandlingService.fromJsonSafe(type, StringEscapeUtils.unescapeJava(value));
		if (item == null) item = this.jsonHandlingService.fromJsonSafe(type, StringEscapeUtils.unescapeJson(value));
		if (item == null) {
			String newValue = StringEscapeUtils.unescapeJava(value);
			newValue = newValue.trim().replace("[\"{", "[{");
			newValue = newValue.trim().replace("}\"]", "}]");
			newValue = newValue.trim().replace("}\", \"{", "}, {");
			newValue = newValue.trim().replace("}\",\"{", "},{");
			newValue = newValue.trim().replace(", \"{", ", {");
			newValue = newValue.trim().replace(",\"{", ",{");
			newValue = newValue.trim().replace("}\",", "},");

			while (!this.conventionService.isNullOrEmpty(newValue) && newValue.startsWith("\"")) newValue = newValue.substring(1);
			while (!this.conventionService.isNullOrEmpty(newValue) && newValue.endsWith("\"")) newValue = newValue.substring(0, newValue.length() - 1);
			item = this.jsonHandlingService.fromJsonSafe(type, newValue);
		}
		if (item == null) {
			String newValue = StringEscapeUtils.unescapeJson(value);
			newValue = newValue.trim().replace("[\"{", "[{");
			newValue = newValue.trim().replace("}\"]", "}]");
			newValue = newValue.trim().replace("}\", \"{", "}, {");
			newValue = newValue.trim().replace("}\",\"{", "},{");
			newValue = newValue.trim().replace(", \"{", ", {");
			newValue = newValue.trim().replace(",\"{", ",{");
			newValue = newValue.trim().replace("}\",", "},");

			while (!this.conventionService.isNullOrEmpty(newValue) && newValue.startsWith("\"")) newValue = newValue.substring(1);
			while (!this.conventionService.isNullOrEmpty(newValue) && newValue.endsWith("\"")) newValue = newValue.substring(0, newValue.length() - 1);
			item = this.jsonHandlingService.fromJsonSafe(type, newValue);
		}
		if (item == null) {
			String newValue = value.trim().replace("\\", "");
			newValue = newValue.trim().replace("[\"{", "[{");
			newValue = newValue.trim().replace("}\"]", "}]");
			newValue = newValue.trim().replace("}\", \"{", "}, {");
			newValue = newValue.trim().replace("}\",\"{", "},{");
			newValue = newValue.trim().replace(", \"{", ", {");
			newValue = newValue.trim().replace(",\"{", ",{");
			newValue = newValue.trim().replace("}\",", "},");

			while (!this.conventionService.isNullOrEmpty(newValue) && newValue.startsWith("\"")) newValue = newValue.substring(1);
			while (!this.conventionService.isNullOrEmpty(newValue) && newValue.endsWith("\"")) newValue = newValue.substring(0, newValue.length() - 1);
			item = this.jsonHandlingService.fromJsonSafe(type, newValue);
		}
		if (item == null) {
			String newValue = value.trim().replace("=", ":");
			newValue = newValue.trim().replace("{", "{\"");
			newValue = newValue.trim().replace("}", "\"}");
			newValue = newValue.trim().replace(":", "\":\"");
			newValue = newValue.trim().replace(", ", "\", \"");
			newValue = newValue.trim().replace("}\", \"{", "}, {");
			newValue = newValue.trim().replace("\"\"", "\"");
			newValue = newValue.trim().replace(":\"null,", ":null,");
			newValue = newValue.trim().replace(":\"null\",", ":null,");
			newValue = newValue.trim().replace(":\"null\"", ":null");
			newValue = newValue.trim().replace(":\"null}\"", ":null}");
			newValue = newValue.trim().replace("https\":\"", "https:");
			newValue = newValue.trim().replace("datarepo\":\"", "datarepo:");

			item = this.jsonHandlingService.fromJsonSafe(type, newValue);
		}
		return item;
	}

	public String cleanTagString(String value){
		value = value.trim().replace("=", ":");
		value = value.trim().replace("{", "{\"");
		value = value.trim().replace("}", "\"}");
		value = value.trim().replace(":", "\":\"");
		value = value.trim().replace(", ", "\", \"");
		value = value.trim().replace("}\", \"{", "}, {");
		return value;
	}
}