import * as url from "url";
import * as fs from "fs";
import { join as pathJoin, dirname as pathDirname } from "path";

export function generateJavaStackFiles(params: { version: string; themeName: string; homepage?: string; keycloakThemeBuildingDirPath: string }): {
    jarFilePath: string;
} {
    const { themeName, version, homepage, keycloakThemeBuildingDirPath } = params;

    {
        const { pomFileCode } = (function generatePomFileCode(): {
            pomFileCode: string;
        } {
            const groupId = (() => {
                const fallbackGroupId = `there.was.no.homepage.field.in.the.package.json.${themeName}`;

                return (
                    (!homepage
                        ? fallbackGroupId
                        : url
                              .parse(homepage)
                              .host?.replace(/:[0-9]+$/, "")
                              ?.split(".")
                              .reverse()
                              .join(".") ?? fallbackGroupId) + ".keycloak"
                );
            })();

            const artefactId = `${themeName}-keycloak-theme`;

            const pomFileCode = [
                `<?xml version="1.0"?>`,
                `<project xmlns="http://maven.apache.org/POM/4.0.0"`,
                `	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"`,
                `	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">`,
                `	<modelVersion>4.0.0</modelVersion>`,
                `	<groupId>${groupId}</groupId>`,
                `	<artifactId>${artefactId}</artifactId>`,
                `	<version>${version}</version>`,
                `	<name>${artefactId}</name>`,
                `	<description />`,
                `</project>`,
            ].join("\n");

            return { pomFileCode };
        })();

        fs.writeFileSync(pathJoin(keycloakThemeBuildingDirPath, "pom.xml"), Buffer.from(pomFileCode, "utf8"));
    }

    {
        const themeManifestFilePath = pathJoin(keycloakThemeBuildingDirPath, "src", "main", "resources", "META-INF", "keycloak-themes.json");

        try {
            fs.mkdirSync(pathDirname(themeManifestFilePath));
        } catch {}

        fs.writeFileSync(
            themeManifestFilePath,
            Buffer.from(
                JSON.stringify(
                    {
                        "themes": [
                            {
                                "name": themeName,
                                "types": ["login"],
                            },
                        ],
                    },
                    null,
                    2,
                ),
                "utf8",
            ),
        );
    }

    return {
        "jarFilePath": pathJoin(keycloakThemeBuildingDirPath, "target", `${themeName}-${version}.jar`),
    };
}