import { transformCodebase } from "../tools/transformCodebase";
import * as fs from "fs";
import { join as pathJoin } from "path";
import {
    replaceImportsInCssCode,
    replaceImportsFromStaticInJsCode,
} from "./replaceImportFromStatic";
import { generateFtlFilesCodeFactory, pageIds } from "./generateFtl";
import { downloadBuiltinKeycloakTheme } from "../download-builtin-keycloak-theme";
import * as child_process from "child_process";
import {
    resourcesCommonPath,
    resourcesPath,
    subDirOfPublicDirBasename,
} from "../../lib/getKcContext/kcContextMocks/urlResourcesPath";
import { isInside } from "../tools/isInside";

export function generateKeycloakThemeResources(params: {
    themeName: string;
    reactAppBuildDirPath: string;
    keycloakThemeBuildingDirPath: string;
    urlPathname: string;
    //If urlOrigin is not undefined then it means --externals-assets
    urlOrigin: undefined | string;
    extraPagesId: string[];
    extraThemeProperties: string[];
    keycloakVersion: "11.0.3" | "15.0.2";
}) {
    const {
        themeName,
        reactAppBuildDirPath,
        keycloakThemeBuildingDirPath,
        urlPathname,
        urlOrigin,
        extraPagesId,
        extraThemeProperties,
        keycloakVersion,
    } = params;

    const themeDirPath = pathJoin(
        keycloakThemeBuildingDirPath,
        "src",
        "main",
        "resources",
        "theme",
        themeName,
        "login",
    );

    let allCssGlobalsToDefine: Record<string, string> = {};

    transformCodebase({
        "destDirPath":
            urlOrigin === undefined
                ? pathJoin(themeDirPath, "resources", "build")
                : reactAppBuildDirPath,
        "srcDirPath": reactAppBuildDirPath,
        "transformSourceCode": ({ filePath, sourceCode }) => {
            //NOTE: Prevent cycles, excludes the folder we generated for debug in public/
            if (
                urlOrigin === undefined &&
                isInside({
                    "dirPath": pathJoin(
                        reactAppBuildDirPath,
                        subDirOfPublicDirBasename,
                    ),
                    filePath,
                })
            ) {
                return undefined;
            }

            if (urlOrigin === undefined && /\.css?$/i.test(filePath)) {
                const { cssGlobalsToDefine, fixedCssCode } =
                    replaceImportsInCssCode({
                        "cssCode": sourceCode.toString("utf8"),
                    });

                allCssGlobalsToDefine = {
                    ...allCssGlobalsToDefine,
                    ...cssGlobalsToDefine,
                };

                return {
                    "modifiedSourceCode": Buffer.from(fixedCssCode, "utf8"),
                };
            }

            if (/\.js?$/i.test(filePath)) {
                const { fixedJsCode } = replaceImportsFromStaticInJsCode({
                    "jsCode": sourceCode.toString("utf8"),
                    urlOrigin,
                });

                return {
                    "modifiedSourceCode": Buffer.from(fixedJsCode, "utf8"),
                };
            }

            return urlOrigin === undefined
                ? { "modifiedSourceCode": sourceCode }
                : undefined;
        },
    });

    const { generateFtlFilesCode } = generateFtlFilesCodeFactory({
        "cssGlobalsToDefine": allCssGlobalsToDefine,
        "indexHtmlCode": fs
            .readFileSync(pathJoin(reactAppBuildDirPath, "index.html"))
            .toString("utf8"),
        urlPathname,
        urlOrigin,
    });

    [...pageIds, ...extraPagesId].forEach(pageId => {
        const { ftlCode } = generateFtlFilesCode({ pageId });

        fs.mkdirSync(themeDirPath, { "recursive": true });

        fs.writeFileSync(
            pathJoin(themeDirPath, pageId),
            Buffer.from(ftlCode, "utf8"),
        );
    });

    {
        const tmpDirPath = pathJoin(themeDirPath, "..", "tmp_xxKdLpdIdLd");

        downloadBuiltinKeycloakTheme({
            keycloakVersion,
            "destDirPath": tmpDirPath,
        });

        const themeResourcesDirPath = pathJoin(themeDirPath, "resources");

        transformCodebase({
            "srcDirPath": pathJoin(
                tmpDirPath,
                "keycloak",
                "login",
                "resources",
            ),
            "destDirPath": themeResourcesDirPath,
        });

        const reactAppPublicDirPath = pathJoin(
            reactAppBuildDirPath,
            "..",
            "public",
        );

        transformCodebase({
            "srcDirPath": themeResourcesDirPath,
            "destDirPath": pathJoin(reactAppPublicDirPath, resourcesPath),
        });

        transformCodebase({
            "srcDirPath": pathJoin(
                tmpDirPath,
                "keycloak",
                "common",
                "resources",
            ),
            "destDirPath": pathJoin(reactAppPublicDirPath, resourcesCommonPath),
        });

        const keycloakResourcesWithinPublicDirPath = pathJoin(
            reactAppPublicDirPath,
            subDirOfPublicDirBasename,
        );

        fs.writeFileSync(
            pathJoin(keycloakResourcesWithinPublicDirPath, "README.txt"),
            Buffer.from(
                [
                    "This is just a test folder that helps develop",
                    "the login and register page without having to yarn build",
                ].join(" "),
            ),
        );

        fs.writeFileSync(
            pathJoin(keycloakResourcesWithinPublicDirPath, ".gitignore"),
            Buffer.from("*", "utf8"),
        );

        child_process.execSync(`rm -r ${tmpDirPath}`);
    }

    fs.writeFileSync(
        pathJoin(themeDirPath, "theme.properties"),
        Buffer.from(
            "parent=keycloak".concat("\n\n", extraThemeProperties.join("\n\n")),
            "utf8",
        ),
    );
}