import { transformCodebase } from "../tools/transformCodebase";
import * as fs from "fs";
import { join as pathJoin, basename as pathBasename } 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;
    keycloakThemeEmailDirPath: string;
    urlPathname: string;
    //If urlOrigin is not undefined then it means --externals-assets
    urlOrigin: undefined | string;
    extraPagesId: string[];
    extraThemeProperties: string[];
    keycloakVersion: string;
    baseAuthenticationUrl: string;
}): { doBundleEmailTemplate: boolean } {
    const {
        themeName,
        reactAppBuildDirPath,
        keycloakThemeBuildingDirPath,
        keycloakThemeEmailDirPath,
        urlPathname,
        urlOrigin,
        extraPagesId,
        extraThemeProperties,
        keycloakVersion,
        baseAuthenticationUrl,
    } = 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;
        },
    });

    let doBundleEmailTemplate: boolean;

    email: {
        if (!fs.existsSync(keycloakThemeEmailDirPath)) {
            console.log(
                [
                    `Not bundling email template because ${pathBasename(keycloakThemeEmailDirPath)} does not exist`,
                    `To start customizing the email template, run: 👉 npx create-keycloak-email-directory 👈`,
                ].join("\n"),
            );
            doBundleEmailTemplate = false;
            break email;
        }

        doBundleEmailTemplate = true;

        transformCodebase({
            "srcDirPath": keycloakThemeEmailDirPath,
            "destDirPath": pathJoin(themeDirPath, "..", "email"),
        });
    }

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

    [...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": pathJoin(tmpDirPath, "keycloak", "common", "resources"),
            "destDirPath": pathJoin(themeResourcesDirPath, pathBasename(resourcesCommonPath)),
        });

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

        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 run a Keycloak container"].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"),
    );

    return { doBundleEmailTemplate };
}