#!/usr/bin/env node

import { getThisCodebaseRootDirPath } from "./tools/getThisCodebaseRootDirPath";
import cliSelect from "cli-select";
import { loginThemePageIds, accountThemePageIds, type LoginThemePageId, type AccountThemePageId } from "./shared/pageIds";
import { capitalize } from "tsafe/capitalize";
import * as fs from "fs";
import { join as pathJoin, relative as pathRelative, dirname as pathDirname } from "path";
import { kebabCaseToCamelCase } from "./tools/kebabCaseToSnakeCase";
import { assert, Equals } from "tsafe/assert";
import { getThemeSrcDirPath } from "./shared/getThemeSrcDirPath";
import { themeTypes, type ThemeType } from "./shared/constants";
import type { CliCommandOptions } from "./main";
import { readBuildOptions } from "./shared/buildOptions";

export async function command(params: { cliCommandOptions: CliCommandOptions }) {
    const { cliCommandOptions } = params;

    const buildOptions = readBuildOptions({
        cliCommandOptions
    });

    console.log("Theme type:");

    const { value: themeType } = await cliSelect<ThemeType>({
        "values": [...themeTypes]
    }).catch(() => {
        console.log("Aborting");

        process.exit(-1);
    });

    console.log("Select the page you want to customize:");

    const { value: pageId } = await cliSelect<LoginThemePageId | AccountThemePageId>({
        "values": (() => {
            switch (themeType) {
                case "login":
                    return [...loginThemePageIds];
                case "account":
                    return [...accountThemePageIds];
            }
            assert<Equals<typeof themeType, never>>(false);
        })()
    }).catch(() => {
        console.log("Aborting");

        process.exit(-1);
    });

    const componentPageBasename = capitalize(kebabCaseToCamelCase(pageId)).replace(/ftl$/, "tsx");

    const { themeSrcDirPath } = getThemeSrcDirPath({ "reactAppRootDirPath": buildOptions.reactAppRootDirPath });

    const targetFilePath = pathJoin(themeSrcDirPath, themeType, "pages", componentPageBasename);

    if (fs.existsSync(targetFilePath)) {
        console.log(`${pageId} is already ejected, ${pathRelative(process.cwd(), targetFilePath)} already exists`);

        process.exit(-1);
    }

    {
        const targetDirPath = pathDirname(targetFilePath);

        if (!fs.existsSync(targetDirPath)) {
            fs.mkdirSync(targetDirPath, { "recursive": true });
        }
    }

    const componentPageContent = fs
        .readFileSync(pathJoin(getThisCodebaseRootDirPath(), "src", themeType, "pages", componentPageBasename))
        .toString("utf8");

    fs.writeFileSync(targetFilePath, Buffer.from(componentPageContent, "utf8"));

    const userProfileFormFieldComponentName = "UserProfileFormFields";

    console.log(
        [
            ``,
            `\`${pathJoin(".", pathRelative(process.cwd(), targetFilePath))}\` copy pasted from the Keycloakify source code into your project.`,
            ``,
            `You now need to update your page router:`,
            ``,
            `\`${pathJoin(".", pathRelative(process.cwd(), themeSrcDirPath), themeType, "KcApp.tsx")}\`:`,
            "```",
            `// ...`,
            ``,
            `+const ${componentPageBasename.replace(/.tsx$/, "")} = lazy(() => import("./pages/${componentPageBasename}"));`,
            ``,
            ` export default function KcApp(props: { kcContext: KcContext; }) {`,
            ``,
            `     // ...`,
            ``,
            `     return (`,
            `         <Suspense>`,
            `             {(() => {`,
            `                 switch (kcContext.pageId) {`,
            `                     // ...`,
            `                     case "${pageId}": return (`,
            `+                        <Login`,
            `+                            {...{ kcContext, i18n, classes }}`,
            `+                            Template={Template}`,
            ...(!componentPageContent.includes(userProfileFormFieldComponentName)
                ? []
                : [`+                            ${userProfileFormFieldComponentName}={${userProfileFormFieldComponentName}}`]),
            `+                            doUseDefaultCss={true}`,
            `+                        />`,
            `+                    );`,
            `                     default: return <Fallback /* .. */ />;`,
            `                 }`,
            `             })()}`,
            `         </Suspense>`,
            `     );`,
            ` }`,
            "```"
        ].join("\n")
    );
}