import { promises as fs } from "fs";
import { pathToFileURL } from "node:url";
import svgLoader from "vite-svg-loader";
import { resolve, basename, relative } from "pathe";
import { defineNuxtConfig } from "nuxt/config";
import { $fetch } from "ofetch";
import { globIterate } from "glob";
import { match as matchLocale } from "@formatjs/intl-localematcher";
import { consola } from "consola";

const STAGING_API_URL = "https://staging-api.modrinth.com/v2/";

const preloadedFonts = [
  "inter/Inter-Regular.woff2",
  "inter/Inter-Medium.woff2",
  "inter/Inter-SemiBold.woff2",
  "inter/Inter-Bold.woff2",
];

const favicons = {
  "(prefers-color-scheme:no-preference)": "/favicon-light.ico",
  "(prefers-color-scheme:light)": "/favicon-light.ico",
  "(prefers-color-scheme:dark)": "/favicon.ico",
};

/**
 * Tags of locales that are auto-discovered besides the default locale.
 *
 * Preferably only the locales that reach a certain threshold of complete
 * translations would be included in this array.
 */
const enabledLocales: string[] = [];

/**
 * Overrides for the categories of the certain locales.
 */
const localesCategoriesOverrides: Partial<Record<string, "fun" | "experimental">> = {
  "en-x-pirate": "fun",
  "en-x-updown": "fun",
  "en-x-lolcat": "fun",
  "en-x-uwu": "fun",
  "ru-x-bandit": "fun",
  ar: "experimental",
  he: "experimental",
  pes: "experimental",
};

export default defineNuxtConfig({
  srcDir: "src/",
  app: {
    head: {
      htmlAttrs: {
        lang: "en",
      },
      title: "Modrinth",
      link: [
        // The type is necessary because the linter can't always compare this very nested/complex type on itself
        ...preloadedFonts.map((font): object => {
          return {
            rel: "preload",
            href: `https://cdn-raw.modrinth.com/fonts/${font}?v=3.19`,
            as: "font",
            type: "font/woff2",
            crossorigin: "anonymous",
          };
        }),
        ...Object.entries(favicons).map(([media, href]): object => {
          return { rel: "icon", type: "image/x-icon", href, media };
        }),
        ...Object.entries(favicons).map(([media, href]): object => {
          return { rel: "apple-touch-icon", type: "image/x-icon", href, media, sizes: "64x64" };
        }),
        {
          rel: "search",
          type: "application/opensearchdescription+xml",
          href: "/opensearch.xml",
          title: "Modrinth mods",
        },
      ],
    },
  },
  vite: {
    define: {
      global: {},
    },
    esbuild: {
      define: {
        global: "globalThis",
      },
    },
    cacheDir: "../../node_modules/.vite/apps/knossos",
    resolve: {
      dedupe: ["vue"],
    },
    plugins: [
      svgLoader({
        svgoConfig: {
          plugins: [
            {
              name: "preset-default",
              params: {
                overrides: {
                  removeViewBox: false,
                },
              },
            },
          ],
        },
      }),
    ],
  },
  hooks: {
    async "build:before"() {
      // 30 minutes
      const TTL = 30 * 60 * 1000;

      let state: {
        lastGenerated?: string;
        apiUrl?: string;
        categories?: any[];
        loaders?: any[];
        gameVersions?: any[];
        donationPlatforms?: any[];
        reportTypes?: any[];
        homePageProjects?: any[];
        homePageSearch?: any[];
        homePageNotifs?: any[];
        products?: any[];
        errors?: number[];
      } = {};

      try {
        state = JSON.parse(await fs.readFile("./src/generated/state.json", "utf8"));
      } catch {
        // File doesn't exist, create folder
        await fs.mkdir("./src/generated", { recursive: true });
      }

      const API_URL = getApiUrl();

      if (
        // Skip regeneration if within TTL...
        state.lastGenerated &&
        new Date(state.lastGenerated).getTime() + TTL > new Date().getTime() &&
        // ...but only if the API URL is the same
        state.apiUrl === API_URL
      ) {
        return;
      }

      state.lastGenerated = new Date().toISOString();

      state.apiUrl = API_URL;

      const headers = {
        headers: {
          "user-agent": "Knossos generator (support@modrinth.com)",
        },
      };

      const caughtErrorCodes = new Set<number>();

      function handleFetchError(err: any, defaultValue: any) {
        console.error("Error generating state: ", err);
        caughtErrorCodes.add(err.status);
        return defaultValue;
      }

      const [
        categories,
        loaders,
        gameVersions,
        donationPlatforms,
        reportTypes,
        homePageProjects,
        homePageSearch,
        homePageNotifs,
        products,
      ] = await Promise.all([
        $fetch(`${API_URL}tag/category`, headers).catch((err) => handleFetchError(err, [])),
        $fetch(`${API_URL}tag/loader`, headers).catch((err) => handleFetchError(err, [])),
        $fetch(`${API_URL}tag/game_version`, headers).catch((err) => handleFetchError(err, [])),
        $fetch(`${API_URL}tag/donation_platform`, headers).catch((err) =>
          handleFetchError(err, []),
        ),
        $fetch(`${API_URL}tag/report_type`, headers).catch((err) => handleFetchError(err, [])),
        $fetch(`${API_URL}projects_random?count=60`, headers).catch((err) =>
          handleFetchError(err, []),
        ),
        $fetch(`${API_URL}search?limit=3&query=leave&index=relevance`, headers).catch((err) =>
          handleFetchError(err, {}),
        ),
        $fetch(`${API_URL}search?limit=3&query=&index=updated`, headers).catch((err) =>
          handleFetchError(err, {}),
        ),
        $fetch(`${API_URL.replace("/v2/", "/_internal/")}billing/products`, headers).catch((err) =>
          handleFetchError(err, []),
        ),
      ]);

      state.categories = categories;
      state.loaders = loaders;
      state.gameVersions = gameVersions;
      state.donationPlatforms = donationPlatforms;
      state.reportTypes = reportTypes;
      state.homePageProjects = homePageProjects;
      state.homePageSearch = homePageSearch;
      state.homePageNotifs = homePageNotifs;
      state.products = products;
      state.errors = [...caughtErrorCodes];

      await fs.writeFile("./src/generated/state.json", JSON.stringify(state));

      console.log("Tags generated!");
    },
    "pages:extend"(routes) {
      routes.splice(
        routes.findIndex((x) => x.name === "search-searchProjectType"),
        1,
      );

      const types = ["mods", "modpacks", "plugins", "resourcepacks", "shaders", "datapacks"];

      types.forEach((type) =>
        routes.push({
          name: `search-${type}`,
          path: `/${type}`,
          file: resolve(__dirname, "src/pages/search/[searchProjectType].vue"),
          children: [],
        }),
      );
    },
    async "vintl:extendOptions"(opts) {
      opts.locales ??= [];

      const isProduction = getDomain() === "https://modrinth.com";

      const resolveCompactNumberDataImport = await (async () => {
        const compactNumberLocales: string[] = [];

        for await (const localeFile of globIterate(
          "node_modules/@vintl/compact-number/dist/locale-data/*.mjs",
          { ignore: "**/*.data.mjs" },
        )) {
          const tag = basename(localeFile, ".mjs");
          compactNumberLocales.push(tag);
        }

        function resolveImport(tag: string) {
          const matchedTag = matchLocale([tag], compactNumberLocales, "en-x-placeholder");
          return matchedTag === "en-x-placeholder"
            ? undefined
            : `@vintl/compact-number/locale-data/${matchedTag}`;
        }

        return resolveImport;
      })();

      const resolveOmorphiaLocaleImport = await (async () => {
        const omorphiaLocales: string[] = [];
        const omorphiaLocaleSets = new Map<string, { files: { from: string }[] }>();

        for await (const localeDir of globIterate("node_modules/@modrinth/ui/src/locales/*", {
          posix: true,
        })) {
          const tag = basename(localeDir);
          omorphiaLocales.push(tag);

          const localeFiles: { from: string; format?: string }[] = [];

          omorphiaLocaleSets.set(tag, { files: localeFiles });

          for await (const localeFile of globIterate(`${localeDir}/*`, { posix: true })) {
            localeFiles.push({
              from: pathToFileURL(localeFile).toString(),
              format: "default",
            });
          }
        }

        return function resolveLocaleImport(tag: string) {
          return omorphiaLocaleSets.get(matchLocale([tag], omorphiaLocales, "en-x-placeholder"));
        };
      })();

      for await (const localeDir of globIterate("src/locales/*/", { posix: true })) {
        const tag = basename(localeDir);
        if (isProduction && !enabledLocales.includes(tag) && opts.defaultLocale !== tag) continue;

        const locale =
          opts.locales.find((locale) => locale.tag === tag) ??
          opts.locales[opts.locales.push({ tag }) - 1]!;

        const localeFiles = (locale.files ??= []);

        for await (const localeFile of globIterate(`${localeDir}/*`, { posix: true })) {
          const fileName = basename(localeFile);
          if (fileName === "index.json") {
            localeFiles.push({
              from: `./${relative("./src", localeFile)}`,
              format: "crowdin",
            });
          } else if (fileName === "meta.json") {
            const meta: Record<string, { message: string }> = await fs
              .readFile(localeFile, "utf8")
              .then((date) => JSON.parse(date));
            const localeMeta = (locale.meta ??= {});
            for (const key in meta) {
              const value = meta[key];
              if (value === undefined) continue;
              localeMeta[key] = value.message;
            }
          } else {
            (locale.resources ??= {})[fileName] = `./${relative("./src", localeFile)}`;
          }
        }

        const categoryOverride = localesCategoriesOverrides[tag];
        if (categoryOverride != null) {
          (locale.meta ??= {}).category = categoryOverride;
        }

        const omorphiaLocaleData = resolveOmorphiaLocaleImport(tag);
        if (omorphiaLocaleData != null) {
          localeFiles.push(...omorphiaLocaleData.files);
        }

        const cnDataImport = resolveCompactNumberDataImport(tag);
        if (cnDataImport != null) {
          (locale.additionalImports ??= []).push({
            from: cnDataImport,
            resolve: false,
          });
        }
      }
    },
  },
  runtimeConfig: {
    // @ts-ignore
    apiBaseUrl: process.env.BASE_URL ?? globalThis.BASE_URL ?? getApiUrl(),
    // @ts-ignore
    rateLimitKey: process.env.RATE_LIMIT_IGNORE_KEY ?? globalThis.RATE_LIMIT_IGNORE_KEY,
    pyroBaseUrl: process.env.PYRO_BASE_URL,
    public: {
      apiBaseUrl: getApiUrl(),
      pyroBaseUrl: process.env.PYRO_BASE_URL,
      siteUrl: getDomain(),
      production: isProduction(),
      featureFlagOverrides: getFeatureFlagOverrides(),

      owner: process.env.VERCEL_GIT_REPO_OWNER || "modrinth",
      slug: process.env.VERCEL_GIT_REPO_SLUG || "code",
      branch:
        process.env.VERCEL_GIT_COMMIT_REF ||
        process.env.CF_PAGES_BRANCH ||
        // @ts-ignore
        globalThis.CF_PAGES_BRANCH ||
        "master",
      hash:
        process.env.VERCEL_GIT_COMMIT_SHA ||
        process.env.CF_PAGES_COMMIT_SHA ||
        // @ts-ignore
        globalThis.CF_PAGES_COMMIT_SHA ||
        "unknown",

      stripePublishableKey:
        process.env.STRIPE_PUBLISHABLE_KEY ||
        globalThis.STRIPE_PUBLISHABLE_KEY ||
        "pk_test_51JbFxJJygY5LJFfKV50mnXzz3YLvBVe2Gd1jn7ljWAkaBlRz3VQdxN9mXcPSrFbSqxwAb0svte9yhnsmm7qHfcWn00R611Ce7b",
    },
  },
  typescript: {
    shim: false,
    strict: true,
    typeCheck: false,
    tsConfig: {
      compilerOptions: {
        moduleResolution: "bundler",
        allowImportingTsExtensions: true,
      },
    },
  },
  modules: ["@vintl/nuxt", "@pinia/nuxt"],
  vintl: {
    defaultLocale: "en-US",
    locales: [
      {
        tag: "en-US",
        meta: {
          static: {
            iso: "en",
          },
        },
      },
    ],
    storage: "cookie",
    parserless: "only-prod",
    seo: {
      defaultLocaleHasParameter: false,
    },
    onParseError({ error, message, messageId, moduleId, parseMessage, parserOptions }) {
      const errorMessage = String(error);
      const modulePath = relative(__dirname, moduleId);

      try {
        const fallback = parseMessage(message, { ...parserOptions, ignoreTag: true });

        consola.warn(
          `[i18n] ${messageId} in ${modulePath} cannot be parsed normally due to ${errorMessage}. The tags will will not be parsed.`,
        );

        return fallback;
      } catch (err) {
        const secondaryErrorMessage = String(err);

        const reason =
          errorMessage === secondaryErrorMessage
            ? errorMessage
            : `${errorMessage} and ${secondaryErrorMessage}`;

        consola.warn(
          `[i18n] ${messageId} in ${modulePath} cannot be parsed due to ${reason}. It will be skipped.`,
        );
      }
    },
  },
  nitro: {
    moduleSideEffects: ["@vintl/compact-number/locale-data"],
  },
  devtools: {
    enabled: true,
  },
  css: ["~/assets/styles/tailwind.css"],
  postcss: {
    plugins: {
      tailwindcss: {},
      autoprefixer: {},
    },
  },
  routeRules: {
    "/**": {
      headers: {
        "Accept-CH": "Sec-CH-Prefers-Color-Scheme",
        "Critical-CH": "Sec-CH-Prefers-Color-Scheme",
      },
    },
  },
  compatibilityDate: "2024-07-03",
  telemetry: false,
});

function getApiUrl() {
  // @ts-ignore
  return process.env.BROWSER_BASE_URL ?? globalThis.BROWSER_BASE_URL ?? STAGING_API_URL;
}

function isProduction() {
  return process.env.NODE_ENV === "production";
}

function getFeatureFlagOverrides() {
  return JSON.parse(process.env.FLAG_OVERRIDES ?? "{}");
}

function getDomain() {
  if (process.env.NODE_ENV === "production") {
    if (process.env.SITE_URL) {
      return process.env.SITE_URL;
    }
    // @ts-ignore
    else if (process.env.CF_PAGES_URL || globalThis.CF_PAGES_URL) {
      // @ts-ignore
      return process.env.CF_PAGES_URL ?? globalThis.CF_PAGES_URL;
    } else if (process.env.HEROKU_APP_NAME) {
      return `https://${process.env.HEROKU_APP_NAME}.herokuapp.com`;
    } else if (process.env.VERCEL_URL) {
      return `https://${process.env.VERCEL_URL}`;
    } else if (getApiUrl() === STAGING_API_URL) {
      return "https://staging.modrinth.com";
    } else {
      return "https://modrinth.com";
    }
  } else {
    const port = process.env.PORT || 3000;
    return `http://localhost:${port}`;
  }
}