/**
 * Startup script: Indexes TinaCMS content into the database (Redis).
 *
 * In a self-hosted setup, the database (Redis) starts empty.
 * This script reads the generated schema files from the filesystem,
 * creates a database connection, and indexes all content into Redis.
 *
 * Run this BEFORE starting the Next.js server.
 */
import fs from "node:fs";
import path from "node:path";
import { createRequire } from "node:module";
import {
    createDatabase,
    FilesystemBridge,
} from "@tinacms/datalayer";

const require = createRequire(import.meta.url);
const { RedisLevel } = require("upstash-redis-level");

const branch = process.env.TINA_GIT_BRANCH || "main";
const kvUrl = process.env.KV_REST_API_URL;
const kvToken = process.env.KV_REST_API_TOKEN;

if (!kvUrl || !kvToken) {
    console.error(
        "[index-database] KV_REST_API_URL and KV_REST_API_TOKEN are required"
    );
    process.exit(1);
}

const generatedDir = path.join(process.cwd(), "tina", "__generated__");

const graphqlPath = path.join(generatedDir, "_graphql.json");
const schemaPath = path.join(generatedDir, "_schema.json");
const lookupPath = path.join(generatedDir, "_lookup.json");

// Verify generated files exist
for (const filePath of [graphqlPath, schemaPath, lookupPath]) {
    if (!fs.existsSync(filePath)) {
        console.error(`[index-database] Missing generated file: ${filePath}`);
        process.exit(1);
    }
}

const graphQLSchema = JSON.parse(fs.readFileSync(graphqlPath, "utf-8"));
const tinaSchema = JSON.parse(fs.readFileSync(schemaPath, "utf-8"));
const lookup = JSON.parse(fs.readFileSync(lookupPath, "utf-8"));

// A no-op git provider since we only need to index, not push
const noopGitProvider = {
    onPut: async () => { },
    onDelete: async () => { },
};

const database = createDatabase({
    gitProvider: noopGitProvider,
    databaseAdapter: new RedisLevel({
        redis: { url: kvUrl, token: kvToken },
        debug: process.env.DEBUG === "true" || false,
    }),
    bridge: new FilesystemBridge(process.cwd()),
    namespace: branch,
});

async function indexContent() {
    console.log("[index-database] Starting content indexing...");
    const startTime = Date.now();

    try {
        await database.indexContent({
            graphQLSchema,
            tinaSchema: { schema: tinaSchema },
            lookup,
        });

        const elapsed = Date.now() - startTime;
        console.log(
            `[index-database] Content indexed successfully in ${elapsed}ms`
        );
    } catch (error) {
        console.error("[index-database] Failed to index content:", error);
        process.exit(1);
    }
}

indexContent();