#! /usr/engine/env node
// @ts-check

const fs = require("fs");
const path = require("path");
const { execSync } = require("child_process");

require("dotenv").config({
    path: path.resolve(process.cwd(), ".env"),
});

const datasquirel = require("../index");
const createDbFromSchema = require("./engine/createDbFromSchema");

if (!fs.existsSync(path.resolve(process.cwd(), ".env"))) {
    console.log(".env file not found");
    process.exit();
}

const { DSQL_HOST, DSQL_USER, DSQL_PASS, DSQL_DB_NAME, DSQL_KEY, DSQL_REF_DB_NAME, DSQL_FULL_SYNC, DSQL_ENCRYPTION_KEY, DSQL_ENCRYPTION_SALT } = process.env;

if (!DSQL_HOST?.match(/./)) {
    console.log("DSQL_HOST is required in your `.env` file");
    process.exit();
}

if (!DSQL_USER?.match(/./)) {
    console.log("DSQL_USER is required in your `.env` file");
    process.exit();
}

if (!DSQL_PASS?.match(/./)) {
    console.log("DSQL_PASS is required in your `.env` file");
    process.exit();
}

const dbSchemaLocalFilePath = path.resolve(process.cwd(), "dsql.schema.json");

async function run() {
    let schemaData;

    if (DSQL_KEY && DSQL_REF_DB_NAME?.match(/./)) {
        const dbSchemaDataResponse = await datasquirel.getSchema({
            key: DSQL_KEY,
            database: DSQL_REF_DB_NAME || undefined,
        });

        if (!dbSchemaDataResponse.payload || Array.isArray(dbSchemaDataResponse.payload)) {
            console.log("DSQL_KEY+DSQL_REF_DB_NAME => Error in fetching DB schema");
            console.log(dbSchemaDataResponse);
            process.exit();
        }

        let fetchedDbSchemaObject = dbSchemaDataResponse.payload;
        if (DSQL_DB_NAME) fetchedDbSchemaObject.dbFullName = DSQL_DB_NAME;

        schemaData = [fetchedDbSchemaObject];
    } else if (DSQL_KEY) {
        const dbSchemaDataResponse = await datasquirel.getSchema({
            key: DSQL_KEY,
            database: DSQL_REF_DB_NAME || undefined,
        });

        if (!dbSchemaDataResponse.payload || !Array.isArray(dbSchemaDataResponse.payload)) {
            console.log("DSQL_KEY => Error in fetching DB schema");
            console.log(dbSchemaDataResponse);
            process.exit();
        }

        let fetchedDbSchemaObject = dbSchemaDataResponse.payload;
        // fetchedDbSchemaObject.forEach((db, index) => {
        //     db.dbFullName = db.dbFullName?.replace(/^datasquirel_user_\d+_/, "");
        // });

        schemaData = fetchedDbSchemaObject;
    } else if (fs.existsSync(dbSchemaLocalFilePath)) {
        schemaData = JSON.parse(fs.readFileSync(dbSchemaLocalFilePath, "utf8"));
    } else {
        console.log("No source for DB Schema. Please provide a local `dsql.schema.json` file, or provide `DSQL_KEY` and `DSQL_REF_DB_NAME` environment variables.");
        process.exit();
    }

    if (!schemaData) {
        console.log("No schema found");
        process.exit();
    }

    if (DSQL_FULL_SYNC?.match(/true/i)) {
        fs.writeFileSync(dbSchemaLocalFilePath, JSON.stringify(schemaData[0], null, 4), "utf8");
    }

    console.log("Now generating and mapping databases ...");
    // deepcode ignore reDOS: <please specify a reason of ignoring this>
    await createDbFromSchema(schemaData);
    console.log("Databases created Successfully!");
}

// let timeout;

// if (fs.existsSync(dbSchemaLocalFilePath)) {
//     fs.watchFile(dbSchemaLocalFilePath, { interval: 1000 }, (curr, prev) => {
//         clearTimeout(timeout);

//         timeout = setTimeout(() => {
//             console.log("`dsql.schema.json` file changed. Now syncing databases ...");
//             run();
//         }, 5000);
//     });
// }

let interval;
interval = setInterval(() => {
    console.log("Syncing Databases ...");
    run();
}, 20000);

run();