#!/usr/bin/env node

console.error("The ns-verify-bundle script is deprecated!")

const path = require("path");
const fs = require("fs");

const { getProjectDir } = require("../projectHelpers");

const PROJECT_DIR = getProjectDir();
const APP_ID = require(path.resolve(PROJECT_DIR, "./package.json")).nativescript.id;
const APP_NAME = APP_ID.substring(APP_ID.lastIndexOf(".") + 1);
const PROJECT_PATHS = {
    android: path.resolve(PROJECT_DIR, "platforms/android/src/main/assets/app"),
    ios: path.resolve(PROJECT_DIR, `platforms/ios/build/emulator/${APP_NAME}.app/app`),
};

const npmArgs = JSON.parse(process.env.npm_config_argv).original;
const flags = npmArgs.filter(a => a.startsWith("--")).map(a => a.substring(2));
const file = getTargetFile(flags);
const platform = getPlatform(flags);

const filePath = path.resolve(PROJECT_PATHS[platform], file);

console.log(`Checking ${filePath} exists`);
if (!fs.existsSync(filePath)) {
    throwError({message: `${filePath} doesn not exist!`});
}

const maxSize = getMaxSize(flags);
if (maxSize) {
    checkFileSizeIsUnder(filePath, maxSize).then().catch(throwError);
}

function getTargetFile(flags) {
    let fileFlags = flags.filter(f => f.startsWith("file="));

    if (fileFlags.length != 1) {
        throwError({message: "You must provide a target file!"});
    }

    fileFlags = fileFlags[0];
    return fileFlags.substring(fileFlags.indexOf("=") + 1);
}

function getMaxSize(flags) {
    let sizeFlags = flags.filter(f => f.startsWith("maxSize="));

    if (sizeFlags.length == 0) {
        return;
    } else if (sizeFlags.length > 1) {
        throwError({message: "You must provide 0 or 1 maxSize flags!"});
    }

    sizeFlags = sizeFlags[0];
    return sizeFlags.substring(sizeFlags.indexOf("=") + 1);
}

function getPlatform(flags) {
    if (flags.includes("android") && flags.includes("ios")) {
        throwError({message: "You cannot use both --android and --ios flags!"});
    }

    if (flags.includes("android")) {
        return "android";
    } else if (flags.includes("ios")) {
        return "ios";
    } else {
        throwError({message: "You must provide a target platform! Use either --android, or --ios flag."});
    }
}

function checkFileSizeIsUnder(fileName, sizeInBytes) {
    console.log(`Checking ${fileName} size is under ${sizeInBytes}`);

    return new Promise((resolve, reject) => {
        readFile(fileName)
            .then(content => {
                if (content.length <= sizeInBytes) {
                    resolve();
                } else {
                    reject({message: `File "${fileName}" exceeded file size of "${sizeInBytes}".`});
                }
            });
    });
}

function readFile(fileName) {
    return new Promise((resolve, reject) => {
        fs.readFile(fileName, "utf-8", (err, data) => {
            if (err) {
                reject(err);
            } else {
                resolve(data);
            }
        });
    });
}

function throwError(error) {
    console.error(error.message);
    process.exit(error.code || 1);
}