// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.

import java.text.SimpleDateFormat

// This gradle scripts generates a "unique" version code for our release versions.
//
// The result of the version code depends on the timezone. We assume that this script will only be used
// for release versions and running on our build servers with a fixed timezone.
//
// The version code is composed like: yDDDHHmm
//  * y   = Double digit year, with 18 subtracted: 2018 -> 18 -> 0
//  * DDD = Day of the year, pad with zeros if needed: September 6th -> 249
//  * HH  = Hour in day (00-23)
//  * mm  = Minute in hour
//
// For September 6th, 2018, 9:41 am this will generate the versionCode: 2490941 (0-249-09-41).
//
// Note that we only use this generated version code for builds we want to distribute. For local
// debug builds we use a fixed versionCode to not mess with the caching mechanism of the build
// system.

ext {
    def today = new Date()

    // We use the current year (double digit) and subtract 18. We first released Reference Browser in
    // 2018 so this value will start counting at 0 and increment by one every year.
    def year = String.valueOf((new SimpleDateFormat("yy").format(today) as int) - 18)

    // We use the day in the Year (e.g. 248) as opposed to month + day (0510) because it's one digit shorter.
    // If needed we pad with zeros (e.g. 25 -> 025)
    def day = String.format("%03d", (new SimpleDateFormat("D").format(today) as int))

    // We append the hour in day (24h) and minute in hour (7:26 pm -> 1926). We do not append
    // seconds. This assumes that we do not need to build multiple release(!) builds the same
    // minute.
    def time = new SimpleDateFormat("HHmm").format(today)

    // todo after first build is deployed to Google Play generatedVersionCode = (year + day + time) as int
    generatedVersionCode = 1

    println("Generated versionCode: $generatedVersionCode")
    println()
}