/*
 * Iris is a World Generator for Minecraft Servers
 * Copyright (c) 2026 Arcane Arts (Volmit Software)
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */

/*
 * Shared VolmLib source resolution, applied by every Iris settings file:
 *
 *   root            settings.gradle
 *   adapters/fabric settings.gradle
 *   adapters/forge  settings.gradle
 *   adapters/neoforge settings.gradle
 *
 * Apply with an explicit File so the path never depends on the invocation directory:
 *
 *   apply from: new File(settingsDir, 'gradle/volmlib-resolution.settings.gradle')                   // root
 *   apply from: new File(settingsDir, '../../gradle/volmlib-resolution.settings.gradle').canonicalFile // adapters
 *
 * `settingsDir` resolves against the *including* build, so the upward search for a sibling
 * VolmLib checkout works from the repo root and from a nested adapter build alike.
 *
 * Behaviour:
 *   -PuseLocalVolmLib=false           disables source substitution (CI uses this).
 *   -PlocalVolmLibDirectory=<path>    explicit VolmLib checkout (relative paths resolve
 *                                     against the including build's settings directory).
 *   VOLMLIB_DIR=<path>                same, via environment.
 *   otherwise                         walk up from settingsDir looking for a `VolmLib` directory
 *                                     that contains a settings script.
 *
 * When nothing is found the build falls back to the published `volmLibCoordinate` from
 * gradle.properties.
 */

import java.io.File

boolean irisHasVolmLibSettings(File directory) {
    if (directory == null) {
        return false
    }

    new File(directory, 'settings.gradle.kts').exists() || new File(directory, 'settings.gradle').exists()
}

File irisResolveLocalVolmLibDirectory() {
    String configuredPath = providers.gradleProperty('localVolmLibDirectory')
        .orElse(providers.environmentVariable('VOLMLIB_DIR'))
        .orNull
    if (configuredPath != null && !configuredPath.isBlank()) {
        File configuredDirectory = new File(configuredPath)
        if (!configuredDirectory.isAbsolute()) {
            configuredDirectory = new File(settingsDir, configuredPath)
        }
        if (irisHasVolmLibSettings(configuredDirectory)) {
            return configuredDirectory
        }
    }

    File currentDirectory = settingsDir
    while (currentDirectory != null) {
        File candidate = new File(currentDirectory, 'VolmLib')
        if (irisHasVolmLibSettings(candidate)) {
            return candidate
        }

        currentDirectory = currentDirectory.parentFile
    }

    null
}

boolean irisUseLocalVolmLib = providers.gradleProperty('useLocalVolmLib')
    .orElse('true')
    .map { String value -> value.equalsIgnoreCase('true') }
    .get()
File irisLocalVolmLibDirectory = irisResolveLocalVolmLibDirectory()

if (irisUseLocalVolmLib && irisLocalVolmLibDirectory != null) {
    includeBuild(irisLocalVolmLibDirectory) {
        dependencySubstitution {
            substitute(module('com.github.VolmitSoftware:VolmLib')).using(project(':shared'))
            substitute(module('com.github.VolmitSoftware.VolmLib:shared')).using(project(':shared'))
            substitute(module('com.github.VolmitSoftware.VolmLib:volmlib-shared')).using(project(':shared'))
        }
    }
}