import com.moandjiezana.toml.Toml

import java.nio.file.Paths

def PLUGIN_VERIFICATION_GROUP = "plugin-verification"
def PLUGIN_BUILD_GROUP = "plugin-build"

buildscript {
    repositories {
        mavenCentral()
    }

    dependencies {
        classpath group: 'com.moandjiezana.toml', name: 'toml4j', version: '0.7.1'
    }
}

task pluginTests {
    group = "plugin-verification"

    doLast {
        println("Finished executing plugin tests")
    }
}

task pluginClasses {
    group = "plugin-build"
}

check.dependsOn pluginTests

class PluginBuildData {
    PluginBuildData(String normalizedName, SourceSet mainSources, SourceSet testSources,
                    FileCollection scriptFiles, List<String> dependencyNames) {
        this.normalizedName = normalizedName
        this.mainSources = mainSources
        this.testSources = testSources
        this.scriptFiles = scriptFiles
        this.dependencyNames = dependencyNames
    }

    String normalizedName
    SourceSet mainSources
    SourceSet testSources
    FileCollection scriptFiles
    List<String> dependencyNames
}

Map<String, PluginBuildData> pluginMap = new HashMap<>()

def configurePluginDependencies(SourceSet mainSources, SourceSet testSources,
                                List<PluginBuildData> pluginDependencies) {

    def testConfiguration = testSources.compileConfigurationName
    def mainConfiguration = mainSources.compileConfigurationName

    // Add this plugin as a runtime dependency to the main game project
    dependencies.add(configurations.runtime.name, mainSources.output)

    pluginDependencies.each {
        dependencies.add(mainConfiguration, it.mainSources.output)
        dependencies.add(testConfiguration, it.testSources.output)
    }

    dependencies.add(mainConfiguration, configurations.compile)
    dependencies.add(mainConfiguration, sourceSets.main.output)

    dependencies.add(testConfiguration, mainSources.output)
    dependencies.add(testConfiguration, configurations.testCompile)
    dependencies.add(testConfiguration, sourceSets.test.output)
}

def configurePluginTasks(String name, SourceSet mainSources, SourceSet testSources,
                         FileCollection scriptFiles, List<PluginBuildData> pluginDependencies) {

    def testsTask = task("${name}Tests", type: Test) {
        group = "plugin-verification"

        testClassesDir = testSources.output.classesDir
        classpath = testSources.runtimeClasspath + mainSources.runtimeClasspath

        binResultsDir = file("$buildDir/plugin-test-results/binary/$name")

        reports {
            html.destination = "$buildDir/reports/plugin-tests/$name"
            junitXml.destination = "$buildDir/plugin-tests/$name"
        }

        testLogging {
            events "passed", "skipped", "failed"
        }
    }

    pluginTests.dependsOn testsTask

    if (!scriptFiles.empty) {
        def compileScriptsTask = task("compile${name}Scripts", type: JavaExec) {
            group = "plugin-compile"

            def outputDir = mainSources.output.classesDir.toString()

            inputs.files scriptFiles
            outputs.dir outputDir

            classpath = sourceSets.main.compileClasspath + sourceSets.main.runtimeClasspath
            main = 'org.apollo.game.plugin.kotlin.KotlinPluginCompiler'
            args = [outputDir] + scriptFiles.collect { it.absoluteFile.toString() }
        }

        pluginClasses.dependsOn compileScriptsTask
    }
}

def pluginTree = fileTree(dir: "$pluginsDir")
def pluginDefinitions = pluginTree.matching {
    include '**/meta.toml'
}

pluginDefinitions.each { file ->
    def meta = new Toml()
    meta.read(file.absoluteFile)

    def pluginFolder = Paths.get(file.parentFile.absolutePath)
    def name = meta.getString("name", pluginFolder.getFileName().toString())
    def normalizedName = name.replaceAll("[^a-zA-Z0-9_]", '_').toLowerCase()
    def packageName = meta.getString("package", "org.apollo.game.plugin")
    def authors = meta.getList("authors", new ArrayList())
    def dependencies = meta.getList("dependencies", new ArrayList())

    def scripts = fileTree(file.parentFile) {
        include '**/*.plugin.kts'
    }

    def srcsDir = meta.getString("config.src", "src/")
    def testDir = meta.getString("config.test", "test/")

    def mainSources = sourceSets.create("${normalizedName}_main") {
        kotlin {
            srcDir pluginFolder.resolve(srcsDir).toString()
            exclude '*.kts'
        }
    }

    def testSources = sourceSets.create("${normalizedName}_test") {
        kotlin {
            srcDir pluginFolder.resolve(testDir).toString()
        }
    }

    def pluginData = new PluginBuildData(normalizedName, mainSources, testSources, scripts, dependencies)
    pluginMap.put(normalizedName, pluginData)
}

pluginMap.values().each {
    def dependencies = it.dependencyNames.collect { name -> pluginMap.get(name) }

    configurePluginDependencies(it.mainSources, it.testSources, dependencies)
    configurePluginTasks(it.normalizedName, it.mainSources, it.testSources, it.scriptFiles, dependencies)
}