apply plugin: 'checkstyle'
apply plugin: 'cpd'
apply plugin: 'pmd'
apply plugin: 'io.gitlab.arturbosch.detekt'

def getCpdTask
def getPmdTask
def getCheckstyleTask
def getLintTask
def getKotlinDetektTask

def appendError
def appendCpdErrors
def appendKotlinErrors
def appendCheckstyleErrors
def appendPmdErrors
def appendLintErrors

repositories {
    maven { url "http://dl.bintray.com/touchin/touchin-tools" }
}

configurations {
    pngtastic
}

cpd {
    skipLexicalErrors = true
}

detekt {
    config = files("$buildScriptsDir/kotlin/detekt-config.yml")
    parallel = true

    reports {
        html {
            enabled = true
            destination = file("${project.buildDir}/reports/kotlin-detekt.html")
        }
        xml {
            enabled = true
            destination = file("${project.buildDir}/reports/kotlin-detekt.xml")
        }
    }

}

import org.apache.tools.ant.taskdefs.condition.Os

ext.getIdeaFormatTask = { isAndroidProject, sources ->
    def ideaPath = System.getenv("IDEA_HOME")
    if (ideaPath == null) {
        return tasks.create((isAndroidProject ? "android" : "server") + "donothing")
    }
    return tasks.create((isAndroidProject ? "android" : "server") + "IdeaFormat_$project.name", Exec) {
        def inspectionPath
        def params = ["-r", "-mask", "*.java,*.kt,*.xml"]
        for (String source : sources) {
            params.add(source)
        }

        if (Os.isFamily(Os.FAMILY_WINDOWS)) {
            inspectionPath = ['cmd', '/c', "\"${ideaPath}\\bin\\format.bat\" ${params.join(" ")}"]
        } else {
            inspectionPath = ["$ideaPath/bin/format.sh"]
        }
        commandLine inspectionPath
        if (!Os.isFamily(Os.FAMILY_WINDOWS)) {
            args = params
        }
    }
}

ext.getStaticAnalysisTaskNames = { isAndroidProject, sources, buildVariant, checkstyleEnabled, pmdEnabled ->
    def tasksNames = new ArrayList<String>()
    try {
        tasksNames.add(getCpdTask(isAndroidProject, sources))
        tasksNames.add(getKotlinDetektTask())
        if (isAndroidProject) {
            if (checkstyleEnabled) {
                tasksNames.add(getCheckstyleTask(sources))
            }
            if (pmdEnabled) {
                tasksNames.add(getPmdTask(sources))
            }
            tasksNames.add(getLintTask(buildVariant))
        }
    } catch (Exception exception) {
        println(exception.toString())
    }
    return tasksNames
}

ext.generateReport = { isAndroidProject ->
    StringBuilder consoleReport = new StringBuilder()
    consoleReport.append("STATIC ANALYSIS RESULTS:")
    def count = 0

    def previousCount = count
    count = appendCpdErrors(count, new File("${project.buildDir}/reports/cpd.xml"))
    if (count - previousCount > 0) {
        consoleReport.append("\nCPD: FAILED (" + (count - previousCount) + " errors)")
    } else {
        consoleReport.append("\nCPD: PASSED")
    }

    previousCount = count
    count = appendKotlinErrors(count, new File("${project.buildDir}/reports/kotlin-detekt.xml"))
    if (count - previousCount > 0) {
        consoleReport.append("\nKotlin-detekt: FAILED (" + (count - previousCount) + " errors)")
    } else {
        consoleReport.append("\nKotlin-detekt: PASSED")
    }

    if (isAndroidProject) {
        def checkstyleFile = new File("${project.buildDir}/reports/checkstyle.xml")
        if (checkstyleFile.exists()) {
            previousCount = count
            count = appendCheckstyleErrors(count, checkstyleFile)
            if (count - previousCount > 0) {
                consoleReport.append("\nCheckstyle: FAILED (" + (count - previousCount) + " errors)")
            } else {
                consoleReport.append("\nCheckstyle: PASSED")
            }
        }

        def pmdFile = new File("${project.buildDir}/reports/pmd.xml")
        if (pmdFile.exists()) {
            previousCount = count
            count = appendPmdErrors(count, pmdFile)
            if (count - previousCount > 0) {
                consoleReport.append("\nPMD: FAILED (" + (count - previousCount) + " errors)")
            } else {
                consoleReport.append("\nPMD: PASSED")
            }
        }

        previousCount = count
        count = appendLintErrors(count, new File("${project.buildDir}/reports/lint_report.xml"))
        if (count - previousCount > 0) {
            consoleReport.append("\nLint: FAILED (" + (count - previousCount) + " errors)")
        } else {
            consoleReport.append("\nLint: PASSED")
        }
    }

    if (count > 0) {
        consoleReport.append("\nOverall: FAILED (" + count + " errors)")
        throw new Exception(consoleReport.toString())
    } else {
        consoleReport.append("\nOverall: PASSED")
        println(consoleReport.toString())
    }
}

appendError = { number, analyzer, file, line, errorId, errorLink, description ->
    println("$number. $analyzer : $description ($errorId)\n\tat $file: $line")
}

appendKotlinErrors = { count, checkstyleFile ->
    def rootNode = new XmlParser().parse(checkstyleFile)
    for (def fileNode : rootNode.children()) {
        if (!fileNode.name().equals("file")) {
            continue
        }

        for (def errorNode : fileNode.children()) {
            if (!errorNode.name().equals("error")) {
                continue
            }
            count++

            appendError(count, "Detekt", fileNode.attribute("name"), errorNode.attribute("line"), errorNode.attribute("source"), "", errorNode.attribute("message"))
        }
    }
    return count
}

appendCpdErrors = { count, cpdFile ->
    def rootNode = new XmlParser().parse(cpdFile)
    for (def duplicationNode : rootNode.children()) {
        if (!duplicationNode.name().equals("duplication")) {
            continue
        }
        count++

        def duplicationIndex = 0

        String duplicationPoints = ""
        for (def filePointNode : duplicationNode.children()) {
            if (filePointNode.name().equals("file")) {
                def file = filePointNode.attribute("path")
                def line = filePointNode.attribute("line")
                duplicationPoints += "\n " + file + ":" + line
                duplicationIndex++
            }
        }
        println("$count CPD: code duplication $duplicationPoints")
    }
    return count
}

appendCheckstyleErrors = { count, checkstyleFile ->
    def rootNode = new XmlParser().parse(checkstyleFile)
    for (def fileNode : rootNode.children()) {
        if (!fileNode.name().equals("file")) {
            continue
        }

        for (def errorNode : fileNode.children()) {
            if (!errorNode.name().equals("error")) {
                continue
            }
            count++

            def error = errorNode.attribute("source")
            def link = "http://checkstyle.sourceforge.net/apidocs/" + error.replace('.', '/') + ".html"
            appendError(count, "Checkstyle", fileNode.attribute("name"), errorNode.attribute("line"), error, link, errorNode.attribute("message"))
        }
    }
    return count
}

appendPmdErrors = { count, pmdFile ->
    def rootNode = new XmlParser().parse(pmdFile)
    for (def fileNode : rootNode.children()) {
        if (!fileNode.name().equals("file")) {
            continue
        }

        for (def errorNode : fileNode.children()) {
            if (!errorNode.name().equals("violation")) {
                continue
            }
            count++

            appendError(count, "PMD", fileNode.attribute("name"), errorNode.attribute("beginline"),
                    errorNode.attribute("rule").trim(), errorNode.attribute("externalInfoUrl").trim(), errorNode.text().trim())
        }
    }
    return count
}

appendLintErrors = { count, lintFile ->
    def rootNode = new XmlParser().parse(lintFile)
    for (def issueNode : rootNode.children()) {
        if (!issueNode.name().equals("issue")
                || !issueNode.attribute("severity").equals("Error")) {
            continue
        }
        for (def locationNode : issueNode.children()) {
            if (!locationNode.name().equals("location")) {
                continue
            }
            count++
            appendError(count, "Lint", locationNode.attribute("file"), locationNode.attribute("line"),
                    issueNode.attribute("id"), issueNode.attribute("explanation"), issueNode.attribute("message"))
        }
    }
    return count
}

getCpdTask = { isAndroidProject, sources ->
    def taskName = (isAndroidProject ? "android" : "server") + "cpd_${project.name}"
    def task = tasks.findByName(taskName)
    if (task == null) {
        task = tasks.create(taskName, tasks.findByName('cpdCheck').getClass().getSuperclass()) {
            minimumTokenCount = 60
            source = files(sources)
            ignoreFailures = true
            reports {
                xml {
                    enabled = true
                    destination = file("${project.buildDir}/reports/cpd.xml")
                }
            }
        }
    }
    return task.name
}

getPmdTask = { sources ->
    def taskName = "pmd_${project.name}"
    def task = tasks.findByName(taskName)
    if (task == null) {
        task = tasks.create(taskName, Pmd) {
            pmdClasspath = configurations.pmd.asFileTree
            ruleSetFiles = files "$buildScriptsDir/pmd/rulesets/java/android.xml"
            ruleSets = []
            source files(sources)
            ignoreFailures = true
            reports {
                html {
                    enabled = true
                    destination file("${project.buildDir}/reports/pmd.html")
                }
                xml {
                    enabled = true
                    destination file("${project.buildDir}/reports/pmd.xml")
                }
            }
        }
    }
    return task.name
}

getLintTask = { buildVariant ->
    def lintTaskName
    if (buildVariant != null) {
        lintTaskName = "lint${buildVariant.name.capitalize()}"
    } else {
        def lintDebugTask = tasks.matching { it.getName().contains("lint") && it.getName().contains("Debug") }.first()
        lintTaskName = lintDebugTask.getName()
    }
    android.lintOptions.abortOnError = false
    android.lintOptions.checkAllWarnings = true
    android.lintOptions.warningsAsErrors = false
    android.lintOptions.xmlReport = true
    android.lintOptions.xmlOutput = file "$project.buildDir/reports/lint_report.xml"
    android.lintOptions.htmlReport = false
    android.lintOptions.lintConfig = file "$buildScriptsDir/lint/lint.xml"
    return lintTaskName
}

getCheckstyleTask = { sources ->
    def taskName = "checkstyle_$project.name"
    def task = tasks.findByName(taskName)
    if (task == null) {
        def compileReleaseTask = tasks.matching {
            it.getName().contains("compile") && it.getName().contains("Release") && it.getName().contains("Java") && !it.getName().contains("UnitTest")
        }.last()
        task = tasks.create(taskName, Checkstyle) {
            ignoreFailures = true
            showViolations = false
            source files(sources)
            configFile file("$buildScriptsDir/checkstyle/configuration/touchin_checkstyle.xml")
            checkstyleClasspath = configurations.checkstyle.asFileTree
            classpath = files(System.getenv("ANDROID_HOME") + "/platforms/" + android.compileSdkVersion + "/android.jar") +
                    files(System.properties.'java.home' + "/lib/rt.jar") +
                    compileReleaseTask.classpath
            reports {
                xml {
                    enabled = true
                    destination file("${project.buildDir}/reports/checkstyle.xml")
                }
            }
        }
    }
    return task.name
}

getKotlinDetektTask = {
    // TODO add excludes from rootProject.extensions.findByName("staticAnalysisExcludes")
    "detekt"
}

task optimizePng {
    doFirst {
        def jarArgs = new ArrayList<String>()
        jarArgs.add(configurations.pngtastic.asPath)
        def relatedPathIndex = "${rootDir}".length() + 1
        for (def file : fileTree(dir: "${rootDir}", include: '**/src/**/res/drawable**/*.png')) {
            jarArgs.add(file.absolutePath.substring(relatedPathIndex))
        }
        for (def file : fileTree(dir: "${rootDir}", include: '**/src/**/res/mipmap**/*.png')) {
            jarArgs.add(file.absolutePath.substring(relatedPathIndex))
        }
        javaexec { main = "-jar"; args = jarArgs; workingDir = file("${rootDir}") }
    }
}

dependencies {
    pmd 'net.sourceforge.pmd:pmd-core:5.5.3'
    pmd 'net.sourceforge.pmd:pmd-java:5.5.3'

    checkstyle 'ru.touchin:checkstyle:7.6.2-fork'

    pngtastic 'com.github.depsypher:pngtastic:1.2'
}