ext {
	docResourcesVersion = '0.2.5'
	blockSwitchVersion = '0.5.0'
}

configurations {
	docs
	asciidoctorExt
}

dependencies {
	docs "io.spring.docresources:spring-doc-resources:${docResourcesVersion}@zip"
	asciidoctorExt "io.spring.asciidoctor:spring-asciidoctor-extensions-block-switch:$blockSwitchVersion"
}

task prepareAsciidocBuild(type: Sync) {
	dependsOn configurations.docs
	from {
		configurations.docs.collect { zipTree(it) }
	}
	duplicatesStrategy = DuplicatesStrategy.INCLUDE
	from 'src/reference/asciidoc/'
	into "$buildDir/asciidoc"
}

task checkAsciidocLinks {
	dependsOn prepareAsciidocBuild
	inputs.dir("$buildDir/asciidoc")
	doLast {
		def errors = new ArrayList<>();
		errors.add('*** Anchor reference errors found:')
		inputs.files.filter{ f -> f.path.endsWith('.adoc') }.each { file ->
			def doc = file.text
			def anchors = new HashSet<>()
			def matcher = (doc =~ /\[\[([^]]+)]]/)
			while (matcher.find()) {
				anchors.add(matcher.group(1))
			}
			matcher = (doc =~ /<<([^>]+)>>/)
			while (matcher.find()) {
				def anchor = matcher.group(1);
				def hasComma = anchor.contains(',')
				if (!anchor.startsWith('./')) {
					if (hasComma) {
						anchor = anchor.substring(0, anchor.indexOf(","));
					}
					if (!anchors.contains(anchor)) {
						errors.add("\nAnchor '$anchor' not found in '${file.name}', " +
								"if in another file, it needs to be qualified with './fileName.adoc#'")
					}
				}
				else {
					if (!hasComma) {
						errors.add("\nExternal anchor '$anchor' in '${file.name}' should have a textual description (,...)")
					}
				}
			}
		}
		if (errors.size() > 1) {
			throw new InvalidUserDataException(errors.toString())
		}
	}
}

asciidoctorPdf {
	dependsOn checkAsciidocLinks
	baseDirFollowsSourceFile()
	configurations 'asciidoctorExt'

	asciidoctorj {
		sourceDir "$buildDir/asciidoc"
		inputs.dir(sourceDir)
		sources {
			include 'index-single.adoc'
		}
		options doctype: 'book'
		attributes 'icons': 'font',
				'sectanchors': '',
				'sectnums': '',
				'toc': '',
				'source-highlighter' : 'coderay',
				revnumber: project.version,
				'project-version': project.version
	}
}

asciidoctorj {
	version = '2.5.2'
	options doctype: 'book', eruby: 'erubis'
	attributes 'docinfo': 'shared',
			stylesdir: 'css/',
			stylesheet: 'stylesheet.css',
			'linkcss': true,
			'copycss': false,
			'icons': 'font',
			'sectanchors': '',
			'source-highlighter': 'highlight.js',
			'highlightjsdir': 'js/highlight',
			'highlightjs-theme': 'github',
			'idprefix': '',
			'idseparator': '-',
			'allow-uri-read': '',
			'toc': 'left',
			'toclevels': '4',
			revnumber: project.version,
			'project-version': project.version
}

asciidoctor {
	dependsOn asciidoctorPdf
	baseDirFollowsSourceFile()
	configurations 'asciidoctorExt'
	sourceDir "$buildDir/asciidoc"
	inputs.dir(sourceDir)
	resources {
		from(sourceDir) {
			include 'images/*', 'css/**', 'js/**'
		}
	}

}

task reference(dependsOn: asciidoctor) {
	group = 'Documentation'
	description = 'Generate the reference documentation'
}

reference.onlyIf { 'true' != System.env['NO_REFERENCE_TASK'] || project.hasProperty('ignoreEnvToStopReference') }