package org.jetbrains.dokka.javadoc

import com.sun.javadoc.*
import org.jetbrains.dokka.*
import java.lang.reflect.Modifier
import java.util.Collections
import java.util.HashSet

open class DocumentationNodeBareAdapter(val docNode: DocumentationNode) : Doc {
    private var rawCommentText_ = rawCommentText

    override fun name(): String = docNode.name
    override fun position(): SourcePosition? = SourcePositionAdapter(docNode)

    override fun inlineTags(): Array<out Tag>? = emptyArray()
    override fun firstSentenceTags(): Array<out Tag>? = emptyArray()
    override fun tags(): Array<out Tag> = emptyArray()
    override fun tags(tagname: String?): Array<out Tag>? = tags().filter { it.kind() == tagname || it.kind() == "@$tagname" }.toTypedArray()
    override fun seeTags(): Array<out SeeTag>? = tags().filterIsInstance<SeeTag>().toTypedArray()
    override fun commentText(): String = ""

    override fun setRawCommentText(rawDocumentation: String?) {
        rawCommentText_ = rawDocumentation ?: ""
    }

    override fun getRawCommentText(): String = rawCommentText_

    override fun isError(): Boolean = false
    override fun isException(): Boolean = docNode.kind == DocumentationNode.Kind.Exception
    override fun isEnumConstant(): Boolean = docNode.kind == DocumentationNode.Kind.EnumItem
    override fun isEnum(): Boolean = docNode.kind == DocumentationNode.Kind.Enum
    override fun isMethod(): Boolean = docNode.kind == DocumentationNode.Kind.Function
    override fun isInterface(): Boolean = docNode.kind == DocumentationNode.Kind.Interface
    override fun isField(): Boolean = docNode.kind == DocumentationNode.Kind.Property
    override fun isClass(): Boolean = docNode.kind == DocumentationNode.Kind.Class
    override fun isAnnotationType(): Boolean = docNode.kind == DocumentationNode.Kind.AnnotationClass
    override fun isConstructor(): Boolean = docNode.kind == DocumentationNode.Kind.Constructor
    override fun isOrdinaryClass(): Boolean = docNode.kind == DocumentationNode.Kind.Class
    override fun isAnnotationTypeElement(): Boolean = docNode.kind == DocumentationNode.Kind.Annotation

    override fun compareTo(other: Any?): Int = when (other) {
        !is DocumentationNodeAdapter -> 1
        else -> docNode.name.compareTo(other.docNode.name)
    }

    override fun equals(other: Any?): Boolean = docNode.qualifiedName == (other as? DocumentationNodeAdapter)?.docNode?.qualifiedName
    override fun hashCode(): Int = docNode.name.hashCode()

    override fun isIncluded(): Boolean = docNode.kind != DocumentationNode.Kind.ExternalClass
}


// TODO think of source position instead of null
// TODO tags
open class DocumentationNodeAdapter(val module: ModuleNodeAdapter, docNode: DocumentationNode) : DocumentationNodeBareAdapter(docNode) {
    override fun inlineTags(): Array<out Tag> = buildInlineTags(module, this, docNode.content).toTypedArray()
    override fun firstSentenceTags(): Array<out Tag> = buildInlineTags(module, this, docNode.summary).toTypedArray()
    override fun tags(): Array<out Tag> = (buildInlineTags(module, this, docNode.content) + docNode.content.sections.flatMap {
        when (it.tag) {
            "See Also" -> buildInlineTags(module, this, it)
            else -> emptyList<Tag>()
        }
    }).toTypedArray()
}

val allClassKinds = setOf(DocumentationNode.Kind.Class, DocumentationNode.Kind.Enum, DocumentationNode.Kind.Interface, DocumentationNode.Kind.Object, DocumentationNode.Kind.Exception)

class PackageAdapter(module: ModuleNodeAdapter, val node: DocumentationNode) : DocumentationNodeAdapter(module, node), PackageDoc {
    private val allClasses = node.members.filter { it.kind in allClassKinds }.toMap { it.name }
    private val packageFacade = PackageFacadeAdapter(module, node)

    override fun findClass(className: String?): ClassDoc? =
            allClasses.get(className)?.let { ClassDocumentationNodeAdapter(module, it) }
                    ?: if (packageFacade.name() == className) packageFacade else null

    override fun annotationTypes(): Array<out AnnotationTypeDoc> = emptyArray()
    override fun annotations(): Array<out AnnotationDesc> = node.members(DocumentationNode.Kind.AnnotationClass).map { AnnotationDescAdapter(module, it) }.toTypedArray()
    override fun exceptions(): Array<out ClassDoc> = node.members(DocumentationNode.Kind.Exception).map { ClassDocumentationNodeAdapter(module, it) }.toTypedArray()
    override fun ordinaryClasses(): Array<out ClassDoc> = (node.members(DocumentationNode.Kind.Class).map { ClassDocumentationNodeAdapter(module, it) } + packageFacade).toTypedArray()
    override fun interfaces(): Array<out ClassDoc> = node.members(DocumentationNode.Kind.Interface).map { ClassDocumentationNodeAdapter(module, it) }.toTypedArray()
    override fun errors(): Array<out ClassDoc> = emptyArray()
    override fun enums(): Array<out ClassDoc> = node.members(DocumentationNode.Kind.Enum).map { ClassDocumentationNodeAdapter(module, it) }.toTypedArray()
    override fun allClasses(filter: Boolean): Array<out ClassDoc> = (allClasses.values().map { ClassDocumentationNodeAdapter(module, it) } + packageFacade).toTypedArray()
    override fun allClasses(): Array<out ClassDoc> = allClasses(true)

    override fun isIncluded(): Boolean = node.name in module.allPackages
}

class AnnotationTypeDocAdapter(module: ModuleNodeAdapter, node: DocumentationNode) : ClassDocumentationNodeAdapter(module, node), AnnotationTypeDoc {
    override fun elements(): Array<out AnnotationTypeElementDoc>? = emptyArray() // TODO
}

class AnnotationDescAdapter(val module: ModuleNodeAdapter, val node: DocumentationNode) : AnnotationDesc {
    override fun annotationType(): AnnotationTypeDoc? = AnnotationTypeDocAdapter(module, node) // TODO ?????
    override fun isSynthesized(): Boolean = false
    override fun elementValues(): Array<out AnnotationDesc.ElementValuePair>? = emptyArray() // TODO
}

class ProgramElementAdapter(module: ModuleNodeAdapter, val node: DocumentationNode) : DocumentationNodeAdapter(module, node), ProgramElementDoc {
    override fun isPublic(): Boolean = true
    override fun isPackagePrivate(): Boolean = false
    override fun isStatic(): Boolean = node.owner?.kind in listOf(DocumentationNode.Kind.Package, DocumentationNode.Kind.ExternalClass)
    override fun modifierSpecifier(): Int = Modifier.PUBLIC + if (isStatic) Modifier.STATIC else 0
    override fun qualifiedName(): String? = node.qualifiedName
    override fun annotations(): Array<out AnnotationDesc>? = node.annotations.map { AnnotationDescAdapter(module, it) }.toTypedArray()
    override fun modifiers(): String? = "public ${if (isStatic) "static" else ""}".trim()
    override fun isProtected(): Boolean = false

    override fun isFinal(): Boolean = node.details(DocumentationNode.Kind.Modifier).any { it.name == "final" }

    override fun containingPackage(): PackageDoc? {
        var owner: DocumentationNode? = node
        while (owner != null) {
            if (owner.kind == DocumentationNode.Kind.Package) {
                return PackageAdapter(module, owner)
            }
            owner = owner.owner
        }

        return null
    }

    override fun containingClass(): ClassDoc? {
        var owner = node.owner
        while (owner != null) {
            when (owner.kind) {
                DocumentationNode.Kind.Class -> return ClassDocumentationNodeAdapter(module, owner)
                DocumentationNode.Kind.Package -> return PackageFacadeAdapter(module, owner)
                else -> owner = owner.owner
            }
        }

        return null
    }

    override fun isPrivate(): Boolean = false
    override fun isIncluded(): Boolean = containingPackage()?.isIncluded ?: false && containingClass()?.let { it.isIncluded } ?: true
}

public fun DocumentationNode.getArrayElementType(): DocumentationNode? = when (name) {
    "Array" -> details(DocumentationNode.Kind.Type).singleOrNull()?.let { et -> et.getArrayElementType() ?: et } ?: DocumentationNode("Object", content, DocumentationNode.Kind.ExternalClass)
    "IntArray", "LongArray", "ShortArray", "ByteArray", "CharArray", "DoubleArray", "FloatArray", "BooleanArray" -> DocumentationNode(name.removeSuffix("Array").toLowerCase(), content, DocumentationNode.Kind.Type)
    else -> null
}

fun DocumentationNode.getArrayDimension(): Int = when (name) {
    "Array" -> 1 + (details(DocumentationNode.Kind.Type).singleOrNull()?.getArrayDimension() ?: 0)
    "IntArray", "LongArray", "ShortArray", "ByteArray", "CharArray", "DoubleArray", "FloatArray", "BooleanArray" -> 1
    else -> 0
}

//fun DocumentationNode.convertNativeType(): DocumentationNode = when (name) {
//    "Unit" -> DocumentationNode("void", content, kind)
//    "Int" -> DocumentationNode("int", content, kind)
//}

open class TypeAdapter(val module: ModuleNodeAdapter, val node: DocumentationNode) : Type {
    override fun qualifiedTypeName(): String = node.getArrayElementType()?.qualifiedName ?: node.qualifiedName
    override fun typeName(): String = node.getArrayElementType()?.name ?: node.name
    override fun simpleTypeName(): String = typeName() // TODO difference typeName() vs simpleTypeName()

    override fun dimension(): String = Collections.nCopies(node.getArrayDimension(), "[]").joinToString("")
    override fun isPrimitive(): Boolean = node.name in setOf("Int", "Long", "Short", "Byte", "Char", "Double", "Float", "Boolean", "Unit")
    override fun asClassDoc(): ClassDoc? = if (isPrimitive) null else
            elementType?.asClassDoc() ?:
            when (node.kind) {
                DocumentationNode.Kind.Class,
                DocumentationNode.Kind.ExternalClass,
                DocumentationNode.Kind.Interface,
                DocumentationNode.Kind.Object,
                DocumentationNode.Kind.Exception,
                DocumentationNode.Kind.Enum -> ClassDocumentationNodeAdapter(module, node)

                else -> when {
                    node.links.isNotEmpty() -> TypeAdapter(module, node.links.first()).asClassDoc()
                    else -> ClassDocumentationNodeAdapter(module, node) // TODO ?
                }
            }

    override fun asTypeVariable(): TypeVariable? = if (node.kind == DocumentationNode.Kind.TypeParameter) TypeVariableAdapter(module, node) else null
    override fun asParameterizedType(): ParameterizedType? =
            if (node.details(DocumentationNode.Kind.Type).isNotEmpty()) ParameterizedTypeAdapter(module, node)
            else null  // TODO it should ignore dimensions

    override fun asAnnotationTypeDoc(): AnnotationTypeDoc? = if (node.kind == DocumentationNode.Kind.AnnotationClass) AnnotationTypeDocAdapter(module, node) else null
    override fun asAnnotatedType(): AnnotatedType? = if (node.annotations.isNotEmpty()) AnnotatedTypeAdapter(module, node) else null
    override fun getElementType(): Type? = node.getArrayElementType()?.let { et -> TypeAdapter(module, et) }
    override fun asWildcardType(): WildcardType? = null

    override fun toString(): String = qualifiedTypeName() + dimension()
    override fun hashCode(): Int = node.name.hashCode()
    override fun equals(other: Any?): Boolean = other is TypeAdapter && toString() == other.toString()
}

class AnnotatedTypeAdapter(module: ModuleNodeAdapter, node: DocumentationNode) : TypeAdapter(module, node), AnnotatedType {
    override fun underlyingType(): Type? = this
    override fun annotations(): Array<out AnnotationDesc> = node.annotations.map { AnnotationDescAdapter(module, it) }.toTypedArray()
}

class WildcardTypeAdapter(module: ModuleNodeAdapter, node: DocumentationNode) : TypeAdapter(module, node), WildcardType {
    override fun extendsBounds(): Array<out Type> = node.details(DocumentationNode.Kind.UpperBound).map { TypeAdapter(module, it) }.toTypedArray()
    override fun superBounds(): Array<out Type> = node.details(DocumentationNode.Kind.LowerBound).map { TypeAdapter(module, it) }.toTypedArray()
}

class TypeVariableAdapter(module: ModuleNodeAdapter, node: DocumentationNode) : TypeAdapter(module, node), TypeVariable {
    override fun owner(): ProgramElementDoc = node.owner!!.let<DocumentationNode, ProgramElementDoc> { owner ->
        when (owner.kind) {
            DocumentationNode.Kind.Function,
            DocumentationNode.Kind.Constructor -> ExecutableMemberAdapter(module, owner)

            DocumentationNode.Kind.Class,
            DocumentationNode.Kind.Interface,
            DocumentationNode.Kind.Enum -> ClassDocumentationNodeAdapter(module, owner)

            else -> ProgramElementAdapter(module, node.owner!!)
        }
    }

    override fun bounds(): Array<out Type>? = node.details(DocumentationNode.Kind.UpperBound).map { TypeAdapter(module, it) }.toTypedArray()
    override fun annotations(): Array<out AnnotationDesc>? = node.members(DocumentationNode.Kind.Annotation).map { AnnotationDescAdapter(module, it) }.toTypedArray()

    override fun qualifiedTypeName(): String = node.name
    override fun simpleTypeName(): String = node.name
    override fun typeName(): String = node.name

    override fun hashCode(): Int = node.name.hashCode()
    override fun equals(other: Any?): Boolean = other is Type && other.typeName() == typeName() && other.asTypeVariable()?.owner() == owner()

    override fun asTypeVariable(): TypeVariableAdapter = this
    //    override fun asClassDoc(): ClassDoc? = null
}

class ParameterizedTypeAdapter(module: ModuleNodeAdapter, node: DocumentationNode) : TypeAdapter(module, node), ParameterizedType {
    override fun typeArguments(): Array<out Type> = node.details(DocumentationNode.Kind.Type).map { TypeVariableAdapter(module, it) }.toTypedArray()
    override fun superclassType(): Type? =
            node.lookupSuperClasses(module)
                    .firstOrNull { it.kind == DocumentationNode.Kind.Class || it.kind == DocumentationNode.Kind.ExternalClass }
                    ?.let { ClassDocumentationNodeAdapter(module, it) }

    override fun interfaceTypes(): Array<out Type> =
            node.lookupSuperClasses(module)
                    .filter { it.kind == DocumentationNode.Kind.Interface }
                    .map { ClassDocumentationNodeAdapter(module, it) }
                    .toTypedArray()

    override fun containingType(): Type? = when (node.owner?.kind) {
        DocumentationNode.Kind.Package -> null
        DocumentationNode.Kind.Class,
        DocumentationNode.Kind.Interface,
        DocumentationNode.Kind.Object,
        DocumentationNode.Kind.Enum -> ClassDocumentationNodeAdapter(module, node.owner!!)

        else -> null
    }
}

class ParameterAdapter(module: ModuleNodeAdapter, val node: DocumentationNode) : DocumentationNodeAdapter(module, node), Parameter {
    override fun typeName(): String? = JavaLanguageService().renderType(node.detail(DocumentationNode.Kind.Type))
    override fun type(): Type? = TypeAdapter(module, node.detail(DocumentationNode.Kind.Type))
    override fun annotations(): Array<out AnnotationDesc>? = node.details(DocumentationNode.Kind.Annotation).map { AnnotationDescAdapter(module, it) }.toTypedArray()
}

class ReceiverParameterAdapter(module: ModuleNodeAdapter, val receiverType: DocumentationNode) : DocumentationNodeAdapter(module, receiverType), Parameter {
    override fun typeName(): String? = receiverType.name
    override fun type(): Type? = TypeAdapter(module, receiverType)
    override fun annotations(): Array<out AnnotationDesc> = emptyArray()
    override fun name(): String = "receiver"
}

fun classOf(fqName: String, kind: DocumentationNode.Kind = DocumentationNode.Kind.Class) = DocumentationNode(fqName.substringAfterLast(".", fqName), Content.Empty, kind).let { node ->
    val pkg = fqName.substringBeforeLast(".", "")
    if (pkg.isNotEmpty()) {
        node.append(DocumentationNode(pkg, Content.Empty, DocumentationNode.Kind.Package), DocumentationReference.Kind.Owner)
    }

    node
}

open class ExecutableMemberAdapter(module: ModuleNodeAdapter, val node: DocumentationNode) : DocumentationNodeAdapter(module, node), ProgramElementDoc by ProgramElementAdapter(module, node), ExecutableMemberDoc {

    override fun isSynthetic(): Boolean = false
    override fun isNative(): Boolean = node.annotations.any { it.name == "native" }

    override fun thrownExceptions(): Array<out ClassDoc> = emptyArray() // TODO
    override fun throwsTags(): Array<out ThrowsTag> =
            node.content.sections
                    .filter { it.tag == "Exceptions" }
                    .map { it.subjectName }
                    .filterNotNull()
                    .map { ThrowsTagAdapter(this, ClassDocumentationNodeAdapter(module, classOf(it, DocumentationNode.Kind.Exception))) }
                    .toTypedArray()

    override fun isVarArgs(): Boolean = node.details(DocumentationNode.Kind.Parameter).any { false } // TODO

    override fun isSynchronized(): Boolean = node.annotations.any { it.name == "synchronized" }
    override fun paramTags(): Array<out ParamTag> = node.details(DocumentationNode.Kind.Parameter).filter { it.content.summary !is ContentEmpty || it.content.description !is ContentEmpty || it.content.sections.isNotEmpty() }.map {
        ParamTagAdapter(module, this, it.name, false, it.content.children)
    }.toTypedArray()

    override fun thrownExceptionTypes(): Array<out Type> = emptyArray()
    override fun receiverType(): Type? = receiverNode()?.let { receiver -> TypeAdapter(module, receiver) }
    override fun flatSignature(): String = node.details(DocumentationNode.Kind.Parameter).map { JavaLanguageService().renderType(it) }.joinToString(", ", "(", ")")
    override fun signature(): String = node.details(DocumentationNode.Kind.Parameter).map { JavaLanguageService().renderType(it) }.joinToString(", ", "(", ")") // TODO it should be FQ types

    override fun parameters(): Array<out Parameter> =
            ((receiverNode()?.let { receiver -> listOf<Parameter>(ReceiverParameterAdapter(module, receiver)) } ?: emptyList())
                    + node.details(DocumentationNode.Kind.Parameter).map { ParameterAdapter(module, it) }
                    ).toTypedArray()

    override fun typeParameters(): Array<out TypeVariable> = node.details(DocumentationNode.Kind.TypeParameter).map { TypeVariableAdapter(module, it) }.toTypedArray()

    override fun typeParamTags(): Array<out ParamTag> = node.details(DocumentationNode.Kind.TypeParameter).filter { it.content.summary !is ContentEmpty || it.content.description !is ContentEmpty || it.content.sections.isNotEmpty() }.map {
        ParamTagAdapter(module, this, it.name, true, it.content.children)
    }.toTypedArray()

    private fun receiverNode() = node.details(DocumentationNode.Kind.Receiver).let { receivers ->
        when {
            receivers.isNotEmpty() -> receivers.single().detail(DocumentationNode.Kind.Type)
            else -> null
        }
    }
}

class ConstructorAdapter(module: ModuleNodeAdapter, node: DocumentationNode) : ExecutableMemberAdapter(module, node), ConstructorDoc {
    override fun name(): String = node.owner?.name ?: throw IllegalStateException("No owner for $node")
}

class MethodAdapter(module: ModuleNodeAdapter, val node: DocumentationNode) : DocumentationNodeAdapter(module, node), ExecutableMemberDoc by ExecutableMemberAdapter(module, node), MethodDoc {
    override fun overrides(meth: MethodDoc?): Boolean = false // TODO

    override fun overriddenType(): Type? = node.overrides.firstOrNull()?.owner?.let { owner -> TypeAdapter(module, owner) }

    override fun overriddenMethod(): MethodDoc? = node.overrides.map { MethodAdapter(module, it) }.firstOrNull()
    override fun overriddenClass(): ClassDoc? = overriddenMethod()?.containingClass()

    override fun isAbstract(): Boolean = false // TODO

    override fun isDefault(): Boolean = false

    override fun returnType(): Type = TypeAdapter(module, node.detail(DocumentationNode.Kind.Type))
}

class FieldAdapter(module: ModuleNodeAdapter, val node: DocumentationNode) : DocumentationNodeAdapter(module, node), ProgramElementDoc by ProgramElementAdapter(module, node), FieldDoc {
    override fun isSynthetic(): Boolean = false

    override fun constantValueExpression(): String? = null // TODO
    override fun constantValue(): Any? = null

    override fun type(): Type = TypeAdapter(module, node.detail(DocumentationNode.Kind.Type))
    override fun isTransient(): Boolean = false // TODO
    override fun serialFieldTags(): Array<out SerialFieldTag> = emptyArray()

    override fun isVolatile(): Boolean = false // TODO
}

open class ClassDocumentationNodeAdapter(module: ModuleNodeAdapter, val classNode: DocumentationNode) : DocumentationNodeAdapter(module, classNode), Type by TypeAdapter(module, classNode), ProgramElementDoc by ProgramElementAdapter(module, classNode), ClassDoc {
    override fun constructors(filter: Boolean): Array<out ConstructorDoc> = classNode.members(DocumentationNode.Kind.Constructor).map { ConstructorAdapter(module, it) }.toTypedArray()
    override fun constructors(): Array<out ConstructorDoc> = constructors(true)
    override fun importedPackages(): Array<out PackageDoc> = emptyArray()
    override fun importedClasses(): Array<out ClassDoc>? = emptyArray()
    override fun typeParameters(): Array<out TypeVariable> = classNode.details(DocumentationNode.Kind.TypeParameter).map { TypeVariableAdapter(module, it) }.toTypedArray()
    override fun asTypeVariable(): TypeVariable? = if (classNode.kind == DocumentationNode.Kind.Class) TypeVariableAdapter(module, classNode) else null
    override fun isExternalizable(): Boolean = interfaces().any { it.qualifiedName() == "java.io.Externalizable" }
    override fun definesSerializableFields(): Boolean = false
    override fun methods(filter: Boolean): Array<out MethodDoc> = classNode.members(DocumentationNode.Kind.Function).map { MethodAdapter(module, it) }.toTypedArray() // TODO include get/set methods
    override fun methods(): Array<out MethodDoc> = methods(true)
    override fun enumConstants(): Array<out FieldDoc>? = classNode.members(DocumentationNode.Kind.EnumItem).map { FieldAdapter(module, it) }.toTypedArray()
    override fun isAbstract(): Boolean = classNode.details(DocumentationNode.Kind.Modifier).any { it.name == "abstract" }
    override fun interfaceTypes(): Array<out Type> = classNode.lookupSuperClasses(module)
            .filter { it.kind == DocumentationNode.Kind.Interface }
            .map { ClassDocumentationNodeAdapter(module, it) }
            .toTypedArray()

    override fun interfaces(): Array<out ClassDoc> = classNode.lookupSuperClasses(module)
            .filter { it.kind == DocumentationNode.Kind.Interface }
            .map { ClassDocumentationNodeAdapter(module, it) }
            .toTypedArray()

    override fun typeParamTags(): Array<out ParamTag> = (classNode.details(DocumentationNode.Kind.TypeParameter).filter { it.content.summary !is ContentEmpty || it.content.description !is ContentEmpty || it.content.sections.isNotEmpty() }.map {
        ParamTagAdapter(module, this, it.name, true, it.content.children)
    } + classNode.content.sections.filter { it.subjectName in typeParameters().map { it.simpleTypeName() } }.map {
        ParamTagAdapter(module, this, it.subjectName ?: "?", true, it.children)
    }).toTypedArray()

    override fun fields(): Array<out FieldDoc> = emptyArray()
    override fun fields(filter: Boolean): Array<out FieldDoc> = emptyArray()

    override fun findClass(className: String?): ClassDoc? = null // TODO !!!
    override fun serializableFields(): Array<out FieldDoc> = emptyArray()
    override fun superclassType(): Type? = classNode.lookupSuperClasses(module).singleOrNull { it.kind == DocumentationNode.Kind.Class }?.let { ClassDocumentationNodeAdapter(module, it) }
    override fun serializationMethods(): Array<out MethodDoc> = emptyArray() // TODO
    override fun superclass(): ClassDoc? = classNode.lookupSuperClasses(module).singleOrNull { it.kind == DocumentationNode.Kind.Class }?.let { ClassDocumentationNodeAdapter(module, it) }
    override fun isSerializable(): Boolean = false // TODO
    override fun subclassOf(cd: ClassDoc?): Boolean {
        if (cd == null) {
            return false
        }

        val expectedFQName = cd.qualifiedName()
        val types = arrayListOf(classNode)
        val visitedTypes = HashSet<String>()

        while (types.isNotEmpty()) {
            val type = types.remove(types.lastIndex)
            val fqName = type.qualifiedName

            if (expectedFQName == fqName) {
                return true
            }

            visitedTypes.add(fqName)
            types.addAll(type.details(DocumentationNode.Kind.Supertype).filter { it.qualifiedName !in visitedTypes })
        }

        return false
    }

    override fun innerClasses(): Array<out ClassDoc> = classNode.members(DocumentationNode.Kind.Class).map { ClassDocumentationNodeAdapter(module, it) }.toTypedArray()
    override fun innerClasses(filter: Boolean): Array<out ClassDoc> = innerClasses()
}

class PackageFacadeAdapter(val module: ModuleNodeAdapter, val packageNode: DocumentationNode) : ProgramElementDoc by ProgramElementAdapter(module, packageNode), ClassDoc {
    override fun simpleTypeName(): String = packageNode.name.substringAfterLast(".", packageNode.name).capitalize() + "Package"
    override fun typeName(): String = simpleTypeName()
    override fun qualifiedTypeName(): String = packageNode.name.split(".").let { parts -> parts.take(parts.size() - 1) + parts.takeLast(1).map { it.capitalize() + "Package" } }.joinToString(".")
    override fun qualifiedName(): String = qualifiedTypeName()
    override fun name(): String = simpleTypeName()

    override fun isPrimitive(): Boolean = false
    override fun dimension(): String = ""
    override fun getElementType(): Type? = null
    override fun asParameterizedType(): ParameterizedType? = null
    override fun asClassDoc(): ClassDoc = this
    override fun asAnnotationTypeDoc(): AnnotationTypeDoc? = null
    override fun asAnnotatedType(): AnnotatedType? = null
    override fun asWildcardType(): WildcardType? = null
    override fun asTypeVariable(): TypeVariable? = null
    override fun importedPackages(): Array<out PackageDoc> = emptyArray()
    override fun typeParameters(): Array<out TypeVariable> = emptyArray()
    override fun importedClasses(): Array<out ClassDoc> = emptyArray()
    override fun isExternalizable(): Boolean = false
    override fun definesSerializableFields(): Boolean = false
    override fun methods(): Array<out MethodDoc> = members(DocumentationNode.Kind.Function).map { MethodAdapter(module, it) }.toTypedArray()
    override fun fields(): Array<out FieldDoc> = members(DocumentationNode.Kind.Property).map { FieldAdapter(module, it) }.toTypedArray()
    override fun methods(filter: Boolean): Array<out MethodDoc> = methods()
    override fun fields(filter: Boolean): Array<out FieldDoc> = fields()
    override fun constructors(): Array<out ConstructorDoc> = emptyArray()
    override fun constructors(filter: Boolean): Array<out ConstructorDoc> = constructors()
    override fun enumConstants(): Array<out FieldDoc> = emptyArray()
    override fun isAbstract(): Boolean = false
    override fun interfaceTypes(): Array<out Type> = emptyArray()
    override fun interfaces(): Array<out ClassDoc> = emptyArray()
    override fun typeParamTags(): Array<out ParamTag> = emptyArray()
    override fun findClass(className: String?): ClassDoc? = null // TODO ???
    override fun serializableFields(): Array<out FieldDoc> = emptyArray()
    override fun superclassType(): Type? = null
    override fun serializationMethods(): Array<out MethodDoc> = emptyArray()
    override fun superclass(): ClassDoc? = null
    override fun isSerializable(): Boolean = false
    override fun subclassOf(cd: ClassDoc?): Boolean = false
    override fun innerClasses(): Array<out ClassDoc> = emptyArray()
    override fun innerClasses(filter: Boolean): Array<out ClassDoc> = innerClasses()
    override fun isOrdinaryClass(): Boolean = true
    override fun isClass(): Boolean = true

    private fun members(kind: DocumentationNode.Kind) = packageNode.members(kind) + packageNode.members(DocumentationNode.Kind.ExternalClass).flatMap { it.members(kind) }
}

fun DocumentationNode.lookupSuperClasses(module: ModuleNodeAdapter) =
        details(DocumentationNode.Kind.Supertype)
                .map { it.links.firstOrNull() }
                .map { module.allTypes[it?.qualifiedName] }
                .filterNotNull()

class ModuleNodeAdapter(val module: DocumentationModule, val reporter: DocErrorReporter, val outputPath: String) : DocumentationNodeBareAdapter(module), DocErrorReporter by reporter, RootDoc {
    val allPackages = module.members(DocumentationNode.Kind.Package).toMap { it.name }
    val allTypes = module.members(DocumentationNode.Kind.Package)
            .flatMap { it.members(DocumentationNode.Kind.Class) + it.members(DocumentationNode.Kind.Interface) + it.members(DocumentationNode.Kind.Enum) }
            .toMap { it.qualifiedName }
    val packageFacades = module.members(DocumentationNode.Kind.Package).map { PackageFacadeAdapter(this, it) }.toMap { it.qualifiedName() }

    override fun packageNamed(name: String?): PackageDoc? = allPackages[name]?.let { PackageAdapter(this, it) }

    override fun classes(): Array<out ClassDoc> =
            (allTypes.values().map { ClassDocumentationNodeAdapter(this, it) } + packageFacades.values())
                    .toTypedArray()

    override fun options(): Array<out Array<String>> = arrayOf(
            arrayOf("-d", outputPath),
            arrayOf("-docencoding", "UTF-8"),
            arrayOf("-charset", "UTF-8"),
            arrayOf("-keywords")
    )

    override fun specifiedPackages(): Array<out PackageDoc>? = module.members(DocumentationNode.Kind.Package).map { PackageAdapter(this, it) }.toTypedArray()

    override fun classNamed(qualifiedName: String?): ClassDoc? =
            allTypes[qualifiedName]?.let { ClassDocumentationNodeAdapter(this, it) }
                    ?: packageFacades[qualifiedName]

    override fun specifiedClasses(): Array<out ClassDoc> = classes()
}