package net.corda.nodeapi.internal.serialization.carpenter

import net.corda.core.serialization.CordaSerializable
import net.corda.nodeapi.internal.serialization.amqp.DeserializationInput
import org.junit.Test
import kotlin.test.*

@CordaSerializable
interface J {
    val j: Int
}

@CordaSerializable
interface I {
    val i: Int
}

@CordaSerializable
interface II {
    val ii: Int
}

@CordaSerializable
interface III : I {
    val iii: Int
    override val i: Int
}

@CordaSerializable
interface IIII {
    val iiii: Int
    val i: I
}

class InheritanceSchemaToClassCarpenterTests : AmqpCarpenterBase() {
    @Test
    fun interfaceParent1() {
        class A(override val j: Int) : J

        val testJ = 20
        val a = A(testJ)

        assertEquals(testJ, a.j)
        val obj = DeserializationInput(factory).deserializeAndReturnEnvelope(serialise(a))
        assertTrue(obj.obj is A)
        val serSchema = obj.envelope.schema
        assertEquals(2, serSchema.types.size)
        val l1 = serSchema.carpenterSchema(ClassLoader.getSystemClassLoader())

        // since we're using an envelope generated by seilaising classes defined locally
        // it's extremely unlikely we'd need to carpent any classes
        assertEquals(0, l1.size)

        val mangleSchema = serSchema.mangleNames(listOf(classTestName("A")))
        val l2 = mangleSchema.carpenterSchema(ClassLoader.getSystemClassLoader())
        assertEquals(1, l2.size)

        val aSchema = l2.carpenterSchemas.find { it.name == mangleName(classTestName("A")) }
        assertNotEquals(null, aSchema)
        assertEquals(mangleName(classTestName("A")), aSchema!!.name)
        assertEquals(1, aSchema.interfaces.size)
        assertEquals(J::class.java, aSchema.interfaces[0])

        val aBuilder = ClassCarpenter().build(aSchema)
        val objJ = aBuilder.constructors[0].newInstance(testJ)
        val j = objJ as J

        assertEquals(aBuilder.getMethod("getJ").invoke(objJ), testJ)
        assertEquals(a.j, j.j)
    }

    @Test
    fun interfaceParent2() {
        class A(override val j: Int, val jj: Int) : J

        val testJ = 20
        val testJJ = 40
        val a = A(testJ, testJJ)

        assertEquals(testJ, a.j)
        assertEquals(testJJ, a.jj)

        val obj = DeserializationInput(factory).deserializeAndReturnEnvelope(serialise(a))

        assertTrue(obj.obj is A)

        val serSchema = obj.envelope.schema

        assertEquals(2, serSchema.types.size)

        val l1 = serSchema.carpenterSchema(ClassLoader.getSystemClassLoader())

        assertEquals(0, l1.size)

        val mangleSchema = serSchema.mangleNames(listOf(classTestName("A")))
        val aName = mangleName(classTestName("A"))
        val l2 = mangleSchema.carpenterSchema(ClassLoader.getSystemClassLoader())

        assertEquals(1, l2.size)

        val aSchema = l2.carpenterSchemas.find { it.name == aName }

        assertNotEquals(null, aSchema)

        assertEquals(aName, aSchema!!.name)
        assertEquals(1, aSchema.interfaces.size)
        assertEquals(J::class.java, aSchema.interfaces[0])

        val aBuilder = ClassCarpenter().build(aSchema)
        val objJ = aBuilder.constructors[0].newInstance(testJ, testJJ)
        val j = objJ as J

        assertEquals(aBuilder.getMethod("getJ").invoke(objJ), testJ)
        assertEquals(aBuilder.getMethod("getJj").invoke(objJ), testJJ)

        assertEquals(a.j, j.j)
    }

    @Test
    fun multipleInterfaces() {
        val testI = 20
        val testII = 40

        class A(override val i: Int, override val ii: Int) : I, II

        val a = A(testI, testII)
        val obj = DeserializationInput(factory).deserializeAndReturnEnvelope(serialise(a))

        assertTrue(obj.obj is A)

        val serSchema = obj.envelope.schema

        assertEquals(3, serSchema.types.size)

        val l1 = serSchema.carpenterSchema(ClassLoader.getSystemClassLoader())

        // since we're using an envelope generated by serialising classes defined locally
        //  it's extremely unlikely we'd need to carpent any classes
        assertEquals(0, l1.size)

        // pretend we don't know the class we've been sent, i.e. it's unknown to the class loader, and thus
        // needs some carpentry
        val mangleSchema = serSchema.mangleNames(listOf(classTestName("A")))
        val l2 = mangleSchema.carpenterSchema(ClassLoader.getSystemClassLoader())
        val aName = mangleName(classTestName("A"))

        assertEquals(1, l2.size)

        val aSchema = l2.carpenterSchemas.find { it.name == aName }

        assertNotEquals(null, aSchema)
        assertEquals(aName, aSchema!!.name)
        assertEquals(2, aSchema.interfaces.size)
        assertTrue(I::class.java in aSchema.interfaces)
        assertTrue(II::class.java in aSchema.interfaces)

        val aBuilder = ClassCarpenter().build(aSchema)
        val objA = aBuilder.constructors[0].newInstance(testI, testII)
        val i = objA as I
        val ii = objA as II

        assertEquals(aBuilder.getMethod("getI").invoke(objA), testI)
        assertEquals(aBuilder.getMethod("getIi").invoke(objA), testII)
        assertEquals(a.i, i.i)
        assertEquals(a.ii, ii.ii)
    }

    @Test
    fun nestedInterfaces() {
        class A(override val i: Int, override val iii: Int) : III

        val testI = 20
        val testIII = 60
        val a = A(testI, testIII)
        val obj = DeserializationInput(factory).deserializeAndReturnEnvelope(serialise(a))

        assertTrue(obj.obj is A)

        val serSchema = obj.envelope.schema

        assertEquals(3, serSchema.types.size)

        val l1 = serSchema.carpenterSchema(ClassLoader.getSystemClassLoader())

        // since we're using an envelope generated by serialising classes defined locally
        // it's extremely unlikely we'd need to carpent any classes
        assertEquals(0, l1.size)

        val mangleSchema = serSchema.mangleNames(listOf(classTestName("A")))
        val l2 = mangleSchema.carpenterSchema(ClassLoader.getSystemClassLoader())
        val aName = mangleName(classTestName("A"))

        assertEquals(1, l2.size)

        val aSchema = l2.carpenterSchemas.find { it.name == aName }

        assertNotEquals(null, aSchema)
        assertEquals(aName, aSchema!!.name)
        assertEquals(2, aSchema.interfaces.size)
        assertTrue(I::class.java in aSchema.interfaces)
        assertTrue(III::class.java in aSchema.interfaces)

        val aBuilder = ClassCarpenter().build(aSchema)
        val objA = aBuilder.constructors[0].newInstance(testI, testIII)
        val i = objA as I
        val iii = objA as III

        assertEquals(aBuilder.getMethod("getI").invoke(objA), testI)
        assertEquals(aBuilder.getMethod("getIii").invoke(objA), testIII)
        assertEquals(a.i, i.i)
        assertEquals(a.i, iii.i)
        assertEquals(a.iii, iii.iii)
    }

    @Test
    fun memberInterface() {
        class A(override val i: Int) : I
        class B(override val i: I, override val iiii: Int) : IIII

        val testI = 25
        val testIIII = 50
        val a = A(testI)
        val b = B(a, testIIII)
        val obj = DeserializationInput(factory).deserializeAndReturnEnvelope(serialise(b))

        assertTrue(obj.obj is B)

        val serSchema = obj.envelope.schema

        // Expected classes are
        //      * class A
        //      * class A's interface (class I)
        //      * class B
        //      * class B's interface (class IIII)
        assertEquals(4, serSchema.types.size)

        val mangleSchema = serSchema.mangleNames(listOf(classTestName("A"), classTestName("B")))
        val cSchema = mangleSchema.carpenterSchema(ClassLoader.getSystemClassLoader())
        val aName = mangleName(classTestName("A"))
        val bName = mangleName(classTestName("B"))

        assertEquals(2, cSchema.size)

        val aCarpenterSchema = cSchema.carpenterSchemas.find { it.name == aName }
        val bCarpenterSchema = cSchema.carpenterSchemas.find { it.name == bName }

        assertNotEquals(null, aCarpenterSchema)
        assertNotEquals(null, bCarpenterSchema)

        val cc = ClassCarpenter()
        val cc2 = ClassCarpenter()
        val bBuilder = cc.build(bCarpenterSchema!!)
        bBuilder.constructors[0].newInstance(a, testIIII)

        val aBuilder = cc.build(aCarpenterSchema!!)
        val objA = aBuilder.constructors[0].newInstance(testI)

        // build a second B this time using our constructed instance of A and not the
        // local one we pre defined
        bBuilder.constructors[0].newInstance(objA, testIIII)

        // whittle and instantiate a different A with a new class loader
        val aBuilder2 = cc2.build(aCarpenterSchema)
        val objA2 = aBuilder2.constructors[0].newInstance(testI)

        bBuilder.constructors[0].newInstance(objA2, testIIII)
    }

    // if we remove the nested interface we should get an error as it's impossible
    //   to have a concrete class loaded without having access to all of it's elements
    @Test(expected = UncarpentableException::class)
    fun memberInterface2() {
        class A(override val i: Int) : I
        class B(override val i: I, override val iiii: Int) : IIII

        val testI = 25
        val testIIII = 50
        val a = A(testI)
        val b = B(a, testIIII)
        val obj = DeserializationInput(factory).deserializeAndReturnEnvelope(serialise(b))

        assertTrue(obj.obj is B)

        val serSchema = obj.envelope.schema

        // The classes we're expecting to find:
        //      * class A
        //      * class A's interface (class I)
        //      * class B
        //      * class B's interface (class IIII)
        assertEquals(4, serSchema.types.size)

        // ignore the return as we expect this to throw
        serSchema.mangleNames(listOf(
                classTestName("A"), "${this.javaClass.`package`.name}.I")).carpenterSchema(ClassLoader.getSystemClassLoader())
    }

    @Test
    fun interfaceAndImplementation() {
        class A(override val i: Int) : I

        val testI = 25
        val a = A(testI)
        val obj = DeserializationInput(factory).deserializeAndReturnEnvelope(serialise(a))

        assertTrue(obj.obj is A)

        val serSchema = obj.envelope.schema

        // The classes we're expecting to find:
        //      * class A
        //      * class A's interface (class I)
        assertEquals(2, serSchema.types.size)

        val amqpSchema = serSchema.mangleNames(listOf(classTestName("A"), "${this.javaClass.`package`.name}.I"))
        val aName = mangleName(classTestName("A"))
        val iName = mangleName("${this.javaClass.`package`.name}.I")
        val carpenterSchema = amqpSchema.carpenterSchema(ClassLoader.getSystemClassLoader())

        // whilst there are two unknown classes within the envelope A depends on I so we can't construct a
        // schema for A until we have for I
        assertEquals(1, carpenterSchema.size)
        assertNotEquals(null, carpenterSchema.carpenterSchemas.find { it.name == iName })

        // since we can't build A it should list I as a dependency
        assertTrue(aName in carpenterSchema.dependencies)
        assertEquals(1, carpenterSchema.dependencies[aName]!!.second.size)
        assertEquals(iName, carpenterSchema.dependencies[aName]!!.second[0])

        // and conversly I should have A listed as a dependent
        assertTrue(iName in carpenterSchema.dependsOn)
        assertEquals(1, carpenterSchema.dependsOn[iName]!!.size)
        assertEquals(aName, carpenterSchema.dependsOn[iName]!![0])

        val mc = MetaCarpenter(carpenterSchema)
        mc.build()

        assertEquals(0, mc.schemas.carpenterSchemas.size)
        assertEquals(0, mc.schemas.dependencies.size)
        assertEquals(0, mc.schemas.dependsOn.size)
        assertEquals(2, mc.objects.size)
        assertTrue(aName in mc.objects)
        assertTrue(iName in mc.objects)

        mc.objects[aName]!!.constructors[0].newInstance(testI)
    }

    @Test
    fun twoInterfacesAndImplementation() {
        class A(override val i: Int, override val ii: Int) : I, II

        val testI = 69
        val testII = 96
        val a = A(testI, testII)
        val obj = DeserializationInput(factory).deserializeAndReturnEnvelope(serialise(a))

        val amqpSchema = obj.envelope.schema.mangleNames(listOf(
                classTestName("A"),
                "${this.javaClass.`package`.name}.I",
                "${this.javaClass.`package`.name}.II"))

        val aName = mangleName(classTestName("A"))
        val iName = mangleName("${this.javaClass.`package`.name}.I")
        val iiName = mangleName("${this.javaClass.`package`.name}.II")
        val carpenterSchema = amqpSchema.carpenterSchema(ClassLoader.getSystemClassLoader())

        // there is nothing preventing us from carpenting up the two interfaces so
        // our initial list should contain both interface with A being dependent on both
        // and each having A as a dependent
        assertEquals(2, carpenterSchema.carpenterSchemas.size)
        assertNotNull(carpenterSchema.carpenterSchemas.find { it.name == iName })
        assertNotNull(carpenterSchema.carpenterSchemas.find { it.name == iiName })
        assertNull(carpenterSchema.carpenterSchemas.find { it.name == aName })

        assertTrue(iName in carpenterSchema.dependsOn)
        assertEquals(1, carpenterSchema.dependsOn[iName]?.size)
        assertNotNull(carpenterSchema.dependsOn[iName]?.find({ it == aName }))

        assertTrue(iiName in carpenterSchema.dependsOn)
        assertEquals(1, carpenterSchema.dependsOn[iiName]?.size)
        assertNotNull(carpenterSchema.dependsOn[iiName]?.find { it == aName })

        assertTrue(aName in carpenterSchema.dependencies)
        assertEquals(2, carpenterSchema.dependencies[aName]!!.second.size)
        assertNotNull(carpenterSchema.dependencies[aName]!!.second.find { it == iName })
        assertNotNull(carpenterSchema.dependencies[aName]!!.second.find { it == iiName })

        val mc = MetaCarpenter(carpenterSchema)
        mc.build()

        assertEquals(0, mc.schemas.carpenterSchemas.size)
        assertEquals(0, mc.schemas.dependencies.size)
        assertEquals(0, mc.schemas.dependsOn.size)
        assertEquals(3, mc.objects.size)
        assertTrue(aName in mc.objects)
        assertTrue(iName in mc.objects)
        assertTrue(iiName in mc.objects)
    }

    @Test
    fun nestedInterfacesAndImplementation() {
        class A(override val i: Int, override val iii: Int) : III

        val testI = 7
        val testIII = 11
        val a = A(testI, testIII)
        val obj = DeserializationInput(factory).deserializeAndReturnEnvelope(serialise(a))

        val amqpSchema = obj.envelope.schema.mangleNames(listOf(
                classTestName("A"),
                "${this.javaClass.`package`.name}.I",
                "${this.javaClass.`package`.name}.III"))

        val aName = mangleName(classTestName("A"))
        val iName = mangleName("${this.javaClass.`package`.name}.I")
        val iiiName = mangleName("${this.javaClass.`package`.name}.III")
        val carpenterSchema = amqpSchema.carpenterSchema(ClassLoader.getSystemClassLoader())

        // Since A depends on III and III extends I we will have to construct them
        // in that reverse order (I -> III -> A)
        assertEquals(1, carpenterSchema.carpenterSchemas.size)
        assertNotNull(carpenterSchema.carpenterSchemas.find { it.name == iName })
        assertNull(carpenterSchema.carpenterSchemas.find { it.name == iiiName })
        assertNull(carpenterSchema.carpenterSchemas.find { it.name == aName })

        // I has III as a direct dependent and A as an indirect one
        assertTrue(iName in carpenterSchema.dependsOn)
        assertEquals(2, carpenterSchema.dependsOn[iName]?.size)
        assertNotNull(carpenterSchema.dependsOn[iName]?.find({ it == iiiName }))
        assertNotNull(carpenterSchema.dependsOn[iName]?.find({ it == aName }))

        // III has A as a dependent
        assertTrue(iiiName in carpenterSchema.dependsOn)
        assertEquals(1, carpenterSchema.dependsOn[iiiName]?.size)
        assertNotNull(carpenterSchema.dependsOn[iiiName]?.find { it == aName })

        // conversly III depends on I
        assertTrue(iiiName in carpenterSchema.dependencies)
        assertEquals(1, carpenterSchema.dependencies[iiiName]!!.second.size)
        assertNotNull(carpenterSchema.dependencies[iiiName]!!.second.find { it == iName })

        // and A depends on III and I
        assertTrue(aName in carpenterSchema.dependencies)
        assertEquals(2, carpenterSchema.dependencies[aName]!!.second.size)
        assertNotNull(carpenterSchema.dependencies[aName]!!.second.find { it == iiiName })
        assertNotNull(carpenterSchema.dependencies[aName]!!.second.find { it == iName })

        val mc = MetaCarpenter(carpenterSchema)
        mc.build()

        assertEquals(0, mc.schemas.carpenterSchemas.size)
        assertEquals(0, mc.schemas.dependencies.size)
        assertEquals(0, mc.schemas.dependsOn.size)
        assertEquals(3, mc.objects.size)
        assertTrue(aName in mc.objects)
        assertTrue(iName in mc.objects)
        assertTrue(iiiName in mc.objects)
    }
}
