package il65tests

import il65.ast.DataType
import il65.ast.VarDecl
import il65.ast.VarDeclType
import il65.compiler.*
import org.hamcrest.MatcherAssert.assertThat
import org.hamcrest.Matchers.closeTo
import org.hamcrest.Matchers.equalTo
import org.junit.jupiter.api.Test
import org.junit.jupiter.api.TestInstance
import kotlin.test.assertEquals
import kotlin.test.assertFailsWith


@TestInstance(TestInstance.Lifecycle.PER_CLASS)
class TestCompiler {
    @Test
    fun testToHex() {
        assertEquals("0", 0.toHex())
        assertEquals("1", 1.toHex())
        assertEquals("1", 1.234.toHex())
        assertEquals("10", 10.toHex())
        assertEquals("10", 10.99.toHex())
        assertEquals("15", 15.toHex())
        assertEquals("$10", 16.toHex())
        assertEquals("\$ff", 255.toHex())
        assertEquals("$0100", 256.toHex())
        assertEquals("$4e5c", 20060.toHex())
        assertEquals("\$ffff", 65535.toHex())
        assertEquals("\$ffff", 65535L.toHex())
        assertFailsWith<CompilerException> { 65536.toHex()  }
        assertFailsWith<CompilerException> { (-1).toHex()  }
        assertFailsWith<CompilerException> { (-1.99).toHex()  }
    }


    @Test
    fun testFloatToMflpt5() {
        assertThat(Mflpt5.fromNumber(0), equalTo(Mflpt5(0x00, 0x00, 0x00, 0x00, 0x00)))
        assertThat(Mflpt5.fromNumber(3.141592653), equalTo(Mflpt5(0x82, 0x49, 0x0F, 0xDA, 0xA1)))
        assertThat(Mflpt5.fromNumber(3.141592653589793), equalTo(Mflpt5(0x82, 0x49, 0x0F, 0xDA, 0xA2)))
        assertThat(Mflpt5.fromNumber(32768), equalTo(Mflpt5(0x90, 0x00, 0x00, 0x00, 0x00)))
        assertThat(Mflpt5.fromNumber(-32768), equalTo(Mflpt5(0x90, 0x80, 0x00, 0x00, 0x00)))
        assertThat(Mflpt5.fromNumber(1), equalTo(Mflpt5(0x81, 0x00, 0x00, 0x00, 0x00)))
        assertThat(Mflpt5.fromNumber(0.7071067812), equalTo(Mflpt5(0x80, 0x35, 0x04, 0xF3, 0x34)))
        assertThat(Mflpt5.fromNumber(0.7071067811865476), equalTo(Mflpt5(0x80, 0x35, 0x04, 0xF3, 0x33)))
        assertThat(Mflpt5.fromNumber(1.4142135624), equalTo(Mflpt5(0x81, 0x35, 0x04, 0xF3, 0x34)))
        assertThat(Mflpt5.fromNumber(1.4142135623730951), equalTo(Mflpt5(0x81, 0x35, 0x04, 0xF3, 0x33)))
        assertThat(Mflpt5.fromNumber(-.5), equalTo(Mflpt5(0x80, 0x80, 0x00, 0x00, 0x00)))
        assertThat(Mflpt5.fromNumber(0.69314718061), equalTo(Mflpt5(0x80, 0x31, 0x72, 0x17, 0xF8)))
        assertThat(Mflpt5.fromNumber(0.6931471805599453), equalTo(Mflpt5(0x80, 0x31, 0x72, 0x17, 0xF7)))
        assertThat(Mflpt5.fromNumber(10), equalTo(Mflpt5(0x84, 0x20, 0x00, 0x00, 0x00)))
        assertThat(Mflpt5.fromNumber(1000000000), equalTo(Mflpt5(0x9E, 0x6E, 0x6B, 0x28, 0x00)))
        assertThat(Mflpt5.fromNumber(.5), equalTo(Mflpt5(0x80, 0x00, 0x00, 0x00, 0x00)))
        assertThat(Mflpt5.fromNumber(1.4426950408889634), equalTo(Mflpt5(0x81, 0x38, 0xAA, 0x3B, 0x29)))
        assertThat(Mflpt5.fromNumber(1.5707963267948966), equalTo(Mflpt5(0x81, 0x49, 0x0F, 0xDA, 0xA2)))
        assertThat(Mflpt5.fromNumber(6.283185307179586), equalTo(Mflpt5(0x83, 0x49, 0x0F, 0xDA, 0xA2)))
        assertThat(Mflpt5.fromNumber(.25), equalTo(Mflpt5(0x7F, 0x00, 0x00, 0x00, 0x00)))
        assertThat(Mflpt5.fromNumber(123.45678e22), equalTo(Mflpt5(0xd1, 0x02, 0xb7, 0x06, 0xfb)))
        assertThat(Mflpt5.fromNumber(-123.45678e-22), equalTo(Mflpt5(0x3e, 0xe9, 0x34, 0x09, 0x1b)))
    }

    @Test
    fun testFloatRange() {
        assertThat(Mflpt5.fromNumber(FLOAT_MAX_POSITIVE), equalTo(Mflpt5(0xff, 0x7f, 0xff, 0xff, 0xff)))
        assertThat(Mflpt5.fromNumber(FLOAT_MAX_NEGATIVE), equalTo(Mflpt5(0xff, 0xff, 0xff, 0xff, 0xff)))
        assertThat(Mflpt5.fromNumber(1.7e-38), equalTo(Mflpt5(0x03, 0x39, 0x1d, 0x15, 0x63)))
        assertThat(Mflpt5.fromNumber(1.7e-39), equalTo(Mflpt5(0x00, 0x00, 0x00, 0x00, 0x00)))
        assertThat(Mflpt5.fromNumber(-1.7e-38), equalTo(Mflpt5(0x03, 0xb9, 0x1d, 0x15, 0x63)))
        assertThat(Mflpt5.fromNumber(-1.7e-39), equalTo(Mflpt5(0x00, 0x00, 0x00, 0x00, 0x00)))
        assertFailsWith<CompilerException> { Mflpt5.fromNumber(1.7014118346e+38) }
        assertFailsWith<CompilerException> { Mflpt5.fromNumber(-1.7014118346e+38) }
        assertFailsWith<CompilerException> { Mflpt5.fromNumber(1.7014118347e+38) }
        assertFailsWith<CompilerException> { Mflpt5.fromNumber(-1.7014118347e+38) }
    }

    @Test
    fun testMflpt5ToFloat() {
        val PRECISION=0.000000001
        assertThat(Mflpt5(0x00, 0x00, 0x00, 0x00, 0x00).toDouble(), equalTo(0.0))
        assertThat(Mflpt5(0x82, 0x49, 0x0F, 0xDA, 0xA1).toDouble(), closeTo(3.141592653, PRECISION))
        assertThat(Mflpt5(0x82, 0x49, 0x0F, 0xDA, 0xA2).toDouble(), closeTo(3.141592653589793, PRECISION))
        assertThat(Mflpt5(0x90, 0x00, 0x00, 0x00, 0x00).toDouble(), equalTo(32768.0))
        assertThat(Mflpt5(0x90, 0x80, 0x00, 0x00, 0x00).toDouble(), equalTo(-32768.0))
        assertThat(Mflpt5(0x81, 0x00, 0x00, 0x00, 0x00).toDouble(), equalTo(1.0))
        assertThat(Mflpt5(0x80, 0x35, 0x04, 0xF3, 0x34).toDouble(), closeTo(0.7071067812, PRECISION))
        assertThat(Mflpt5(0x80, 0x35, 0x04, 0xF3, 0x33).toDouble(), closeTo(0.7071067811865476, PRECISION))
        assertThat(Mflpt5(0x81, 0x35, 0x04, 0xF3, 0x34).toDouble(), closeTo(1.4142135624, PRECISION))
        assertThat(Mflpt5(0x81, 0x35, 0x04, 0xF3, 0x33).toDouble(), closeTo(1.4142135623730951, PRECISION))
        assertThat(Mflpt5(0x80, 0x80, 0x00, 0x00, 0x00).toDouble(), equalTo(-.5))
        assertThat(Mflpt5(0x80, 0x31, 0x72, 0x17, 0xF8).toDouble(), closeTo(0.69314718061, PRECISION))
        assertThat(Mflpt5(0x80, 0x31, 0x72, 0x17, 0xF7).toDouble(), closeTo(0.6931471805599453, PRECISION))
        assertThat(Mflpt5(0x84, 0x20, 0x00, 0x00, 0x00).toDouble(), equalTo(10.0))
        assertThat(Mflpt5(0x9E, 0x6E, 0x6B, 0x28, 0x00).toDouble(), equalTo(1000000000.0))
        assertThat(Mflpt5(0x80, 0x00, 0x00, 0x00, 0x00).toDouble(), equalTo(.5))
        assertThat(Mflpt5(0x81, 0x38, 0xAA, 0x3B, 0x29).toDouble(), closeTo(1.4426950408889634, PRECISION))
        assertThat(Mflpt5(0x81, 0x49, 0x0F, 0xDA, 0xA2).toDouble(), closeTo(1.5707963267948966, PRECISION))
        assertThat(Mflpt5(0x83, 0x49, 0x0F, 0xDA, 0xA2).toDouble(), closeTo(6.283185307179586, PRECISION))
        assertThat(Mflpt5(0x7F, 0x00, 0x00, 0x00, 0x00).toDouble(), equalTo(.25))
        assertThat(Mflpt5(0xd1, 0x02, 0xb7, 0x06, 0xfb).toDouble(), closeTo(123.45678e22, 1.0e15))
        assertThat(Mflpt5(0x3e, 0xe9, 0x34, 0x09, 0x1b).toDouble(), closeTo(-123.45678e-22, PRECISION))
    }
}


@TestInstance(TestInstance.Lifecycle.PER_CLASS)
class TestZeropage {
    @Test
    fun testNames() {
        val zp = Zeropage(CompilationOptions(OutputType.RAW, LauncherType.NONE, ZeropageType.COMPATIBLE, false))

        assertFailsWith<AssertionError> {
            zp.allocate(VarDecl(VarDeclType.MEMORY, DataType.BYTE, null, "", null))
        }

        zp.allocate(VarDecl(VarDeclType.VAR, DataType.BYTE, null, "", null))
        zp.allocate(VarDecl(VarDeclType.VAR, DataType.BYTE, null, "", null))
        zp.allocate(VarDecl(VarDeclType.VAR, DataType.BYTE, null, "varname", null))
        assertFailsWith<AssertionError> {
            zp.allocate(VarDecl(VarDeclType.VAR, DataType.BYTE, null, "varname", null))
        }
        zp.allocate(VarDecl(VarDeclType.VAR, DataType.BYTE, null, "varname2", null))
    }

    @Test
    fun testZpFloatEnable() {
        val zp = Zeropage(CompilationOptions(OutputType.RAW, LauncherType.NONE, ZeropageType.FULL, false))
        assertFailsWith<CompilerException> {
            zp.allocate(VarDecl(VarDeclType.VAR, DataType.FLOAT, null, "", null))
        }
        val zp2 = Zeropage(CompilationOptions(OutputType.RAW, LauncherType.NONE, ZeropageType.FULL, true))
        zp2.allocate(VarDecl(VarDeclType.VAR, DataType.FLOAT, null, "", null))
    }

    @Test
    fun testCompatibleAllocation() {
        val zp = Zeropage(CompilationOptions(OutputType.RAW, LauncherType.NONE, ZeropageType.COMPATIBLE, true))
        assert(zp.available() == 9)
        assertFailsWith<CompilerException> {
            // in regular zp there aren't 5 sequential bytes free
            zp.allocate(VarDecl(VarDeclType.VAR, DataType.FLOAT, null, "", null))
        }
        for (i in 0 until zp.available()) {
            val loc = zp.allocate(VarDecl(VarDeclType.VAR, DataType.BYTE, null, "", null))
            assert(loc > 0)
        }
        assert(zp.available() == 0)
        assertFailsWith<CompilerException> {
            zp.allocate(VarDecl(VarDeclType.VAR, DataType.BYTE, null, "", null))
        }
        assertFailsWith<CompilerException> {
            zp.allocate(VarDecl(VarDeclType.VAR, DataType.WORD, null, "", null))
        }
    }

    @Test
    fun testFullAllocation() {
        val zp = Zeropage(CompilationOptions(OutputType.RAW, LauncherType.NONE, ZeropageType.FULL, true))
        assert(zp.available() == 239)
        val loc = zp.allocate(VarDecl(VarDeclType.VAR, DataType.FLOAT, null, "", null))
        assert(loc > 3)
        assert(!zp.free.contains(loc))
        val num = zp.available() / 5
        val rest = zp.available() % 5

        for(i in 0..num-4) {
            zp.allocate(VarDecl(VarDeclType.VAR, DataType.FLOAT, null, "", null))
        }
        assert(zp.available() == 19)

        assertFailsWith<CompilerException> {
            // can't allocate because no more sequential bytes, only fragmented
            zp.allocate(VarDecl(VarDeclType.VAR, DataType.FLOAT, null, "", null))
        }

        for(i in 0..13) {
            zp.allocate(VarDecl(VarDeclType.VAR, DataType.BYTE, null, "", null))
        }
        zp.allocate(VarDecl(VarDeclType.VAR, DataType.WORD, null, "", null))
        zp.allocate(VarDecl(VarDeclType.VAR, DataType.WORD, null, "", null))

        assert(zp.available() == 1)
        zp.allocate(VarDecl(VarDeclType.VAR, DataType.BYTE, null, "", null))
        assertFailsWith<CompilerException> {
            // no more space
            zp.allocate(VarDecl(VarDeclType.VAR, DataType.BYTE, null, "", null))
        }
    }

    @Test
    fun testEfficientAllocation() {
        //  free = [0x04, 0x05, 0x06, 0x2a, 0x52, 0xf7, 0xf8, 0xf9, 0xfa]
        val zp = Zeropage(CompilationOptions(OutputType.RAW, LauncherType.NONE, ZeropageType.COMPATIBLE, true))
        assert(zp.available()==9)
        assert(0x2a == zp.allocate(VarDecl(VarDeclType.VAR, DataType.BYTE, null, "", null)))
        assert(0x52 == zp.allocate(VarDecl(VarDeclType.VAR, DataType.BYTE, null, "", null)))
        assert(0x04 == zp.allocate(VarDecl(VarDeclType.VAR, DataType.WORD, null, "", null)))
        assert(0xf7 == zp.allocate(VarDecl(VarDeclType.VAR, DataType.WORD, null, "", null)))
        assert(0x06 == zp.allocate(VarDecl(VarDeclType.VAR, DataType.BYTE, null, "", null)))
        assert(0xf9 == zp.allocate(VarDecl(VarDeclType.VAR, DataType.WORD, null, "", null)))
        assert(zp.available()==0)
    }
}


@TestInstance(TestInstance.Lifecycle.PER_CLASS)
class TestPetscii {

    @Test
    fun testLowercase() {
        assertThat(Petscii.encodePetscii("hello WORLD 123 @!£", true), equalTo(
                shortArrayOf(72, 69, 76, 76, 79, 32, 0xd7, 0xcf, 0xd2, 0xcc, 0xc4, 32, 49, 50, 51, 32, 64, 33, 0x5c)))
        assertThat(Petscii.encodePetscii("\uf11a", true), equalTo(shortArrayOf(0x12)))   // reverse vid
        assertThat(Petscii.encodePetscii("✓", true), equalTo(shortArrayOf(0xfa)))
        assertFailsWith<CompilerException> { Petscii.encodePetscii("π", true) }
        assertFailsWith<CompilerException> { Petscii.encodePetscii("♥", true) }

        assertThat(Petscii.decodePetscii(listOf(72, 0xd7, 0x5c, 0xfa, 0x12), true), equalTo("hW£✓\uF11A"))
        assertFailsWith<ArrayIndexOutOfBoundsException> { Petscii.decodePetscii(listOf(-1), true) }
        assertFailsWith<ArrayIndexOutOfBoundsException> { Petscii.decodePetscii(listOf(256), true) }
    }

    @Test
    fun testUppercase() {
        assertThat(Petscii.encodePetscii("HELLO 123 @!£"), equalTo(
                shortArrayOf(72, 69, 76, 76, 79, 32, 49, 50, 51, 32, 64, 33, 0x5c)))
        assertThat(Petscii.encodePetscii("\uf11a"), equalTo(shortArrayOf(0x12)))   // reverse vid
        assertThat(Petscii.encodePetscii("♥"), equalTo(shortArrayOf(0xd3)))
        assertThat(Petscii.encodePetscii("π"), equalTo(shortArrayOf(0xff)))
        assertFailsWith<CompilerException> { Petscii.encodePetscii("✓") }

        assertThat(Petscii.decodePetscii(listOf(72, 0x5c, 0xd3, 0xff)), equalTo("H£♥π"))
        assertFailsWith<ArrayIndexOutOfBoundsException> { Petscii.decodePetscii(listOf(-1)) }
        assertFailsWith<ArrayIndexOutOfBoundsException> { Petscii.decodePetscii(listOf(256)) }
    }

    @Test
    fun testScreencodeLowercase() {
        assertThat(Petscii.encodeScreencode("hello WORLD 123 @!£", true), equalTo(
                shortArrayOf(0x08, 0x05, 0x0c, 0x0c, 0x0f, 0x20, 0x57, 0x4f, 0x52, 0x4c, 0x44, 0x20, 0x31, 0x32, 0x33, 0x20, 0x00, 0x21, 0x1c)
        ))
        assertThat(Petscii.encodeScreencode("✓", true), equalTo(shortArrayOf(0x7a)))
        assertFailsWith<CompilerException> { Petscii.encodeScreencode("♥", true) }
        assertFailsWith<CompilerException> { Petscii.encodeScreencode("π", true) }

        assertThat(Petscii.decodeScreencode(listOf(0x08, 0x57, 0x1c, 0x7a), true), equalTo("hW£✓"))
        assertFailsWith<ArrayIndexOutOfBoundsException> { Petscii.decodeScreencode(listOf(-1), true) }
        assertFailsWith<ArrayIndexOutOfBoundsException> { Petscii.decodeScreencode(listOf(256), true) }
    }

    @Test
    fun testScreencodeUppercase() {
        assertThat(Petscii.encodeScreencode("WORLD 123 @!£"), equalTo(
                shortArrayOf(0x17, 0x0f, 0x12, 0x0c, 0x04, 0x20, 0x31, 0x32, 0x33, 0x20, 0x00, 0x21, 0x1c)))
        assertThat(Petscii.encodeScreencode("♥"), equalTo(shortArrayOf(0x53)))
        assertThat(Petscii.encodeScreencode("π"), equalTo(shortArrayOf(0x5e)))
        assertFailsWith<CompilerException> { Petscii.encodeScreencode("✓") }
        assertFailsWith<CompilerException> { Petscii.encodeScreencode("hello") }

        assertThat(Petscii.decodeScreencode(listOf(0x17, 0x1c, 0x53, 0x5e)), equalTo("W£♥π"))
        assertFailsWith<ArrayIndexOutOfBoundsException> { Petscii.decodeScreencode(listOf(-1)) }
        assertFailsWith<ArrayIndexOutOfBoundsException> { Petscii.decodeScreencode(listOf(256)) }
    }
}