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package moe.nea.firmament.features.texturepack
import com.google.gson.JsonArray
import com.google.gson.JsonElement
import com.google.gson.JsonObject
import com.google.gson.JsonPrimitive
import net.minecraft.item.ItemStack
import net.minecraft.nbt.NbtByte
import net.minecraft.nbt.NbtCompound
import net.minecraft.nbt.NbtDouble
import net.minecraft.nbt.NbtElement
import net.minecraft.nbt.NbtFloat
import net.minecraft.nbt.NbtInt
import net.minecraft.nbt.NbtList
import net.minecraft.nbt.NbtLong
import net.minecraft.nbt.NbtShort
import net.minecraft.nbt.NbtString
import moe.nea.firmament.util.extraAttributes
fun interface NbtMatcher {
fun matches(nbt: NbtElement): Boolean
object Parser {
fun parse(jsonElement: JsonElement): NbtMatcher? {
if (jsonElement is JsonPrimitive) {
if (jsonElement.isString) {
val string = jsonElement.asString
return MatchStringExact(string)
}
if (jsonElement.isNumber) {
return MatchNumberExact(jsonElement.asLong) //TODO: parse generic number
}
}
if (jsonElement is JsonObject) {
var encounteredParser: NbtMatcher? = null
for (entry in ExclusiveParserType.entries) {
val data = jsonElement[entry.key] ?: continue
if (encounteredParser != null) {
// TODO: warn
return null
}
encounteredParser = entry.parse(data) ?: return null
}
return encounteredParser
}
return null
}
enum class ExclusiveParserType(val key: String) {
STRING("string") {
override fun parse(element: JsonElement): NbtMatcher? {
return MatchString(StringMatcher.parse(element))
}
},
INT("int") {
override fun parse(element: JsonElement): NbtMatcher? {
return parseGenericNumber(element,
{ it.asInt },
{ (it as? NbtInt)?.intValue() },
{ a, b ->
if (a == b) Comparison.EQUAL
else if (a < b) Comparison.LESS_THAN
else Comparison.GREATER
})
}
},
FLOAT("float") {
override fun parse(element: JsonElement): NbtMatcher? {
return parseGenericNumber(element,
{ it.asFloat },
{ (it as? NbtFloat)?.floatValue() },
{ a, b ->
if (a == b) Comparison.EQUAL
else if (a < b) Comparison.LESS_THAN
else Comparison.GREATER
})
}
},
DOUBLE("double") {
override fun parse(element: JsonElement): NbtMatcher? {
return parseGenericNumber(element,
{ it.asDouble },
{ (it as? NbtDouble)?.doubleValue() },
{ a, b ->
if (a == b) Comparison.EQUAL
else if (a < b) Comparison.LESS_THAN
else Comparison.GREATER
})
}
},
LONG("long") {
override fun parse(element: JsonElement): NbtMatcher? {
return parseGenericNumber(element,
{ it.asLong },
{ (it as? NbtLong)?.longValue() },
{ a, b ->
if (a == b) Comparison.EQUAL
else if (a < b) Comparison.LESS_THAN
else Comparison.GREATER
})
}
},
SHORT("short") {
override fun parse(element: JsonElement): NbtMatcher? {
return parseGenericNumber(element,
{ it.asShort },
{ (it as? NbtShort)?.shortValue() },
{ a, b ->
if (a == b) Comparison.EQUAL
else if (a < b) Comparison.LESS_THAN
else Comparison.GREATER
})
}
},
BYTE("byte") {
override fun parse(element: JsonElement): NbtMatcher? {
return parseGenericNumber(element,
{ it.asByte },
{ (it as? NbtByte)?.byteValue() },
{ a, b ->
if (a == b) Comparison.EQUAL
else if (a < b) Comparison.LESS_THAN
else Comparison.GREATER
})
}
},
;
abstract fun parse(element: JsonElement): NbtMatcher?
}
enum class Comparison {
LESS_THAN, EQUAL, GREATER
}
inline fun <T : Any> parseGenericNumber(
jsonElement: JsonElement,
primitiveExtractor: (JsonPrimitive) -> T?,
crossinline nbtExtractor: (NbtElement) -> T?,
crossinline compare: (T, T) -> Comparison
): NbtMatcher? {
if (jsonElement is JsonPrimitive) {
val expected = primitiveExtractor(jsonElement) ?: return null
return NbtMatcher {
val actual = nbtExtractor(it) ?: return@NbtMatcher false
compare(actual, expected) == Comparison.EQUAL
}
}
if (jsonElement is JsonObject) {
val minElement = jsonElement.getAsJsonPrimitive("min")
val min = if (minElement != null) primitiveExtractor(minElement) ?: return null else null
val minExclusive = jsonElement.get("minExclusive")?.asBoolean ?: false
val maxElement = jsonElement.getAsJsonPrimitive("max")
val max = if (maxElement != null) primitiveExtractor(maxElement) ?: return null else null
val maxExclusive = jsonElement.get("maxExclusive")?.asBoolean ?: true
if (min == null && max == null) return null
return NbtMatcher {
val actual = nbtExtractor(it) ?: return@NbtMatcher false
if (max != null) {
val comp = compare(actual, max)
if (comp == Comparison.GREATER) return@NbtMatcher false
if (comp == Comparison.EQUAL && maxExclusive) return@NbtMatcher false
}
if (min != null) {
val comp = compare(actual, min)
if (comp == Comparison.LESS_THAN) return@NbtMatcher false
if (comp == Comparison.EQUAL && minExclusive) return@NbtMatcher false
}
return@NbtMatcher true
}
}
return null
}
}
class MatchNumberExact(val number: Long) : NbtMatcher {
override fun matches(nbt: NbtElement): Boolean {
return when (nbt) {
is NbtByte -> nbt.byteValue().toLong() == number
is NbtInt -> nbt.intValue().toLong() == number
is NbtShort -> nbt.shortValue().toLong() == number
is NbtLong -> nbt.longValue().toLong() == number
else -> false
}
}
}
class MatchStringExact(val string: String) : NbtMatcher {
override fun matches(nbt: NbtElement): Boolean {
return nbt is NbtString && nbt.asString() == string
}
override fun toString(): String {
return "MatchNbtStringExactly($string)"
}
}
class MatchString(val string: StringMatcher) : NbtMatcher {
override fun matches(nbt: NbtElement): Boolean {
return nbt is NbtString && string.matches(nbt.asString())
}
override fun toString(): String {
return "MatchNbtString($string)"
}
}
}
data class ExtraAttributesPredicate(
val path: NbtPrism,
val matcher: NbtMatcher,
) : FirmamentModelPredicate {
object Parser : FirmamentModelPredicateParser {
override fun parse(jsonElement: JsonElement): FirmamentModelPredicate? {
if (jsonElement !is JsonObject) return null
val path = jsonElement.get("path") ?: return null
val pathSegments = if (path is JsonArray) {
path.map { (it as JsonPrimitive).asString }
} else if (path is JsonPrimitive && path.isString) {
path.asString.split(".")
} else return null
val matcher = NbtMatcher.Parser.parse(jsonElement.get("match") ?: jsonElement)
?: return null
return ExtraAttributesPredicate(NbtPrism(pathSegments), matcher)
}
}
override fun test(stack: ItemStack): Boolean {
return path.access(stack.extraAttributes)
.any { matcher.matches(it) }
}
}
class NbtPrism(val path: List<String>) {
override fun toString(): String {
return "Prism($path)"
}
fun access(root: NbtElement): Collection<NbtElement> {
var rootSet = mutableListOf(root)
var switch = mutableListOf<NbtElement>()
for (pathSegment in path) {
if (pathSegment == ".") continue
for (element in rootSet) {
if (element is NbtList) {
if (pathSegment == "*")
switch.addAll(element)
val index = pathSegment.toIntOrNull() ?: continue
if (index !in element.indices) continue
switch.add(element[index])
}
if (element is NbtCompound) {
if (pathSegment == "*")
element.keys.mapTo(switch) { element.get(it)!! }
switch.add(element.get(pathSegment) ?: continue)
}
}
val temp = switch
switch = rootSet
rootSet = temp
switch.clear()
}
return rootSet
}
}
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