package dev.openrs2.asm.io

import dev.openrs2.asm.classpath.JsrInliner
import dev.openrs2.asm.classpath.Library
import dev.openrs2.util.io.entries
import org.objectweb.asm.ClassReader
import org.objectweb.asm.tree.ClassNode
import java.util.jar.JarInputStream

class JarLibraryReader(private val input: JarInputStream) : LibraryReader {
    override fun read(): Library {
        val library = Library()

        for (entry in input.entries) {
            if (!entry.name.endsWith(CLASS_SUFFIX)) {
                continue
            }

            val clazz = ClassNode()
            val reader = ClassReader(input)
            reader.accept(JsrInliner(clazz), ClassReader.SKIP_DEBUG or ClassReader.SKIP_FRAMES)

            library.add(clazz)
        }

        return library
    }

    private companion object {
        private const val CLASS_SUFFIX = ".class"
    }
}