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package org.jf.dexlib2;

import org.stringtemplate.v4.*;

import java.io.*;
import java.net.URL;

public class AccessorTestGenerator {
    private static class UnaryOperation {
        public final String name;
        public UnaryOperation(String name) {
            this.name = name;
        }
    }

    private static class BinaryOperation {
        public final String name;
        public final String[] inputTypes;
        public BinaryOperation(String name, String[] inputTypes) {
            this.name = name;
            this.inputTypes = inputTypes;
        }
    }

    private static class TypeDef {
        public final String name;
        public final UnaryOperation[] unaryOperations;
        public final BinaryOperation[] binaryOperations;
        public TypeDef(String name, UnaryOperation[] unaryOperations, BinaryOperation[] binaryOperations) {
            this.name = name;
            this.unaryOperations = unaryOperations;
            this.binaryOperations = binaryOperations;
        }
    }

    private static final UnaryOperation[] unaryOperations = new UnaryOperation[] {
            new UnaryOperation("preinc"),
            new UnaryOperation("postinc"),
            new UnaryOperation("predec"),
            new UnaryOperation("postdec")
    };

    private static final String[] booleanInputs = new String[] {"boolean"};
    private static final String[] integralInputs = new String[] {"int", "long"};
    private static final String[] allInputs = new String[] {"int", "float", "long", "double"};

    private static final BinaryOperation[] booleanOperations = new BinaryOperation[] {
            new BinaryOperation("and", booleanInputs),
            new BinaryOperation("or", booleanInputs),
            new BinaryOperation("xor", booleanInputs),
    };

    private static final BinaryOperation[] floatOperations = new BinaryOperation[] {
            new BinaryOperation("add", allInputs),
            new BinaryOperation("sub", allInputs),
            new BinaryOperation("mul", allInputs),
            new BinaryOperation("div", allInputs),
            new BinaryOperation("rem", allInputs),
    };

    private static final BinaryOperation[] integralOperations = new BinaryOperation[] {
            new BinaryOperation("add", allInputs),
            new BinaryOperation("sub", allInputs),
            new BinaryOperation("mul", allInputs),
            new BinaryOperation("div", allInputs),
            new BinaryOperation("rem", allInputs),
            new BinaryOperation("and", integralInputs),
            new BinaryOperation("or", integralInputs),
            new BinaryOperation("xor", integralInputs),
            new BinaryOperation("shl", integralInputs),
            new BinaryOperation("shr", integralInputs),
            new BinaryOperation("ushr", integralInputs),
    };

    private static final TypeDef[] types = new TypeDef[] {
            new TypeDef("boolean", new UnaryOperation[0], booleanOperations),
            new TypeDef("byte", unaryOperations, integralOperations),
            new TypeDef("char", unaryOperations, integralOperations),
            new TypeDef("short", unaryOperations, integralOperations),
            new TypeDef("int", unaryOperations, integralOperations),
            new TypeDef("long", unaryOperations, integralOperations),
            new TypeDef("float", unaryOperations, floatOperations),
            new TypeDef("double", unaryOperations, floatOperations),
    };


    public static void main(String[] args) throws IOException {
        if (args.length != 1) {
            System.err.println("Usage: java org.jf.dexlib2.AccessorTestGenerator <output_file>");
        }

        URL stgUrl = AccessorTestGenerator.class.getClassLoader().getResource("AccessorTest.stg");
        STGroupFile stg = new STGroupFile(stgUrl, "utf-8", '<', '>');
        ST fileSt = stg.getInstanceOf("file");
        fileSt.add("types", types);

        PrintWriter w = null;
        try {
            w = new PrintWriter(new BufferedWriter(new FileWriter(args[0])));
            w.print(fileSt.render());
        } finally {
            if (w != null) {
                w.close();
            }
        }
    }
}