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package org.jruby.compiler;

import org.jruby.Ruby;
import org.jruby.internal.runtime.AbstractIRMethod;
import org.jruby.ir.interpreter.InterpreterContext;
import org.jruby.ir.targets.JVMVisitor;
import org.jruby.ir.targets.JVMVisitorMethodContext;
import org.jruby.util.cli.Options;

public class MethodJITClassGenerator extends JITClassGenerator {
    public MethodJITClassGenerator(String className, String methodName, String key, Ruby ruby, AbstractIRMethod method, JVMVisitor visitor) {
        super(className, methodName, key, ruby, visitor);
        this.method = method;
    }

    @SuppressWarnings("unchecked")
    protected void compile(JVMVisitorMethodContext context) {
        if (bytecode != null) return;

        // Time the compilation
        long start = System.nanoTime();

        InterpreterContext ic = method.ensureInstrsReady();

        int insnCount = ic.getInstructions().length;
        if (insnCount > Options.JIT_MAXSIZE.load()) {
            // methods with more than our limit of basic blocks are likely too large to JIT, so bail out
            throw new NotCompilableException("Could not compile " + method + "; instruction count " + insnCount + " exceeds threshold of " + Options.JIT_MAXSIZE.load());
        }

        // This may not be ok since we'll end up running passes specific to JIT
        // CON FIXME: Really should clone scope before passes in any case
        bytecode = visitor.compileToBytecode(method.getIRScope(), context);

//            try {
//                java.io.FileOutputStream fos = new java.io.FileOutputStream(className + '#' + methodName + ".class");
//                fos.write(bytecode);
//                fos.close();
//            } catch (Exception e) {
//                e.printStackTrace();
//            }

        compileTime = System.nanoTime() - start;
    }

    // FIXME: Does anything call this?  If so we should document it.
    public void generate() {
        compile(new JVMVisitorMethodContext());
    }

    @Override
    public String toString() {
        return methodName + "() at " + method.getFile() + ':' + method.getLine();
    }
    private final AbstractIRMethod method;
}