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package org.ssssssss.script.parsing.ast.statement;

import org.ssssssss.script.compile.MagicScriptCompiler;
import org.ssssssss.script.parsing.Span;
import org.ssssssss.script.parsing.VarIndex;
import org.ssssssss.script.parsing.ast.Expression;
import org.ssssssss.script.parsing.ast.Node;

import java.util.ArrayList;
import java.util.List;

public class VariableDestructuringDefine extends VariableDefine {

	private final List defines;
	private final Expression right;
	private final boolean mapAccess;

	public VariableDestructuringDefine(Span span, int size, Expression right, boolean mapAccess) {
		super(span, null, null);
		this.defines = new ArrayList<>(size);
		this.right = right;
		this.mapAccess = mapAccess;
	}

	public void add(VariableDefine variableDefine) {
		defines.add(variableDefine);
	}

	@Override
	public void visitMethod(MagicScriptCompiler compiler) {
		if (right != null) {
			right.visitMethod(compiler);
		}
	}

	@Override
	public void compile(MagicScriptCompiler compiler) {
		compiler.visit(this.right).store(4);
		for(int i =0, size = this.defines.size(); i < size ; i++){
			VariableDefine define = this.defines.get(i);
			compiler.pre_store(define.getVarIndex());
			if(this.mapAccess){
				compiler.newRuntimeContext()
					.load4()
					.ldc(define.getVarIndex().getName())    // 成员名
					.insn(ICONST_1)    // 是否可空调用 ?.
					.asBoolean()
					.insn(ICONST_0)    // 非linq中
					.asBoolean()
					.call("member_access", 5);
			} else {
				compiler.load4().visitInt(i).asInteger().operator("map_or_array_access");
			}
			compiler.scopeStore();
		}
	}
}