/*
 * Copyright (c) 2021 Huawei Device Co., Ltd.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import {
    expect
} from 'chai';
import 'mocha';
import {
    Dec,
    Inc,
    Istrue,
    Neg,
    Not,
    Returnundefined,
    Sttoglobalrecord,
    Tonumber,
    Tryldglobalbyname,
    Trystglobalbyname,
    Imm,
    Jeqz,
    Jmp,
    Label,
    Lda,
    Ldai,
    Sta,
    VReg,
    IRNode
} from "../../src/irnodes";
import { checkInstructions, compileMainSnippet } from "../utils/base";
import { creatAstFromSnippet } from "../utils/asthelper";
import { PandaGen } from '../../src/pandagen';

describe("PrefixOperationsTest", function () {
    it('let i = 5; ++i', function () {
        let insns = compileMainSnippet("let i = 5; let j = ++i");
        IRNode.pg = new PandaGen("foo", creatAstFromSnippet("let i = 5; let j = ++i"), 0, undefined);

        let temp = new VReg();

        let expected = [
            new Ldai(new Imm(5)),
            new Sttoglobalrecord(new Imm(0), 'i'),
            new Tryldglobalbyname(new Imm(1), 'i'),
            new Sta(temp),
            new Lda(temp),
            new Inc(new Imm(2)),
            new Trystglobalbyname(new Imm(3), 'i'),
            new Sttoglobalrecord(new Imm(4), 'j'),
            new Returnundefined()
        ];

        expect(checkInstructions(insns, expected)).to.be.true;
    });

    it('let i = 5; --i', function () {
        let insns = compileMainSnippet("let i = 5; let j = --i");
        IRNode.pg = new PandaGen("foo", creatAstFromSnippet("let i = 5; let j = --i"), 0, undefined);

        let temp = new VReg();

        let expected = [
            new Ldai(new Imm(5)),
            new Sttoglobalrecord(new Imm(0), 'i'),
            new Tryldglobalbyname(new Imm(1), 'i'),
            new Sta(temp),
            new Lda(temp),
            new Dec(new Imm(2)),
            new Trystglobalbyname(new Imm(3), 'i'),
            new Sttoglobalrecord(new Imm(4), 'j'),
            new Returnundefined()
        ];

        expect(checkInstructions(insns, expected)).to.be.true;
    });

    it('let i = 5; let j = +i', function () {
        let insns = compileMainSnippet("let i = 5; let j = +i");
        IRNode.pg = new PandaGen("foo", creatAstFromSnippet("let i = 5; let j = +i"), 0, undefined);

        let temp = new VReg();

        let expected = [
            new Ldai(new Imm(5)),
            new Sttoglobalrecord(new Imm(0), 'i'),
            new Tryldglobalbyname(new Imm(1), 'i'),
            new Sta(temp),
            new Lda(temp),
            new Tonumber(new Imm(2)),
            new Sttoglobalrecord(new Imm(3), 'j'),
            new Returnundefined()
        ];

        expect(checkInstructions(insns, expected)).to.be.true;
    });

    it('let i = 5; let j = -i', function () {
        let insns = compileMainSnippet("let i = 5; let j = -i");
        IRNode.pg = new PandaGen("foo", creatAstFromSnippet("let i = 5; let j = -i"), 0, undefined);

        let temp = new VReg();

        let expected = [
            new Ldai(new Imm(5)),
            new Sttoglobalrecord(new Imm(0), 'i'),
            new Tryldglobalbyname(new Imm(1), 'i'),
            new Sta(temp),
            new Lda(temp),
            new Neg(new Imm(2)),
            new Sttoglobalrecord(new Imm(3), 'j'),
            new Returnundefined()
        ];

        expect(checkInstructions(insns, expected)).to.be.true;
    });

    it('let i = 5; let j = !i', function () {
        let insns = compileMainSnippet("let i = 5; let j = !i");
        IRNode.pg = new PandaGen("foo", creatAstFromSnippet("let i = 5; let j = !i"), 0, undefined);

        let preLabel = new Label();
        let postLabel = new Label();
        let expected = [
            new Ldai(new Imm(5)),
            new Sttoglobalrecord(new Imm(0), 'i'),
            new Tryldglobalbyname(new Imm(1), 'i'),
            new Sta(new VReg()),
            new Istrue(),
            new Jeqz(preLabel),
            new Lda(new VReg()),
            new Jmp(postLabel),
            preLabel,
            new Lda(new VReg()),
            postLabel,
            new Sttoglobalrecord(new Imm(2), 'j'),
            new Returnundefined()
        ];
        expect(checkInstructions(insns, expected)).to.be.true;
    });

    it('let i = 5; let j = ~i', function () {
        let insns = compileMainSnippet("let i = 5; let j = ~i");
        IRNode.pg = new PandaGen("foo", creatAstFromSnippet("let i = 5; let j = ~i"), 0, undefined);

        let tempI = new VReg();

        let expected = [
            new Ldai(new Imm(5)),
            new Sttoglobalrecord(new Imm(0), 'i'),
            new Tryldglobalbyname(new Imm(1), 'i'),
            new Sta(tempI),
            new Lda(tempI),
            new Not(new Imm(2)),
            new Sttoglobalrecord(new Imm(3), 'j'),
            new Returnundefined()
        ];

        expect(checkInstructions(insns, expected)).to.be.true;
    });
});