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import {beforeAll, describe, expect, it} from 'vitest';

import {LLVMIRDemangler} from '../lib/demangler/llvm.js';
import {LlvmIrParser} from '../lib/llvm-ir.js';
import * as properties from '../lib/properties.js';

const languages = {
    'c++': {id: 'c++'},
};

describe('llvm-ir parseMetaNode', () => {
    let llvmIrParser;
    let compilerProps;

    beforeAll(() => {
        const fakeProps = new properties.CompilerProps(languages, properties.fakeProps({}));
        compilerProps = (fakeProps.get as any).bind(fakeProps, 'c++');

        llvmIrParser = new LlvmIrParser(compilerProps, undefined as unknown as LLVMIRDemangler);
    });

    it('should parse DILocation node', () => {
        expect(llvmIrParser.parseMetaNode('!60 = !DILocation(line: 9, column: 15, scope: !58)')).toEqual({
            metaType: 'Location',
            metaId: '!60',
            line: '9',
            column: '15',
            scope: '!58',
        });
    });

    it('should parse distinct DILexicalBlock', () => {
        expect(
            llvmIrParser.parseMetaNode('!50 = distinct !DILexicalBlock(scope: !44, file: !1, line: 8, column: 5)'),
        ).toEqual({
            metaType: 'LexicalBlock',
            metaId: '!50',
            scope: '!44',
            file: '!1',
            line: '8',
            column: '5',
        });
    });

    it('should parse all value types', () => {
        expect(
            llvmIrParser.parseMetaNode(
                '!44 = distinct !DISubprogram(name: "func<int, int>", ' +
                    'scope: !1, line: 7, isLocal: false, isDefinition: true, flags: ' +
                    'DIFlagPrototyped, ceEmpty: "", ceTest: "a:b\\"c,d")',
            ),
        ).toEqual({
            metaType: 'Subprogram',
            metaId: '!44',
            name: 'func<int, int>',
            line: '7',
            scope: '!1',
            isLocal: 'false',
            isDefinition: 'true',
            flags: 'DIFlagPrototyped',
            ceTest: 'a:b\\"c,d',
            ceEmpty: '',
        });
    });

    it('should parse distinct DILexicalBlock', () => {
        expect(
            llvmIrParser.parseMetaNode(
                '!1 = !DIFile(filename: "/tmp/example.cpp", directory: "/home/compiler-explorer")',
            ),
        ).toEqual({
            metaType: 'File',
            metaId: '!1',
            filename: '/tmp/example.cpp',
            directory: '/home/compiler-explorer',
        });
    });
});

describe('llvm-ir getSourceLineNumber', () => {
    let llvmIrParser;
    let compilerProps;

    beforeAll(() => {
        const fakeProps = new properties.CompilerProps(languages, properties.fakeProps({}));
        compilerProps = (fakeProps.get as any).bind(fakeProps, 'c++');

        llvmIrParser = new LlvmIrParser(compilerProps, undefined as unknown as LLVMIRDemangler);
    });

    const debugInfo = {
        '!10': {line: 10},
        '!20': {line: 20, scope: '!10'},
        '!11': {scope: '!10'},
        '!12': {line: 0, scope: '!10'},
        '!14': {},
        '!15': {scope: '!14'},
        '!16': {scope: '!42'},
    };

    it('should return a line number', () => {
        expect(llvmIrParser.getSourceLineNumber(debugInfo, '!10')).toBe(10);
        expect(llvmIrParser.getSourceLineNumber(debugInfo, '!20')).toBe(20);
    });

    it('should return the line number of its parent scope', () => {
        expect(llvmIrParser.getSourceLineNumber(debugInfo, '!11')).toBe(10);
        expect(llvmIrParser.getSourceLineNumber(debugInfo, '!12')).toBe(10);
    });

    it('should return null on non-existend node', () => {
        expect(llvmIrParser.getSourceLineNumber(debugInfo, '!16')).toBe(null);
    });

    it('should return null if no higher scope has a line', () => {
        expect(llvmIrParser.getSourceLineNumber(debugInfo, '!14')).toBe(null);
        expect(llvmIrParser.getSourceLineNumber(debugInfo, '!15')).toBe(null);
    });
});

describe('llvm-ir getSourceColumn', () => {
    let llvmIrParser;
    let compilerProps;

    beforeAll(() => {
        const fakeProps = new properties.CompilerProps(languages, properties.fakeProps({}));
        compilerProps = (fakeProps.get as any).bind(fakeProps, 'c++');

        llvmIrParser = new LlvmIrParser(compilerProps, undefined as unknown as LLVMIRDemangler);
    });

    const debugInfo = {
        '!10': {column: 10},
        '!20': {column: 20, scope: '!10'},
        '!11': {scope: '!10'},
        '!12': {column: 0, scope: '!10'},
        '!14': {},
        '!15': {scope: '!14'},
        '!16': {scope: '!42'},
    };

    it('should return a column number', () => {
        expect(llvmIrParser.getSourceColumn(debugInfo, '!10')).toBe(10);
        expect(llvmIrParser.getSourceColumn(debugInfo, '!20')).toBe(20);
    });

    it('should return the column number of its parent scope', () => {
        expect(llvmIrParser.getSourceColumn(debugInfo, '!11')).toBe(10);
        expect(llvmIrParser.getSourceColumn(debugInfo, '!12')).toBe(10);
    });

    it('should return undefined on non-existend node', () => {
        expect(llvmIrParser.getSourceColumn(debugInfo, '!16')).toBe(undefined);
        expect(llvmIrParser.getSourceColumn(debugInfo, '!30')).toBe(undefined);
    });

    it('should return undefined if no higher scope has a column', () => {
        expect(llvmIrParser.getSourceColumn(debugInfo, '!14')).toBe(undefined);
        expect(llvmIrParser.getSourceColumn(debugInfo, '!15')).toBe(undefined);
    });
});

describe('llvm-ir getFileName', () => {
    let llvmIrParser;
    let compilerProps;

    beforeAll(() => {
        const fakeProps = new properties.CompilerProps(languages, properties.fakeProps({}));
        compilerProps = (fakeProps.get as any).bind(fakeProps, 'c++');

        llvmIrParser = new LlvmIrParser(compilerProps, undefined as unknown as LLVMIRDemangler);
    });
    const debugInfo = {
        '!10': {filename: '/test.cpp'},
        '!20': {filename: '/example.cpp'},
        '!11': {file: '!10'},
        '!21': {file: '!20'},
        '!12': {scope: '!11'},
        '!13': {scope: '!12'},
    };

    it('should return a filename', () => {
        expect(llvmIrParser.getFileName(debugInfo, '!10')).toBe('/test.cpp');
        expect(llvmIrParser.getFileName(debugInfo, '!11')).toBe('/test.cpp');
    });

    it('should return the filename of its parent scope', () => {
        expect(llvmIrParser.getFileName(debugInfo, '!12')).toBe('/test.cpp');
        expect(llvmIrParser.getFileName(debugInfo, '!13')).toBe('/test.cpp');
    });

    it('should return null on non-existend node', () => {
        expect(llvmIrParser.getFileName(debugInfo, '!42')).toBe(null);
    });

    it('should not return source filename', () => {
        expect(llvmIrParser.getFileName(debugInfo, '!20')).toBe(null);
        expect(llvmIrParser.getFileName(debugInfo, '!21')).toBe(null);
    });
});