// Copyright (c) 2022, Compiler Explorer Authors
// All rights reserved.
//
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// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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import path from 'path';

import type {CompilationResult, ExecutionOptions} from '../../types/compilation/compilation.interfaces.js';
import type {PreliminaryCompilerInfo} from '../../types/compiler.interfaces.js';
import type {ExecutableExecutionOptions} from '../../types/execution/execution.interfaces.js';
import type {ParseFiltersAndOutputOptions} from '../../types/features/filters.interfaces.js';
import {BaseCompiler} from '../base-compiler.js';
import {CompilationEnvironment} from '../compilation-env.js';

export class HookCompiler extends BaseCompiler {
    private readonly hook_home: string;

    constructor(compilerInfo: PreliminaryCompilerInfo & Record<string, any>, env: CompilationEnvironment) {
        super(compilerInfo, env);
        this.hook_home = path.resolve(path.join(path.dirname(this.compiler.exe), '..'));
    }

    static get key(): string {
        return 'hook';
    }

    override optionsForFilter(filters: ParseFiltersAndOutputOptions): string[] {
        return ['--dump'];
    }

    override getOutputFilename(dirPath: string): string {
        return path.join(dirPath, 'example.out');
    }

    addHookHome(env: any) {
        return {HOOK_HOME: this.hook_home, ...env};
    }

    override async handleInterpreting(key, executeParameters: ExecutableExecutionOptions): Promise<CompilationResult> {
        executeParameters.env = this.addHookHome(executeParameters.env);
        return super.handleInterpreting(key, executeParameters);
    }

    override async runCompiler(
        compiler: string,
        options: string[],
        inputFilename: string,
        execOptions: ExecutionOptions & {env: Record<string, string>},
    ): Promise<CompilationResult> {
        const dirPath = path.dirname(inputFilename);
        const outputFilename = this.getOutputFilename(dirPath);
        options.push(outputFilename);
        return super.runCompiler(compiler, options, inputFilename, execOptions);
    }

    override async processAsm(result, filters, options) {
        // Ignoring `trim` filter because it is not supported by Hook.
        filters.trim = false;
        const _result = await super.processAsm(result, filters, options);
        const commentRegex = /^\s*;(.*)/;
        const instructionRegex = /^\s{2}(\d+)(.*)/;
        const asm = _result.asm;
        let lastLineNo: number | undefined;
        for (const item of asm) {
            const text = item.text;
            if (commentRegex.test(text)) {
                item.source = {line: undefined, file: null};
                lastLineNo = undefined;
                continue;
            }
            const match = text.match(instructionRegex);
            if (match) {
                const lineNo = parseInt(match[1]);
                item.source = {line: lineNo, file: null};
                lastLineNo = lineNo;
                continue;
            }
            if (text) {
                item.source = {line: lastLineNo, file: null};
                continue;
            }
            item.source = {line: undefined, file: null};
            lastLineNo = undefined;
        }
        _result.asm = asm;
        return _result;
    }
}