/*
 * Copyright (C) 2019 Intel Corporation.  All rights reserved.
 * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 */

import * as vscode from 'vscode';
import * as os from 'os';

/* see https://github.com/llvm/llvm-project/tree/main/lldb/tools/lldb-vscode#attaching-settings */
export interface WasmDebugConfig {
    type: string,
    name: string,
    request: string,
    program? : string,
    pid?: string,
    stopOnEntry?: boolean,
    waitFor?: boolean,
    initCommands?: string[],
    preRunCommands?: string[],
    stopCommands?: string[], 
    exitCommands?: string[],
    terminateCommands?: string[],
    attachCommands?: string[]
}

export class WasmDebugConfigurationProvider
    implements vscode.DebugConfigurationProvider {
    private wasmDebugConfig: WasmDebugConfig = {
        type: 'wamr-debug',
        name: 'Attach',
        request: 'attach',
        stopOnEntry: true,
        attachCommands: [
            /* default port 1234 */
            'process connect -p wasm connect://127.0.0.1:1234',
        ]
    };

    constructor(extensionPath: string) {
        this.wasmDebugConfig.initCommands = [
            /* Add rust formatters -> https://lldb.llvm.org/use/variable.html */
            `command script import ${extensionPath}/formatters/rust.py`
        ];

        if (os.platform() === 'win32' || os.platform() === 'darwin') {
            this.wasmDebugConfig.initCommands.push('platform select remote-linux');
        }
    }

    public resolveDebugConfiguration(
        _: vscode.WorkspaceFolder | undefined,
        debugConfiguration: vscode.DebugConfiguration,
    ): vscode.ProviderResult<vscode.DebugConfiguration> {

        this.wasmDebugConfig = {
            ...this.wasmDebugConfig,
            ...debugConfiguration
        };

        return this.wasmDebugConfig;
    }

    public getDebugConfig(): vscode.DebugConfiguration {
        return this.wasmDebugConfig;
    }
}