// The module 'vscode' contains the VS Code extensibility API
// Import the module and reference it with the alias vscode in your code below
const vscode = require('vscode');

// this method is called when your extension is activated
// your extension is activated the very first time the command is executed
function activate(context) {

    // Use the console to output diagnostic information (console.log) and errors (console.error)
    // This line of code will only be executed once when your extension is activated
    console.log('Congratulations, your extension "negative-spacing" is now active!');

    // The command has been defined in the package.json file
    // Now provide the implementation of the command with  registerCommand
    // The commandId parameter must match the command field in package.json
    let disposable = vscode.commands.registerCommand('extension.sayHello', function () {
        // The code you place here will be executed every time your command is executed

        // Display a message box to the user
        vscode.window.showInformationMessage('Hello World!');
    });

    context.subscriptions.push(disposable);
}
exports.activate = activate;

// this method is called when your extension is deactivated
function deactivate() {
}
exports.deactivate = deactivate;


function negativeIndent(text) {
    let encounteredIndent = false;
    let indentString = '';
    let lines = [];
    let indents = [];
    
    for (let line of text.split('\n')) {
        if (!encounteredIndent) {
            let whitespace = /^\s*/.exec(line)[0];
            
            if (whitespace.length > 0) {
                encounteredIndent = true;
                indentString = whitespace;
            } else {
                lines.push(line);
                indents.push(0);
            
                continue;
            }
        }
        
        let indentLevel = 0;
        
        while (line.substring(0, indentString.length) === indentString) {
            indentLevel++;
            line = line.substring(indentString.length);
        }
        
        lines.push(line);
        indents.push(indentLevel);
    }
    
    if (!encounteredIndent) {
        return text;
    }
    
    console.log(lines, indents);
    
    let maxIndent = Math.max(...indents);
    
    let newText = '';
    
    for (let i = 0; i < lines.length; i++) {
        let line = lines[i];
        let indentLevel = indents[i];
        
        newText += indentString.repeat(maxIndent - indentLevel) + line + '\n';
    }
    
    return newText;
}