//@ts-check
const { isAlpha } = require('./utils')


class Lexer{
	/**
	 * @param { string } source
	 */
	constructor(source){
		/** @type { string[] } */
		this.tokens = [];
		this.current = 0;
		this.start = 0;
		this.source = source
	}

	scanTokens(){
		while(this.current < this.source.length){
			this.start = this.current
			this.scanToken()

		}
		return this.tokens;
	}

	scanToken(){

		if(this.source[this.current] == "\""){
			this.string()
		}
		else{
			let content = ""
			while(this.source[this.current] != ' ' && this.source[this.current] != '\n' && this.current < this.source.length ){
				content += this.source[this.current];
				this.current++;

			}
			this.tokens.push(content)
		}
		this.current++;

	}

	string(){
		this.current++;
		let content = ""
		while(this.source[this.current] != "\"" && this.current < this.source.length){
			content += this.source[this.current];
			this.current++;
		}
		this.tokens.push(content)
	}

	//addToken(tokenType, value=""){
	//	this.tokens.push(Token(tokenType, value))
	//}
}


module.exports = {
	Lexer
}