"use strict";
/**
 * AeThex Compiler - Lexer (Tokenizer)
 * Converts source code into tokens
 */
Object.defineProperty(exports, "__esModule", { value: true });
exports.Lexer = exports.TokenType = void 0;
var TokenType;
(function (TokenType) {
    // Keywords
    TokenType["REALITY"] = "REALITY";
    TokenType["JOURNEY"] = "JOURNEY";
    TokenType["LET"] = "LET";
    TokenType["IMPORT"] = "IMPORT";
    TokenType["FROM"] = "FROM";
    TokenType["WHEN"] = "WHEN";
    TokenType["OTHERWISE"] = "OTHERWISE";
    TokenType["RETURN"] = "RETURN";
    TokenType["PLATFORM"] = "PLATFORM";
    TokenType["NOTIFY"] = "NOTIFY";
    TokenType["REVEAL"] = "REVEAL";
    TokenType["SYNC"] = "SYNC";
    TokenType["ACROSS"] = "ACROSS";
    TokenType["NEW"] = "NEW";
    // Literals
    TokenType["IDENTIFIER"] = "IDENTIFIER";
    TokenType["STRING"] = "STRING";
    TokenType["NUMBER"] = "NUMBER";
    // Operators
    TokenType["PLUS"] = "PLUS";
    TokenType["MINUS"] = "MINUS";
    TokenType["STAR"] = "STAR";
    TokenType["SLASH"] = "SLASH";
    TokenType["EQUALS"] = "EQUALS";
    TokenType["EQUALS_EQUALS"] = "EQUALS_EQUALS";
    TokenType["NOT_EQUALS"] = "NOT_EQUALS";
    TokenType["BANG"] = "BANG";
    TokenType["LESS_THAN"] = "LESS_THAN";
    TokenType["GREATER_THAN"] = "GREATER_THAN";
    TokenType["LESS_EQUALS"] = "LESS_EQUALS";
    TokenType["GREATER_EQUALS"] = "GREATER_EQUALS";
    // Punctuation
    TokenType["LEFT_PAREN"] = "LEFT_PAREN";
    TokenType["RIGHT_PAREN"] = "RIGHT_PAREN";
    TokenType["LEFT_BRACE"] = "LEFT_BRACE";
    TokenType["RIGHT_BRACE"] = "RIGHT_BRACE";
    TokenType["LEFT_BRACKET"] = "LEFT_BRACKET";
    TokenType["RIGHT_BRACKET"] = "RIGHT_BRACKET";
    TokenType["COMMA"] = "COMMA";
    TokenType["DOT"] = "DOT";
    TokenType["COLON"] = "COLON";
    TokenType["SEMICOLON"] = "SEMICOLON";
    // Special
    TokenType["NEWLINE"] = "NEWLINE";
    TokenType["EOF"] = "EOF";
    TokenType["COMMENT"] = "COMMENT";
})(TokenType || (exports.TokenType = TokenType = {}));
class Lexer {
    constructor(source) {
        this.position = 0;
        this.line = 1;
        this.column = 1;
        this.current = '';
        this.keywords = new Map([
            ['reality', TokenType.REALITY],
            ['journey', TokenType.JOURNEY],
            ['let', TokenType.LET],
            ['import', TokenType.IMPORT],
            ['from', TokenType.FROM],
            ['when', TokenType.WHEN],
            ['otherwise', TokenType.OTHERWISE],
            ['return', TokenType.RETURN],
            ['platform', TokenType.PLATFORM],
            ['notify', TokenType.NOTIFY],
            ['reveal', TokenType.REVEAL],
            ['sync', TokenType.SYNC],
            ['across', TokenType.ACROSS],
            ['new', TokenType.NEW]
        ]);
        this.source = source;
        this.current = source[0] || '';
    }
    tokenize() {
        const tokens = [];
        while (!this.isAtEnd()) {
            const token = this.nextToken();
            if (token && token.type !== TokenType.COMMENT) {
                tokens.push(token);
            }
        }
        tokens.push(this.makeToken(TokenType.EOF, ''));
        return tokens;
    }
    nextToken() {
        this.skipWhitespace();
        if (this.isAtEnd()) {
            return null;
        }
        const char = this.current;
        // Comments
        if (char === '#') {
            return this.readComment();
        }
        // Strings
        if (char === '"' || char === "'") {
            return this.readString();
        }
        // Numbers
        if (this.isDigit(char)) {
            return this.readNumber();
        }
        // Identifiers and keywords
        if (this.isAlpha(char)) {
            return this.readIdentifier();
        }
        // Operators and punctuation
        return this.readOperator();
    }
    readComment() {
        const start = this.column;
        this.advance(); // skip #
        let value = '';
        while (!this.isAtEnd() && this.current !== '\n') {
            value += this.current;
            this.advance();
        }
        return this.makeToken(TokenType.COMMENT, value, start);
    }
    readString() {
        const quote = this.current;
        const start = this.column;
        this.advance(); // skip opening quote
        let value = '';
        while (!this.isAtEnd() && this.current !== quote) {
            if (this.current === '\\') {
                this.advance();
                // Handle escape sequences
                if (!this.isAtEnd()) {
                    value += this.current;
                    this.advance();
                }
            }
            else {
                value += this.current;
                this.advance();
            }
        }
        if (!this.isAtEnd()) {
            this.advance(); // skip closing quote
        }
        return this.makeToken(TokenType.STRING, value, start);
    }
    readNumber() {
        const start = this.column;
        let value = '';
        while (!this.isAtEnd() && (this.isDigit(this.current) || this.current === '.')) {
            value += this.current;
            this.advance();
        }
        return this.makeToken(TokenType.NUMBER, value, start);
    }
    readIdentifier() {
        const start = this.column;
        let value = '';
        while (!this.isAtEnd() && (this.isAlphaNumeric(this.current) || this.current === '_')) {
            value += this.current;
            this.advance();
        }
        const tokenType = this.keywords.get(value) || TokenType.IDENTIFIER;
        return this.makeToken(tokenType, value, start);
    }
    readOperator() {
        const start = this.column;
        const char = this.current;
        this.advance();
        switch (char) {
            case '+': return this.makeToken(TokenType.PLUS, char, start);
            case '-': return this.makeToken(TokenType.MINUS, char, start);
            case '*': return this.makeToken(TokenType.STAR, char, start);
            case '/': return this.makeToken(TokenType.SLASH, char, start);
            case '(': return this.makeToken(TokenType.LEFT_PAREN, char, start);
            case ')': return this.makeToken(TokenType.RIGHT_PAREN, char, start);
            case '{': return this.makeToken(TokenType.LEFT_BRACE, char, start);
            case '}': return this.makeToken(TokenType.RIGHT_BRACE, char, start);
            case '[': return this.makeToken(TokenType.LEFT_BRACKET, char, start);
            case ']': return this.makeToken(TokenType.RIGHT_BRACKET, char, start);
            case ',': return this.makeToken(TokenType.COMMA, char, start);
            case '.': return this.makeToken(TokenType.DOT, char, start);
            case ':': return this.makeToken(TokenType.COLON, char, start);
            case ';': return this.makeToken(TokenType.SEMICOLON, char, start);
            case '=':
                if (this.current === '=') {
                    this.advance();
                    return this.makeToken(TokenType.EQUALS_EQUALS, '==', start);
                }
                return this.makeToken(TokenType.EQUALS, char, start);
            case '!':
                if (this.current === '=') {
                    this.advance();
                    return this.makeToken(TokenType.NOT_EQUALS, '!=', start);
                }
                return this.makeToken(TokenType.BANG, char, start);
            case '<':
                if (this.current === '=') {
                    this.advance();
                    return this.makeToken(TokenType.LESS_EQUALS, '<=', start);
                }
                return this.makeToken(TokenType.LESS_THAN, char, start);
            case '>':
                if (this.current === '=') {
                    this.advance();
                    return this.makeToken(TokenType.GREATER_EQUALS, '>=', start);
                }
                return this.makeToken(TokenType.GREATER_THAN, char, start);
            default:
                throw new Error(`Unexpected character: ${char} at line ${this.line}, column ${start}`);
        }
    }
    skipWhitespace() {
        while (!this.isAtEnd()) {
            const char = this.current;
            if (char === ' ' || char === '\t' || char === '\r') {
                this.advance();
            }
            else if (char === '\n') {
                this.line++;
                this.column = 0;
                this.advance();
            }
            else {
                break;
            }
        }
    }
    advance() {
        this.position++;
        this.column++;
        this.current = this.source[this.position] || '';
    }
    isAtEnd() {
        return this.position >= this.source.length;
    }
    isDigit(char) {
        return char >= '0' && char <= '9';
    }
    isAlpha(char) {
        return (char >= 'a' && char <= 'z') ||
            (char >= 'A' && char <= 'Z') ||
            char === '_';
    }
    isAlphaNumeric(char) {
        return this.isAlpha(char) || this.isDigit(char);
    }
    makeToken(type, value, column) {
        return {
            type,
            value,
            line: this.line,
            column: column || this.column
        };
    }
}
exports.Lexer = Lexer;
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