import { cifProcessDataLine } from "./cif_process_data_line";
import { cifProcessLoop } from "./cif_process_loop";

const LOOP_START = /^(\s*)loop_(\s*)$/i;

export function cifParser(lines: string[]): any {
    lines.reverse();

    const result: any = {
    };

    while (lines.length > 0) {
        const line = lines[lines.length - 1];

        if (line.length > 1 && line.startsWith("_")) {
            const dataLine = cifProcessDataLine(lines);
            for (const key of Object.keys(dataLine)) {
                result[key] = dataLine[key];
            }
            continue;
        }

        if (lines.length > 2 && (line.startsWith("loop_") || line.startsWith("lOOP_")) && LOOP_START.exec(line)) {
            lines.pop();
            const loopData = cifProcessLoop(lines);
            if (loopData) {
                result.loop_ = result.loop_ || [];
                result.loop_.push(loopData);
            }

            continue;
        }

        lines.pop();
    }

    return result;
}