export const SOURCE_DEBUG_ID_VARIABLE = '_btDebugIds';
export const SOURCE_DEBUG_ID_COMMENT = 'debugId';
export const SOURCEMAP_DEBUG_ID_KEY = 'debugId';

export class DebugIdGenerator {
    public generateSourceSnippet(uuid: string) {
        return `;!function(){try{var e="undefined"!=typeof window?window:"undefined"!=typeof global?global:"undefined"!=typeof self?self:{},n=(new Error).stack;n&&(e.${SOURCE_DEBUG_ID_VARIABLE}=e.${SOURCE_DEBUG_ID_VARIABLE}||{},e.${SOURCE_DEBUG_ID_VARIABLE}[n]="${uuid}")}catch(e){}}();`;
    }

    public generateSourceComment(uuid: string) {
        return `//# ${SOURCE_DEBUG_ID_COMMENT}=${uuid}`;
    }

    public getSourceDebugId(source: string): string | undefined {
        const regex = new RegExp(`^//# ${SOURCE_DEBUG_ID_COMMENT}=(.+)$`, 'm');
        const match = source.match(regex);
        if (!match) {
            return undefined;
        }

        return match[1];
    }

    public addSourceMapDebugId<T extends object>(sourceMap: T, uuid: string): T & { [SOURCEMAP_DEBUG_ID_KEY]: string } {
        return {
            ...sourceMap,
            [SOURCEMAP_DEBUG_ID_KEY]: uuid,
        };
    }

    public getSourceMapDebugId(sourcemap: object): string | undefined {
        const debugId = (sourcemap as Record<string, unknown>)[SOURCEMAP_DEBUG_ID_KEY];
        if (typeof debugId !== 'string') {
            return undefined;
        }

        return debugId;
    }
}