import {validateObject} from './validate_object';
import {validateString} from './validate_string';
import {ValidationError} from '../error/validation_error';

interface ValidateSpriteOptions {
    key: 'sprite';
    value: unknown; // we don't know how the user defined the "sprite"
    validateSpec: Function;
}

export function validateSprite(options: ValidateSpriteOptions) {
    let errors = [];

    const sprite = options.value;
    const key = options.key;

    if (!Array.isArray(sprite)) {
        return validateString({
            key,
            value: sprite
        });
    } else {
        const allSpriteIds = [];
        const allSpriteURLs = [];

        for (const i in sprite) {
            if (sprite[i].id && allSpriteIds.includes(sprite[i].id))
                errors.push(
                    new ValidationError(
                        key,
                        sprite,
                        `all the sprites' ids must be unique, but ${sprite[i].id} is duplicated`
                    )
                );
            allSpriteIds.push(sprite[i].id);

            if (sprite[i].url && allSpriteURLs.includes(sprite[i].url))
                errors.push(
                    new ValidationError(
                        key,
                        sprite,
                        `all the sprites' URLs must be unique, but ${sprite[i].url} is duplicated`
                    )
                );
            allSpriteURLs.push(sprite[i].url);

            const pairSpec = {
                id: {
                    type: 'string',
                    required: true
                },
                url: {
                    type: 'string',
                    required: true
                }
            };

            errors = errors.concat(
                validateObject({
                    key: `${key}[${i}]`,
                    value: sprite[i],
                    valueSpec: pairSpec,
                    validateSpec: options.validateSpec
                })
            );
        }

        return errors;
    }
}