'use strict';

/**
 * Base repository class providing common data access methods.
 * Extend this class to create entity-specific repositories.
 */
class BaseRepository {
    constructor(model) {
        this.model = model;
    }

    async findById(id, options = {}) {
        return this.model.findByPk(id, options);
    }

    async findOne(where, options = {}) {
        return this.model.findOne({ where, ...options });
    }

    async findAll(where = {}, options = {}) {
        return this.model.findAll({ where, ...options });
    }

    async create(data, options = {}) {
        return this.model.create(data, options);
    }

    async update(instance, data, options = {}) {
        return instance.update(data, options);
    }

    async destroy(instance, options = {}) {
        return instance.destroy(options);
    }

    async count(where = {}, options = {}) {
        return this.model.count({ where, ...options });
    }

    async exists(where) {
        const count = await this.count(where);
        return count > 0;
    }
}

module.exports = BaseRepository;