import APIParseError from './APIParseError.js'

export default class CRUDBase {
    endpoint = '/api/v1'
    required_fields = []

    listing_definition = {}
    form_definition = {}

    item = ''
    plural = ''

    async list() {
        const results = await axios.get(this._endpoint())
        if ( results && results.data && Array.isArray(results.data.data) ) return results.data.data
        else throw new APIParseError()
    }

    async get(id) {
        const results = await axios.get(this._endpoint(id))
        if ( results && results.data && results.data.data ) return results.data.data
        else throw new APIParseError()
    }

    async create(properties) {
        for ( const field of this.required_fields ) {
            if ( !properties[field] ) throw new Error(`Missing required field: ${field}`)
        }

        const results = await axios.post(this._endpoint(), properties)
        if ( results && results.data && results.data.data ) return results.data.data
        else throw new APIParseError()
    }

    async update(id, properties) {
        for ( const field of this.required_fields ) {
            if ( !properties[field] ) throw new Error(`Missing required field: ${field}`)
        }

        await axios.patch(this._endpoint(id), properties)
    }

    async delete(id) {
        await axios.delete(this._endpoint(id))
    }

    _endpoint(sub = '/') {
        let first = this.endpoint
        if ( !first.startsWith('/') ) first = `/${first}`
        if ( first.endsWith('/') ) first = first.slice(0, -1)

        if ( !sub.startsWith('/') ) sub = `/${sub}`
        return `${first}${sub}`
    }
}