class KeyframesModel extends WindozModel {

    constructor() {
        super()
        this.ressource = '/keyframes'
    }

    async list(kfId, prevKFId='') {
        let endpoint = {...app.config.api[this.ressource].list}
        const filters = {}
        //Caution, undefined is  != NULL here, because prev_kfId ull means root, while undefined means no filtering
        if((typeof(kfId) != 'undefined') && (kfId!=='')) filters['kfId'] = kfId
        if((typeof(prevKFId) != 'undefined') && (prevKFId!=='')) filters['prevKFId'] = prevKFId
        return ( 
            this.request(endpoint.uri, endpoint.method, filters)
        )
    }

    async getKeyframe(kfId){
        let endpoint = {...app.config.api[this.ressource].get}
        endpoint.uri = endpoint.uri.replace('{kfId}', kfId)
        return ( 
            this.request(endpoint.uri, endpoint.method, kfId)
        )
    }

    async create(kfData, prevKFId) {
        let endpoint = {...app.config.api[this.ressource].create}
        return ( 
            this.request(endpoint.uri, endpoint.method, kfData)
        )
    }

    async rename(kfData, prevKFId) {
        let endpoint = {...app.config.api[this.ressource].create}
        return ( 
            this.request(endpoint.uri, endpoint.method, kfData)
        )
    }

    #normalizeAxisVector(vec) {
        if(!vec || typeof(vec) !== 'object') return(null)
        const axes = ['x', 'y', 'z']
        const out = {}
        for(const axis of axes) {
            const n = Number(vec[axis])
            if(!Number.isFinite(n)) return(null)
            out[axis] = n
        }
        return(out)
    }

    async save(kfId, data) {
        const kfData = Object.keys(data).map(aid => {
            const { position, speed, ...storeValues} = data[aid].values
            const gpsPosition = this.#normalizeAxisVector(position)
            const gpsSpeed = this.#normalizeAxisVector(speed)
            if(!gpsPosition || !gpsSpeed) {
                throw(new Error(`Agent ${aid}: position and speed must be numeric vectors`))
            }
            return({
                aid: aid,   
                type: data[aid].type,
                storeValues: storeValues,
                gpsValues: { position: gpsPosition, speed: gpsSpeed },
            })
        })

        let endpoint = {...app.config.api[this.ressource].saveAgents}
        endpoint.uri = endpoint.uri.replace('{kfId}', kfId)
        return ( 
            this.request(endpoint.uri, endpoint.method, kfData)
        )
    }
  
}

app.registerClass('KeyframesModel', KeyframesModel);