import log from "./log"

export default class Model {
    constructor() {
        this.state = {
            api: {
                link: "https://data.enseignementsup-recherche.gouv.fr/api/records/1.0/search/?dataset=fr-esr-parcoursup&q=&lang=fr&rows=0&sort=tri",
                facet: {
                    filiaire: "fili",
                    formation: "form_lib_voe_acc",
                    spec: "fil_lib_voe_acc"
                }
            },
            page: {
                curIndex: 0, /* section n.0 -> n.2. */
                cat: null,
                path: ["", "", ""],
                name: [
                    "formation",
                    "filière de formation",
                    "filière de formation détaillée"
                ],
            }
        }

        log("Selector",  "Model 2/3")
    }

    getCurIndex() {
        return this.state.page.curIndex
    }

    nextPage() {
        if(this.state.page.curIndex+1 <= 2) {
            this.state.page.curIndex++
        }
    }

    previousPage() {
        if(this.state.page.curIndex-1 >= 0) {
            this.state.page.curIndex--
        }
    }

    setCat(v) {
        this.state.page.cat = v
    }

    getModelData0() {
        if(!localStorage.getItem(`sec0`)) {
            const link = `${ this.state.api.link }` +
                                `&facet=${this.state.api.facet.filiaire}`

            return fetch(link)
                .then((res) => res.json())
                .then((data) => {
                    if(data) {
                        localStorage.setItem(`sec0`, JSON.stringify(data.facet_groups[0].facets))
                        return data.facet_groups[0].facets
                    } else {
                        return null
                    }
                })
        } else {
            return new Promise((resolve, reject) => {
                resolve(JSON.parse(localStorage.getItem(`sec0`)))
            })
        }
    }

    getModelData1() {
        if(!localStorage.getItem(`sec1-${this.state.page.cat}`)) {
            const link = `${this.state.api.link}` +
            `&facet=${this.state.api.facet.filiaire}` +
            `&facet=${this.state.api.facet.formation}` +
            `&facet=${this.state.api.facet.spec}` +
            `&refine.${this.state.api.facet.filiaire}=${this.state.page.cat}`

            return fetch(link)
                .then((res) => res.json())
                .then((data) => {
                    if(data) {
                        localStorage.setItem(`sec1-${this.state.page.cat}`, JSON.stringify(data.facet_groups[1].facets))
                        return data.facet_groups[1].facets
                    } else {
                        return null
                    }
                })
        } else {
            return new Promise((resolve, reject) => {
                resolve(JSON.parse(localStorage.getItem(`sec1-${this.state.page.cat}`)))
            })
        }
    }

    getModelData2() {
        if(!localStorage.getItem(`sec2-${this.state.page.cat}`)) {
            const link = `${this.state.api.link}` +
            `&facet=${this.state.api.facet.filiaire}` +
            `&facet=${this.state.api.facet.formation}` +
            `&facet=${this.state.api.facet.spec}` +
            `&refine.${this.state.api.facet.filiaire}=${this.state.page.cat}`

            return fetch(link)
                .then((res) => res.json())
                .then((data) => {
                    if(data) {
                        localStorage.setItem(`sec2-${this.state.page.cat}`, JSON.stringify(data.facet_groups[2].facets))
                        return data.facet_groups[2].facets
                    } else {
                        return null
                    }
                })
        } else {
            return new Promise((resolve, reject) => {
                resolve(JSON.parse(localStorage.getItem(`sec2-${this.state.page.cat}`)))
            })
        }
    }
}