import m from "mithril"
import {Form, iForm} from "./widgets/form"
import { Input, iInput, Textarea, iTextarea} from "./widgets/inputs"
import {Treenode, iTreenode, Treetable, iTreetable, TopbarButton, iTopbarButton} from "./widgets/Treetable_V2"
import {BreadcrumbBar, iBreadcrumb, iBreadcrumbBar, parseBc, serializeBc} from "./widgets/breadcrumb"
import {iKontakt, fetchKontakte, fetchKontaktById, createKontaktREST, updateKontaktREST} from "../models/kontakt"
import {iKunde, fetchKundeById} from "../models/kunde"
import {showServerError} from "./auth/authmessages"
import {guardedNavigate, DirtyMaskHelper} from "./widgets/dirtyguard"

export const kontaktliste: m.ClosureComponent = (vnode) => {
    let treenodes: iTreenode[] = []
    let selectedNode: iTreenode | null = null
    let filterKundenId: number | null = null
    // Kundenname für die Überschrift, asynchron per fetchKundeById
    // aufgelöst, falls nicht in den Route-Params enthalten.
    let kundenName: string = ""
    // Breadcrumb-Kette der Vorgänger-Ansichten (aus Route-Param bc).
    let breadcrumbs: iBreadcrumb[] = []

    const handleRowMarked = (node: iTreenode) => {
        selectedNode = node
    }

    // Eigener Listen-Crumb für die Breadcrumb-Kette.
    const ownCrumb = (): iBreadcrumb => ({
        route: "/kontaktliste",
        params: filterKundenId !== null ? {kunden_id: filterKundenId} : {},
        label: filterKundenId !== null ? "Kontakte: " + kundenName : "Kontakte"
    })

    const addKontaktRoute = () => {
        const params: any = {id: -1}
        // Nur bei kundengefilterter Liste den Kunden vorbelegen.
        if (filterKundenId !== null) {
            params.kunden_id = filterKundenId
            params.kunden_name = kundenName
        }
        // Breadcrumb-Kette um eigene Position erweitern.
        params.bc = serializeBc([...breadcrumbs, ownCrumb()])
        m.route.set("/kontakt", params)
    }

    const editKontakt = (kontakt: iKontakt, e: Event) => {
        e.stopPropagation()
        // Breadcrumb-Kette um eigene Position erweitern.
        m.route.set("/kontakt", {id: kontakt.id, bc: serializeBc([...breadcrumbs, ownCrumb()])})
    }

    const columnmapper: (node: iTreenode) => any[] = (node: iTreenode) => {
        let kontakt: iKontakt = node.nodevalue

        return [
            m("div", m("strong", kontakt.name)),
            m("span", kontakt.position),
            m("span", kontakt.telefon),
            m("span", kontakt.email),
            m("span", kontakt.kunden_name),
            m("button.w3-button.w3-small", {style: {padding: '0 2px'}, onclick: (e: Event) => editKontakt(kontakt, e)}, m("i.material-icons", "edit"))
        ]
    }

    const filterFunction = (node: iTreenode, searchvalue: string): boolean => {
        let kontakt: iKontakt = node.nodevalue
        let searchLower = searchvalue.toLowerCase()
        return (kontakt.name || "").toLowerCase().includes(searchLower) ||
               (kontakt.position || "").toLowerCase().includes(searchLower) ||
               (kontakt.telefon || "").toLowerCase().includes(searchLower) ||
               (kontakt.email || "").toLowerCase().includes(searchLower) ||
               (kontakt.kunden_name || "").toLowerCase().includes(searchLower)
    }

    return {
        oninit: (vnode) => {
            const routeParams = m.route.param()
            if (routeParams && routeParams.kunden_id) {
                filterKundenId = parseInt(routeParams.kunden_id)
                kundenName = routeParams.kunden_name || ""
            } else {
                filterKundenId = null
                kundenName = ""
            }
            // Breadcrumb-Kette aus Route-Param parsen.
            breadcrumbs = parseBc(routeParams && routeParams.bc)
            // Kontakte asynchron vom Server laden. Die Filterung nach
            // kunden_id erfolgt serverseitig, sofern ein Filter gesetzt ist.
            fetchKontakte(filterKundenId !== null ? filterKundenId : undefined).then((result) => {
                treenodes = result.map((kontakt: iKontakt) => new Treenode(kontakt, true, []))
            }).catch((e) => showServerError(e))
            // Kundennamen asynchron auflösen, falls nicht in Route-Params.
            if (filterKundenId !== null && kundenName === "") {
                fetchKundeById(filterKundenId).then((kunde: iKunde) => {
                    kundenName = kunde.name
                }).catch((e) => showServerError(e))
            }
        },
        view: (vnode) => {
            return m("div.w3-container.w3-auto", {
                style: {
                    display: 'flex',
                    'flex-direction': 'column',
                    height: 'inherit',
                    'overflow-y': 'inherit'}},
                m("h1", kundenName ? "Kontaktliste für " + kundenName : "Kontaktliste"),
                m(BreadcrumbBar, {
                    breadcrumbs: breadcrumbs,
                    current: filterKundenId !== null ? "Kontakte: " + kundenName : "Kontakte"
                } as iBreadcrumbBar),
                m("div", {style: {flex: '1', 'overflow-y': 'inherit'}},
                    m(Treetable,
                        {
                            treenodes: treenodes,
                            columnmapper: columnmapper,
                            filter: filterFunction,
                            onRowMarked: handleRowMarked,
                            isSelected: (node: iTreenode) => node === selectedNode
                        } as iTreetable,
                        m(TopbarButton, {onclick: addKontaktRoute, tooltip: "Neuen Kontakt anlegen"} as iTopbarButton,
                            m("i.material-icons", "person_add")
                        )
                    )
                )
            )
        }
    }
}

export const Kontakt: m.ClosureComponent = (vnode) => {
    // currentKontakt hält den Formularzustand. kunden_id referenziert den
    // Kunden eindeutig, kunden_name dient der Anzeige in der Überschrift.
    let currentKontakt: {
        id: number
        kunden_id: number
        kunden_name: string
        anrede: string
        name: string
        position: string
        telefon: string
        email: string
        notiz: string
    } = {
        id: -1,
        kunden_id: -1,
        kunden_name: "",
        anrede: "",
        name: "",
        position: "",
        telefon: "",
        email: "",
        notiz: ""
    }
    // Breadcrumb-Kette der Vorgänger-Ansichten (aus Route-Param bc).
    let breadcrumbs: iBreadcrumb[] = []
    // Route-Params für die Rückkehr zur Kontaktliste; als Closure an den
    // DirtyMaskHelper übergeben, da dieser die maskenspezifischen Variablen
    // (currentKontakt, breadcrumbs) nicht kennt.
    const backParams = (): any => {
        const listBc = serializeBc(breadcrumbs.slice(0, -1))
        const params: any = {kunden_id: currentKontakt.kunden_id, kunden_name: currentKontakt.kunden_name}
        if (listBc) params.bc = listBc
        return params
    }
    // DirtyMaskHelper kapselt den isDirty/Guard-Boilerplate.
    const guard = new DirtyMaskHelper("/kontaktliste", backParams)

    return {
        oninit: (vnode) => {
            const routeParams = m.route.param()
            const id = routeParams && routeParams.id ? parseInt(routeParams.id) : -1
            // Breadcrumb-Kette aus Route-Param parsen.
            breadcrumbs = parseBc(routeParams && routeParams.bc)
            guard.registerGuard()
            if (id !== -1) {
                // Kontaktdaten frisch vom Server holen, um zwischenzeitliche
                // Änderungen anderer Nutzer nicht zu überschreiben.
                fetchKontaktById(id).then((result) => {
                    currentKontakt = result
                }).catch((e) => showServerError(e))
            } else {
                // Neuanlegen: kunden_id und kunden_name aus Route-Params
                // (voreingestellt aus der Kontaktliste).
                currentKontakt.kunden_id = routeParams && routeParams.kunden_id ? parseInt(routeParams.kunden_id) : -1
                currentKontakt.kunden_name = routeParams && routeParams.kunden_name ? routeParams.kunden_name : ""
            }
        },
        onremove: (vnode) => {
            guard.cleanup()
        },
        view: (vnode) => {
            const submit = (form: HTMLFormElement): boolean => {
                const formData = new FormData(form)
                const gespeicherterKontakt: iKontakt = {
                    id: currentKontakt.id,
                    kunden_id: currentKontakt.kunden_id,
                    kunden_name: "",
                    anrede: (formData.get("anrede") as string) || "",
                    name: (formData.get("name") as string) || "",
                    position: (formData.get("position") as string) || "",
                    telefon: (formData.get("telefon") as string) || "",
                    email: (formData.get("email") as string) || "",
                    notiz: (formData.get("notiz") as string) || ""
                }
                if (currentKontakt.id === -1) {
                    createKontaktREST(gespeicherterKontakt).then(() => guard.navigateAfterSave()).catch((e) => { showServerError(e); guard.markDirty() })
                } else {
                    updateKontaktREST(gespeicherterKontakt).then(() => guard.navigateAfterSave()).catch((e) => { showServerError(e); guard.markDirty() })
                }
                return true
            }
            return m("div.w3-container.w3-auto.form-view-container",
                m("h1", currentKontakt.id === -1
                    ? "Neuer Kontakt für " + currentKontakt.kunden_name
                    : "Kontakt-Stammblatt"),
                m(BreadcrumbBar, {
                    breadcrumbs: breadcrumbs,
                    current: currentKontakt.id === -1 ? "Neuer Kontakt" : "Kontakt-Stammblatt",
                    onnavigate: guardedNavigate
                } as iBreadcrumbBar),
                m("div", {style: {flex: '1', 'min-height': '0'}},
                    m(Form, guard.formAttrs(submit) as iForm, [
                    m("input", {type: "hidden", name: "kunden_id", value: currentKontakt.kunden_id}),
                    m("label", "Anrede", m(Input, {name: "anrede", value: currentKontakt.anrede, type: "text"} as iInput)),
                    m("label", "Name", m(Input, {name: "name", value: currentKontakt.name, type: "text", required: true} as iInput)),
                    m("label", "Position", m(Input, {name: "position", value: currentKontakt.position, type: "text"} as iInput)),
                    m("label", "Telefon", m(Input, {name: "telefon", value: currentKontakt.telefon, type: "tel"} as iInput)),
                    m("label", "E-Mail", m(Input, {name: "email", value: currentKontakt.email, type: "email"} as iInput)),
                    m("label", "Notiz", m(Textarea, {name: "notiz", value: currentKontakt.notiz, rows: 4} as iTextarea))
                    ])
                )
            )
        }
    }
}