import {createStore} from 'vuex';
import router from './router';

import * as base64 from 'base-64';
import * as utf8 from 'utf8';
import {ticketStateColorLookup, ticketStateIconLookup, http} from "@/utils";
import sharedStatePlugin from "@/shared-state-plugin";
import persistentStatePlugin from "@/persistent-state-plugin";
import {triggerRef} from "vue";

const store = createStore({
    state: {
        keyIncrement: 0,
        events: [],
        loadedItems: [],
        itemCache: {},
        loadedBoxes: [],
        toasts: [],
        tickets: [],
        users: [],
        groups: [],
        state_options: [],
        lastEvent: '37C3',
        lastUsed: {},
        remember: false,
        user: {
            username: null,
            password: null,
            permissions: [],
            token: null,
            expiry: null,
        },

        thumbnailCache: {},
        fetchedData: {
            events: 0,
            items: 0,
            boxes: 0,
            tickets: 0,
            users: 0,
            groups: 0,
            states: 0,
        },
        persistent_loaded: false,
        shared_loaded: false,
        afterInitHandlers: [],

        showAddBoxModal: false,
    },
    getters: {
        route: state => router.currentRoute.value,
        getEventSlug: state => router.currentRoute.value.params.event ? router.currentRoute.value.params.event : state.lastEvent,
        getActiveView: state => router.currentRoute.value.name || 'items',
        getFilters: state => router.currentRoute.value.query,
        getBoxes: state => state.loadedBoxes,
        checkPermission: state => (event, perm) => state.user.permissions &&
            (state.user.permissions.includes(`${event}:${perm}`) || state.user.permissions.includes(`*:${perm}`)),
        hasPermissions: state => state.user.permissions && state.user.permissions.length > 0,
        activeUser: state => state.user.username || 'anonymous',
        stateInfo: state => (slug) => {
            const obj = state.state_options.filter((s) => s.value === slug)[0];
            if (obj) {
                return {
                    color: ticketStateColorLookup(obj.value),
                    icon: ticketStateIconLookup(obj.value),
                    slug: obj.value,
                    text: obj.text,
                }
            } else {
                return {
                    color: 'danger',
                    icon: 'exclamation',
                    slug: slug,
                    text: 'Unknown'
                }
            }
        },
        layout: (state, getters) => {
            if (router.currentRoute.value.query.layout)
                return router.currentRoute.value.query.layout;
            if (getters.getActiveView === 'items')
                return 'cards';
            if (getters.getActiveView === 'tickets')
                return 'tasks';
        },
        isLoggedIn(state) {
            return state.user && state.user.username !== null && state.user.token !== null;
        },
        getThumbnail: (state) => (url) => {
            if (!url) return null;
            if (!(url in state.thumbnailCache))
                return null;
            return state.thumbnailCache[url];
        },
    },
    mutations: {
        updateLastUsed(state, diff) {
            state.lastUsed = {...state.lastUsed, ...diff};
        },
        updateLastEvent(state, slug) {
            state.lastEvent = slug;
        },
        replaceEvents(state, events) {
            state.events = events;
            state.fetchedData = {...state.fetchedData, events: Date.now()};
        },
        replaceTicketStates(state, states) {
            state.state_options = states;
            state.fetchedData = {...state.fetchedData, states: Date.now()};
        },
        changeView(state, {view, slug}) {
            router.push({path: `/${slug}/${view}`});
        },
        replaceLoadedItems(state, newItems) {
            state.loadedItems = newItems;
            state.fetchedData = {...state.fetchedData, items: Date.now()}; // TODO: manage caching items for different events and search results correctly
        },
        setItemCache(state, {slug, items}) {
            state.itemCache[slug] = items;
        },
        replaceBoxes(state, loadedBoxes) {
            state.loadedBoxes = loadedBoxes;
            state.fetchedData = {...state.fetchedData, boxes: Date.now()};
        },
        updateItem(state, updatedItem) {
            const item = state.loadedItems.filter(({uid}) => uid === updatedItem.uid)[0];
            Object.assign(item, updatedItem);
        },
        removeItem(state, item) {
            state.loadedItems = state.loadedItems.filter(it => it !== item);
        },
        appendItem(state, item) {
            state.loadedItems.push(item);
        },
        replaceTickets(state, tickets) {
            state.tickets = tickets;
            state.fetchedData = {...state.fetchedData, tickets: Date.now()};
        },
        updateTicket(state, updatedTicket) {
            const ticket = state.tickets.filter(({id}) => id === updatedTicket.id)[0];
            Object.assign(ticket, updatedTicket);
            //triggerRef(state.tickets);
            state.tickets = [...state.tickets];
        },
        replaceUsers(state, users) {
            state.users = users;
            state.fetchedData = {...state.fetchedData, users: Date.now()};
        },
        replaceGroups(state, groups) {
            state.groups = groups;
            state.fetchedData = {...state.fetchedData, groups: Date.now()};
        },
        openAddBoxModal(state) {
            state.showAddBoxModal = true;
        },
        closeAddBoxModal(state) {
            state.showAddBoxModal = false;
        },
        createToast(state, {title, message, color}) {
            var toast = {title, message, color, key: state.keyIncrement}
            state.toasts.push(toast);
            state.keyIncrement += 1;
            return toast;
        },
        removeToast(state, key) {
            state.toasts = state.toasts.filter(toast => toast.key !== key);
        },
        setRemember(state, remember) {
            state.remember = remember;
        },
        setUser(state, user) {
            state.user.username = user;
        },
        setPassword(state, password) {
            state.user.password = password;
        },
        setPermissions(state, permissions) {
            state.user.permissions = permissions;
        },
        setToken(state, {token, expiry}) {
            const user = {...state.user};
            user.token = token;
            user.expiry = expiry;
            state.user = user;
        },
        setUserInfo(state, user) {
            state.user = user;
        },
        logout(state) {
            const user = {...state.user};
            user.user = null;
            user.password = null;
            user.token = null;
            user.expiry = null;
            user.permissions = null;
            state.user = user;
        },
        setThumbnail(state, {url, data}) {
            state.thumbnailCache[url] = data;
        },
    },
    actions: {
        async login({commit}, {username, password, remember}) {
            commit('setRemember', remember);
            try {
                const data = await fetch('/api/2/login/', {
                    method: 'POST',
                    headers: {'Content-Type': 'application/json'},
                    body: JSON.stringify({username: username, password: password}),
                    credentials: 'omit'
                }).then(r => r.json())
                if (data && data.token) {
                    const {data: {permissions}} = await http.get('/2/self/', data.token);
                    commit('setUserInfo', {...data, permissions, username, password});
                    return true;
                } else {
                    return false;
                }
            } catch (e) {
                console.error(e);
                return false;
            }
        },
        async reloadToken({commit, state, getters}) {
            try {
                if (state.user.username && state.user.password) {
                    const data = await fetch('/api/2/login/', {
                        method: 'POST',
                        headers: {'Content-Type': 'application/json'},
                        body: JSON.stringify({username: state.user.username, password: state.user.password}),
                        credentials: 'omit'
                    }).then(r => r.json()).catch(e => console.error(e))
                    if (data && data.token) {
                        commit('setToken', data);
                        return true;
                    }
                }
            } catch (e) {
                console.error(e);
            }
            //credentials failed, logout
            store.commit('logout');
        },
        //async verifyToken({commit, state}) {
        async afterLogin({dispatch, state}) {
            let promises = [];
            promises.push(dispatch('loadBoxes'));
            promises.push(dispatch('fetchTicketStates'));
            promises.push(dispatch('loadEventItems'));
            promises.push(dispatch('loadTickets'));
            if (!state.user.permissions) {
                promises.push(dispatch('loadUserInfo'));
            }
            await Promise.all(promises);
        },
        async afterSharedInit({dispatch, state}) {
            const handlers = state.afterInitHandlers;
            state.afterInitHandlers = [];
            await Promise.all(handlers.map(h => h()).flat());
        },
        scheduleAfterInit({dispatch, state}, handler) {
            if (state.shared_loaded) {
                Promise.all(handler()).then(() => {
                });
            } else {
                state.afterInitHandlers.push(handler);
            }
        },
        async fetchImage({state}, url) {
            return await fetch(url, {headers: {'Authorization': `Token ${state.user.token}`}});
        },
        async loadUserInfo({commit, state}) {
            const {data, success} = await http.get('/2/self/', state.user.token);
            commit('setPermissions', data.permissions);
        },
        async loadEvents({commit, state}) {
            if (!state.user.token) return;
            if (state.fetchedData.events > Date.now() - 1000 * 60 * 60 * 24) return;
            const {data, success} = await http.get('/2/events/', state.user.token);
            if (data && success)
                commit('replaceEvents', data);
        },
        async fetchTicketStates({commit, state}) {
            if (!state.user.token) return;
            if (state.fetchedData.states > Date.now() - 1000 * 60 * 60 * 24) return;
            const {data, success} = await http.get('/2/tickets/states/', state.user.token);
            if (data && success)
                commit('replaceTicketStates', data);
        },
        changeEvent({dispatch, getters, commit}, eventName) {
            router.push({path: `/${eventName.slug}/${getters.getActiveView}/`});
            dispatch('loadEventItems');
        },
        changeView({getters}, link) {
            router.push({path: `/${getters.getEventSlug}/${link.path}/`});
        },
        showBoxContent({getters}, box) {
            router.push({path: `/${getters.getEventSlug}/items/`, query: {box}});
        },
        async loadEventItems({commit, getters, state}) {
            if (!state.user.token) return;
            if (state.fetchedData.items > Date.now() - 1000 * 60 * 60 * 24) return;
            try {
                commit('replaceLoadedItems', []);
                const slug = getters.getEventSlug;
                if (slug in state.itemCache) {
                    commit('replaceLoadedItems', state.itemCache[slug]);
                }
                const {data, success} = await http.get(`/2/${slug}/items/`, state.user.token);
                if (data && success) {
                    commit('replaceLoadedItems', data);
                    commit('setItemCache', {slug, items: data});
                }
            } catch (e) {
                console.error("Error loading items");
            }
        },
        async searchEventItems({commit, getters, state}, query) {
            const foo = utf8.encode(query);
            const bar = base64.encode(foo);

            const {data, success} = await http.get(`/2/${getters.getEventSlug}/items/${bar}/`, state.user.token);
            if (data && success)
                commit('replaceLoadedItems', data);
        },
        async loadBoxes({commit, state}) {
            if (!state.user.token) return;
            if (state.fetchedData.boxes > Date.now() - 1000 * 60 * 60 * 24) return;
            const {data, success} = await http.get('/2/boxes/', state.user.token);
            if (data && success)
                commit('replaceBoxes', data);
        },
        async createBox({commit, dispatch, state}, box) {
            const {data, success} = await http.post('/2/boxes/', box, state.user.token);
            commit('replaceBoxes', data);
            dispatch('loadBoxes').then(() => {
                commit('closeAddBoxModal');
            });
        },
        async deleteBox({commit, dispatch, state}, box_id) {
            await http.delete(`/2/boxes/${box_id}/`, state.user.token);
            dispatch('loadBoxes');
        },
        async updateItem({commit, getters, state}, item) {
            const {
                data,
                success
            } = await http.put(`/2/${getters.getEventSlug}/item/${item.uid}/`, item, state.user.token);
            commit('updateItem', data);
        },
        async markItemReturned({commit, getters, state}, item) {
            await http.patch(`/2/${getters.getEventSlug}/item/${item.uid}/`, {returned: true}, state.user.token);
            commit('removeItem', item);
        },
        async deleteItem({commit, getters, state}, item) {
            await http.delete(`/2/${getters.getEventSlug}/item/${item.uid}/`, item, state.user.token);
            commit('removeItem', item);
        },
        async postItem({commit, getters, state}, item) {
            commit('updateLastUsed', {box: item.box, cid: item.cid});
            const {data, success} = await http.post(`/2/${getters.getEventSlug}/item/`, item, state.user.token);
            commit('appendItem', data);
        },
        async loadTickets({commit, state}) {
            if (!state.user.token) return;
            if (state.fetchedData.tickets > Date.now() - 1000 * 60 * 60 * 24) return;
            const {data, success} = await http.get('/2/tickets/', state.user.token);
            if (data && success)
                commit('replaceTickets', data);
        },
        async sendMail({commit, dispatch, state}, {id, message}) {
            const {data, success} = await http.post(`/2/tickets/${id}/reply/`, {message}, state.user.token);
            if (data && success) {
                state.fetchedData.tickets = 0;
                await dispatch('loadTickets');
            }
        },
        async postManualTicket({commit, dispatch, state}, {sender, message, title,}) {
            const {data, success} = await http.post(`/2/tickets/manual/`, {
                name: title,
                sender,
                body: message,
                recipient: 'mail@c3lf.de'
            }, state.user.token);
            await dispatch('loadTickets');
        },
        async postComment({commit, dispatch, state}, {id, message}) {
            const {data, success} = await http.post(`/2/tickets/${id}/comment/`, {comment: message}, state.user.token);
            if (data && success) {
                state.fetchedData.tickets = 0;
                await dispatch('loadTickets');
            }
        },
        async loadUsers({commit, state}) {
            if (!state.user.token) return;
            if (state.fetchedData.users > Date.now() - 1000 * 60 * 60 * 24) return;
            const {data, success} = await http.get('/2/users/', state.user.token);
            if (data && success)
                commit('replaceUsers', data);
        },
        async loadGroups({commit, state}) {
            if (!state.user.token) return;
            if (state.fetchedData.groups > Date.now() - 1000 * 60 * 60 * 24) return;
            const {data, success} = await http.get('/2/groups/', state.user.token);
            if (data && success)
                commit('replaceGroups', data);
        },
        async updateTicket({commit, state}, ticket) {
            const {data, success} = await http.put(`/2/tickets/${ticket.id}/`, ticket, state.user.token);
            commit('updateTicket', data);
        },
        async updateTicketPartial({commit, state}, {id, ...ticket}) {
            const {data, success} = await http.patch(`/2/tickets/${id}/`, ticket, state.user.token);
            commit('updateTicket', data);
        }
    },
    plugins: [
        persistentStatePlugin({ // TODO change remember to some kind of enable field
            prefix: "lf_",
            debug: false,
            isLoadedKey: "persistent_loaded",
            state: [
                "remember",
                "user",
                "events",
                "lastUsed",
            ]
        }),
        sharedStatePlugin({
            debug: true,
            isLoadedKey: "shared_loaded",
            clearingMutation: "logout",
            afterInit: "afterSharedInit",
            state: [
                "test",
                "state_options",
                "fetchedData",
                "tickets",
                "users",
                "groups",
                "loadedBoxes",
                "loadedItems",
            ],
            watch: [
                "test",
                "state_options",
                "fetchedData",
                "tickets",
                "users",
                "groups",
                "loadedBoxes",
                "loadedItems",
            ],
            mutations: [
                //"replaceTickets",
            ],
        }),
    ],
});

store.watch((state) => state.user, (user) => {
    if (store.getters.isLoggedIn) {
        if (router.currentRoute.value.name === 'login' && router.currentRoute.value.query.redirect)
            router.push(router.currentRoute.value.query.redirect);
        else if (router.currentRoute.value.name === 'login')
            router.push('/');
    } else {
        if (router.currentRoute.value.name !== 'login') {
            router.push({
                name: 'login',
                query: {redirect: router.currentRoute.value.fullPath},
            });
        }
    }
});

export default store;