import Vue from 'vue';
import Vuex from 'vuex';
import AxiosBootstrap from 'axios';
import * as _ from 'lodash/fp';
import router from '../router';

import * as base64 from 'base-64';
import * as utf8 from 'utf8';
import {ticketStateColorLookup, ticketStateIconLookup} from "@/utils";
import createMutationsSharer from "vuex-shared-mutations";

Vue.use(Vuex);
const axios = AxiosBootstrap.create({
    baseURL: '/api',
});
axios.interceptors.response.use(response => response, error => {
    if (error.response.status === 401) {
        console.log('401 interceptor fired');
        store.dispatch('reloadToken').then((ok) => {
            if (ok) {
                error.config.headers['Authorization'] = `Token ${store.state.token}`;
                return axios.request(error.config);
            }
        });
    } else if (error.response.status === 403) {
        const message = `
        <h3>Access denied.</h3>
        <p>
            url: ${error.config.url}
            <br>
            method: ${error.config.method}
            <br>
            response-body: ${error.response && error.response.body}
        </p>
        `;
        store.commit('createToast', {title: 'Error: Access denied', message, color: 'danger'});
        return Promise.reject(error)
    } else {
        console.error('error interceptor fired', error.message);

        if (error.isAxiosError) {
            const message = `
      <h3>A HTTP ${error.config.method} request failed.</h3>
      <p>
          url: ${error.config.url}
          <br>
          timeout: ${!!error.request.timeout}
          <br>
          response-body: ${error.response && error.response.body}
      </p>
    `;
            store.commit('createToast', {title: 'Error: HTTP', message, color: 'danger'});
        } else {
            store.commit('createToast', {title: 'Error: Unknown', message: error.toString(), color: 'danger'});
        }
        return Promise.reject(error);
    }
});

const store = new Vuex.Store({
    state: {
        keyIncrement: 0,
        events: [],
        layout: 'cards',
        loadedItems: [],
        itemCache: {},
        loadedBoxes: [],
        toasts: [],
        tickets: [],
        users: [],
        groups: [],
        lastEvent: localStorage.getItem('lf_lastEvent') || '37C3',
        lastUsed: JSON.parse(localStorage.getItem('lf_lastUsed') || '{}'),
        remember: false,
        user: null,
        password: null,
        userPermissions: [],
        token: null,
        state_options: [],
        token_expiry: null,
        local_loaded: false,
        showAddBoxModal: false,
    },
    getters: {
        getEventSlug: state => state.route && state.route.params.event ? state.route.params.event : state.lastEvent,
        getActiveView: state => state.route.name || 'items',
        getFilters: state => state.route.query,
        getBoxes: state => state.loadedBoxes,
        checkPermission: state => (event, perm) => state.userPermissions.includes(`${event}:${perm}`) || state.userPermissions.includes(`*:${perm}`),
        hasPermissions: state => state.userPermissions.length > 0,
        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'
                }
            }
        },
        isLoggedIn(state) {
            if (!state.local_loaded) {
                state.remember = localStorage.getItem('remember') === 'true';
                state.user = localStorage.getItem('user');
                //state.password = localStorage.getItem('password');
                state.userPermissions = JSON.parse(localStorage.getItem('permissions') || '[]');
                state.token = localStorage.getItem('token');
                state.token_expiry = localStorage.getItem('token_expiry');
                state.local_loaded = true;
                axios.defaults.headers.common['Authorization'] = `Token ${state.token}`;
            }

            return state.user !== null && state.token !== null;
        },
    },
    mutations: {
        updateLastUsed(state, diff) {
            state.lastUsed = _.extend(state.lastUsed, diff);
            localStorage.setItem('lf_lastUsed', JSON.stringify(state.lastUsed));
        },
        updateLastEvent(state, slug) {
            state.lastEvent = slug;
            localStorage.setItem('lf_lastEvent', slug);
        },
        replaceEvents(state, events) {
            state.events = events;
        },
        replaceTicketStates(state, states) {
            state.state_options = states;
        },
        changeView(state, {view, slug}) {
            router.push({path: `/${slug}/${view}`});
        },
        replaceLoadedItems(state, newItems) {
            state.loadedItems = newItems;
        },
        setItemCache(state, {slug, items}) {
            state.itemCache[slug] = items;
        },
        setLayout(state, layout) {
            state.layout = layout;
        },
        replaceBoxes(state, loadedBoxes) {
            state.loadedBoxes = loadedBoxes;
        },
        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;
        },
        replaceUsers(state, users) {
            state.users = users;
        },
        replaceGroups(state, groups) {
            state.groups = groups;
        },
        updateTicket(state, updatedTicket) {
            const ticket = state.tickets.filter(({id}) => id === updatedTicket.id)[0];
            Object.assign(ticket, updatedTicket);
        },
        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;
            localStorage.setItem('remember', remember);
        },
        setUser(state, user) {
            state.user = user;
            if (user)
                localStorage.setItem('user', user);
        },
        setPassword(state, password) {
            state.password = password;
        },
        setPermissions(state, permissions) {
            state.userPermissions = permissions;
            if (permissions)
                localStorage.setItem('permissions', JSON.stringify(permissions));
        },
        setToken(state, {token, expiry}) {
            state.token = token;
            state.token_expiry = expiry;
            if (token)
                localStorage.setItem('token', token);
            localStorage.setItem('token_expiry', expiry);
        },
        logout(state) {
            state.user = null;
            state.token = null;
            localStorage.removeItem('user');
            localStorage.removeItem('permissions');
            localStorage.removeItem('token');
            localStorage.removeItem('token_expiry');
            if (router.currentRoute.name !== 'login')
                router.push('/login');
        },
    },
    actions: {
        async login({commit, dispatch, state}, {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) {
                    commit('setToken', data);
                    commit('setUser', username);
                    commit('setPassword', password);
                    axios.defaults.headers.common['Authorization'] = `Token ${data.token}`;
                    dispatch('afterLogin');
                    return true;
                } else {
                    return false;
                }
            } catch (e) {
                console.error(e);
                return false;
            }
        },
        async reloadToken({commit, state}) {
            try {
                if (state.password) {
                    const data = await fetch('/api/2/login/', {
                        method: 'POST',
                        headers: {'Content-Type': 'application/json'},
                        body: JSON.stringify({username: state.user, password: state.password}),
                        credentials: 'omit'
                    }).then(r => r.json()).catch(e => console.error(e))
                    if (data && data.token) {
                        commit('setToken', data);
                        axios.defaults.headers.common['Authorization'] = `Token ${data.token}`;
                        return true;
                    }
                }
            } catch (e) {
                console.error(e);
            }
            //credentials failed, logout
            store.commit('logout');
        },
        //async verifyToken({commit, state}) {
        async afterLogin({dispatch}) {
            const boxes = dispatch('loadBoxes');
            const states = dispatch('fetchTicketStates');
            const items = dispatch('loadEventItems');
            const tickets = dispatch('loadTickets');
            const user = dispatch('loadUserInfo');
            await Promise.all([boxes, items, tickets, user, states]);
        },
        async fetchImage({state}, url) {
            return await fetch(url, {headers: {'Authorization': `Token ${state.token}`}});
        },
        async loadUserInfo({commit}) {
            const {data} = await axios.get('/2/self/');
            commit('setUser', data.username);
            commit('setPermissions', data.permissions);
        },
        async loadEvents({commit}) {
            const {data} = await axios.get('/2/events/');
            commit('replaceEvents', data);
        },
        async fetchTicketStates({commit}) {
            const {data} = await axios.get('/2/tickets/states/');
            commit('replaceTicketStates', data);
        },
        changeEvent({dispatch, getters, commit}, eventName) {
            router.push({path: `/${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}) {
            try {
                commit('replaceLoadedItems', []);
                const slug = getters.getEventSlug;
                if (slug in state.itemCache) {
                    commit('replaceLoadedItems', state.itemCache[slug]);
                }
                const {data} = await axios.get(`/2/${slug}/items/`);
                commit('replaceLoadedItems', data);
                commit('setItemCache', {slug, items: data});
            } catch (e) {
                console.error("Error loading items");
            }
        },
        async searchEventItems({commit, getters}, query) {
            const foo = utf8.encode(query);
            const bar = base64.encode(foo);

            const {data} = await axios.get(`/2/${getters.getEventSlug}/items/${bar}/`);
            commit('replaceLoadedItems', data);
        },
        async loadBoxes({commit}) {
            const {data} = await axios.get('/2/boxes/');
            commit('replaceBoxes', data);
        },
        async createBox({commit, dispatch}, box) {
            const {data} = await axios.post('/2/boxes/', box);
            commit('replaceBoxes', data);
            dispatch('loadBoxes').then(() => {
                commit('closeAddBoxModal');
            });
        },
        async deleteBox({commit, dispatch}, box_id) {
            await axios.delete(`/2/boxes/${box_id}/`);
            dispatch('loadBoxes');
        },
        async updateItem({commit, getters}, item) {
            const {data} = await axios.put(`/2/${getters.getEventSlug}/item/${item.uid}/`, item);
            commit('updateItem', data);
        },
        async markItemReturned({commit, getters}, item) {
            await axios.patch(`/2/${getters.getEventSlug}/item/${item.uid}/`, {returned: true});
            commit('removeItem', item);
        },
        async deleteItem({commit, getters}, item) {
            await axios.delete(`/2/${getters.getEventSlug}/item/${item.uid}/`, item);
            commit('removeItem', item);
        },
        async postItem({commit, getters}, item) {
            commit('updateLastUsed', {box: item.box, cid: item.cid});
            const {data} = await axios.post(`/2/${getters.getEventSlug}/item/`, item);
            commit('appendItem', data);
        },
        async loadTickets({commit}) {
            const {data} = await axios.get('/2/tickets/');
            commit('replaceTickets', data);
        },
        async sendMail({commit, dispatch}, {id, message}) {
            const {data} = await axios.post(`/2/tickets/${id}/reply/`, {message});
            await dispatch('loadTickets');
        },
        async postManualTicket({commit, dispatch}, {sender, message, title,}) {
            const {data} = await axios.post(`/2/tickets/manual/`, {
                name: title,
                sender,
                body: message,
                recipient: 'mail@c3lf.de'
            });
            await dispatch('loadTickets');
        },
        async postComment({commit, dispatch}, {id, message}) {
            const {data} = await axios.post(`/2/tickets/${id}/comment/`, {comment: message});
            await dispatch('loadTickets');
        },
        async loadUsers({commit}) {
            const {data} = await axios.get('/2/users/');
            commit('replaceUsers', data);
        },
        async loadGroups({commit}) {
            const {data} = await axios.get('/2/groups/');
            commit('replaceGroups', data);
        },
        async updateTicket({commit}, ticket) {
            const {data} = await axios.put(`/2/tickets/${ticket.id}/`, ticket);
            commit('updateTicket', data);
        },
        async updateTicketPartial({commit}, {id, ...ticket}) {
            const {data} = await axios.patch(`/2/tickets/${id}/`, ticket);
            commit('updateTicket', data);
        }
    },
    plugins: [createMutationsSharer({
        predicate: [
            'replaceLoadedItems',
            'setItemCache',
            'setLayout',
            'replaceBoxes',
            'updateItem',
            'removeItem',
            'appendItem',
            'replaceTickets',
            'replaceUsers',
            'replaceGroups',
            'updateTicket',
            'openAddBoxModal',
            'closeAddBoxModal',
            'createToast',
            'removeToast',
            'setRemember',
            'setUser',
            'setPermissions',
            'setToken',
            'logout',
        ]
    })],
});

export default store;

store.dispatch('loadEvents').then(() => {
    if (store.getters.isLoggedIn) {
        axios.defaults.headers.common['Authorization'] = `Token ${store.state.token}`;
        store.dispatch('afterLogin');
    }
});