/**
 * ChinaLocations For WeApp
 * @author Tevin
 */

import Taro from '@tarojs/taro';
import project from '@project';
import { $hostBoot } from '@components/bases/HostBoot';
import { Tools } from '@components/common/Tools';

let locationTreeLv3 = [];
let locationTreeLv4 = [];
let locationRes = {};
let readyCallbacks = [];

Taro.request({
    url: $hostBoot.getHost() + project.host.assetsPath + '/datas/ChinaLocations.lv4.min.json',
    header: {
        'X-Requested-With': 'XMLHttpRequest',
        'Content-Type': 'application/x-www-form-urlencoded;charset=UTF-8',
        'Ax-Rq-Type': 'separation',
    },
    credentials: 'same-origin',
    dataType: 'json',
    timeout: 30 * 1000,
    method: 'GET',
    success: response => {
        locationRes = response.data;
        readyCallbacks.forEach(callback => callback());
    }
});

export class ChinaLocations {

    onReady(callback) {
        if (Tools.isEmptyObject(locationRes)) {
            readyCallbacks.push(callback);
        } else {
            callback();
        }
    }

    _createLocationTree(level) {
        const treeDatas = [];
        // lv1-省
        Object.keys(locationRes).forEach((provinceCode) => {
            const province = {
                label: locationRes[provinceCode].name,
                value: provinceCode,
                children: [],
            };
            // lv2-市
            const cityContainer = locationRes[provinceCode].children;
            Object.keys(cityContainer).forEach((cityCode) => {
                const city = {
                    value: cityCode,
                    area: cityContainer[cityCode].area,  // 电话区码
                    children: [],
                };
                if (typeof cityContainer[cityCode] === 'string') {
                    city.label = cityContainer[cityCode];
                } else {
                    city.label = cityContainer[cityCode].name;
                    // lv3-区
                    const distContainer = cityContainer[cityCode].children || {};
                    Object.keys(distContainer).forEach(distCode => {
                        const dist = {
                            value: distCode,
                        };
                        if (typeof distContainer[distCode] === 'string') {
                            dist.label = distContainer[distCode];
                        } else {
                            dist.label = distContainer[distCode].name;
                            // lv4-街
                            if (level === 4) {
                                dist.children = [];
                                const streetContainer = distContainer[distCode].children || {};
                                Object.keys(streetContainer).forEach(streetCode => {
                                    const street = {
                                        label: streetContainer[streetCode],
                                        value: streetCode,
                                    };
                                    dist.children.push(street);
                                });
                                if (dist.children.length > 0) {
                                    dist.children.unshift({
                                        label: '( 不选 )',
                                        value: '',
                                    });
                                }
                            }
                        }
                        city.children.push(dist);
                    });
                }
                province.children.push(city);
            });
            treeDatas.push(province);
        });
        return treeDatas;
    }

    getLocationTree(level, callback) {
        this.onReady(() => {
            if (level === 3) {
                if (locationTreeLv3.length === 0) {
                    locationTreeLv3 = this._createLocationTree(3);
                }
                callback(locationTreeLv3);
            } else if (level === 4) {
                if (locationTreeLv4.length === 0) {
                    locationTreeLv4 = this._createLocationTree(4);
                }
                callback(locationTreeLv4);
            }
        });
    }

    // 获取省市区拼合文本
    getRegionText(regions, callback) {
        this.getRegionNames(regions, address => {
            callback(address.join(''));
        });
    }

    // 省市区名称
    getRegionNames(regions, callback) {
        this.onReady(() => {
            if (typeof regions === 'string') {
                regions = regions.split(',');
            }
            if (!regions || regions.length === 0 || !regions[0]) {
                callback([]);
            }
            let address = [];
            let tempLocationData = locationRes;
            regions.forEach((code) => {
                if (!code || !tempLocationData[code]) {
                    address.push('');
                    tempLocationData = [];
                } else {
                    if (typeof tempLocationData[code].name === 'string') {
                        address.push(tempLocationData[code].name);
                    } else {
                        address.push(tempLocationData[code]);
                    }
                    tempLocationData = tempLocationData[code].children;
                }
            });
            callback(address);
        });
    }

    // 省市区文本转code
    getRegionCodes(regions, callback) {
        this.onReady(() => {
            if (typeof regions === 'string') {
                regions = regions.split(',');
            }
            if (!regions || regions.length === 0 || !regions[0]) {
                callback([]);
            }
            const codes = [];
            // 省
            for (let provinceCode in locationRes) {
                if (locationRes.hasOwnProperty(provinceCode)) {
                    if (locationRes[provinceCode].name === regions[0]) {
                        codes[0] = provinceCode;
                        // 市
                        const provinceContainer = locationRes[provinceCode].children;
                        for (let cityCode in provinceContainer) {
                            if (provinceContainer.hasOwnProperty(cityCode)) {
                                if (provinceContainer[cityCode].name === regions[1]) {
                                    codes[1] = cityCode;
                                    // 区
                                    const distContainer = provinceContainer[cityCode].children;
                                    for (let distCode in distContainer) {
                                        if (distContainer.hasOwnProperty(distCode)) {
                                            if (distContainer[distCode] === regions[2]) {
                                                codes[2] = distCode;
                                                break;
                                            }
                                            if (distContainer[distCode].name === regions[2]) {
                                                codes[2] = distCode;
                                                // 如果存在街道，继续转街道
                                                if (regions[3]) {
                                                    const streetContainer = distContainer[distCode].children;
                                                    Object.keys(streetContainer).forEach(streetCode => {
                                                        if (streetContainer[streetCode] === regions[3]) {
                                                            codes[3] = streetCode;
                                                        }
                                                    });
                                                }
                                                break;
                                            }
                                        }
                                    }
                                    break;
                                }
                            }
                        }
                        break;
                    }
                }
            }
            callback(codes);
        });
    }

    // 电话区码
    getRegionsArea(regions, callback) {
        this.onReady(() => {
            if (typeof regions === 'string') {
                regions = regions.split(',');
            }
            if (!regions || regions.length === 0 || !regions[0]) {
                callback('');
            }
            let area = '';
            // 省
            for (let provinceCode in locationRes) {
                if (locationRes.hasOwnProperty(provinceCode)) {
                    if (provinceCode === regions[0]) {
                        // 市
                        const provinceChildren = locationRes[provinceCode].children;
                        for (let cityCode in provinceChildren) {
                            if (provinceChildren.hasOwnProperty(cityCode)) {
                                if (cityCode === regions[1]) {
                                    area = provinceChildren[cityCode].area;
                                    break;
                                }
                            }
                        }
                        break;
                    }
                }
            }
            callback(area);
        });
    }
};

export const $locations = new ChinaLocations();