/* Copyright© 2000 - 2022 SuperMap Software Co.Ltd. All rights reserved.
 * This program are made available under the terms of the Apache License, Version 2.0
 * which accompanies this distribution and is available at http://www.apache.org/licenses/LICENSE-2.0.html.*/

import { FetchRequest } from "../../util/FetchRequest";
import { GetFeaturesBySQLParameters } from "../../iServer/GetFeaturesBySQLParameters";
import { FilterParameter } from "../../iServer/FilterParameter";
import { GetFeaturesBySQLService } from "../../iServer/GetFeaturesBySQLService";
import { QueryBySQLParameters } from "../../iServer/QueryBySQLParameters";
import { QueryBySQLService } from "../../iServer/QueryBySQLService";
import { DataFormat,QueryOption } from "../../REST";
import { Lang } from "../../lang/Lang";
import { FileReaderUtil } from "../util/FileReaderUtil";
import { Events } from "../../commontypes/Events";
/**
 * @class ChartModel
 * @classdesc 图表组件数据模型
 * @private
 * @param {Object} datasets - 数据来源。
 * @category Components Chart
 * @fires ChartModel#getdatafailed
 */

export class ChartModel {
    constructor(datasets) {
        this.datasets = datasets;
        this.EVENT_TYPES = ['getdatafailed'];
        this.events = new Events(this, null, this.EVENT_TYPES);
    }
    /**
     * @private
     * @function ChartModel.prototype.getDatasetInfo
     * @description 获得数据集数据。
     * @param {string} datasetUrl - 数据集资源地址。
     */
    getDatasetInfo(success) {
        let datasetUrl = this.datasets.url;
        let me = this;
        FetchRequest.get(datasetUrl)
            .then(function (response) {
                return response.json();
            })
            .then(function (results) {
                if (results.datasetInfo) {
                    let datasetInfo = results.datasetInfo;
                    me.datasetsInfo = {
                        dataSourceName: datasetInfo.dataSourceName,
                        datasetName: datasetInfo.name,
                        mapName: results.name
                    };
                    success({
                        result: me.datasetsInfo
                    });
                }
            })
            .catch(function (error) {
                console.log(error);
                me._fireFailedEvent(error);
            });
    }

    /**
     * @private
     * @function ChartModel.prototype.getDataFeatures
     * @description 请求数据集的数据信息
     * @param {Object} results - 数据集信息。
     * @param {function} success - 成功回调函数。
     */
    getDataFeatures(results, success) {
        let datasetsInfo = results.result;
        let getFeatureParam, getFeatureBySQLParams, getFeatureBySQLService;
        let params = {
            name: datasetsInfo.datasetName + '@' + datasetsInfo.dataSourceName
        };
        Object.assign(params, this.datasets.queryInfo);
        getFeatureParam = new FilterParameter(params);
        getFeatureBySQLParams = new GetFeaturesBySQLParameters({
            queryParameter: getFeatureParam,
            datasetNames: [datasetsInfo.dataSourceName + ':' + datasetsInfo.datasetName],
            fromIndex: 0,
            toIndex: 100000
        });
        getFeatureBySQLService = new GetFeaturesBySQLService(datasetsInfo.dataUrl, {
            eventListeners: {
                processCompleted: success,
                processFailed: function () {}
            }
        });
        getFeatureBySQLService.processAsync(getFeatureBySQLParams);
    }

    /**
     * @private
     * @function ChartModel.prototype.getLayerFeatures
     * @description 请求图层要素的数据信息
     * @param {Object} results - 数据集信息。
     * @param {Callbacks} success - 成功回调函数。
     */
    getLayerFeatures(results, success) {
        let datasetsInfo = results.result;
        let queryParam, queryBySQLParams, queryBySQLService;
        let params = {
            name: datasetsInfo.mapName
        };
        Object.assign(params, this.datasets.queryInfo);
        queryParam = new FilterParameter(params);
        queryBySQLParams = new QueryBySQLParameters({
            queryParams: [queryParam],
            expectCount: 100000
        });
        queryBySQLService = new QueryBySQLService(datasetsInfo.dataUrl, {
            eventListeners: {
                processCompleted: success,
                processFailed: function () {}
            }
        });
        queryBySQLService.processAsync(queryBySQLParams);
    }

    /**
     * @private
     * @function ChartModel.prototype.getDataInfoByIptl
     * @description 用dataId获取iportal的数据。
     * @param {Callbacks} success - 成功回调函数。
     *
     */
    getDataInfoByIptl(success) {
        // success是chart的回调
        this.getServiceInfo(this.datasets.url, success);
    }

    /**
     * @private
     * @function ChartModel.prototype.getServiceInfo
     * @description 用iportal获取dataItemServices。
     * @param {string} url
     * @param {Callbacks} success - 成功回调函数。
     * */
    getServiceInfo(url, success) {
        let me = this;
        FetchRequest.get(url, null, {
            withCredentials: this.datasets.withCredentials
        })
            .then((response) => {
                return response.json();
            })
            .then((data) => {
                if (data.succeed === false) {
                    //请求失败
                    me._fireFailedEvent(data);
                    return;
                }
                // 是否有rest服务
                if (data.dataItemServices && data.dataItemServices.length > 0) {
                    let dataItemServices = data.dataItemServices,
                        resultData;

                    dataItemServices.forEach((item) => {
                        // 如果有restdata并且发布成功，就请求restdata服务
                        // 如果有restmap并且发布成功，就请求restmap服务
                        // 其他情况就请求iportal/content.json
                        if (item.serviceType === 'RESTDATA' && item.serviceStatus === 'PUBLISHED') {
                            resultData = item;
                        } else if (item.serviceType === 'RESTMAP' && item.serviceStatus === 'PUBLISHED') {
                            resultData = item;
                        } else {
                            me.getDatafromContent(url, success);
                            return;
                        }
                    });
                    // 如果有服务，获取数据源和数据集, 然后请求rest服务
                    resultData && me.getDatafromRest(resultData.serviceType, resultData.address, success);
                } else {
                    me.getDatafromContent(url, success);
                    return;
                }
            })
            .catch((error) => {
                console.log(error);
                me._fireFailedEvent(error);
            });
    }
    /**
     * @private
     * @function ChartModel.prototype.getDatafromURL
     * @description 用iportal获取数据。（通过固定的url来请求，但是不能请求工作空间的数据）
     * @param {string} url
     * @param {Callbacks} success - 成功回调函数。
     */
    getDatafromContent(url, success) {
        // 成功回调传入的results
        let results = {
                result: {}
            },
            me = this;
        url += '/content.json?pageSize=9999999&currentPage=1';
        // 获取图层数据
        FetchRequest.get(url, null, {
            withCredentials: this.datasets.withCredentials
        })
            .then((response) => {
                return response.json();
            })
            .then((data) => {
                if (data.succeed === false) {
                    //请求失败
                    me._fireFailedEvent(data);
                    return;
                }
                if (data.type) {
                    if (data.type === 'JSON' || data.type === 'GEOJSON') {
                        // 将字符串转换成json
                        data.content = JSON.parse(data.content.trim());
                        // 如果是json文件 data.content = {type:'fco', features},格式不固定
                        if (!data.content.features) {
                            //json格式解析失败
                            console.log(Lang.i18n('msg_jsonResolveFiled'));
                            return;
                        }
                        let features = this._formatGeoJSON(data.content);
                        results.result.features = {
                            type: data.content.type,
                            features
                        };
                    } else if (data.type === 'EXCEL' || data.type === 'CSV') {
                        let features = this._excelData2Feature(data.content);
                        results.result.features = {
                            type: 'FeatureCollection',
                            features
                        };
                    }
                    success(results, 'content');
                }
            }, this)
            .catch((error) => {
                console.log(error);
                me._fireFailedEvent(error);
            });
    }

    /**
     * @private
     * @function ChartModel.prototype._getDataSource
     * @description 获取数据源名和数据集名。
     * @param {string} serviceType 服务类型
     * @param {string} address 地址
     * @param {Callbacks} success - 成功回调函数。
     * @return {Array.<string>} ["数据源名:数据集名"]
     * @return {string} 图层名
     */
    getDatafromRest(serviceType, address, success) {
        let me = this,
            withCredentials = this.datasets.withCredentials;
        if (serviceType === 'RESTDATA') {
            let url = `${address}/data/datasources`,
                sourceName,
                datasetName;
            // 请求获取数据源名
            FetchRequest.get(url, null, {
                withCredentials
            })
                .then((response) => {
                    return response.json();
                })
                .then((data) => {
                    sourceName = data.datasourceNames[0];
                    url = `${address}/data/datasources/${sourceName}/datasets`;
                    // 请求获取数据集名
                    FetchRequest.get(url, null, {
                        withCredentials
                    })
                        .then((response) => {
                            return response.json();
                        })
                        .then((data) => {
                            datasetName = data.datasetNames[0];
                            // 请求restdata服务
                            me.getDatafromRestData(`${address}/data`, [sourceName + ':' + datasetName], success);
                            return [sourceName + ':' + datasetName];
                        })
                        .catch(function (error) {
                            me._fireFailedEvent(error);
                        });
                })
                .catch(function (error) {
                    me._fireFailedEvent(error);
                });
        } else {
            // 如果是地图服务
            let url = `${address}/maps`,
                mapName,
                layerName,
                path;
            // 请求获取地图名
            FetchRequest.get(url, null, {
                withCredentials
            })
                .then((response) => {
                    return response.json();
                })
                .then((data) => {
                    mapName = data[0].name;
                    path = data[0].path;
                    url = url = `${address}/maps/${mapName}/layers`;
                    // 请求获取图层名
                    FetchRequest.get(url, null, {
                        withCredentials
                    })
                        .then((response) => {
                            return response.json();
                        })
                        .then((data) => {
                            layerName = data[0].subLayers.layers[0].caption;
                            // 请求restmap服务
                            me.getDatafromRestMap(layerName, path, success);
                            return layerName;
                        })
                        .catch(function (error) {
                            me._fireFailedEvent(error);
                        });
                })
                .catch(function (error) {
                    me._fireFailedEvent(error);
                });
        }
    }

    /**
     * @private
     * @function ChartModel.prototype.getDatafromRestData
     * @description 请求restdata服务
     * @param {string} url
     * @param {Array<string>} dataSource [数据源名:数据集名]
     * @param {Callbacks} success - 成功回调函数。
     */
    getDatafromRestData(url, dataSource, success) {
        let me = this;
        this.datasets.queryInfo.attributeFilter = this.datasets.queryInfo.attributeFilter || 'SmID>0';
        this._getFeatureBySQL(
            url,
            dataSource,
            this.datasets.queryInfo,
            (results) => {
                // 此时的features已经处理成geojson了
                success(results, 'RESTDATA');
            },
            (error) => {
                console.log(error);
                me._fireFailedEvent(error);
            }
        );
    }

    /**
     * @private
     * @function ChartModel.prototype.getDatafromRestMap
     * @description 请求restmap服务
     * @param {string} dataSource layerName
     * @param {string} path - map服务地址。
     * @param {Callbacks} success - 成功回调函数。
     */
    getDatafromRestMap(dataSource, path, success) {
        let me = this;
        this.datasets.queryInfo.attributeFilter = this.datasets.queryInfo.attributeFilter || 'smid=1';
        this._queryFeatureBySQL(
            path,
            dataSource,
            this.datasets.queryInfo,
            null,
            null,
            (results) => {
                // let features = result.result.recordsets[0].features;
                success(results, 'RESTMAP');
            },
            (error) => {
                console.log(error);
                me._fireFailedEvent(error);
            }
        );
    }

    /**
     * @private
     * @function ChartModel.prototype._getFeatureBySQL
     * @description 通过 sql 方式查询数据。
     */
    _getFeatureBySQL(url, datasetNames, queryInfo, processCompleted, processFaild) {
        let getFeatureParam, getFeatureBySQLService, getFeatureBySQLParams;
        let params = {
            name: datasetNames.join().replace(':', '@')
        };
        Object.assign(params, queryInfo);
        getFeatureParam = new FilterParameter(params);
        getFeatureBySQLParams = new GetFeaturesBySQLParameters({
            queryParameter: getFeatureParam,
            datasetNames: datasetNames,
            fromIndex: 0,
            toIndex: 100000,
            returnContent: true
        });
        let options = {
            eventListeners: {
                processCompleted: (getFeaturesEventArgs) => {
                    processCompleted && processCompleted(getFeaturesEventArgs);
                },
                processFailed: (e) => {
                    processFaild && processFaild(e);
                }
            }
        };
        getFeatureBySQLService = new GetFeaturesBySQLService(url, options);
        getFeatureBySQLService.processAsync(getFeatureBySQLParams);
    }

    /**
     * @private
     * @function ChartModel.prototype._queryFeatureBySQL
     * @description 通过 sql 方式查询数据。
     */
    _queryFeatureBySQL(
        url,
        layerName,
        queryInfo,
        fields,
        epsgCode,
        processCompleted,
        processFaild,
        startRecord,
        recordLength,
        onlyAttribute
    ) {
        var queryParam, queryBySQLParams;
        var filterParams = {
            name: layerName
        };
        Object.assign(filterParams, queryInfo);
        queryParam = new FilterParameter(filterParams);
        if (fields) {
            queryParam.fields = fields;
        }
        var params = {
            queryParams: [queryParam]
        };
        if (onlyAttribute) {
            params.queryOption = QueryOption.ATTRIBUTE;
        }
        startRecord && (params.startRecord = startRecord);
        recordLength && (params.expectCount = recordLength);
        if (epsgCode) {
            params.prjCoordSys = {
                epsgCode: epsgCode
            };
        }
        queryBySQLParams = new QueryBySQLParameters(params);
        this._queryBySQL(url, queryBySQLParams, (data) => {
            data.type === 'processCompleted' ? processCompleted(data) : processFaild(data);
        });
    }
    /**
     * @function ChartModel.prototype._queryBySQL
     * @description  SQL 查询服务。
     * @param {QueryBySQLParameters} params - SQL 查询相关参数类。
     * @param {RequestCallback} callback - 回调函数。
     * @param {DataFormat} [resultFormat=DataFormat.GEOJSON] - 结果类型。
     */
    _queryBySQL(url, params, callback, resultFormat) {
        var me = this;
        var queryBySQLService = new QueryBySQLService(url, {
            eventListeners: {
                scope: me,
                processCompleted: callback,
                processFailed: callback
            },
            format: me._processFormat(resultFormat)
        });

        queryBySQLService.processAsync(params);
    }
    /**
     * @function ChartModel.prototype._processFormat
     * @description 将数据转换成geojson。
     * @param {Object} resultFormat - 返回结果集。
     * @return {Object} [resultFormat=DataFormat.GEOJSON] - 结果类型。
     */
    _processFormat(resultFormat) {
        return resultFormat ? resultFormat : DataFormat.GEOJSON;
    }

    /**
     * @private
     * @function ChartModel.prototype._formatGeoJSON
     * @description 格式 GeoJSON。
     * @param {GeoJSON} data - GeoJSON 数据。
     */
    _formatGeoJSON(data) {
        let features = data.features;
        features.forEach((row, index) => {
            row.properties['index'] = index;
        });
        return features;
    }

    /**
     * @private
     * @description 将 csv 和 xls 文件内容转换成 geojson
     * @function ChartModel.prototype._excelData2Feature
     * @param content  文件内容
     * @param layerInfo  图层信息
     * @returns {Array}  feature的数组集合
     */
    _excelData2Feature(dataContent) {
        let fieldCaptions = dataContent.colTitles;
        //位置属性处理
        let xfieldIndex = -1,
            yfieldIndex = -1;
        for (let i = 0, len = fieldCaptions.length; i < len; i++) {
            if (FileReaderUtil.isXField(fieldCaptions[i])) {
                xfieldIndex = i;
            }
            if (FileReaderUtil.isYField(fieldCaptions[i])) {
                yfieldIndex = i;
            }
        }

        // feature 构建后期支持坐标系 4326/3857
        let features = [];

        for (let i = 0, len = dataContent.rows.length; i < len; i++) {
            let row = dataContent.rows[i];

            let x = Number(row[xfieldIndex]),
                y = Number(row[yfieldIndex]);
            //属性信息
            let attributes = {};
            for (let index in dataContent.colTitles) {
                let key = dataContent.colTitles[index];
                attributes[key] = dataContent.rows[i][index];
            }
            attributes['index'] = i + '';
            //目前csv 只支持处理点，所以先生成点类型的 geojson
            let feature = {
                type: 'Feature',
                geometry: {
                    type: 'Point',
                    coordinates: [x, y]
                },
                properties: attributes
            };
            features.push(feature);
        }
        return features;
    }
    /**
     * @private
     * @description 请求数据失败的事件
     * @function ChartModel.prototype._fireFailedEvent
     * @param {Object} error  错误信息
     */
    _fireFailedEvent(error) {
        let errorData = error
            ? {
                  error,
                  message: Lang.i18n('msg_getdatafailed')
              }
            : {
                  message: Lang.i18n('msg_getdatafailed')
              };
        /**
         * @event ChartModel#getdatafailed
         * @description 监听到获取数据失败事件后触发
         * @property {Object} error  - 事件对象。
         */
        this.events.triggerEvent('getdatafailed', errorData);
    }
}
