//-- copyright
// OpenProject is a project management system.
// Copyright (C) 2012-2017 the OpenProject Foundation (OPF)
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License version 3.
//
// OpenProject is a fork of ChiliProject, which is a fork of Redmine. The copyright follows:
// Copyright (C) 2006-2017 Jean-Philippe Lang
// Copyright (C) 2010-2013 the ChiliProject Team
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
//
// See doc/COPYRIGHT.rdoc for more details.
//++

import {QuerySortByResource} from "../api/api-v3/hal-resources/query-sort-by-resource.service";
import {QueryResource} from "../api/api-v3/hal-resources/query-resource.service";

export class UrlParamsHelperService {

  public constructor(public PaginationService:any) {

  }

  // copied more or less from angular buildUrl
  public buildQueryString(params:any) {
    if (!params) return;

    var parts:string[] = [];
    angular.forEach(params, function (value, key) {
      if (!value) return;
      if (!Array.isArray(value)) value = [value];

      angular.forEach(value, function (v) {
        if (v !== null && typeof v === 'object') {
          v = JSON.stringify(v);
        }
        parts.push(encodeURIComponent(key) + '=' +
          encodeURIComponent(v));
      });
    });

    return parts.join('&');
  }

  public encodeQueryJsonParams(query:QueryResource, additional:any) {
    var paramsData:any = {
      c: query.columns.map(function (column) {
        return column.id;
      })
    };
    if (!!query.sums) {
      paramsData.s = query.sums;
    }

    if (!!query.timelineVisible) {
      paramsData.tv = query.timelineVisible;
    }

    paramsData.tzl = query.timelineZoomLevel;
    paramsData.hi = !!query.showHierarchies;

    if (query.groupBy) {
      paramsData.g = query.groupBy.id;
    }
    if (query.sortBy) {
      paramsData.t = query
        .sortBy
        .map(function (sort:QuerySortByResource) {
          return sort.id.replace('-', ':')
        })
        .join();
    }
    if (query.filters && query.filters.length) {
      paramsData.f = query
        .filters
        .map((filter:any) => {
          var id = filter.id;

          var operator = filter.operator.id;

          return {
            n: id,
            o: encodeURIComponent(operator),
            v: _.map(filter.values, (v) => this.queryFilterValueToParam(v))
          };
        });
    } else {
      paramsData.f = [];
    }

    paramsData.pa = additional.page;
    paramsData.pp = additional.perPage;

    return JSON.stringify(paramsData);
  }

  public buildV3GetQueryFromJsonParams(updateJson:any) {
    var queryData:any = {
      pageSize: this.PaginationService.getPerPage()
    }

    if (!updateJson) {
      return queryData;
    }

    var properties = JSON.parse(updateJson);

    if (properties.c) {
      queryData["columns[]"] = properties.c.map((column:any) => column);
    }
    if (!!properties.s) {
      queryData.showSums = properties.s;
    }
    if (!!properties.tv) {
      queryData.timelineVisible = properties.tv;
    }

    if (properties.tzl) {
      queryData.timelineZoomLevel = properties.tzl;
    }

    if (properties.hi === false || properties.hi === true) {
      queryData.showHierarchies = properties.hi;
    }

    if (properties.g) {
      queryData.groupBy = properties.g;
    }

    // Filters
    if (properties.f) {
      var filters = properties.f.map(function (urlFilter:any) {
        var attributes = {
          operator: decodeURIComponent(urlFilter.o)
        }
        if (urlFilter.v) {
          // the array check is only there for backwards compatibility reasons.
          // Nowadays, it will always be an array;
          var vs = Array.isArray(urlFilter.v) ? urlFilter.v : [urlFilter.v];
          angular.extend(attributes, {values: vs});
        }
        const filterData:any = {};
        filterData[urlFilter.n] = attributes;

        return filterData;
      });

      queryData.filters = JSON.stringify(filters);
    }

    // Sortation
    if (properties.t) {
      queryData.sortBy = JSON.stringify(properties.t.split(',').map((sort:any) => sort.split(':')));
    }

    // Pagination
    if (properties.pa) {
      queryData.offset = properties.pa;
    }
    if (properties.pp) {
      queryData.pageSize = properties.pp;
    }

    return queryData;
  }

  public buildV3GetQueryFromQueryResource(query:QueryResource, additionalParams:any) {
    var queryData:any = {};

    queryData["columns[]"] = query.columns.map((column:any) => column.id);

    queryData.showSums = query.sums;
    queryData.timelineVisible = query.timelineVisible;
    queryData.timelineZoomLevel = query.timelineZoomLevel;
    queryData.showHierarchies = query.showHierarchies;

    if (query.groupBy) {
      queryData.groupBy = query.groupBy.id;
    }

    // Filters
    const filters = query.filters.map((filter:any) => {
      let id = filter.filter.$href;
      id = id.substring(id.lastIndexOf('/') + 1, id.length);

      const operator = filter.operator.id;
      const values = _.map(filter.values, (v) => this.queryFilterValueToParam(v));
      const filterHash:any = {};
      filterHash[id] = {operator: operator, values: values};

      return filterHash;
    });

    queryData.filters = JSON.stringify(filters);

    // Sortation
    queryData.sortBy = JSON.stringify(query
      .sortBy
      .map(function (sort:QuerySortByResource) {
        return sort.id.split('-')
      }));

    return angular.extend(queryData, additionalParams);
  }

  public queryFilterValueToParam(value:any) {
    if (typeof(value) === 'boolean') {
      return value ? 't' : 'f';
    }

    if (!value) {
      return '';
    } else if (value.id) {
      return value.id.toString();
    } else if (value.$href && value.$href.match(/^\/api\/v3\/string_objects/i)) {
      return value.$href.match(/value=([^&]+)/)[1].toString();
    } else if (value.$href) {
      return value.$href.split('/').pop().toString();
    } else {
      return value.toString();
    }
  }
}

angular.module('openproject.helpers')
  .service('UrlParamsHelper', UrlParamsHelperService);