// Copyright 2016 Documize Inc. <legal@documize.com>. All rights reserved.
//
// This software (Documize Community Edition) is licensed under
// GNU AGPL v3 http://www.gnu.org/licenses/agpl-3.0.en.html
//
// You can operate outside the AGPL restrictions by purchasing
// Documize Enterprise Edition and obtaining a commercial license
// by contacting <sales@documize.com>.
//
// https://documize.com

import Ember from 'ember';

const {
	inject: { service }
} = Ember;

export default Ember.Service.extend({
	sessionService: service('session'),
	folderService: service('folder'),
	ajax: service(),
	store: service(),

	// Returns document model for specified document id.
	getDocument(documentId) {
		return this.get('ajax').request(`documents/${documentId}`, {
			method: "GET"
		}).then((response) => {
			let data = this.get('store').normalize('document', response);
			return this.get('store').push(data);
		}).catch((error) => {
			this.get('router').transitionTo('/not-found');
			return error;
		});
	},

	// Returns all documents for specified space.
	getAllBySpace(spaceId) {
		return this.get('ajax').request(`documents?space=${spaceId}`, {
			method: "GET"
		}).then((response) => {
			let documents = Ember.ArrayProxy.create({
				content: Ember.A([])
			});

			documents = response.map((doc) => {
				let data = this.get('store').normalize('document', doc);
				return this.get('store').push(data);
			});

			return documents;
		});
	},

	// saveDocument updates an existing document record.
	save(doc) {
		let id = doc.get('id');

		return this.get('ajax').request(`documents/${id}`, {
			method: 'PUT',
			data: JSON.stringify(doc)
		});
	},

	changePageSequence(documentId, payload) {
		let url = `documents/${documentId}/pages/sequence`;

		return this.get('ajax').post(url, {
			data: JSON.stringify(payload),
			contentType: 'json'
		});
	},

	changePageLevel(documentId, payload) {
		let url = `documents/${documentId}/pages/level`;

		return this.get('ajax').post(url, {
			data: JSON.stringify(payload),
			contentType: 'json'
		});
	},

	deleteDocument(documentId) {
		let url = `documents/${documentId}`;

		return this.get('ajax').request(url, {
			method: 'DELETE'
		});
	},

	updatePage(documentId, pageId, payload, skipRevision) {
		var revision = skipRevision ? "?r=true" : "?r=false";
		let url = `documents/${documentId}/pages/${pageId}${revision}`;

		Ember.set(payload.meta, 'id', parseInt(payload.meta.id));

		return this.get('ajax').request(url, {
			method: 'PUT',
			data: JSON.stringify(payload),
			contentType: 'json'
		}).then((response) => {
			let data = this.get('store').normalize('page', response);
			return this.get('store').push(data);
		});
	},

	// addPage inserts new page to an existing document.
	addPage(documentId, payload) {
		let url = `documents/${documentId}/pages`;

		return this.get('ajax').post(url, {
			data: JSON.stringify(payload),
			contentType: 'json'
		});
	},

	// Nukes multiple pages from the document.
	deletePages(documentId, pageId, payload) {
		let url = `documents/${documentId}/pages`;

		return this.get('ajax').request(url, {
			data: JSON.stringify(payload),
			contentType: 'json',
			method: 'DELETE'
		});
	},

	// Nukes a single page from the document.
	deletePage(documentId, pageId) {
		let url = `documents/${documentId}/pages/${pageId}`;

		return this.get('ajax').request(url, {
			method: 'DELETE'
		});
	},

	getDocumentRevisions(documentId) {
		let url = `documents/${documentId}/revisions`;

		return this.get('ajax').request(url, {
			method: "GET"
		});
	},

	getPageRevisions(documentId, pageId) {
		let url = `documents/${documentId}/pages/${pageId}/revisions`;

		return this.get('ajax').request(url, {
			method: "GET"
		});
	},

	getPageRevisionDiff(documentId, pageId, revisionId) {
		let url = `documents/${documentId}/pages/${pageId}/revisions/${revisionId}`;

		return this.get('ajax').request(url, {
			method: "GET",
			dataType: 'text'
		}).then((response) => {
			return response;
		}).catch(() => {
			return "";
		});
	},

	rollbackPage(documentId, pageId, revisionId) {
		let url = `documents/${documentId}/pages/${pageId}/revisions/${revisionId}`;

		return this.get('ajax').request(url, {
			method: "POST"
		});
	},

	// document meta referes to number of views, edits, approvals, etc.
	getActivity(documentId) {
		return this.get('ajax').request(`documents/${documentId}/activity`, {
			method: "GET"
		}).then((response) => {
			let data = [];
			data = response.map((obj) => {
				let data = this.get('store').normalize('documentActivity', obj);
				return this.get('store').push(data);
			});

			return data;
		}).catch(() => {
			return [];
		});
	},

	// Returns all pages without the content
	getTableOfContents(documentId) {

		return this.get('ajax').request(`documents/${documentId}/pages?content=0`, {
			method: 'GET'
		}).then((response) => {
			let data = [];
			data = response.map((obj) => {
				let data = this.get('store').normalize('page', obj);
				return this.get('store').push(data);
			});

			return data;
		});
	},

	// Returns all document pages with content
	getPages(documentId) {
		return this.get('ajax').request(`documents/${documentId}/pages`, {
			method: 'GET'
		}).then((response) => {
			let pages = [];

			pages = response.map((page) => {
				let data = this.get('store').normalize('page', page);
				return this.get('store').push(data);
			});

			return pages;
		});
	},

	// Returns document page with content
	getPage(documentId, pageId) {

		return this.get('ajax').request(`documents/${documentId}/pages/${pageId}`, {
			method: 'GET'
		}).then((response) => {
			let data = this.get('store').normalize('page', response);
			return this.get('store').push(data);
		});
	},

	// Returns document page meta object
	getPageMeta(documentId, pageId) {

		return this.get('ajax').request(`documents/${documentId}/pages/${pageId}/meta`, {
			method: 'GET'
		}).then((response) => {
			let data = this.get('store').normalize('page-meta', response);
			return this.get('store').push(data);
		}).catch(() => {
		});
	},

	// document attachments without the actual content
	getAttachments(documentId) {

		return this.get('ajax').request(`documents/${documentId}/attachments`, {
			method: 'GET'
		}).then((response) => {
			let data = [];

			if (isObject(response)) {
				return data;
			}

			data = response.map((obj) => {
				let data = this.get('store').normalize('attachment', obj);
				return this.get('store').push(data);
			});

			return data;
		});
	},

	// nuke an attachment
	deleteAttachment(documentId, attachmentId) {
		return this.get('ajax').request(`documents/${documentId}/attachments/${attachmentId}`, {
			method: 'DELETE'
		});
	},

	//**************************************************
	// Page Move Copy
	//**************************************************

	// Return list of documents that can accept a page.
	getPageMoveCopyTargets() {
		return this.get('ajax').request(`sections/targets`, {
			method: 'GET'
		}).then((response) => {
			let data = [];

			data = response.map((obj) => {
				let data = this.get('store').normalize('document', obj);
				return this.get('store').push(data);
			});

			return data;
		});
	},

	// Copy existing page to same or different document.
	copyPage(documentId, pageId, targetDocumentId) {
		return this.get('ajax').request(`documents/${documentId}/pages/${pageId}/copy/${targetDocumentId}`, {
			method: 'POST'
		}).then((response) => {
			let data = this.get('store').normalize('page', response);
			return this.get('store').push(data);
		});
	},

	// Move existing page to different document.
	movePage(documentId, pageId, targetDocumentId) {
		return this.get('ajax').request(`documents/${documentId}/pages/${pageId}/move/${targetDocumentId}`, {
			method: 'POST'
		}).then((response) => {
			let data = this.get('store').normalize('page', response);
			return this.get('store').push(data);
		});
	},

	//**************************************************
	// Fetch bulk data
	//**************************************************

	// fetchXXX represents UI specific bulk data loading designed to
	// reduce network traffic and boost app performance.
	// This method that returns:
	// 1. getUserVisible()
	// 2. getSummary()
	// 3. getSpaceCategoryMembership()
	fetchDocumentData(documentId) {
		return this.get('ajax').request(`fetch/document/${documentId}`, {
			method: 'GET'
		}).then((response) => {
			let data = {
				document: {},
				permissions: {},
				folders: [],
				folder: {},
				links: [],
			};

			let doc = this.get('store').normalize('document', response.document);
			doc = this.get('store').push(doc);

			let perms = this.get('store').normalize('space-permission', response);
			perms= this.get('store').push(perms);
			this.get('folderService').set('permissions', perms);

			let folders = response.folders.map((obj) => {
				let data = this.get('store').normalize('folder', obj);
				return this.get('store').push(data);
			});

			data.document = doc;
			data.permissions = perms;
			data.folders = folders;
			data.folder = folders.findBy('id', doc.get('folderId'));
			data.links = response.links;

			return data;
		});

	}
});

function isObject(a) {
	return (!!a) && (a.constructor === Object);
}