import {
	IExecuteFunctions,
} from 'n8n-core';

import {
	IDataObject,
	ILoadOptionsFunctions,
	INodeExecutionData,
	INodePropertyOptions,
	INodeType,
	INodeTypeDescription,
	NodeOperationError,
} from 'n8n-workflow';

import {
	ghostApiRequest,
	ghostApiRequestAllItems,
	validateJSON,
} from './GenericFunctions';

import {
	postFields,
	postOperations,
} from './PostDescription';

import * as moment from 'moment-timezone';

export class Ghost implements INodeType {
	description: INodeTypeDescription = {
		displayName: 'Ghost',
		name: 'ghost',
		icon: 'file:ghost.png',
		group: ['input'],
		version: 1,
		subtitle: '={{$parameter["operation"] + ": " + $parameter["resource"]}}',
		description: 'Consume Ghost API.',
		defaults: {
			name: 'Ghost',
			color: '#15212a',
		},
		inputs: ['main'],
		outputs: ['main'],
		credentials: [
			{
				name: 'ghostAdminApi',
				required: true,
				displayOptions: {
					show: {
						source: [
							'adminApi',
						],
					},
				},
			},
			{
				name: 'ghostContentApi',
				required: true,
				displayOptions: {
					show: {
						source: [
							'contentApi',
						],
					},
				},
			},
		],
		properties: [
			{
				displayName: 'Source',
				name: 'source',
				type: 'options',
				description: 'Pick where your data comes from, Content or Admin API',
				options: [
					{
						name: 'Admin API',
						value: 'adminApi',
					},
					{
						name: 'Content API',
						value: 'contentApi',
					},
				],
				default: 'contentApi',
			},
			{
				displayName: 'Resource',
				name: 'resource',
				type: 'options',
				options: [
					{
						name: 'Post',
						value: 'post',
					},
				],
				default: 'post',
				description: 'The resource to operate on.',
			},
			...postOperations,
			...postFields,
		],
	};


	methods = {
		loadOptions: {
			// Get all the authors to display them to user so that he can
			// select them easily
			async getAuthors(
				this: ILoadOptionsFunctions,
			): Promise<INodePropertyOptions[]> {
				const returnData: INodePropertyOptions[] = [];
				const users = await ghostApiRequestAllItems.call(
					this,
					'users',
					'GET',
					`/admin/users`,
				);
				for (const user of users) {
					returnData.push({
						name: user.name,
						value: user.id,
					});
				}
				return returnData;
			},
			// Get all the tags to display them to user so that he can
			// select them easily
			async getTags(
				this: ILoadOptionsFunctions,
			): Promise<INodePropertyOptions[]> {
				const returnData: INodePropertyOptions[] = [];
				const tags = await ghostApiRequestAllItems.call(
					this,
					'tags',
					'GET',
					`/admin/tags`,
				);
				for (const tag of tags) {
					returnData.push({
						name: tag.name,
						value: tag.id,
					});
				}
				return returnData;
			},
		},
	};

	async execute(this: IExecuteFunctions): Promise<INodeExecutionData[][]> {
		const items = this.getInputData();
		const returnData: IDataObject[] = [];
		const length = (items.length as unknown) as number;
		const timezone = this.getTimezone();
		const qs: IDataObject = {};
		let responseData;
		const resource = this.getNodeParameter('resource', 0) as string;
		const operation = this.getNodeParameter('operation', 0) as string;
		const source = this.getNodeParameter('source', 0) as string;

		if (source === 'contentApi') {
			if (resource === 'post') {
				if (operation === 'get') {
					for (let i = 0; i < items.length; i++) {
						const by = this.getNodeParameter('by', i) as string;

						const identifier = this.getNodeParameter('identifier', i) as string;

						const options = this.getNodeParameter('options', i) as IDataObject;

						Object.assign(qs, options);

						let endpoint;

						if (by === 'slug') {
							endpoint = `/content/posts/slug/${identifier}`;
						} else {
							endpoint = `/content/posts/${identifier}`;
						}
						responseData = await ghostApiRequest.call(this, 'GET', endpoint, {}, qs);

						returnData.push.apply(returnData, responseData.posts);
					}
				}

				if (operation === 'getAll') {
					for (let i = 0; i < items.length; i++) {

						const returnAll = this.getNodeParameter('returnAll', 0) as boolean;

						const options = this.getNodeParameter('options', i) as IDataObject;

						Object.assign(qs, options);

						if (returnAll) {
							responseData = await ghostApiRequestAllItems.call(this, 'posts', 'GET', '/content/posts', {} ,qs);
						} else {
							qs.limit = this.getNodeParameter('limit', 0);
							responseData = await ghostApiRequest.call(this, 'GET', '/content/posts', {}, qs);
							responseData = responseData.posts;
						}

						returnData.push.apply(returnData, responseData);
					}
				}
			}
		}

		if (source === 'adminApi') {
			if (resource === 'post') {
				if (operation === 'create') {
					for (let i = 0; i < length; i++) {
						const title = this.getNodeParameter('title', i) as string;

						const contentFormat = this.getNodeParameter('contentFormat', i) as string;

						const content = this.getNodeParameter('content', i) as string;

						const additionalFields = this.getNodeParameter('additionalFields', i) as IDataObject;

						const post: IDataObject = {
							title,
						};

						if (contentFormat === 'html') {
							post.html = content;
							qs.source = 'html';
						} else {
							const mobileDoc = validateJSON(content);
							if (mobileDoc === undefined) {
								throw new NodeOperationError(this.getNode(), 'Content must be a valid JSON');
							}
							post.mobiledoc = content;
						}

						delete post.content;

						Object.assign(post, additionalFields);

						if (post.published_at) {
							post.published_at = moment.tz(post.published_at, timezone).utc().format();
						}

						if (post.status === 'scheduled' && post.published_at === undefined) {
							throw new NodeOperationError(this.getNode(), 'Published at must be define when status is scheduled');
						}

						responseData = await ghostApiRequest.call(this, 'POST', '/admin/posts', { posts: [post] }, qs);

						returnData.push.apply(returnData, responseData.posts);
					}
				}

				if (operation === 'delete') {
					for (let i = 0; i < length; i++) {
						const postId = this.getNodeParameter('postId', i) as string;

						responseData = await ghostApiRequest.call(this, 'DELETE', `/admin/posts/${postId}`);

						returnData.push({ success: true });
					}
				}

				if (operation === 'get') {
					for (let i = 0; i < length; i++) {
						const by = this.getNodeParameter('by', i) as string;

						const identifier = this.getNodeParameter('identifier', i) as string;

						const options = this.getNodeParameter('options', i) as IDataObject;

						Object.assign(qs, options);

						let endpoint;

						if (by === 'slug') {
							endpoint = `/admin/posts/slug/${identifier}`;
						} else {
							endpoint = `/admin/posts/${identifier}`;
						}
						responseData = await ghostApiRequest.call(this, 'GET', endpoint, {}, qs);

						returnData.push.apply(returnData, responseData.posts);
					}
				}

				if (operation === 'getAll') {
					for (let i = 0; i < length; i++) {

						const returnAll = this.getNodeParameter('returnAll', 0) as boolean;

						const options = this.getNodeParameter('options', i) as IDataObject;

						Object.assign(qs, options);

						if (returnAll) {
							responseData = await ghostApiRequestAllItems.call(this, 'posts', 'GET', '/admin/posts', {} ,qs);
						} else {
							qs.limit = this.getNodeParameter('limit', 0);
							responseData = await ghostApiRequest.call(this, 'GET', '/admin/posts', {}, qs);
							responseData = responseData.posts;
						}

						returnData.push.apply(returnData, responseData);
					}
				}

				if (operation === 'update') {
					for (let i = 0; i < length; i++) {
						const postId = this.getNodeParameter('postId', i) as string;

						const contentFormat = this.getNodeParameter('contentFormat', i) as string;

						const updateFields = this.getNodeParameter('updateFields', i) as IDataObject;

						const post: IDataObject = {};

						if (contentFormat === 'html') {
							post.html = updateFields.content || '';
							qs.source = 'html';
							delete updateFields.content;
						} else {
							const mobileDoc = validateJSON(updateFields.contentJson as string || undefined);
							if (mobileDoc === undefined) {
								throw new NodeOperationError(this.getNode(), 'Content must be a valid JSON');
							}
							post.mobiledoc = updateFields.contentJson;
							delete updateFields.contentJson;
						}

						Object.assign(post, updateFields);

						const { posts } = await ghostApiRequest.call(this, 'GET', `/admin/posts/${postId}`, {}, { fields: 'id, updated_at' });

						if (post.published_at) {
							post.published_at = moment.tz(post.published_at, timezone).utc().format();
						}

						if (post.status === 'scheduled' && post.published_at === undefined) {
							throw new NodeOperationError(this.getNode(), 'Published at must be define when status is scheduled');
						}

						post.updated_at = posts[0].updated_at;

						responseData = await ghostApiRequest.call(this, 'PUT', `/admin/posts/${postId}`, { posts: [post] }, qs);

						returnData.push.apply(returnData, responseData.posts);
					}
				}
			}
		}
		return [this.helpers.returnJsonArray(returnData)];
	}
}
