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

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

import {
	apiTemplateIoApiRequest,
	downloadImage,
	loadResource,
	validateJSON,
} from './GenericFunctions';

export class ApiTemplateIo implements INodeType {
	description: INodeTypeDescription = {
		displayName: 'APITemplate.io',
		name: 'ApiTemplateIo',
		icon: 'file:apiTemplateIo.svg',
		group: ['transform'],
		version: 1,
		description: 'Consume the APITemplate.io API',
		subtitle: '={{$parameter["operation"] + ": " + $parameter["resource"]}}',
		defaults: {
			name: 'APITemplate.io',
			color: '#c0c0c0',
		},
		inputs: ['main'],
		outputs: ['main'],
		credentials: [
			{
				name: 'apiTemplateIoApi',
				required: true,
			},
		],
		properties: [
			{
				displayName: 'Resource',
				name: 'resource',
				type: 'options',
				options: [
					{
						name: 'Account',
						value: 'account',
					},
					{
						name: 'Image',
						value: 'image',
					},
					{
						name: 'PDF',
						value: 'pdf',
					},
				],
				default: 'image',
				description: 'Resource to consume',
			},
			{
				displayName: 'Operation',
				name: 'operation',
				type: 'options',
				default: 'create',
				required: true,
				description: 'Operation to perform',
				options: [
					{
						name: 'Create',
						value: 'create',
					},
				],
				displayOptions: {
					show: {
						resource: [
							'image',
							'pdf',
						],
					},
				},
			},
			{
				displayName: 'Operation',
				name: 'operation',
				type: 'options',
				default: 'get',
				required: true,
				description: 'Operation to perform',
				options: [
					{
						name: 'Get',
						value: 'get',
					},
				],
				displayOptions: {
					show: {
						resource: [
							'account',
						],
					},
				},
			},
			{
				displayName: 'Template ID',
				name: 'imageTemplateId',
				type: 'options',
				required: true,
				default: '',
				description: 'ID of the image template to use.',
				typeOptions: {
					loadOptionsMethod: 'getImageTemplates',
				},
				displayOptions: {
					show: {
						resource: [
							'image',
						],
						operation: [
							'create',
						],
					},
				},
			},
			{
				displayName: 'Template ID',
				name: 'pdfTemplateId',
				type: 'options',
				required: true,
				default: '',
				description: 'ID of the PDF template to use.',
				typeOptions: {
					loadOptionsMethod: 'getPdfTemplates',
				},
				displayOptions: {
					show: {
						resource: [
							'pdf',
						],
						operation: [
							'create',
						],
					},
				},
			},
			{
				displayName: 'JSON Parameters',
				name: 'jsonParameters',
				type: 'boolean',
				default: false,
				displayOptions: {
					show: {
						resource: [
							'pdf',
							'image',
						],
						operation: [
							'create',
						],
					},
				},
			},
			{
				displayName: 'Download',
				name: 'download',
				type: 'boolean',
				default: false,
				displayOptions: {
					show: {
						resource: [
							'pdf',
							'image',
						],
						operation: [
							'create',
						],
					},
				},
				description: 'Name of the binary property to which to<br />write the data of the read file.',
			},
			{
				displayName: 'Binary Property',
				name: 'binaryProperty',
				type: 'string',
				required: true,
				default: 'data',
				description: 'Name of the binary property to which to write to.',
				displayOptions: {
					show: {
						resource: [
							'pdf',
							'image',
						],
						operation: [
							'create',
						],
						download: [
							true,
						],
					},
				},
			},
			{
				displayName: 'Overrides (JSON)',
				name: 'overridesJson',
				type: 'json',
				default: '',
				displayOptions: {
					show: {
						resource: [
							'image',
						],
						operation: [
							'create',
						],
						jsonParameters: [
							true,
						],
					},
				},
				placeholder: `[ {"name": "text_1", "text": "hello world", "textBackgroundColor": "rgba(246, 243, 243, 0)" } ]`,
			},
			{
				displayName: 'Properties (JSON)',
				name: 'propertiesJson',
				type: 'json',
				default: '',
				displayOptions: {
					show: {
						resource: [
							'pdf',
						],
						operation: [
							'create',
						],
						jsonParameters: [
							true,
						],
					},
				},
				placeholder: `{ "name": "text_1" }`,
			},
			{
				displayName: 'Overrides',
				name: 'overridesUi',
				placeholder: 'Add Override',
				type: 'fixedCollection',
				typeOptions: {
					multipleValues: true,
				},
				displayOptions: {
					show: {
						resource: [
							'image',
						],
						operation: [
							'create',
						],
						jsonParameters: [
							false,
						],
					},
				},
				default: {},
				options: [
					{
						name: 'overrideValues',
						displayName: 'Override',
						values: [
							{
								displayName: 'Properties',
								name: 'propertiesUi',
								placeholder: 'Add Property',
								type: 'fixedCollection',
								typeOptions: {
									multipleValues: true,
								},
								default: {},
								options: [
									{
										name: 'propertyValues',
										displayName: 'Property',
										values: [
											{
												displayName: 'Key',
												name: 'key',
												type: 'string',
												default: '',
												description: 'Name of the property',
											},
											{
												displayName: 'Value',
												name: 'value',
												type: 'string',
												default: '',
												description: 'Value to the property.',
											},
										],
									},
								],
							},
						],
					},
				],
			},
			{
				displayName: 'Properties',
				name: 'propertiesUi',
				placeholder: 'Add Property',
				type: 'fixedCollection',
				typeOptions: {
					multipleValues: true,
				},
				default: {},
				displayOptions: {
					show: {
						resource: [
							'pdf',
						],
						operation: [
							'create',
						],
						jsonParameters: [
							false,
						],
					},
				},
				options: [
					{
						name: 'propertyValues',
						displayName: 'Property',
						values: [
							{
								displayName: 'Key',
								name: 'key',
								type: 'string',
								default: '',
								description: 'Name of the property',
							},
							{
								displayName: 'Value',
								name: 'value',
								type: 'string',
								default: '',
								description: 'Value to the property.',
							},
						],
					},
				],
			},
			{
				displayName: 'Options',
				name: 'options',
				type: 'collection',
				placeholder: 'Add Field',
				displayOptions: {
					show: {
						operation: [
							'create',
						],
						resource: [
							'pdf',
							'image',
						],
						'download': [
							true,
						],
					},
				},
				default: {},
				options: [
					{
						displayName: 'File Name',
						name: 'fileName',
						type: 'string',
						default: '',
						description: 'The name of the downloaded image/pdf. It has to include the extension. For example: report.pdf',
					},
				],
			},
		],
	};

	methods = {
		loadOptions: {
			async getImageTemplates(this: ILoadOptionsFunctions): Promise<INodePropertyOptions[]> {
				return await loadResource.call(this, 'image');
			},

			async getPdfTemplates(this: ILoadOptionsFunctions): Promise<INodePropertyOptions[]> {
				return await loadResource.call(this, 'pdf');
			},
		},
	};

	async execute(this: IExecuteFunctions) {
		const items = this.getInputData();
		const returnData: IDataObject[] = [];
		const length = items.length;

		let responseData;

		const resource = this.getNodeParameter('resource', 0) as string;
		const operation = this.getNodeParameter('operation', 0) as string;

		if (resource === 'account') {

			// *********************************************************************
			//                               account
			// *********************************************************************

			if (operation === 'get') {

				// ----------------------------------
				//         account: get
				// ----------------------------------

				for (let i = 0; i < length; i++) {

					responseData = await apiTemplateIoApiRequest.call(this, 'GET', '/account-information');

					returnData.push(responseData);
				}
			}

		} else if (resource === 'image') {

			// *********************************************************************
			//                               image
			// *********************************************************************

			if (operation === 'create') {
				// ----------------------------------
				//          image: create
				// ----------------------------------

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

				// https://docs.apitemplate.io/reference/api-reference.html#create-an-image-jpeg-and-png
				for (let i = 0; i < length; i++) {
					const jsonParameters = this.getNodeParameter('jsonParameters', i) as boolean;

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

					const qs = {
						template_id: this.getNodeParameter('imageTemplateId', i),
					};

					const body = { overrides: [] } as IDataObject;

					if (jsonParameters === false) {
						const overrides = (this.getNodeParameter('overridesUi', i) as IDataObject || {}).overrideValues as IDataObject[] || [];
						if (overrides.length !== 0) {
							const data: IDataObject[] = [];
							for (const override of overrides) {
								const properties = (override.propertiesUi as IDataObject || {}).propertyValues as IDataObject[] || [];
								data.push(properties.reduce((obj, value) => Object.assign(obj, { [`${value.key}`]: value.value }), {}));
							}
							body.overrides = data;
						}
					} else {
						const overrideJson = this.getNodeParameter('overridesJson', i) as string;
						if (overrideJson !== '') {
							const data = validateJSON(overrideJson);
							if (data === undefined) {
								throw new Error('A valid JSON must be provided.');
							}
							body.overrides = data;
						}
					}

					responseData = await apiTemplateIoApiRequest.call(this, 'POST', '/create', qs, body);

					if (download === true) {
						const binaryProperty = this.getNodeParameter('binaryProperty', i) as string;
						const data = await downloadImage.call(this, responseData.download_url);
						const fileName = responseData.download_url.split('/').pop();
						const binaryData = await this.helpers.prepareBinaryData(data, options.fileName || fileName);
						responseData = {
							json: responseData,
							binary: {
								[binaryProperty]: binaryData,
							},
						};
					}
					returnData.push(responseData);
				}

				if (download === true) {
					return this.prepareOutputData(returnData as unknown as INodeExecutionData[]);
				}
			}

		} else if (resource === 'pdf') {

			// *********************************************************************
			//                               pdf
			// *********************************************************************

			if (operation === 'create') {

				// ----------------------------------
				//          pdf: create
				// ----------------------------------

				// https://docs.apitemplate.io/reference/api-reference.html#create-a-pdf
				const download = this.getNodeParameter('download', 0) as boolean;

				for (let i = 0; i < length; i++) {
					const jsonParameters = this.getNodeParameter('jsonParameters', i) as boolean;

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

					const qs = {
						template_id: this.getNodeParameter('pdfTemplateId', i),
					};

					let data;

					if (jsonParameters === false) {
						const properties = (this.getNodeParameter('propertiesUi', i) as IDataObject || {}).propertyValues as IDataObject[] || [];
						if (properties.length === 0) {
							throw new Error('The parameter properties cannot be empty');
						}
						data = properties.reduce((obj, value) => Object.assign(obj, { [`${value.key}`]: value.value }), {});
					} else {
						const propertiesJson = this.getNodeParameter('propertiesJson', i) as string;
						data = validateJSON(propertiesJson);
						if (data === undefined) {
							throw new Error('A valid JSON must be provided.');
						}
					}

					responseData = await apiTemplateIoApiRequest.call(this, 'POST', '/create', qs, data);

					if (download === true) {
						const binaryProperty = this.getNodeParameter('binaryProperty', i) as string;
						const data = await downloadImage.call(this, responseData.download_url);
						const fileName = responseData.download_url.split('/').pop();
						const binaryData = await this.helpers.prepareBinaryData(data, options.fileName || fileName);
						responseData = {
							json: responseData,
							binary: {
								[binaryProperty]: binaryData,
							},
						};
					}
					returnData.push(responseData);
				}
				if (download === true) {
					return this.prepareOutputData(returnData as unknown as INodeExecutionData[]);
				}
			}
		}
		return [this.helpers.returnJsonArray(returnData)];
	}
}