frappe.provide('frappe.patient_history');
frappe.pages['patient_history'].on_page_load = function(wrapper) {
	let me = this;
	let page = frappe.ui.make_app_page({
		parent: wrapper,
		title: 'Patient History',
		single_column: true
	});

	frappe.breadcrumbs.add('Healthcare');
	let pid = '';
	page.main.html(frappe.render_template('patient_history', {}));
	page.main.find('.header-separator').hide();

	let patient = frappe.ui.form.make_control({
		parent: page.main.find('.patient'),
		df: {
			fieldtype: 'Link',
			options: 'Patient',
			fieldname: 'patient',
			placeholder: __('Select Patient'),
			only_select: true,
			change: function() {
				let patient_id = patient.get_value();
				if (pid != patient_id && patient_id) {
					me.start = 0;
					me.page.main.find('.patient_documents_list').html('');
					setup_filters(patient_id, me);
					get_documents(patient_id, me);
					show_patient_info(patient_id, me);
					show_patient_vital_charts(patient_id, me, 'bp', 'mmHg', 'Blood Pressure');
				}
				pid = patient_id;
			}
		},
	});
	patient.refresh();

	if (frappe.route_options) {
		patient.set_value(frappe.route_options.patient);
	}

	this.page.main.on('click', '.btn-show-chart', function() {
		let	btn_show_id = $(this).attr('data-show-chart-id'), pts = $(this).attr('data-pts');
		let title = $(this).attr('data-title');
		show_patient_vital_charts(patient.get_value(), me, btn_show_id, pts, title);
	});

	this.page.main.on('click', '.btn-more', function() {
		let	doctype = $(this).attr('data-doctype'), docname = $(this).attr('data-docname');
		if (me.page.main.find('.'+docname).parent().find('.document-html').attr('data-fetched') == '1') {
			me.page.main.find('.'+docname).hide();
			me.page.main.find('.'+docname).parent().find('.document-html').show();
		} else {
			if (doctype && docname) {
				let exclude = ['patient', 'patient_name', 'patient_sex', 'encounter_date'];
				frappe.call({
					method: 'erpnext.healthcare.utils.render_doc_as_html',
					args:{
						doctype: doctype,
						docname: docname,
						exclude_fields: exclude
					},
					freeze: true,
					callback: function(r) {
						if (r.message) {
							me.page.main.find('.' + docname).hide();

							me.page.main.find('.' + docname).parent().find('.document-html').html(
								`${r.message.html}
									<div align='center'>
										<a class='btn octicon octicon-chevron-up btn-default btn-xs btn-less'
											data-doctype='${doctype}'
											data-docname='${docname}'>
										</a>
									</div>
								`);

							me.page.main.find('.' + docname).parent().find('.document-html').show();
							me.page.main.find('.' + docname).parent().find('.document-html').attr('data-fetched', '1');
						}
					}
				});
			}
		}
	});

	this.page.main.on('click', '.btn-less', function() {
		let docname = $(this).attr('data-docname');
		me.page.main.find('.' + docname).parent().find('.document-id').show();
		me.page.main.find('.' + docname).parent().find('.document-html').hide();
	});
	me.start = 0;
	me.page.main.on('click', '.btn-get-records', function() {
		get_documents(patient.get_value(), me);
	});
};

let setup_filters = function(patient, me) {
	$('.doctype-filter').empty();
	frappe.xcall(
		'erpnext.healthcare.page.patient_history.patient_history.get_patient_history_doctypes'
	).then(document_types => {
		let doctype_filter = frappe.ui.form.make_control({
			parent: $('.doctype-filter'),
			df: {
				fieldtype: 'MultiSelectList',
				fieldname: 'document_type',
				placeholder: __('Select Document Type'),
				input_class: 'input-xs',
				change: () => {
					me.start = 0;
					me.page.main.find('.patient_documents_list').html('');
					get_documents(patient, me, doctype_filter.get_value(), date_range_field.get_value());
				},
				get_data: () => {
					return document_types.map(document_type => {
						return {
							description: document_type,
							value: document_type
						};
					});
				},
			}
		});
		doctype_filter.refresh();

		$('.date-filter').empty();
		let date_range_field = frappe.ui.form.make_control({
			df: {
				fieldtype: 'DateRange',
				fieldname: 'date_range',
				placeholder: __('Date Range'),
				input_class: 'input-xs',
				change: () => {
					let selected_date_range = date_range_field.get_value();
					if (selected_date_range && selected_date_range.length === 2) {
						me.start = 0;
						me.page.main.find('.patient_documents_list').html('');
						get_documents(patient, me, doctype_filter.get_value(), selected_date_range);
					}
				}
			},
			parent: $('.date-filter')
		});
		date_range_field.refresh();
	});
};

let get_documents = function(patient, me, document_types="", selected_date_range="") {
	let filters = {
		name: patient,
		start: me.start,
		page_length: 20
	};
	if (document_types)
		filters['document_types'] = document_types;
	if (selected_date_range)
		filters['date_range'] = selected_date_range;

	frappe.call({
		'method': 'erpnext.healthcare.page.patient_history.patient_history.get_feed',
		args: filters,
		callback: function(r) {
			let data = r.message;
			if (data.length) {
				add_to_records(me, data);
			} else {
				me.page.main.find('.patient_documents_list').append(`
					<div class='text-muted' align='center'>
						<br><br>${__('No more records..')}<br><br>
					</div>`);
				me.page.main.find('.btn-get-records').hide();
			}
		}
	});
};

let add_to_records = function(me, data) {
	let details = "<ul class='nav nav-pills nav-stacked'>";
	let i;
	for (i=0; i<data.length; i++) {
		if (data[i].reference_doctype) {
			let label = '';
			if (data[i].subject) {
				label += "<br/>" + data[i].subject;
			}
			data[i] = add_date_separator(data[i]);

			if (frappe.user_info(data[i].owner).image) {
				data[i].imgsrc = frappe.utils.get_file_link(frappe.user_info(data[i].owner).image);
			} else {
				data[i].imgsrc = false;
			}

			let time_line_heading = data[i].practitioner ? `${data[i].practitioner} ` : ``;
			time_line_heading += data[i].reference_doctype + " - " +
				`<a onclick="frappe.set_route('Form', '${data[i].reference_doctype}', '${data[i].reference_name}');">
					${data[i].reference_name}
				</a>`;

			details += `
				<li data-toggle='pill' class='patient_doc_menu'
					data-doctype='${data[i].reference_doctype}' data-docname='${data[i].reference_name}'>
					<div class='col-sm-12 d-flex border-bottom py-3'>`;

			if (data[i].imgsrc) {
				details += `
					<span class='mr-3'>
						<img class='avtar' src='${data[i].imgsrc}' width='32' height='32'></img>
					</span>`;
			} else {
				details += `<span class='mr-3 avatar avatar-small' style='width:32px; height:32px;'>
					<div align='center' class='standard-image' style='background-color: #fafbfc;'>
						${data[i].practitioner ? data[i].practitioner.charAt(0) : 'U'}
					</div>
				</span>`;
			}

			details += `<div class='d-flex flex-column width-full'>
					<div>
						`+time_line_heading+`
							<span>
								${data[i].date_sep}
							</span>
					</div>
					<div class='Box p-3 mt-2'>
						<span class='${data[i].reference_name} document-id'>${label}
							<div align='center'>
								<a class='btn octicon octicon-chevron-down btn-default btn-xs btn-more'
									data-doctype='${data[i].reference_doctype}' data-docname='${data[i].reference_name}'>
								</a>
							</div>
						</span>
						<span class='document-html' hidden  data-fetched="0">
						</span>
					</div>
				</div>
			</div>
			</li>`;
		}
	}

	details += '</ul>';
	me.page.main.find('.patient_documents_list').append(details);
	me.start += data.length;

	if (data.length === 20) {
		me.page.main.find(".btn-get-records").show();
	} else {
		me.page.main.find(".btn-get-records").hide();
		me.page.main.find(".patient_documents_list").append(`
			<div class='text-muted' align='center'>
				<br><br>${__('No more records..')}<br><br>
			</div>`);
	}
};

let add_date_separator = function(data) {
	let date = frappe.datetime.str_to_obj(data.communication_date);
	let pdate = '';
	let diff = frappe.datetime.get_day_diff(frappe.datetime.get_today(), frappe.datetime.obj_to_str(date));

	if (diff < 1) {
		pdate = __('Today');
	} else if (diff < 2) {
		pdate = __('Yesterday');
	} else {
		pdate = __('on ') + frappe.datetime.global_date_format(date);
	}
	data.date_sep = pdate;
	return data;
};

let show_patient_info = function(patient, me) {
	frappe.call({
		'method': 'erpnext.healthcare.doctype.patient.patient.get_patient_detail',
		args: {
			patient: patient
		},
		callback: function(r) {
			let data = r.message;
			let details = '';
			if (data.image) {
				details += `<div><img class='thumbnail' width=75% src='${data.image}'></div>`;
			}

			details += `<b> ${data.patient_name} </b><br> ${data.sex}`;
			if (data.email) details += `<br> ${data.email}`;
			if (data.mobile) details += `<br> ${data.mobile}`;
			if (data.occupation) details += `<br><br><b> ${__('Occupation')} : </b> ${data.occupation}`;
			if (data.blood_group) details += `<br><b> ${__('Blood Group')} : </b> ${data.blood_group}`;
			if (data.allergies) details +=  `<br><br><b> ${__('Allerigies')} : </b> ${data.allergies.replace("\n", ", ")}`;
			if (data.medication) details +=  `<br><b> ${__('Medication')} : </b> ${data.medication.replace("\n", ", ")}`;
			if (data.alcohol_current_use) details +=  `<br><br><b> ${__('Alcohol use')} : </b> ${data.alcohol_current_use}`;
			if (data.alcohol_past_use) details +=  `<br><b> ${__('Alcohol past use')} : </b> ${data.alcohol_past_use}`;
			if (data.tobacco_current_use) details +=  `<br><b> ${__('Tobacco use')} : </b> ${data.tobacco_current_use}`;
			if (data.tobacco_past_use) details +=  `<br><b> ${__('Tobacco past use')} : </b> ${data.tobacco_past_use}`;
			if (data.medical_history) details +=  `<br><br><b> ${__('Medical history')} : </b> ${data.medical_history.replace("\n", ", ")}`;
			if (data.surgical_history) details +=  `<br><b> ${__('Surgical history')} : </b> ${data.surgical_history.replace("\n", ", ")}`;
			if (data.surrounding_factors) details +=  `<br><br><b> ${__('Occupational hazards')} : </b> ${data.surrounding_factors.replace("\n", ", ")}`;
			if (data.other_risk_factors) details += `<br><b> ${__('Other risk factors')} : </b> ${data.other_risk_factors.replace("\n", ", ")}`;
			if (data.patient_details) details += `<br><br><b> ${__('More info')} : </b> ${data.patient_details.replace("\n", ", ")}`;

			if (details) {
				details = `<div style='padding-left:10px; font-size:13px;' align='left'>` + details + `</div>`;
			}
			me.page.main.find('.patient_details').html(details);
		}
	});
};

let show_patient_vital_charts = function(patient, me, btn_show_id, pts, title) {
	frappe.call({
		method: 'erpnext.healthcare.utils.get_patient_vitals',
		args:{
			patient: patient
		},
		callback: function(r) {
			if (r.message) {
				let show_chart_btns_html = `
					<div style='padding-top:10px;'>
						<a class='btn btn-default btn-xs btn-show-chart' data-show-chart-id='bp' data-pts='mmHg' data-title='Blood Pressure'>
							${__('Blood Pressure')}
						</a>
						<a class='btn btn-default btn-xs btn-show-chart' data-show-chart-id='pulse_rate' data-pts='per Minutes' data-title='Respiratory/Pulse Rate'>
							${__('Respiratory/Pulse Rate')}
						</a>
						<a class='btn btn-default btn-xs btn-show-chart' data-show-chart-id='temperature' data-pts='°C or °F' data-title='Temperature'>
							${__('Temperature')}
						</a>
						<a class='btn btn-default btn-xs btn-show-chart' data-show-chart-id='bmi' data-pts='' data-title='BMI'>
							${__('BMI')}
						</a>
					</div>`;

				me.page.main.find('.show_chart_btns').html(show_chart_btns_html);
				let data = r.message;
				let labels = [], datasets = [];
				let bp_systolic = [], bp_diastolic = [], temperature = [];
				let pulse = [], respiratory_rate = [], bmi = [], height = [], weight = [];

				for (let i=0; i<data.length; i++) {
					labels.push(data[i].signs_date+'||'+data[i].signs_time);

					if (btn_show_id === 'bp') {
						bp_systolic.push(data[i].bp_systolic);
						bp_diastolic.push(data[i].bp_diastolic);
					}
					if (btn_show_id === 'temperature') {
						temperature.push(data[i].temperature);
					}
					if (btn_show_id === 'pulse_rate') {
						pulse.push(data[i].pulse);
						respiratory_rate.push(data[i].respiratory_rate);
					}
					if (btn_show_id === 'bmi') {
						bmi.push(data[i].bmi);
						height.push(data[i].height);
						weight.push(data[i].weight);
					}
				}
				if (btn_show_id === 'temperature') {
					datasets.push({name: 'Temperature', values: temperature, chartType: 'line'});
				}
				if (btn_show_id === 'bmi') {
					datasets.push({name: 'BMI', values: bmi, chartType: 'line'});
					datasets.push({name: 'Height', values: height, chartType: 'line'});
					datasets.push({name: 'Weight', values: weight, chartType: 'line'});
				}
				if (btn_show_id === 'bp') {
					datasets.push({name: 'BP Systolic', values: bp_systolic, chartType: 'line'});
					datasets.push({name: 'BP Diastolic', values: bp_diastolic, chartType: 'line'});
				}
				if (btn_show_id === 'pulse_rate') {
					datasets.push({name: 'Heart Rate / Pulse', values: pulse, chartType: 'line'});
					datasets.push({name: 'Respiratory Rate', values: respiratory_rate, chartType: 'line'});
				}
				new frappe.Chart('.patient_vital_charts', {
					data: {
						labels: labels,
						datasets: datasets
					},

					title: title,
					type: 'axis-mixed',
					height: 200,
					colors: ['purple', '#ffa3ef', 'light-blue'],

					tooltipOptions: {
						formatTooltipX: d => (d + '').toUpperCase(),
						formatTooltipY: d => d + ' ' + pts,
					}
				});
				me.page.main.find('.header-separator').show();
			} else {
				me.page.main.find('.patient_vital_charts').html('');
				me.page.main.find('.show_chart_btns').html('');
				me.page.main.find('.header-separator').hide();
			}
		}
	});
};