// Copyright (C) 2016 Inigo Valentin
//
// This file is part of the Gasteizko Margolariak IOS app.
//
// The Gasteizko Margolariak IOS app 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 3 of the License, or (at your
// option) any later version.
//
// The Gasteizko Margolariak IOS app 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 the Gasteizko Margolariak IOS app.
// If not, see <http://www.gnu.org/licenses/>.

import Foundation
import CoreData
import UIKit

/**
Class to handle the activities view.
*/
class ActivitiesView: UIView {
	
	// Outlets.
	@IBOutlet var container: ActivitiesView!
	@IBOutlet weak var futureSection: Section!
	@IBOutlet weak var pastSection: Section!

	var delegate: AppDelegate? = nil
	var storyboard: UIStoryboard? = nil
	var controller: ViewController? = nil
	var lang: String? = nil
	var futureList: UIStackView? = nil
	var pastList: UIStackView? = nil
	var context: NSManagedObjectContext? = nil
	
	
	/**
	Default contstructor for the interface builder.
	*/
	override init(frame: CGRect){
		super.init(frame: frame)
	}
	
	
	/**
	Run when the view is started.
	*/
	required init?(coder aDecoder: NSCoder) {
		
		super.init(coder: aDecoder)
		
		//Load the contents of the HomeView.xib file.
		Bundle.main.loadNibNamed("ActivitiesView", owner: self, options: nil)
		self.addSubview(container)
		self.container.frame = self.bounds
		self.futureSection.setTitle(text: "Próximas actividades")
		self.pastSection.setTitle(text: "Últimas actividades")
		self.futureList = self.futureSection.getContentStack()
		self.pastList = self.pastSection.getContentStack()
		
		// Get viewController from StoryBoard
		self.storyboard = UIStoryboard(name: "Main", bundle: nil)
		self.controller = self.storyboard?.instantiateViewController(withIdentifier: "GMViewController") as? ViewController
		self.context = NSManagedObjectContext(concurrencyType: .privateQueueConcurrencyType)
		self.delegate = UIApplication.shared.delegate as? AppDelegate
		self.lang = self.getLanguage()
		self.context?.persistentStoreCoordinator = self.delegate?.persistentStoreCoordinator

		// Populate activity lists.
		populate()
	}
	
	
	/**
	Actually populates the section.
	*/
	func populate(){
		// Show future activities
		var fetchRequest: NSFetchRequest<Activity> = Activity.fetchRequest()
		var sortDescriptor = NSSortDescriptor(key: "date", ascending: true)
		var sortDescriptors = [sortDescriptor]
		fetchRequest.sortDescriptors = sortDescriptors
		fetchRequest.predicate = NSPredicate(format: "date > %@", NSDate())
		
		do {
			let searchResults = try self.context?.fetch(fetchRequest)
			if searchResults?.count == 0{
				let row: RowLabel = RowLabel.init(s: "rowFutureActivity0", i: 0)
				row.setText(text: "No hay actividades planeadas proximamente. Pronto organizaremos algo!")
				self.futureList?.addArrangedSubview(row)
			}
			else{
			
				var row : RowFutureActivity
				var count = 0
				var id: Int
				var title: String
				var text: String
				var image: String
				var city: String
				var price: Int
				var date: NSDate
			
				for r in searchResults! {
					count = count + 1
				
					// Create a new row
					row = RowFutureActivity.init(s: "rowFutureActivity\(count)", i: count)
					id = r.value(forKey: "id")! as! Int
					title = r.value(forKey: "title_\(lang!)")! as! String
                    text = r.value(forKey: "text_\(lang!)")! as! String
					city = r.value(forKey: "city")! as! String
					price = r.value(forKey: "price")! as! Int
					date = r.value(forKey: "date")! as! NSDate
					row.setTitle(text: title)
					row.setText(text: text)
					row.setPrice(price: price)
					row.setCity(text: city)
					row.setDate(date: date, lang: lang!)
					row.id = id
				
					// Get main image
					image = ""
					let imgFetchRequest: NSFetchRequest<Activity_image> = Activity_image.fetchRequest()
					let imgSortDescriptor = NSSortDescriptor(key: "idx", ascending: true)
					let imgSortDescriptors = [imgSortDescriptor]
					imgFetchRequest.sortDescriptors = imgSortDescriptors
					imgFetchRequest.predicate = NSPredicate(format: "activity == %i", id)
					imgFetchRequest.fetchLimit = 1
					do{
						let imgSearchResults = try self.context?.fetch(imgFetchRequest)
						for imgR in imgSearchResults!{
							image = imgR.value(forKey: "image")! as! String
							row.setImage(filename: image)
						}
					} catch {
						NSLog(":ACTIVITIES:ERROR: Error getting image for activity \(id): \(error)")
					}
				
					self.futureList?.addArrangedSubview(row)
				}
				self.futureList?.setNeedsLayout()
				self.futureList?.layoutIfNeeded()
				
			}
		}
		catch {
			NSLog(":ACTIVITIES:ERROR: Error with request: \(error)")
		}
		
		
		// Show past activities
		fetchRequest = Activity.fetchRequest()
		sortDescriptor = NSSortDescriptor(key: "date", ascending: false)
		sortDescriptors = [sortDescriptor]
		fetchRequest.sortDescriptors = sortDescriptors
		fetchRequest.predicate = NSPredicate(format: "date < %@", NSDate())
		
		do {
			let searchResults = try self.context?.fetch(fetchRequest)
			
			var row: RowPastActivity
			var count: Int = 0
			var id: Int
			var title: String
			var text: String
			var image: String
			
			for r in searchResults! {
				count = count + 1
				
				// Create a new row
				row = RowPastActivity.init(s: "rowPastActivity\(count)", i: count)
				id = r.value(forKey: "id")! as! Int
				title = r.value(forKey: "title_\(lang!)")! as! String
                if ((r.value(forKey: "after_\(lang!)") != nil) && ((r.value(forKey: "after_\(lang!)")! as! String).length != 0)){
                    text = r.value(forKey: "after_\(lang!)")! as! String
                }
                else{
                    text = r.value(forKey: "text_\(lang!)")! as! String
                }
				row.setTitle(text: title)
				row.setText(text: text)
				row.id = id
				
				// Get main image
				image = ""
				let imgFetchRequest: NSFetchRequest<Activity_image> = Activity_image.fetchRequest()
				let imgSortDescriptor = NSSortDescriptor(key: "idx", ascending: true)
				let imgSortDescriptors = [imgSortDescriptor]
				imgFetchRequest.sortDescriptors = imgSortDescriptors
				imgFetchRequest.predicate = NSPredicate(format: "activity == %i", id)
				imgFetchRequest.fetchLimit = 1
				do{
					let imgSearchResults = try self.context?.fetch(imgFetchRequest)
					for imgR in imgSearchResults!{
						image = imgR.value(forKey: "image")! as! String
						row.setImage(filename: image)
					}
				}
				catch {
					NSLog(":ACTIVITIES:ERROR: Error getting image for activity \(id): \(error)")
				}
				
				
				self.pastList?.addArrangedSubview(row)
			}
			self.pastList?.setNeedsLayout()
			self.pastList?.layoutIfNeeded()
			
		} catch {
			NSLog(":ACTIVITIES:ERROR: Error with request: \(error)")
		}
	}
	
	/**
	Gets the device language. The only recognized languages are Spanish, English and Basque.
	If the device has another language, Spanish will be selected by default.
	:return: Two-letter language code.
	*/
	func getLanguage() -> String{
		let pre = NSLocale.preferredLanguages[0].subStr(start: 0, end: 1)
		if(pre == "es" || pre == "en" || pre == "eu"){
			return pre
		}
		else{
			return "es"
		}
	}
}