//
//  CollectionViewMonth.swift
//  Graphic Analysis 2
//
//  Created by Kilian Hofmann on 16.06.17.
//  Copyright © 2017 Kilian Hofmann. All rights reserved.
//

import Cocoa

class CollectionViewMonth: NSObject {
    var days: [[FileWrapper?]] = []
    var month: Int? = nil
    let monthNames: [String] = ["January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"]
    let operationQueue: OperationQueue = OperationQueue()
    var doc: Document!
    
    override init() {
        super.init()
        operationQueue.maxConcurrentOperationCount = 10
    }
    
    init(days: [[FileWrapper?]], document: Document) {
        super.init()
        self.days = days
        doc = document
    }
}

extension CollectionViewMonth: NSCollectionViewDataSource {
    func collectionView(_ collectionView: NSCollectionView, numberOfItemsInSection section: Int) -> Int {
        return 31
    }
    
    func collectionView(_ itemForRepresentedObjectAtcollectionView: NSCollectionView, itemForRepresentedObjectAt indexPath: IndexPath) -> NSCollectionViewItem {
        let item = itemForRepresentedObjectAtcollectionView.makeItem(withIdentifier: "CollectionViewItemMonth", for: indexPath)
        guard let item2 = item as? CollectionViewItemMonth else {
            self.doc.progress.increment(by: 100/31)
            if self.doc.progress.doubleValue > 98 {
                self.doc.progress.isHidden = true
            }
            return item
        }
        if item2.isSelected {
            item2.view.layer?.borderColor = NSColor.gray.cgColor
        } else {
            item2.view.layer?.borderColor = NSColor.clear.cgColor
            item2.graph?.close()
        }
        item2.distribution = []
        let op: OperationQueue = OperationQueue()
        op.maxConcurrentOperationCount = 1
        item2.clearDistribution()
        item2.loss.stringValue = ""
        item2.day.textColor = NSColor.controlShadowColor
        item2.day.stringValue = "\(indexPath.item + 1)"
        guard month != nil else {
            self.doc.progress.increment(by: 100/31)
            if self.doc.progress.doubleValue > 98 {
                self.doc.progress.isHidden = true
            }
            return item2
        }
        if indexPath.item == 0 {
            item2.month.stringValue = monthNames[month!]
        } else {
            item2.month.stringValue = ""
        }
        guard let day = days[month!][indexPath.item] else {
            self.doc.progress.increment(by: 100/31)
            if self.doc.progress.doubleValue > 98 {
                self.doc.progress.isHidden = true
            }
            return item2
        }
        item2.day.textColor = NSColor.black
        operationQueue.addOperation {
            guard let log = day.fileWrappers?["KDLog.hex"] else {
                OperationQueue.main.addOperation {
                    self.doc.progress.increment(by: 100/31)
                    if self.doc.progress.doubleValue > 98 {
                        self.doc.progress.isHidden = true
                    }
                }
                return
            }
            /*
            guard var logA = String(data: log.regularFileContents!, encoding: .utf8)?.components(separatedBy: "\n") else { return }
             */
            guard var logA = FileOperations.load(log: log.regularFileContents! as NSData) else { return }
            logA.removeLast()
            item2.distribution = logA
            OperationQueue.main.addOperation {
                item2.loss.stringValue = "\(logA.count)"
                item2.redrawDistribution()
                self.doc.progress.increment(by: 100/31)
                if self.doc.progress.doubleValue > 98 {
                    self.doc.progress.isHidden = true
                }
            }
        }
        item2.dayFW = day
        return item2
    }
}

extension CollectionViewMonth : NSCollectionViewDelegate {
    func collectionView(_ collectionView: NSCollectionView, didSelectItemsAt indexPaths: Set<IndexPath>) {
        guard let item = (collectionView.item(at: indexPaths.first!) as? CollectionViewItemMonth) else { return }
        item.view.layer?.borderColor = NSColor.gray.cgColor
        item.graph?.showWindow(self)
    }
    
    func collectionView(_ collectionView: NSCollectionView, didDeselectItemsAt indexPaths: Set<IndexPath>) {
        guard let item = (collectionView.item(at: indexPaths.first!) as? CollectionViewItemMonth) else { return }
        item.view.layer?.borderColor = NSColor.clear.cgColor
        item.graph?.close()
    }
}