//
//  HeaderPercView.swift
//  Reflect (iOS)
//
//  Created by Trey Tartt on 1/29/22.
//

import SwiftUI

enum PercViewType {
    case text
    case shape
}

struct HeaderPercView: View {
    @AppStorage(UserDefaultsStore.Keys.moodTint.rawValue, store: GroupUserDefaults.groupDefaults) private var moodTint: MoodTints = .Default
    @AppStorage(UserDefaultsStore.Keys.shape.rawValue, store: GroupUserDefaults.groupDefaults) private var shape: BGShape = .circle
    @AppStorage(UserDefaultsStore.Keys.theme.rawValue, store: GroupUserDefaults.groupDefaults) private var theme: Theme = .system

    private var textColor: Color { theme.currentTheme.labelColor }

    @State private var entries = [MoodMetrics]()
    let backDays: Int
    let type: PercViewType
    
    @MainActor
    init(fakeData: Bool, backDays: Int, type: PercViewType) {
        self.type = type
        self.backDays = backDays
        var moodEntries: [MoodEntryModel]?

        if fakeData {
            moodEntries = DataController.shared.randomEntries(count: 10)
        } else {
            if let daysAgoRaw = Calendar.current.date(byAdding: .day, value: -backDays, to: Date()),
               let daysAgo = Calendar.current.date(bySettingHour: 0, minute: 0, second: 0, of: daysAgoRaw) {
                moodEntries = DataController.shared.getData(startDate: daysAgo, endDate: Date(), includedDays: [1,2,3,4,5,6,7])
            }
        }
        
        if let moodEntries = moodEntries {
            let moodMetrics = Random.createTotalPerc(fromEntries: moodEntries)
            
            _entries = State(initialValue: moodMetrics.sorted(by: {
                $0.mood.rawValue > $1.mood.rawValue
            }))
        }
    }
    
    private var textViews: some View {
        VStack {
            Spacer()
            HStack {
                ForEach(entries.prefix(3), id: \.id) { model in
                    Text("\(model.percent, specifier: "%.0f")%")
                        .font(.title)
                        .fontWeight(.bold)
                        .foregroundColor(moodTint.color(forMood: model.mood))
                        .frame(maxWidth: .infinity)
                        .accessibilityLabel("\(model.mood.strValue) \(Int(model.percent)) percent")
                }
            }
            Spacer()
            HStack {
                ForEach(entries.suffix(2), id: \.id) { model in
                    Text("\(model.percent, specifier: "%.0f")%")
                        .font(.title)
                        .fontWeight(.bold)
                        .foregroundColor(moodTint.color(forMood: model.mood))
                        .frame(maxWidth: .infinity)
                        .accessibilityLabel("\(model.mood.strValue) \(Int(model.percent)) percent")
                }
            }
            Spacer()
        }
    }
    
    private var shapeViews: some View {
        VStack {
            Spacer()
            HStack {
                ForEach(entries.prefix(3), id: \.id) { model in
                    shape.view(withText:  Text("\(model.percent, specifier: "%.0f")%"),
                               bgColor: moodTint.color(forMood: model.mood),
                               textColor: textColor)
                    .frame(maxWidth: .infinity, maxHeight: .infinity)
                    .accessibilityLabel("\(model.mood.strValue) \(Int(model.percent)) percent")
                }
            }
            Spacer()
            HStack {
                ForEach(entries.suffix(2), id: \.id) { model in
                    shape.view(withText:  Text("\(model.percent, specifier: "%.0f")%"),
                               bgColor: moodTint.color(forMood: model.mood),
                               textColor: textColor)
                    .frame(maxWidth: .infinity, maxHeight: .infinity)
                    .accessibilityLabel("\(model.mood.strValue) \(Int(model.percent)) percent")
                }
            }
            Spacer()
        }
        .foregroundColor(textColor)
    }
    
    var body: some View {
        ZStack {
            switch self.type {
            case .text:
                textViews
            case .shape:
                shapeViews
                    .padding([.leading, .trailing])
            }
        }
    }
}

struct HeaderPercView_Previews: PreviewProvider {
    static var previews: some View {
        HeaderPercView(fakeData: true, backDays: 30, type: .text)
        
        HeaderPercView(fakeData: true, backDays: 30, type: .shape)
    }
}