//
//  UserDefaultsStore.swift
//  Feels (iOS)
//
//  Created by Trey Tartt on 1/22/22.
//

import Foundation

enum VotingLayoutStyle: Int, CaseIterable {
    case horizontal = 0   // Current: 5 buttons in a row
    case cards = 1        // Larger tappable cards with labels
    case radial = 2       // Semi-circle/wheel arrangement
    case stacked = 3      // Full-width vertical list

    var displayName: String {
        switch self {
        case .horizontal: return "Horizontal"
        case .cards: return "Cards"
        case .radial: return "Radial"
        case .stacked: return "Stacked"
        }
    }
}

class UserDefaultsStore {
    enum Keys: String {
        case savedOnboardingData
        case needsOnboarding
        case useCloudKit
        case deleteEnable
        case mainViewTopHeaderIndex
        case theme
        case moodImages
        case moodTint
        case personalityPack
        case customWidget
        case customMoodTint
        case customMoodTintUpdateNumber
        case textColor
        case showNSFW
        case shape
        case daysFilter
        case firstLaunchDate
        case hasActiveSubscription
        case lastVotedDate
        case votingLayoutStyle

        case contentViewCurrentSelectedHeaderViewBackDays
        case contentViewHeaderTag
        case contentViewHeaderTagViewOneViewType
        case contentViewHeaderTagViewTwoViewType
        case currentSelectedHeaderViewViewType
    }
    
    static func getOnboarding() -> OnboardingData {
        if let data = GroupUserDefaults.groupDefaults.object(forKey: UserDefaultsStore.Keys.savedOnboardingData.rawValue) as? Data,
           let model = try? JSONDecoder().decode(OnboardingData.self, from: data) {
            return model
        } else {
            return OnboardingData()
        }
    }
    
    @discardableResult
    static func saveOnboarding(onboardingData: OnboardingData) -> OnboardingData {
        do {
            let data = try JSONEncoder().encode(onboardingData)
            GroupUserDefaults.groupDefaults.set(data, forKey: UserDefaultsStore.Keys.savedOnboardingData.rawValue)
        } catch {
            print("Error saving onboarding: \(error)")
        }
        return UserDefaultsStore.getOnboarding()
    }
    
    static func moodMoodImagable() -> MoodImagable.Type {
        if let data = GroupUserDefaults.groupDefaults.object(forKey: UserDefaultsStore.Keys.moodImages.rawValue) as? Int,
           let model = MoodImages.init(rawValue: data) {
            return model.moodImages
        } else {
            return MoodImages.FontAwesome.moodImages
        }
    }
    
    static func moodTintable() -> MoodTintable.Type {
        if let data = GroupUserDefaults.groupDefaults.object(forKey: UserDefaultsStore.Keys.moodTint.rawValue) as? Int,
           let model = MoodTints.init(rawValue: data) {
            return model.moodTints
        } else {
            return MoodTints.Default.moodTints
        }
    }
    
    static func personalityPackable() -> PersonalityPack {
        if let data = GroupUserDefaults.groupDefaults.object(forKey: UserDefaultsStore.Keys.personalityPack.rawValue) as? Int,
           let model = PersonalityPack.init(rawValue: data) {
            return model
        } else {
            return PersonalityPack.Default
        }
    }
    
    static func theme() -> Theme {
        if let data = GroupUserDefaults.groupDefaults.object(forKey: UserDefaultsStore.Keys.theme.rawValue) as? Int,
           let model = Theme.init(rawValue: data) {
            return model
        } else {
            return Theme.system
        }
    }
    
    static func getCustomWidgets() -> [CustomWidgetModel] {
        if let data = GroupUserDefaults.groupDefaults.object(forKey: UserDefaultsStore.Keys.customWidget.rawValue) as? Data,
           let model = try? JSONDecoder().decode([CustomWidgetModel].self, from: data) {
            return model
        } else {
            GroupUserDefaults.groupDefaults.removeObject(forKey: UserDefaultsStore.Keys.customWidget.rawValue)

            let widget = CustomWidgetModel.randomWidget
            widget.isSaved = true
            let widgets = [widget]

            guard let data = try? JSONEncoder().encode(widgets) else {
                return widgets
            }
            GroupUserDefaults.groupDefaults.set(data, forKey: UserDefaultsStore.Keys.customWidget.rawValue)

            if let savedData = GroupUserDefaults.groupDefaults.object(forKey: UserDefaultsStore.Keys.customWidget.rawValue) as? Data,
               let models = try? JSONDecoder().decode([CustomWidgetModel].self, from: savedData) {
                return models.sorted { $0.createdDate < $1.createdDate }
            } else {
                return widgets
            }
        }
    }
    
    @discardableResult
    static func saveCustomWidget(widgetModel: CustomWidgetModel, inUse: Bool) -> [CustomWidgetModel] {
        do {
            var existingWidgets = getCustomWidgets()
            
            if let exisitingWidget = existingWidgets.firstIndex(where: {
                $0.uuid == widgetModel.uuid
            }) {
                existingWidgets.remove(at: exisitingWidget)
                // give it differnet uuid so the view updates
                widgetModel.uuid = UUID().uuidString
            }
            
            if inUse {
                existingWidgets.forEach({
                    $0.inUse = false
                })
                
                widgetModel.inUse = true
            }
    
            existingWidgets.append(widgetModel)
            existingWidgets.forEach({
                $0.isSaved = true
            })
            let data = try JSONEncoder().encode(existingWidgets)
            GroupUserDefaults.groupDefaults.set(data, forKey: UserDefaultsStore.Keys.customWidget.rawValue)
        } catch {
            print("Error saving custom widget: \(error)")
        }
        return UserDefaultsStore.getCustomWidgets()
    }

    @discardableResult
    static func deleteCustomWidget(withUUID uuid: String) -> [CustomWidgetModel] {
        do {
            var existingWidgets = getCustomWidgets()
            
            if let exisitingWidget = existingWidgets.firstIndex(where: {
                $0.uuid == uuid
            }) {
                existingWidgets.remove(at: exisitingWidget)
            }
            
            if existingWidgets.count == 0 {
                let widget = CustomWidgetModel.randomWidget
                widget.isSaved = true
                widget.inUse = true
                existingWidgets.append(widget)
            }
            
            if existingWidgets.first(where: { $0.inUse == true }) == nil {
                existingWidgets.first?.inUse = true
            }

            let data = try JSONEncoder().encode(existingWidgets)
            GroupUserDefaults.groupDefaults.set(data, forKey: UserDefaultsStore.Keys.customWidget.rawValue)
        } catch {
            print("Error deleting custom widget: \(error)")
        }
        return UserDefaultsStore.getCustomWidgets()
    }

    static func getCustomMoodTint() -> SavedMoodTint {
        if let data = GroupUserDefaults.groupDefaults.object(forKey: UserDefaultsStore.Keys.customMoodTint.rawValue) as? Data{
            do {
                let model = try JSONDecoder().decode(SavedMoodTint.self, from: data)
                return model
            } catch {
                print(error)
            }
        }
        return SavedMoodTint()
    }
    
    static func getCustomBGShape() -> BGShape {
        if let data = GroupUserDefaults.groupDefaults.object(forKey: UserDefaultsStore.Keys.shape.rawValue) as? Int,
           let model = BGShape.init(rawValue: data) {
            return model
        } else {
            return BGShape.circle
        }
    }
    
    @discardableResult
    static func saveCustomMoodTint(customTint: SavedMoodTint) -> SavedMoodTint {
        do {
            let data = try JSONEncoder().encode(customTint)
            GroupUserDefaults.groupDefaults.set(data, forKey: UserDefaultsStore.Keys.customMoodTint.rawValue)
        } catch {
            print("Error saving custom mood tint: \(error)")
        }
        return UserDefaultsStore.getCustomMoodTint()
    }
    
    @discardableResult
    static func saveDaysFilter(days: [Int]) -> [Int] {
        GroupUserDefaults.groupDefaults.set(days, forKey: UserDefaultsStore.Keys.daysFilter.rawValue)
        return UserDefaultsStore.getDaysFilter()
    }
    
    static func getDaysFilter() -> [Int] {
        if let data = GroupUserDefaults.groupDefaults.object(forKey: UserDefaultsStore.Keys.daysFilter.rawValue) as? [Int] {
            return data
        } else {
            return [1,2,3,4,5,6,7]
        }
    }
}