import Foundation

// Shared between app and widget extension via App Group UserDefaults.
// Types are pure Codable — no UIKit / AppColors dependency.

struct WidgetDataStore {
    static let suiteName  = "group.com.kutesir.KisaniCal"
    static let tasksKey   = "kisani.widget.tasks"
    static let workoutKey = "kisani.widget.workout"

    // MARK: - Shared types

    struct WidgetTask: Codable, Identifiable {
        let id: UUID
        let title: String
        let dueDate: Date?
        let isToday: Bool
        let isOverdue: Bool
    }

    struct WidgetWorkout: Codable {
        let name: String
        let sectionsCount: Int
        let hasWorkoutToday: Bool
    }

    // MARK: - Write (app target)

    static func saveTasks(_ tasks: [WidgetTask]) {
        guard let data = try? JSONEncoder().encode(tasks),
              let ud   = UserDefaults(suiteName: suiteName) else { return }
        ud.set(data, forKey: tasksKey)
    }

    static func saveWorkout(_ workout: WidgetWorkout?) {
        guard let ud = UserDefaults(suiteName: suiteName) else { return }
        if let workout, let data = try? JSONEncoder().encode(workout) {
            ud.set(data, forKey: workoutKey)
        } else {
            ud.removeObject(forKey: workoutKey)
        }
    }

    // MARK: - Read (widget target)

    static func loadTasks() -> [WidgetTask] {
        guard let ud   = UserDefaults(suiteName: suiteName),
              let data = ud.data(forKey: tasksKey),
              let list = try? JSONDecoder().decode([WidgetTask].self, from: data)
        else { return [] }
        return list
    }

    static func loadWorkout() -> WidgetWorkout? {
        guard let ud      = UserDefaults(suiteName: suiteName),
              let data    = ud.data(forKey: workoutKey),
              let workout = try? JSONDecoder().decode(WidgetWorkout.self, from: data)
        else { return nil }
        return workout
    }
}