//
//  SharedModelContainer.swift
//  Feels
//
//  Factory for creating ModelContainer shared between main app and widget extension.
//

import Foundation
import SwiftData

enum SharedModelContainer {
    /// Creates a ModelContainer with the appropriate configuration for app group sharing
    /// - Parameter useCloudKit: Whether to enable CloudKit sync
    /// - Returns: Configured ModelContainer
    static func create(useCloudKit: Bool = false) -> ModelContainer {
        let schema = Schema([MoodEntryModel.self])
        let storeURL = Self.storeURL

        let configuration: ModelConfiguration
        if useCloudKit {
            // CloudKit-enabled configuration
            configuration = ModelConfiguration(
                schema: schema,
                url: storeURL,
                cloudKitDatabase: .private(cloudKitContainerID)
            )
        } else {
            // Local-only configuration
            configuration = ModelConfiguration(
                schema: schema,
                url: storeURL,
                cloudKitDatabase: .none
            )
        }

        do {
            return try ModelContainer(for: schema, configurations: [configuration])
        } catch {
            fatalError("Failed to create ModelContainer: \(error)")
        }
    }

    /// The URL for the SwiftData store in the shared app group container
    static var storeURL: URL {
        guard let containerURL = FileManager.default.containerURL(
            forSecurityApplicationGroupIdentifier: appGroupID
        ) else {
            fatalError("App Group container not available for: \(appGroupID)")
        }
        return containerURL.appendingPathComponent(storeFileName)
    }

    /// App Group identifier based on build configuration
    static var appGroupID: String {
        #if DEBUG
        return Constants.groupShareIdDebug
        #else
        return Constants.groupShareId
        #endif
    }

    /// CloudKit container identifier based on build configuration
    static var cloudKitContainerID: String {
        #if DEBUG
        return "iCloud.com.tt.ifeelDebug"
        #else
        return "iCloud.com.tt.ifeel"
        #endif
    }

    /// Store file name based on build configuration
    static var storeFileName: String {
        #if DEBUG
        return "Feels-Debug.store"
        #else
        return "Feels.store"
        #endif
    }
}