//
//  DailyNotificationCallbacks.swift
//  DailyNotificationPlugin
//
//  Created by Matthew Raymer on 2025-09-22
//  Copyright © 2025 TimeSafari. All rights reserved.
//

import Foundation
import Capacitor
import CoreData

/**
 * Callback management for iOS Daily Notification Plugin
 * Implements HTTP and local callback delivery with error handling
 * 
 * @author Matthew Raymer
 * @version 1.1.0
 * @created 2025-09-22 09:22:32 UTC
 */
extension DailyNotificationPlugin {
    
    // MARK: - Callback Management
    
    @objc func registerCallback(_ call: CAPPluginCall) {
        guard let name = call.getString("name"),
              let callbackConfig = call.getObject("callback") else {
            call.reject("Callback name and config required")
            return
        }
        
        print("DNP-PLUGIN: Registering callback: \(name)")
        
        do {
            try registerCallback(name: name, config: callbackConfig)
            call.resolve()
        } catch {
            print("DNP-PLUGIN: Failed to register callback: \(error)")
            call.reject("Callback registration failed: \(error.localizedDescription)")
        }
    }
    
    @objc func unregisterCallback(_ call: CAPPluginCall) {
        guard let name = call.getString("name") else {
            call.reject("Callback name required")
            return
        }
        
        print("DNP-PLUGIN: Unregistering callback: \(name)")
        
        do {
            try unregisterCallback(name: name)
            call.resolve()
        } catch {
            print("DNP-PLUGIN: Failed to unregister callback: \(error)")
            call.reject("Callback unregistration failed: \(error.localizedDescription)")
        }
    }
    
    @objc func getRegisteredCallbacks(_ call: CAPPluginCall) {
        Task {
            do {
                let callbacks = try await getRegisteredCallbacks()
                call.resolve(["callbacks": callbacks])
            } catch {
                print("DNP-PLUGIN: Failed to get registered callbacks: \(error)")
                call.reject("Callback retrieval failed: \(error.localizedDescription)")
            }
        }
    }
    
    // MARK: - Content Management
    
    @objc func getContentCache(_ call: CAPPluginCall) {
        Task {
            do {
                let cache = try await getContentCache()
                call.resolve(cache)
            } catch {
                print("DNP-PLUGIN: Failed to get content cache: \(error)")
                call.reject("Content cache retrieval failed: \(error.localizedDescription)")
            }
        }
    }
    
    @objc func clearContentCache(_ call: CAPPluginCall) {
        Task {
            do {
                try await clearContentCache()
                call.resolve()
            } catch {
                print("DNP-PLUGIN: Failed to clear content cache: \(error)")
                call.reject("Content cache clearing failed: \(error.localizedDescription)")
            }
        }
    }
    
    @objc func getContentHistory(_ call: CAPPluginCall) {
        Task {
            do {
                let history = try await getContentHistory()
                call.resolve(["history": history])
            } catch {
                print("DNP-PLUGIN: Failed to get content history: \(error)")
                call.reject("Content history retrieval failed: \(error.localizedDescription)")
            }
        }
    }
    
    // MARK: - Private Callback Implementation
    
    func fireCallbacks(eventType: String, payload: [String: Any]) async throws {
        // Callbacks persistence not implemented (Phase 2).
        // This method is intentionally a no-op until CoreData persistence is implemented.
        print("DNP-CALLBACKS: Callbacks persistence not implemented (Phase 2). No-op.")
    }
    
    private func deliverCallback(callback: Callback, eventType: String, payload: [String: Any]) async throws {
        guard let callbackId = callback.id,
              let kind = callback.kind else { return }
        
        let event = [
            "id": callbackId,
            "at": Date().timeIntervalSince1970,
            "type": eventType,
            "payload": payload
        ] as [String: Any]
        
        switch kind {
        case "http":
            try await deliverHttpCallback(callback: callback, event: event)
        case "local":
            try await deliverLocalCallback(callback: callback, event: event)
        default:
            print("DNP-CB-UNKNOWN: Unknown callback kind: \(kind)")
        }
    }
    
    private func deliverHttpCallback(callback: Callback, event: [String: Any]) async throws {
        guard let target = callback.target,
              let url = URL(string: target) else {
            throw NSError(domain: "DailyNotificationPlugin", code: 1, userInfo: [NSLocalizedDescriptionKey: "Invalid callback target"])
        }
        
        var request = URLRequest(url: url)
        request.httpMethod = "POST"
        request.setValue("application/json", forHTTPHeaderField: "Content-Type")
        request.httpBody = try JSONSerialization.data(withJSONObject: event)
        
        let (_, response) = try await URLSession.shared.data(for: request)
        
        guard let httpResponse = response as? HTTPURLResponse,
              httpResponse.statusCode == 200 else {
            throw NSError(domain: "DailyNotificationPlugin", code: 2, userInfo: [NSLocalizedDescriptionKey: "HTTP callback failed"])
        }
        
        print("DNP-CB-HTTP-SUCCESS: HTTP callback delivered to \(target)")
    }
    
    private func deliverLocalCallback(callback: Callback, event: [String: Any]) async throws {
        // Local callback implementation would go here
        print("DNP-CB-LOCAL: Local callback delivered for \(callback.id ?? "unknown")")
    }
    
    private func registerCallback(name: String, config: [String: Any]) throws {
        // Callbacks persistence not implemented (Phase 2).
        print("DNP-CALLBACKS: Callbacks persistence not implemented (Phase 2). No-op.")
    }
    
    private func unregisterCallback(name: String) throws {
        // Callbacks persistence not implemented (Phase 2).
        print("DNP-CALLBACKS: Callbacks persistence not implemented (Phase 2). No-op.")
    }
    
    private func getRegisteredCallbacks() async throws -> [String] {
        // Callbacks persistence not implemented (Phase 2). Returning [].
        print("DNP-CALLBACKS: Callbacks persistence not implemented (Phase 2). Returning [].")
        return []
    }
    
    private func getContentCache() async throws -> [String: Any] {
        // Callbacks persistence not implemented (Phase 2). Returning [].
        print("DNP-CALLBACKS: Callbacks persistence not implemented (Phase 2). Returning [].")
        return [:]
    }
    
    private func clearContentCache() async throws {
        // Callbacks persistence not implemented (Phase 2).
        print("DNP-CALLBACKS: Callbacks persistence not implemented (Phase 2). No-op.")
    }
    
    private func getContentHistory() async throws -> [[String: Any]] {
        // Callbacks persistence not implemented (Phase 2). Returning [].
        print("DNP-CALLBACKS: Callbacks persistence not implemented (Phase 2). Returning [].")
        return []
    }
    
    private func getHealthStatus() async throws -> [String: Any] {
        // Callbacks persistence not implemented (Phase 2). Returning simplified status.
        print("DNP-CALLBACKS: Callbacks persistence not implemented (Phase 2). Returning simplified status.")
        // Get next runs (simplified)
        let nextRuns = [Date().addingTimeInterval(3600).timeIntervalSince1970,
                       Date().addingTimeInterval(86400).timeIntervalSince1970]
        
        // Phase 1: Return simplified health status
        return [
            "nextRuns": nextRuns,
            "lastOutcomes": [],
            "cacheAgeMs": 0,
            "staleArmed": false,
            "queueDepth": 0,
            "circuitBreakers": [
                "total": 0,
                "open": 0,
                "failures": 0
            ],
            "performance": [
                "avgFetchTime": 0,
                "avgNotifyTime": 0,
                "successRate": 1.0
            ]
        ]
    }
}
