//
//  MusadaqLiveActivityBundle.swift
//  MusadaqLiveActivity
//
//  Created by Hamza Aleghwairyeen on 07/05/2026.
//

import WidgetKit
import SwiftUI
import ActivityKit

// ─── 1. Data Model ───────────────────────────────────
//
// Must stay identical to InvoiceBatchAttributes in Runner/AppDelegate.swift and
// to the "content-state" keys the server sends in
// NotificationService::dispatchLiveActivityUpdate(). A mismatch makes iOS drop
// the update silently.
struct InvoiceBatchAttributes: ActivityAttributes {
    public struct ContentState: Codable, Hashable {
        var current: Int
        var total: Int
        var isDone: Bool
        var failed: Int = 0
        var statusText: String = ""
    }
    var companyName: String
}

// ─── 2. Bundle ───────────────────────────────────────
@main
struct MusadaqLiveActivityBundle: WidgetBundle {
    var body: some Widget {
        InvoiceBatchLiveActivity()
    }
}

// ─── 3. Copy helpers ─────────────────────────────────
// A partially failed batch must not read as a clean success.
private func headline(for state: InvoiceBatchAttributes.ContentState) -> String {
    if state.isDone {
        if state.failed > 0 && state.current > 0 { return "⚠️ اكتمل مع أخطاء" }
        if state.failed > 0 { return "❌ فشلت المعالجة" }
        return "✅ تم بنجاح"
    }
    return state.statusText.isEmpty
        ? "مُصادَق — جارٍ الرفع..."
        : "مُصادَق — \(state.statusText)"
}

private func subtitle(for state: InvoiceBatchAttributes.ContentState, company: String) -> String {
    var text = "\(state.current) / \(state.total) فاتورة"
    if state.failed > 0 {
        text += " — \(state.failed) فاشلة"
    }
    if !company.isEmpty {
        text += " — \(company)"
    }
    return text
}

// ─── 4. Widget ───────────────────────────────────────
struct InvoiceBatchLiveActivity: Widget {
    var body: some WidgetConfiguration {
        ActivityConfiguration(for: InvoiceBatchAttributes.self) { context in
            // Lock Screen UI
            ZStack {
                Color(red: 0.043, green: 0.098, blue: 0.161) // #0B1929
                HStack(spacing: 12) {
                    Image(systemName: context.state.isDone
                          ? "checkmark.doc.fill" : "arrow.up.doc.fill")
                        .foregroundColor(Color(red: 0.831, green: 0.659, blue: 0.263)) // #D4A843
                        .font(.title2)
                    VStack(alignment: .leading, spacing: 4) {
                        Text(headline(for: context.state))
                            .font(.caption.bold())
                            .foregroundColor(.white)
                        ProgressView(
                            value: Double(context.state.current + context.state.failed),
                            total: Double(max(context.state.total, 1))
                        )
                        .tint(context.state.failed > 0
                              ? Color(red: 0.96, green: 0.62, blue: 0.04)
                              : Color(red: 0.831, green: 0.659, blue: 0.263))
                        Text(subtitle(for: context.state, company: context.attributes.companyName))
                            .font(.caption2)
                            .foregroundColor(.gray)
                    }
                }
                .padding()
            }
        } dynamicIsland: { context in
            DynamicIsland {
                DynamicIslandExpandedRegion(.leading) {
                    Image(systemName: "arrow.up.doc.fill")
                        .foregroundColor(Color(red: 0.831, green: 0.659, blue: 0.263))
                }
                DynamicIslandExpandedRegion(.trailing) {
                    Text("\(context.state.current)/\(context.state.total)")
                        .font(.caption.bold()).foregroundColor(.white)
                }
                DynamicIslandExpandedRegion(.bottom) {
                    // Divide-by-zero guard: total arrives as 0 if a push lands
                    // before the first image is registered.
                    ProgressView(value: Double(context.state.current + context.state.failed),
                                 total: Double(max(context.state.total, 1)))
                        .tint(Color(red: 0.831, green: 0.659, blue: 0.263))
                }
            } compactLeading: {
                Image(systemName: "arrow.up.doc.fill")
                    .foregroundColor(Color(red: 0.831, green: 0.659, blue: 0.263))
                    .font(.caption)
            } compactTrailing: {
                Text("\(context.state.current)/\(context.state.total)")
                    .font(.caption2.bold()).foregroundColor(.white)
            } minimal: {
                Image(systemName: "arrow.up.doc.fill")
                    .foregroundColor(Color(red: 0.831, green: 0.659, blue: 0.263))
            }
        }
    }
}