import SwiftUI

struct MessageRow: View {
	let message: Message
	let senderName: String
	let isSelf: Bool
	let replyToName: String?
	let canDMSender: Bool
	let onReply: () -> Void
	let onReact: (String) -> Void
	let onDMSender: () -> Void

	static let reactionEmojis = ["👋", "👍", "❤️", "😂", "😮", "😢", "🙏"]

	private static let timeFmt: DateFormatter = {
		let f = DateFormatter()
		f.dateFormat = "HH:mm"
		return f
	}()

	var body: some View {
		HStack {
			if isSelf { Spacer(minLength: 40) }
			VStack(alignment: isSelf ? .trailing : .leading, spacing: 2) {
				header
				bubble
					.contextMenu { menuContent }
			}
			if !isSelf { Spacer(minLength: 40) }
		}
	}

	private var header: some View {
		HStack(spacing: 6) {
			if !isSelf {
				Text(senderName)
					.font(.caption.weight(.semibold))
					.foregroundStyle(.tint)
			}
			Text(Self.timeFmt.string(from: message.timestamp))
				.font(.caption2)
				.foregroundStyle(.secondary)
			if isSelf {
				Text(senderName)
					.font(.caption.weight(.semibold))
					.foregroundStyle(.tint)
			}
		}
	}

	private var bubble: some View {
		HStack(alignment: .bottom, spacing: 4) {
			VStack(alignment: .leading, spacing: 3) {
				if let name = replyToName {
					HStack(spacing: 3) {
						Image(systemName: "arrowshape.turn.up.left.fill")
							.font(.caption2)
						Text(name).font(.caption.weight(.semibold))
					}
					.foregroundStyle(isSelf ? Color.white.opacity(0.85) : Color.secondary)
				}
				Text(message.text ?? "")
					.font(.body)
					.foregroundStyle(isSelf ? .white : .primary)
			}
			.padding(.horizontal, 12)
			.padding(.vertical, 8)
			.background(
				RoundedRectangle(cornerRadius: 14, style: .continuous)
					.fill(isSelf
						  ? AnyShapeStyle(Color.accentColor)
						  : AnyShapeStyle(Color(.systemGray5)))
			)
			if isSelf, message.delivery != .none {
				Image(systemName: message.delivery.icon)
					.font(.caption2)
					.foregroundStyle(deliveryColor)
			}
		}
	}

	@ViewBuilder
	private var menuContent: some View {
		Menu("React", systemImage: "face.smiling") {
			ForEach(Self.reactionEmojis, id: \.self) { e in
				Button {
					onReact(e)
				} label: {
					Text(e)
				}
			}
		}
		Button {
			onReply()
		} label: {
			Label("Reply", systemImage: "arrowshape.turn.up.left")
		}
		if canDMSender {
			Button {
				onDMSender()
			} label: {
				Label("Message \(senderName)", systemImage: "bubble.left.and.bubble.right")
			}
		}
	}

	private var deliveryColor: Color {
		switch message.delivery {
		case .confirmed: return .green
		case .failed: return .red
		case .pending: return .gray
		case .none: return .clear
		}
	}
}