//
//  MessageCenterViewController.swift
//  suixinkan
//
//  Created by Codex on 2026/6/26.
//

import UIKit

/// 消息中心列表页。
final class MessageCenterViewController: ModuleTableViewController {
    private let viewModel = MessageCenterViewModel()

    override func viewDidLoad() {
        title = "消息中心"
        navigationItem.rightBarButtonItem = UIBarButtonItem(
            title: "全部已读",
            style: .plain,
            target: self,
            action: #selector(markAllRead)
        )
        super.viewDidLoad()
        wireViewModel(viewModel) { [weak self] in self?.updateBarButtons() }
    }

    override func tableRowCount() -> Int {
        viewModel.messages.count
    }

    override func configureCell(_ cell: TitleSubtitleTableViewCell, at indexPath: IndexPath) {
        let item = viewModel.messages[indexPath.row]
        cell.configure(
            title: item.title,
            subtitle: item.detail,
            detail: item.isRead ? item.time : "未读 · \(item.time)"
        )
        cell.accessoryType = item.isRead ? .none : .disclosureIndicator
    }

    override func didSelectTableRow(at indexPath: IndexPath) {
        let item = viewModel.messages[indexPath.row]
        Task {
            try? await viewModel.markAsRead(api: services.messageCenterAPI, item: item)
            showAlert(title: item.title, message: item.detail)
        }
    }

    override func reloadContent() async {
        isLoading = viewModel.messages.isEmpty
        await viewModel.reloadFirstPage(api: services.messageCenterAPI)
        isLoading = false
    }

    @objc private func markAllRead() {
        Task { try? await viewModel.markAllAsRead(api: services.messageCenterAPI) }
    }

    private func updateBarButtons() {
        navigationItem.rightBarButtonItem?.isEnabled = viewModel.unreadCount > 0 && !viewModel.messages.isEmpty
    }

    private func showAlert(title: String, message: String) {
        let alert = UIAlertController(title: title, message: message, preferredStyle: .alert)
        alert.addAction(UIAlertAction(title: "知道了", style: .default))
        present(alert, animated: true)
    }
}

extension MessageCenterViewModel: ViewModelBindable {}