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

import SnapKit
import UIKit

private extension PunchPointItem {
    var displayAddress: String {
        region?.address ?? scenicSpotStr
    }
}

/// 打卡点列表页。
final class PunchPointListViewController: ModuleTableViewController {
    private let viewModel = PunchPointListViewModel()

    override func viewDidLoad() {
        title = "打卡点"
        navigationItem.rightBarButtonItem = UIBarButtonItem(
            title: "新建",
            style: .plain,
            target: self,
            action: #selector(createPunchPoint)
        )
        super.viewDidLoad()
        wireViewModel(viewModel) { }
    }

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

    override func configureCell(_ cell: TitleSubtitleTableViewCell, at indexPath: IndexPath) {
        let item = viewModel.items[indexPath.row]
        cell.configure(title: item.name, subtitle: item.displayAddress, detail: item.statusLabel)
    }

    override func didSelectTableRow(at indexPath: IndexPath) {
        let item = viewModel.items[indexPath.row]
        navigationController?.pushViewController(
            PunchPointDetailViewController(punchPointId: item.id, summary: item),
            animated: true
        )
    }

    override func reloadContent() async {
        await viewModel.reload(scenicId: services.currentScenicId, api: services.punchPointAPI)
    }

    @objc private func createPunchPoint() {
        navigationController?.pushViewController(PunchPointEditorViewController(punchPointId: nil), animated: true)
    }
}

extension PunchPointListViewModel: ViewModelBindable {}

/// 打卡点详情页。
final class PunchPointDetailViewController: ModuleTableViewController {
    private let punchPointId: Int
    private let summary: PunchPointItem?
    private let viewModel = PunchPointListViewModel()

    init(punchPointId: Int, summary: PunchPointItem?) {
        self.punchPointId = punchPointId
        self.summary = summary
        super.init(nibName: nil, bundle: nil)
    }

    @available(*, unavailable)
    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }

    override func viewDidLoad() {
        title = summary?.name ?? "打卡点详情"
        navigationItem.rightBarButtonItem = UIBarButtonItem(
            title: "二维码",
            style: .plain,
            target: self,
            action: #selector(showQR)
        )
        super.viewDidLoad()
        viewModel.onChange = { [weak self] in
            self?.title = self?.viewModel.selectedDetail?.name ?? self?.summary?.name
            self?.reloadTable()
        }
    }

    override func tableRowCount() -> Int {
        guard viewModel.selectedDetail != nil || summary != nil else { return 0 }
        return 4
    }

    override func configureCell(_ cell: TitleSubtitleTableViewCell, at indexPath: IndexPath) {
        let detail = viewModel.selectedDetail ?? summary
        guard let detail else { return }
        switch indexPath.row {
        case 0: cell.configure(title: "名称", subtitle: detail.name)
        case 1: cell.configure(title: "地址", subtitle: detail.displayAddress)
        case 2: cell.configure(title: "状态", subtitle: detail.statusLabel)
        default: cell.configure(title: "创建时间", subtitle: detail.createdAt)
        }
    }

    override func reloadContent() async {
        await viewModel.loadDetail(id: punchPointId, api: services.punchPointAPI)
    }

    @objc private func showQR() {
        guard let detail = viewModel.selectedDetail ?? summary else { return }
        navigationController?.pushViewController(
            PunchPointQRViewController(title: detail.name, qrURL: detail.mpQrcode),
            animated: true
        )
    }
}

/// 打卡点编辑页。
final class PunchPointEditorViewController: ModuleTableViewController {
    private let viewModel = PunchPointEditorViewModel()
    private let nameField = UITextField()
    private let punchPointId: Int?

    init(punchPointId: Int?) {
        self.punchPointId = punchPointId
        super.init(nibName: nil, bundle: nil)
    }

    @available(*, unavailable)
    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }

    override func viewDidLoad() {
        title = punchPointId == nil ? "新建打卡点" : "编辑打卡点"
        navigationItem.rightBarButtonItem = UIBarButtonItem(
            title: "保存",
            style: .done,
            target: self,
            action: #selector(save)
        )
        super.viewDidLoad()
        nameField.placeholder = "打卡点名称"
        nameField.borderStyle = .roundedRect
        nameField.frame = CGRect(x: 0, y: 0, width: view.bounds.width, height: 52)
        tableView.tableHeaderView = nameField
        wireViewModel(viewModel) { [weak self] in
            if self?.nameField.text?.isEmpty != false {
                self?.nameField.text = self?.viewModel.name
            }
        }
    }

    override func tableRowCount() -> Int { 1 }

    override func configureCell(_ cell: TitleSubtitleTableViewCell, at indexPath: IndexPath) {
        cell.configure(title: "地址", subtitle: viewModel.address)
    }

    override func reloadContent() async {
        guard let punchPointId else { return }
        if let detail = try? await services.punchPointAPI.punchPointInfo(id: punchPointId) {
            viewModel.apply(detail)
            nameField.text = viewModel.name
        }
    }

    @objc private func save() {
        viewModel.name = nameField.text ?? ""
        Task {
            let success = await viewModel.submit(
                scenicId: services.currentScenicId,
                api: services.punchPointAPI,
                uploadService: services.ossUploadService
            )
            if success { navigationController?.popViewController(animated: true) }
        }
    }
}

extension PunchPointEditorViewModel: ViewModelBindable {}

/// 打卡点二维码页。
final class PunchPointQRViewController: UIViewController {
    private let pageTitle: String
    private let qrURL: String

    init(title: String, qrURL: String) {
        pageTitle = title
        self.qrURL = qrURL
        super.init(nibName: nil, bundle: nil)
    }

    @available(*, unavailable)
    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }

    override func viewDidLoad() {
        super.viewDidLoad()
        title = pageTitle
        view.backgroundColor = UIColor(hex: 0xF5F7FA)

        let urlLabel = UILabel()
        urlLabel.text = qrURL
        urlLabel.numberOfLines = 0
        urlLabel.textAlignment = .center
        urlLabel.textColor = AppDesign.textSecondary
        view.addSubview(urlLabel)
        urlLabel.snp.makeConstraints { make in
            make.center.equalToSuperview()
            make.leading.trailing.equalToSuperview().inset(24)
        }
    }
}