//
//  SettingsViewControllers.swift
//  suixinkan
//

import SnapKit
import UIKit
import WebKit

/// 设置中心页面。
final class SettingsViewController: UIViewController {

    private var copiedDownloadLink = false

    private lazy var tableView: UITableView = {
        let table = UITableView(frame: .zero, style: .insetGrouped)
        table.dataSource = self
        table.delegate = self
        return table
    }()

    private let rows: [(title: String, action: SettingsRowAction)] = [
        ("关于我们", .agreement(.about)),
        ("系统版本", .version),
        ("App下载", .download),
        ("用户协议", .agreement(.userAgreement)),
        ("隐私政策", .agreement(.privacyPolicy))
    ]

    private enum SettingsRowAction {
        case agreement(AgreementPage)
        case version
        case download
    }

    override func viewDidLoad() {
        super.viewDidLoad()
        title = "设置"
        view.addSubview(tableView)
        tableView.snp.makeConstraints { make in make.edges.equalToSuperview() }
    }

    private var downloadLink: String {
        APIEnvironment.current.baseURL.appending(path: "/h5/app/download").absoluteString
    }

    private func copyDownloadLink() {
        UIPasteboard.general.string = downloadLink
        copiedDownloadLink = true
        showToast("下载链接已复制")
        tableView.reloadRows(at: [IndexPath(row: 2, section: 0)], with: .none)
        DispatchQueue.main.asyncAfter(deadline: .now() + 1.5) { [weak self] in
            self?.copiedDownloadLink = false
            self?.tableView.reloadRows(at: [IndexPath(row: 2, section: 0)], with: .none)
        }
    }
}

extension SettingsViewController: UITableViewDataSource, UITableViewDelegate {
    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int { rows.count }

    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = UITableViewCell(style: .value1, reuseIdentifier: nil)
        let row = rows[indexPath.row]
        cell.textLabel?.text = row.title
        cell.textLabel?.textColor = UIColor(hex: 0x4B5563)
        switch row.action {
        case .version:
            cell.detailTextLabel?.text = SettingsDisplayPolicy.versionText()
            cell.selectionStyle = .none
        case .download:
            cell.detailTextLabel?.text = copiedDownloadLink ? "已复制" : "复制链接"
            cell.detailTextLabel?.textColor = AppDesignUIKit.primary
        case .agreement:
            cell.accessoryType = .disclosureIndicator
        }
        return cell
    }

    func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
        tableView.deselectRow(at: indexPath, animated: true)
        switch rows[indexPath.row].action {
        case .agreement(let page):
            HomeMenuRouting.pushProfile(.agreement(page), from: self)
        case .download:
            copyDownloadLink()
        case .version:
            break
        }
    }

    func tableView(_ tableView: UITableView, titleForFooterInSection section: Int) -> String? {
        "Copyright © 2025 All Rights Reserved\n苏ICP备2025157647号"
    }
}

/// 协议 H5 页面。
final class AgreementViewController: UIViewController {

    private let page: AgreementPage
    private let webView = WKWebView(frame: .zero)
    private let loadingIndicator = UIActivityIndicatorView(style: .large)

    init(page: AgreementPage) {
        self.page = page
        super.init(nibName: nil, bundle: nil)
    }

    @available(*, unavailable)
    required init?(coder: NSCoder) { fatalError() }

    override func viewDidLoad() {
        super.viewDidLoad()
        title = page.title
        view.backgroundColor = AppDesignUIKit.pageBackground
        webView.navigationDelegate = self
        view.addSubview(webView)
        view.addSubview(loadingIndicator)
        webView.snp.makeConstraints { make in make.edges.equalToSuperview() }
        loadingIndicator.snp.makeConstraints { make in make.center.equalToSuperview() }
        loadingIndicator.startAnimating()
        webView.load(URLRequest(url: page.url))
    }
}

extension AgreementViewController: WKNavigationDelegate {
    func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) {
        loadingIndicator.stopAnimating()
    }

    func webView(_ webView: WKWebView, didFail navigation: WKNavigation!, withError error: Error) {
        loadingIndicator.stopAnimating()
        showToast(error.localizedDescription)
    }
}