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

import SnapKit
import UIKit

/// 摄影师邀请页。
final class PhotographerInviteViewController: UIViewController {
    private let services = AppServices.shared
    private let viewModel = PhotographerInviteViewModel()
    private let scrollView = UIScrollView()
    private let contentStack = UIStackView()
    private let codeLabel = UILabel()
    private let urlLabel = UILabel()
    private let qrImageView = UIImageView()
    private let rulesLabel = UILabel()
    private let activityIndicator = UIActivityIndicatorView(style: .medium)

    override func viewDidLoad() {
        super.viewDidLoad()
        title = "邀请摄影师"
        view.backgroundColor = UIColor(hex: 0xF5F7FA)
        setupUI()
        viewModel.onChange = { [weak self] in self?.render() }
        Task { await viewModel.reload(api: services.inviteAPI) }
    }

    private func setupUI() {
        navigationItem.rightBarButtonItems = [
            UIBarButtonItem(title: "复制码", style: .plain, target: self, action: #selector(copyCode)),
            UIBarButtonItem(title: "复制链接", style: .plain, target: self, action: #selector(copyURL))
        ]

        contentStack.axis = .vertical
        contentStack.spacing = 12
        scrollView.addSubview(contentStack)
        view.addSubview(scrollView)
        view.addSubview(activityIndicator)

        scrollView.snp.makeConstraints { $0.edges.equalToSuperview() }
        contentStack.snp.makeConstraints { make in
            make.edges.equalToSuperview().inset(16)
            make.width.equalTo(scrollView.snp.width).offset(-32)
        }
        activityIndicator.snp.makeConstraints { $0.center.equalToSuperview() }

        codeLabel.font = .systemFont(ofSize: 22, weight: .bold)
        urlLabel.font = .systemFont(ofSize: 14)
        urlLabel.numberOfLines = 0
        urlLabel.textColor = AppDesign.textSecondary
        qrImageView.contentMode = .scaleAspectFit
        qrImageView.snp.makeConstraints { $0.height.equalTo(220) }
        rulesLabel.numberOfLines = 0
        rulesLabel.font = .systemFont(ofSize: 14)
        rulesLabel.textColor = AppDesign.textSecondary

        contentStack.addArrangedSubview(codeLabel)
        contentStack.addArrangedSubview(urlLabel)
        contentStack.addArrangedSubview(qrImageView)
        contentStack.addArrangedSubview(rulesLabel)
    }

    private func render() {
        activityIndicator.isHidden = !viewModel.loading
        if viewModel.loading { activityIndicator.startAnimating() } else { activityIndicator.stopAnimating() }
        codeLabel.text = viewModel.inviteCode.isEmpty ? "邀请码加载中..." : "邀请码：\(viewModel.inviteCode)"
        urlLabel.text = viewModel.inviteUrl
        qrImageView.image = viewModel.qrImage
        rulesLabel.text = viewModel.rules.joined(separator: "\n")
        if let error = viewModel.errorMessage {
            rulesLabel.text = (rulesLabel.text ?? "") + "\n\n" + error
        }
    }

    @objc private func copyCode() { viewModel.copyInviteCode() }
    @objc private func copyURL() { viewModel.copyInviteUrl() }
}

extension PhotographerInviteViewModel: ViewModelBindable {}

/// 邀请记录页。
final class InviteRecordViewController: ModuleTableViewController {
    private let viewModel = InviteRecordViewModel()
    private let summaryLabel = UILabel()

    override func viewDidLoad() {
        title = "邀请记录"
        navigationItem.rightBarButtonItem = UIBarButtonItem(
            title: "奖励明细",
            style: .plain,
            target: self,
            action: #selector(toggleTab)
        )
        super.viewDidLoad()
        setupHeader()
        viewModel.onChange = { [weak self] in
            self?.updateSummary()
            self?.reloadTable()
        }
    }

    private func setupHeader() {
        summaryLabel.font = .systemFont(ofSize: 14)
        summaryLabel.textColor = AppDesign.textSecondary
        summaryLabel.numberOfLines = 0
        summaryLabel.textAlignment = .center
        summaryLabel.frame = CGRect(x: 0, y: 0, width: view.bounds.width, height: 56)
        tableView.tableHeaderView = summaryLabel
    }

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

    override func configureCell(_ cell: TitleSubtitleTableViewCell, at indexPath: IndexPath) {
        let row = viewModel.displayRows[indexPath.row]
        cell.configure(
            title: row.title,
            subtitle: row.subtitle,
            detail: row.amount.isEmpty ? row.time : "\(row.amount) · \(row.time)"
        )
    }

    override func reloadContent() async {
        await viewModel.reload(
            inviteAPI: services.inviteAPI,
            walletAPI: services.walletAPI,
            refresh: true
        )
        updateSummary()
    }

    private func updateSummary() {
        summaryLabel.text = "累计奖励 \(viewModel.totalRewardText) · 可提现 \(viewModel.withdrawableText)"
        navigationItem.rightBarButtonItem?.title = viewModel.tab == .invite ? "奖励明细" : "邀请用户"
    }

    @objc private func toggleTab() {
        Task {
            let next: InviteRecordTab = viewModel.tab == .invite ? .reward : .invite
            await viewModel.selectTab(next, inviteAPI: services.inviteAPI, walletAPI: services.walletAPI)
        }
    }
}