//
//  CloudDriveDetailSheetViewController.swift
//  suixinkan
//

import SnapKit
import UIKit

/// 云盘文件详情底部表单，用于查看文件信息并修改名称。
final class CloudDriveDetailSheetViewController: UIViewController {
    private let file: CloudFile
    private let onSave: (String) -> Void
    private let dimView = UIView()
    private let panelView = UIView()
    private let titleLabel = UILabel()
    private let nameTitleLabel = UILabel()
    private let nameField = UITextField()
    private let infoLabel = UILabel()
    private let cancelButton = UIButton(type: .system)
    private let saveButton = UIButton(type: .system)

    /// 初始化云盘文件详情表单。
    init(file: CloudFile, onSave: @escaping (String) -> Void) {
        self.file = file
        self.onSave = onSave
        super.init(nibName: nil, bundle: nil)
        modalPresentationStyle = .overFullScreen
        modalTransitionStyle = .crossDissolve
    }

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

    override func viewDidLoad() {
        super.viewDidLoad()
        setupUI()
        setupConstraints()
    }

    private func setupUI() {
        view.backgroundColor = .clear
        dimView.backgroundColor = UIColor.black.withAlphaComponent(0.35)
        dimView.addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(cancelTapped)))

        panelView.backgroundColor = .white
        panelView.layer.cornerRadius = 18
        panelView.layer.maskedCorners = [.layerMinXMinYCorner, .layerMaxXMinYCorner]
        panelView.clipsToBounds = true

        titleLabel.text = "详情"
        titleLabel.font = .app(.bodyMedium)
        titleLabel.textColor = AppColor.textPrimary
        titleLabel.textAlignment = .center

        nameTitleLabel.text = "文件名称"
        nameTitleLabel.font = .app(.caption)
        nameTitleLabel.textColor = AppColor.textSecondary

        nameField.text = file.name
        nameField.font = .app(.body)
        nameField.textColor = AppColor.textPrimary
        nameField.clearButtonMode = .whileEditing
        nameField.returnKeyType = .done
        nameField.delegate = self
        nameField.backgroundColor = AppColor.inputBackground
        nameField.layer.cornerRadius = AppRadius.xs
        nameField.leftView = UIView(frame: CGRect(x: 0, y: 0, width: AppSpacing.sm, height: 1))
        nameField.leftViewMode = .always

        infoLabel.text = "\(file.createdAt) | \(CloudDriveFormatter.fileSize(file.fileSize))\n类型：\(CloudDriveFormatter.typeName(file.type))"
        infoLabel.font = .app(.caption)
        infoLabel.textColor = AppColor.textTertiary
        infoLabel.numberOfLines = 0

        cancelButton.setTitle("取消", for: .normal)
        cancelButton.setTitleColor(AppColor.textSecondary, for: .normal)
        cancelButton.titleLabel?.font = .app(.body)
        cancelButton.addTarget(self, action: #selector(cancelTapped), for: .touchUpInside)

        saveButton.setTitle("保存", for: .normal)
        saveButton.setTitleColor(.white, for: .normal)
        saveButton.titleLabel?.font = .app(.bodyMedium)
        saveButton.backgroundColor = AppColor.primary
        saveButton.layer.cornerRadius = AppRadius.xs
        saveButton.addTarget(self, action: #selector(saveTapped), for: .touchUpInside)

        view.addSubview(dimView)
        view.addSubview(panelView)
        [titleLabel, nameTitleLabel, nameField, infoLabel, cancelButton, saveButton].forEach(panelView.addSubview)
    }

    private func setupConstraints() {
        dimView.snp.makeConstraints { make in
            make.edges.equalToSuperview()
        }
        panelView.snp.makeConstraints { make in
            make.leading.trailing.bottom.equalToSuperview()
        }
        titleLabel.snp.makeConstraints { make in
            make.top.leading.trailing.equalToSuperview()
            make.height.equalTo(54)
        }
        nameTitleLabel.snp.makeConstraints { make in
            make.top.equalTo(titleLabel.snp.bottom).offset(AppSpacing.sm)
            make.leading.trailing.equalToSuperview().inset(AppSpacing.md)
        }
        nameField.snp.makeConstraints { make in
            make.top.equalTo(nameTitleLabel.snp.bottom).offset(AppSpacing.xs)
            make.leading.trailing.equalTo(nameTitleLabel)
            make.height.equalTo(42)
        }
        infoLabel.snp.makeConstraints { make in
            make.top.equalTo(nameField.snp.bottom).offset(AppSpacing.md)
            make.leading.trailing.equalTo(nameTitleLabel)
        }
        cancelButton.snp.makeConstraints { make in
            make.top.equalTo(infoLabel.snp.bottom).offset(AppSpacing.lg)
            make.leading.equalToSuperview().offset(AppSpacing.md)
            make.height.equalTo(44)
            make.width.equalTo(saveButton)
            make.bottom.equalTo(view.safeAreaLayoutGuide).inset(AppSpacing.md)
        }
        saveButton.snp.makeConstraints { make in
            make.top.bottom.width.equalTo(cancelButton)
            make.leading.equalTo(cancelButton.snp.trailing).offset(AppSpacing.md)
            make.trailing.equalToSuperview().inset(AppSpacing.md)
        }
    }

    @objc private func cancelTapped() {
        dismiss(animated: true)
    }

    @objc private func saveTapped() {
        let name = nameField.text ?? ""
        dismiss(animated: true) { [onSave] in
            onSave(name)
        }
    }
}

extension CloudDriveDetailSheetViewController: UITextFieldDelegate {
    func textFieldShouldReturn(_ textField: UITextField) -> Bool {
        textField.resignFirstResponder()
        return true
    }
}