//
//  GroupMemberListView.swift
//  QuickLocation
//
//  Created by 八条 on 2026/6/29.
//

import UIKit

final class GroupMemberListView: UIView {

    private var sectionTitles: [String] = []

    override init(frame: CGRect) {
        super.init(frame: frame)
        backgroundColor = UIColor(hexStr: "#F7F7F8")
        setupUI()
    }

    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }

    func updateSectionTitles(_ titles: [String]) {
        sectionTitles = titles
    }

    func updateSearchPlaceholder(isHidden: Bool) {
        searchPlaceholderStack.isHidden = isHidden
    }

    private func setupUI() {
        addSubview(navView)
        addSubview(searchField)
        addSubview(tableView)
        searchField.addSubview(searchPlaceholderStack)

        [navView, searchField, tableView, searchPlaceholderStack].forEach {
            $0.translatesAutoresizingMaskIntoConstraints = false
        }

        NSLayoutConstraint.activate([
            navView.topAnchor.constraint(equalTo: topAnchor),
            navView.leadingAnchor.constraint(equalTo: leadingAnchor),
            navView.trailingAnchor.constraint(equalTo: trailingAnchor),
            navView.heightAnchor.constraint(equalToConstant: kNaviHeight),

            searchField.topAnchor.constraint(equalTo: navView.bottomAnchor, constant: 20),
            searchField.leadingAnchor.constraint(equalTo: leadingAnchor, constant: 15),
            searchField.trailingAnchor.constraint(equalTo: trailingAnchor, constant: -15),
            searchField.heightAnchor.constraint(equalToConstant: 38),

            searchPlaceholderStack.centerXAnchor.constraint(equalTo: searchField.centerXAnchor),
            searchPlaceholderStack.centerYAnchor.constraint(equalTo: searchField.centerYAnchor),

            tableView.topAnchor.constraint(equalTo: searchField.bottomAnchor, constant: 20),
            tableView.leadingAnchor.constraint(equalTo: leadingAnchor),
            tableView.trailingAnchor.constraint(equalTo: trailingAnchor),
            tableView.bottomAnchor.constraint(equalTo: bottomAnchor)
        ])
    }

    lazy var navView: BaseNavigationView = BaseNavigationView(title: "圈子成员")

    lazy var searchField: UISearchTextField = {
        let textField = UISearchTextField()
        textField.backgroundColor = .white
        textField.borderStyle = .none
        textField.layer.cornerRadius = 12
        textField.clipsToBounds = true
        textField.font = .systemFont(ofSize: 15, weight: .regular)
        textField.textColor = UIColor(hexStr: "#293445")
        textField.tintColor = UIColor(hexStr: "#293445")
        textField.returnKeyType = .search
        textField.clearButtonMode = .whileEditing
        textField.leftView = UIView(frame: .zero)
        textField.leftViewMode = .never
        return textField
    }()

    private lazy var searchPlaceholderStack: UIStackView = {
        let imageView = UIImageView(image: UIImage(named: "Group/remove_member_search"))
        imageView.contentMode = .scaleAspectFit
        imageView.widthAnchor.constraint(equalToConstant: 16).isActive = true
        imageView.heightAnchor.constraint(equalToConstant: 16).isActive = true

        let label = UILabel()
        label.text = "搜索"
        label.textColor = UIColor(hexStr: "#B0B0B5")
        label.font = .systemFont(ofSize: 15, weight: .regular)

        let stack = UIStackView(arrangedSubviews: [imageView, label])
        stack.axis = .horizontal
        stack.alignment = .center
        stack.spacing = 6
        stack.isUserInteractionEnabled = false
        return stack
    }()

    lazy var tableView: UITableView = {
        let view = UITableView(frame: .zero, style: .plain)
        view.backgroundColor = .clear
        view.separatorStyle = .none
        view.rowHeight = GroupMemberDirectoryCell.rowHeight
        view.estimatedRowHeight = GroupMemberDirectoryCell.rowHeight
        view.sectionHeaderHeight = 42
        view.estimatedSectionHeaderHeight = 42
        view.showsVerticalScrollIndicator = false
        view.keyboardDismissMode = .onDrag
        view.contentInset = UIEdgeInsets(top: 0, left: 0, bottom: kSafeBottomMargin + 24, right: 0)
        if #available(iOS 15.0, *) {
            view.sectionHeaderTopPadding = 0
        }
        view.register(GroupMemberDirectoryCell.self)
        return view
    }()
}

extension GroupMemberListView: UITableViewDelegate {
    func tableView(_ tableView: UITableView, viewForHeaderInSection section: Int) -> UIView? {
        guard section < sectionTitles.count else { return nil }

        let container = UIView()
        let label = UILabel()
        label.text = sectionTitles[section]
        label.textColor = UIColor(hexStr: "#777A80")
        label.font = .systemFont(ofSize: 14, weight: .regular)
        container.addSubview(label)
        label.translatesAutoresizingMaskIntoConstraints = false
        NSLayoutConstraint.activate([
            label.leadingAnchor.constraint(equalTo: container.leadingAnchor, constant: 16),
            label.bottomAnchor.constraint(equalTo: container.bottomAnchor, constant: -8)
        ])
        return container
    }

    func tableView(_ tableView: UITableView, heightForHeaderInSection section: Int) -> CGFloat {
        42
    }
}

final class GroupMemberDirectoryCell: UITableViewCell {

    static let rowHeight: CGFloat = 52

    override init(style: CellStyle, reuseIdentifier: String?) {
        super.init(style: style, reuseIdentifier: reuseIdentifier)
        selectionStyle = .none
        backgroundColor = .clear
        contentView.backgroundColor = .clear
        setupUI()
    }

    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }

    func configure(_ member: GroupMemberModel,
                   showsSeparator: Bool,
                   roundsTopCorners: Bool,
                   roundsBottomCorners: Bool) {
        avatarView.image = member.userIcon
        nicknameLabel.text = member.nick_name.isEmpty ? "未知昵称" : member.nick_name
        separatorView.isHidden = !showsSeparator

        var corners: CACornerMask = []
        if roundsTopCorners {
            corners.formUnion([.layerMinXMinYCorner, .layerMaxXMinYCorner])
        }
        if roundsBottomCorners {
            corners.formUnion([.layerMinXMaxYCorner, .layerMaxXMaxYCorner])
        }
        cardView.layer.maskedCorners = corners
    }

    private func setupUI() {
        contentView.addSubview(cardView)
        cardView.addSubview(avatarView)
        cardView.addSubview(nicknameLabel)
        cardView.addSubview(separatorView)

        [cardView, avatarView, nicknameLabel, separatorView].forEach {
            $0.translatesAutoresizingMaskIntoConstraints = false
        }

        NSLayoutConstraint.activate([
            cardView.topAnchor.constraint(equalTo: contentView.topAnchor),
            cardView.leadingAnchor.constraint(equalTo: contentView.leadingAnchor, constant: 15),
            cardView.trailingAnchor.constraint(equalTo: contentView.trailingAnchor, constant: -15),
            cardView.bottomAnchor.constraint(equalTo: contentView.bottomAnchor),

            avatarView.leadingAnchor.constraint(equalTo: cardView.leadingAnchor, constant: 16),
            avatarView.centerYAnchor.constraint(equalTo: cardView.centerYAnchor),
            avatarView.widthAnchor.constraint(equalToConstant: 38),
            avatarView.heightAnchor.constraint(equalToConstant: 38),

            nicknameLabel.leadingAnchor.constraint(equalTo: avatarView.trailingAnchor, constant: 12),
            nicknameLabel.trailingAnchor.constraint(equalTo: cardView.trailingAnchor, constant: -16),
            nicknameLabel.centerYAnchor.constraint(equalTo: cardView.centerYAnchor),

            separatorView.leadingAnchor.constraint(equalTo: cardView.leadingAnchor, constant: 20),
            separatorView.trailingAnchor.constraint(equalTo: cardView.trailingAnchor, constant: -13),
            separatorView.bottomAnchor.constraint(equalTo: cardView.bottomAnchor),
            separatorView.heightAnchor.constraint(equalToConstant: 0.5)
        ])
    }

    private lazy var cardView: UIView = {
        let view = UIView()
        view.backgroundColor = .white
        view.layer.cornerRadius = 12
        view.clipsToBounds = true
        return view
    }()

    private lazy var avatarView: UIImageView = {
        let view = UIImageView()
        view.backgroundColor = UIColor(hexStr: "#F1F2F4")
        view.contentMode = .scaleAspectFill
        view.layer.cornerRadius = 10
        view.clipsToBounds = true
        return view
    }()

    private lazy var nicknameLabel: UILabel = {
        let label = UILabel()
        label.textColor = UIColor(hexStr: "#111111")
        label.font = .systemFont(ofSize: 16, weight: .regular)
        label.lineBreakMode = .byTruncatingTail
        return label
    }()

    private lazy var separatorView: UIView = {
        let view = UIView()
        view.backgroundColor = UIColor(hexStr: "#EDEEF0")
        return view
    }()
}

// This compact cell is shared by the map and member information pages.
final class GroupMemberListCell: UICollectionViewCell {

    private static let sosBlinkKey = "sosBlink"

    override init(frame: CGRect) {
        super.init(frame: frame)
        setupUI()
    }

    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }

    override func prepareForReuse() {
        super.prepareForReuse()
        updateSOSBlink(false)
        bubbleImageView.isHidden = true
    }

    func configure(model: GroupMemberModel, isCurrentUser: Bool, isSelected: Bool) {
        avatarImageView.image = model.userIcon
        nameLabel.text = model.nick_name
        nameLabel.textColor = UIColor(hexStr: isCurrentUser ? "#16B3FF" : "#0F2846")
        selectionImageView.isHidden = !isSelected
        vipBackgroundView.isHidden = model.level == 1

        let isSOS = model.status == 1
        updateSOSBlink(isSOS)
        bubbleImageView.isHidden = isSOS || model.status != 2
    }

    private func updateSOSBlink(_ blinking: Bool) {
        sosImageView.layer.removeAnimation(forKey: Self.sosBlinkKey)
        sosImageView.isHidden = !blinking
        sosImageView.alpha = 1
        guard blinking else { return }

        let animation = CABasicAnimation(keyPath: "opacity")
        animation.fromValue = 1
        animation.toValue = 0.2
        animation.duration = 0.6
        animation.autoreverses = true
        animation.repeatCount = .infinity
        sosImageView.layer.add(animation, forKey: Self.sosBlinkKey)
    }

    private func setupUI() {
        contentView.addSubview(selectionImageView)
        contentView.addSubview(avatarImageView)
        contentView.addSubview(bubbleImageView)
        contentView.addSubview(sosImageView)
        contentView.addSubview(vipBackgroundView)
        contentView.addSubview(nameLabel)

        [selectionImageView, avatarImageView, bubbleImageView, sosImageView, vipBackgroundView, nameLabel].forEach {
            $0.translatesAutoresizingMaskIntoConstraints = false
        }

        NSLayoutConstraint.activate([
            selectionImageView.topAnchor.constraint(equalTo: contentView.topAnchor),
            selectionImageView.leadingAnchor.constraint(equalTo: contentView.leadingAnchor),
            selectionImageView.trailingAnchor.constraint(equalTo: contentView.trailingAnchor),
            selectionImageView.bottomAnchor.constraint(equalTo: contentView.bottomAnchor),

            avatarImageView.topAnchor.constraint(equalTo: contentView.topAnchor, constant: 9),
            avatarImageView.centerXAnchor.constraint(equalTo: contentView.centerXAnchor),
            avatarImageView.widthAnchor.constraint(equalToConstant: 50),
            avatarImageView.heightAnchor.constraint(equalToConstant: 50),

            bubbleImageView.topAnchor.constraint(equalTo: avatarImageView.topAnchor),
            bubbleImageView.leadingAnchor.constraint(equalTo: avatarImageView.leadingAnchor),
            bubbleImageView.trailingAnchor.constraint(equalTo: avatarImageView.trailingAnchor),
            bubbleImageView.bottomAnchor.constraint(equalTo: avatarImageView.bottomAnchor),

            sosImageView.topAnchor.constraint(equalTo: avatarImageView.topAnchor),
            sosImageView.leadingAnchor.constraint(equalTo: avatarImageView.leadingAnchor),
            sosImageView.trailingAnchor.constraint(equalTo: avatarImageView.trailingAnchor),
            sosImageView.bottomAnchor.constraint(equalTo: avatarImageView.bottomAnchor),

            vipBackgroundView.topAnchor.constraint(equalTo: contentView.topAnchor, constant: 7),
            vipBackgroundView.centerXAnchor.constraint(equalTo: contentView.centerXAnchor),

            nameLabel.topAnchor.constraint(equalTo: avatarImageView.bottomAnchor, constant: 7),
            nameLabel.leadingAnchor.constraint(equalTo: contentView.leadingAnchor),
            nameLabel.trailingAnchor.constraint(equalTo: contentView.trailingAnchor)
        ])
    }

    private lazy var selectionImageView: UIImageView = {
        let view = UIImageView(image: UIImage(named: "GroupMemberList/selected_bg"))
        view.contentMode = .scaleAspectFill
        view.isHidden = true
        return view
    }()

    private lazy var avatarImageView: UIImageView = {
        let view = UIImageView()
        view.backgroundColor = UIColor(hexStr: "#F1F2F4")
        view.contentMode = .scaleAspectFill
        view.layer.cornerRadius = 25
        view.clipsToBounds = true
        return view
    }()

    private lazy var bubbleImageView: UIImageView = {
        let view = UIImageView(image: UIImage(named: "GroupMemberList/bubble"))
        view.contentMode = .scaleAspectFit
        view.isHidden = true
        return view
    }()

    private lazy var sosImageView: UIImageView = {
        let view = UIImageView(image: UIImage(named: "GroupMemberList/sos"))
        view.contentMode = .scaleAspectFit
        view.isHidden = true
        return view
    }()

    private lazy var vipBackgroundView: UIImageView = {
        let view = UIImageView(image: UIImage(named: "GroupMemberList/vip"))
        view.isHidden = true
        return view
    }()

    private lazy var nameLabel: UILabel = {
        let label = UILabel()
        label.font = .systemFont(ofSize: 12, weight: .medium)
        label.textAlignment = .center
        label.lineBreakMode = .byTruncatingTail
        return label
    }()
}