//
//  RelationSelectPopVC.swift
//  QuickLocation
//

import UIKit

final class RelationSelectPopVC: DLCustomPopVC {

    var onConfirm: ((String) -> Void)?

    private var selectedIdx: String
    private let items: [RelationModel]
    private var chipButtons: [UIButton] = []

    init(currentIdx: String, onConfirm: ((String) -> Void)? = nil) {
        self.selectedIdx = currentIdx
        self.items = RelationStore.shared.list
        self.onConfirm = onConfirm
        super.init(nibName: nil, bundle: nil)
        popStyle = .bottom
        bottomCornerRadius = 40
        dimmingClick = true
    }

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

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

    private func setupUI() {
        let headerBgImage = UIImageView()
        headerBgImage.image = UIImage(named: "Common/popup_header_bg")
        headerBgImage.contentMode = .scaleToFill
        headerBgImage.isUserInteractionEnabled = false
        contentView.addSubview(headerBgImage)
        headerBgImage.layoutChain
            .top()
            .edgesHorzontal()
            .heightToWidth(120 / 375)

        let titleLab = UILabel()
        titleLab.text = "关系设置"
        titleLab.font = .systemFont(ofSize: 18, weight: .semibold)
        titleLab.textColor = UIColor(hexStr: "#293445")
        contentView.addSubview(titleLab)
        titleLab.layoutChain.top(22).centerX()

        let closeBtn = UIButton(type: .custom)
        closeBtn.setImage(UIImage(named: "MemberInfo/close_circle"), for: .normal)
        closeBtn.addTarget(self, action: #selector(close), for: .touchUpInside)
        contentView.addSubview(closeBtn)
        closeBtn.layoutChain.right(16).centerY(titleLab).width(28).height(28)

        let columns = 5
        let rows = max(1, Int(ceil(Double(max(items.count, 1)) / Double(columns))))
        let chipHeight: CGFloat = 36
        let rowSpacing: CGFloat = 8
        let gridHeight = CGFloat(rows) * chipHeight + CGFloat(max(0, rows - 1)) * rowSpacing

        let grid = UIStackView()
        grid.axis = .vertical
        grid.spacing = rowSpacing
        grid.distribution = .fillEqually
        contentView.addSubview(grid)
        grid.layoutChain
            .topToBottomOfView(titleLab, offset: 24)
            .left(16)
            .right(16)
            .height(gridHeight)

        for row in 0..<rows {
            let rowStack = UIStackView()
            rowStack.axis = .horizontal
            rowStack.spacing = 8
            rowStack.distribution = .fillEqually
            rowStack.alignment = .fill
            for col in 0..<columns {
                let index = row * columns + col
                if items.indices.contains(index) {
                    let chip = makeChip(items[index], tag: index)
                    chipButtons.append(chip)
                    rowStack.addArrangedSubview(chip)
                } else {
                    rowStack.addArrangedSubview(UIView())
                }
            }
            grid.addArrangedSubview(rowStack)
        }

        let confirm = UIButton(type: .custom)
        confirm.setTitle("确 定", for: .normal)
        confirm.setTitleColor(.white, for: .normal)
        confirm.titleLabel?.font = FontManager.boboBold(18)
        confirm.setBackgroundImage(UIImage(named: "Common/button_bg_2"), for: .normal)
        confirm.layer.cornerRadius = 20
        confirm.clipsToBounds = true
        confirm.addTarget(self, action: #selector(confirmTapped), for: .touchUpInside)
        contentView.addSubview(confirm)
        confirm.layoutChain
            .topToBottomOfView(grid, offset: 22)
            .left(30)
            .right(30)
            .height(50)
            .bottom(16 + kSafeBottomMargin)

        let height = 22 + 28 + 24 + gridHeight + 22 + 50 + 16 + kSafeBottomMargin
        contentBgView.layoutChain.height(height)
        contentView.layoutChain.height(height)
        view.layoutIfNeeded()
    }

    private func makeChip(_ item: RelationModel, tag: Int) -> UIButton {
        let button = UIButton(type: .custom)
        button.tag = tag
        button.layer.cornerRadius = 18
        button.clipsToBounds = true
        button.titleLabel?.font = .systemFont(ofSize: 13, weight: .medium)
        button.addTarget(self, action: #selector(tapChip(_:)), for: .touchUpInside)
        if item.showsHeart {
            let heart = UIImage(named: "Mine/name_heart")?.withRenderingMode(.alwaysOriginal)
            button.setImage(heart, for: .normal)
            button.setTitle(" \(item.name)", for: .normal)
            button.imageView?.contentMode = .scaleAspectFit
            button.imageEdgeInsets = UIEdgeInsets(top: 0, left: -2, bottom: 0, right: 2)
        } else {
            button.setTitle(item.name, for: .normal)
        }
        return button
    }

    private func refreshSelection() {
        for (index, button) in chipButtons.enumerated() {
            guard items.indices.contains(index) else { continue }
            let selected = items[index].idx == selectedIdx
            button.backgroundColor = selected ? UIColor(hexStr: "#16B3FF") : .white
            button.setTitleColor(selected ? .white : UIColor(hexStr: "#293445"), for: .normal)
            button.layer.borderWidth = selected ? 0 : 1
            button.layer.borderColor = UIColor(hexStr: "#E8EEF2").cgColor
        }
    }

    @objc private func tapChip(_ sender: UIButton) {
        guard items.indices.contains(sender.tag) else { return }
        selectedIdx = items[sender.tag].idx
        refreshSelection()
    }

    @objc private func confirmTapped() {
        guard !selectedIdx.isEmpty else {
            DLToast.show(text: "请选择关系")
            return
        }
        let idx = selectedIdx
        dismiss(animated: true) { [weak self] in
            self?.onConfirm?(idx)
        }
    }

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