//
//  LNJoinUsInputPhoneView.swift
//  Gami
//
//  Created by OneeChan on 2026/1/19.
//

import Foundation
import UIKit
import SnapKit


protocol LNJoinUsInputPhoneViewDelegate: AnyObject {
    func joinUsInputPhoneView(view: LNJoinUsInputPhoneView, didFinished code: String, phone: String)
}


class LNJoinUsInputPhoneView: UIView {
    private let countryIcon = UIImageView()
    private let countryCodeLabel = UILabel()
    private let phoneInputView = LNTextField()
    
    private let confirmButton = UIButton()
    
    private var sections: [(code: String, list: [LNCountryCodeVO])] = []
    
    weak var delegate: LNJoinUsInputPhoneViewDelegate?
    
    override init(frame: CGRect) {
        super.init(frame: frame)
        
        setupViews()
        
        LNEventDeliver.addObserver(self)
        loadCountryCodeList()
    }
    
    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
}

extension LNJoinUsInputPhoneView {
    private func loadCountryCodeList() {
        LNConfigManager.shared.getCountryCodeList { [weak self] list in
            guard let self else { return }
            guard let list else { return }
            
            sortList(list)
        }
    }
    
    private func sortList(_ list: [LNCountryCodeVO]) {
        sections.removeAll()
        
        var map: [String: [LNCountryCodeVO]] = [:]
        for item in list {
            let first = item.name.classificationFirstLetter
            var section = map[first] ?? []
            section.append(item)
            map[first] = section
        }
        
        let keys = map.keys.sorted()
        for key in keys {
            sections.append((key, map[key]) as! (code: String, list: [LNCountryCodeVO]))
        }
        
        var item: LNCountryCodeVO? = list.first {
            $0.code == LNAppConfig.shared.curLang.countryCode
        }
        if item == nil {
            item = list.first {
                $0.code == LNAppLanguage.indonesian.countryCode
            }
        }
        if let item {
            countryIcon.sd_setImage(with: URL(string: item.icon))
            countryCodeLabel.text = item.num
        }
    }
}

extension LNJoinUsInputPhoneView: LNProfileManagerNotify {
    func onBindPhoneCaptchaCoolDownChanged(time: Int) {
        let text: String = if time == 0 {
            .init(key: "B00023")
        } else {
            .init(key: "B00023") + " (\(time)s)"
        }
        confirmButton.setTitle(text, for: .normal)
        checkConfirmButton()
    }
}

extension LNJoinUsInputPhoneView {
    private func checkConfirmButton() {
        let text = phoneInputView.text ?? ""
        confirmButton.isEnabled = !text.isEmpty && LNProfileManager.shared.canSendCaptcha
    }
    
    private func setupViews() {
        onTap { [weak self] in
            guard let self else { return }
            endEditing(true)
        }
        
        let titleLabel = UILabel()
        titleLabel.font = .heading_h2
        titleLabel.textColor = .text_5
        titleLabel.text = .init(key: "B00035")
        titleLabel.textAlignment = .center
        addSubview(titleLabel)
        titleLabel.snp.makeConstraints { make in
            make.horizontalEdges.equalToSuperview().inset(16)
            make.top.equalToSuperview().offset(26)
        }
        
        let phoneInput = buildPhoneInput()
        addSubview(phoneInput)
        phoneInput.snp.makeConstraints { make in
            make.horizontalEdges.equalToSuperview().inset(22)
            make.top.equalTo(titleLabel.snp.bottom).offset(30)
        }
        
        let confirm = buildConfirmButton()
        addSubview(confirm)
        confirm.snp.makeConstraints { make in
            make.horizontalEdges.equalToSuperview().inset(22)
            make.top.equalTo(phoneInput.snp.bottom).offset(24)
        }
    }
    
    private func buildPhoneInput() -> UIView {
        let container = UIView()
        container.backgroundColor = .fill_2
        container.layer.cornerRadius = 26
        container.snp.makeConstraints { make in
            make.height.equalTo(52)
        }
        
        let countryView = UIView()
        countryView.onTap { [weak self] in
            guard let self else { return }
            guard !sections.isEmpty else { return }
            
            let panel = LNCountrySelectPanel()
            panel.containerHeight = .height(superview!.bounds.height)
            panel.update(sections)
            panel.handler = { [weak self] item in
                guard let self else { return }
                countryIcon.sd_setImage(with: URL(string: item.icon))
                countryCodeLabel.text = item.num
            }
            panel.popup()
        }
        container.addSubview(countryView)
        countryView.snp.makeConstraints { make in
            make.verticalEdges.equalToSuperview()
            make.leading.equalToSuperview()
        }
        
        countryIcon.layer.cornerRadius = 12
        countryIcon.clipsToBounds = true
        countryView.addSubview(countryIcon)
        countryIcon.snp.makeConstraints { make in
            make.centerY.equalToSuperview()
            make.leading.equalToSuperview().offset(16)
            make.width.height.equalTo(24)
        }
        
        countryCodeLabel.font = .heading_h2
        countryCodeLabel.textColor = .text_5
        countryCodeLabel.setContentHuggingPriority(.defaultHigh, for: .horizontal)
        countryCodeLabel.setContentCompressionResistancePriority(.defaultHigh, for: .horizontal)
        countryView.addSubview(countryCodeLabel)
        countryCodeLabel.snp.makeConstraints { make in
            make.centerY.equalToSuperview()
            make.leading.equalTo(countryIcon.snp.trailing).offset(4)
        }
        
        let config = UIImage.SymbolConfiguration(pointSize: 10)
        let arrow = UIImageView()
        arrow.image = .init(systemName: "chevron.down", withConfiguration: config)?.withRenderingMode(.alwaysTemplate)
        arrow.tintColor = .text_5
        countryView.addSubview(arrow)
        arrow.snp.makeConstraints { make in
            make.centerY.equalToSuperview()
            make.leading.equalTo(countryCodeLabel.snp.trailing).offset(4)
            make.trailing.equalToSuperview()
            make.width.equalTo(12)
        }
        
        phoneInputView.font = .heading_h2
        phoneInputView.textColor = .text_5
        phoneInputView.attributedPlaceholder = .init(string: .init(key: "B00021"), attributes: [
            .font: UIFont.body_l,
            .foregroundColor: UIColor.text_2
        ])
        phoneInputView.clearButtonMode = .always
        phoneInputView.keyboardType = .numberPad
        phoneInputView.cursorWidth = 2
        phoneInputView.cursorHeight = 18
        phoneInputView.addAction(UIAction(handler: { [weak self] _ in
            guard let self else { return }
            checkConfirmButton()
        }), for: .editingChanged)
        container.addSubview(phoneInputView)
        phoneInputView.snp.makeConstraints { make in
            make.centerY.equalToSuperview()
            make.leading.equalTo(countryView.snp.trailing).offset(12)
            make.trailing.equalToSuperview().offset(-12)
        }
        
        return container
    }
    
    private func buildConfirmButton() -> UIView {
        confirmButton.setBackgroundImage(.primary_8, for: .normal)
        confirmButton.layer.cornerRadius = 23.5
        confirmButton.clipsToBounds = true
        confirmButton.setTitle(.init(key: "B00023"), for: .normal)
        confirmButton.setTitleColor(.text_1, for: .normal)
        confirmButton.titleLabel?.font = .heading_h3
        confirmButton.isEnabled = false
        confirmButton.addAction(UIAction(handler: { [weak self] _ in
            guard let self else { return }
            let code = countryCodeLabel.text
            let phone = phoneInputView.text
            guard let code, let phone else { return }
            showLoading()
            LNProfileManager.shared.getBindPhoneCaptcha(code: code, phone: phone)
            { [weak self] success in
                dismissLoading()
                guard let self else { return }
                guard success else { return }
                
                delegate?.joinUsInputPhoneView(view: self, didFinished: code, phone: phone)
            }
        }), for: .touchUpInside)
        confirmButton.snp.makeConstraints { make in
            make.height.equalTo(47)
        }
        
        return confirmButton
    }
}