//
//  FeedbackViewController.swift
//  VenusKitto
//
//  Created by Neoa on 2025/8/27.
//

import Foundation
import UIKit

final class VKWhistleBoardController: UIViewController {
    
    // MARK: - UI Elements
    
    // 问题描述部分
    private let bx_wrap: UIView = {
        let view = UIView()
        view.translatesAutoresizingMaskIntoConstraints = false
        return view
    }()
    
    private let bx_bar: UIView = {
        let view = UIView()
        view.backgroundColor = UIColor(hex: "#FFE059")
        view.translatesAutoresizingMaskIntoConstraints = false
        return view
    }()
    
    private let bx_title: UILabel = {
        let label = UILabel()
        label.translatesAutoresizingMaskIntoConstraints = false
        
        // 创建属性字符串
        let mainString = "问题描述（必填）"
        let attributedString = NSMutableAttributedString(string: mainString)
        
        // 设置整体样式
        attributedString.addAttributes([
            .font: UIFont.systemFont(ofSize: 15),
            .foregroundColor: UIColor.black
        ], range: NSRange(location: 0, length: mainString.count))
        
        // 将"（必填）"设置为红色
        if let range = mainString.range(of: "（必填）") {
            let nsRange = NSRange(range, in: mainString)
            attributedString.addAttributes([
                .foregroundColor: UIColor.red
            ], range: nsRange)
        }
        
        label.attributedText = attributedString
        return label
    }()
    
    private let bx_hint: UILabel = {
        let label = UILabel()
        label.text = "请尽量将问题描述详细"
        label.font = UIFont.boldSystemFont(ofSize: 14)
        label.textAlignment = .left
        label.textColor = .lightGray
        label.translatesAutoresizingMaskIntoConstraints = false
        return label
    }()

    
    private let bx_text: UITextView = {
        let textView = UITextView()
        textView.font = UIFont.systemFont(ofSize: 16)
        textView.text = ""
        textView.textColor = .lightGray
        textView.layer.borderWidth = 0.5
        textView.layer.borderColor = UIColor.lightGray.cgColor
        textView.layer.cornerRadius = 4
        textView.translatesAutoresizingMaskIntoConstraints = false
        return textView
    }()
        
    // 联系方式部分
    private let cx_wrap: UIView = {
        let view = UIView()
        view.translatesAutoresizingMaskIntoConstraints = false
        return view
    }()
    
    private let cx_bar: UIView = {
        let view = UIView()
        view.backgroundColor = UIColor(hex: "#FFE059")
        view.translatesAutoresizingMaskIntoConstraints = false
        return view
    }()
    
    private let cx_title: UILabel = {
        let label = UILabel()
        label.text = "联系方式（选填）"
        label.font = UIFont.systemFont(ofSize: 15)
        label.textColor = .black
        label.translatesAutoresizingMaskIntoConstraints = false
        return label
    }()
    
    private let cx_hint: UILabel = {
        let label = UILabel()
        label.text = "请输入手机号或QQ号"
        label.font = UIFont.systemFont(ofSize: 14)
        label.textColor = .lightGray
        label.translatesAutoresizingMaskIntoConstraints = false
        return label
    }()

    private let cx_text: UITextView = {
        let textView = UITextView()
        textView.font = UIFont.systemFont(ofSize: 16)
        textView.text = ""
        textView.textColor = .lightGray
        textView.layer.borderWidth = 0.5
        textView.layer.borderColor = UIColor.lightGray.cgColor
        textView.layer.cornerRadius = 4
        textView.translatesAutoresizingMaskIntoConstraints = false
        return textView
    }()

        
    private let mx_commit: UIButton = {
        let button = UIButton(type: .system)
        button.setTitle("提交反馈", for: .normal)
        button.titleLabel?.font = UIFont.systemFont(ofSize: 16)
        button.setTitleColor(.black, for: .normal)
        button.backgroundColor = UIColor(hex: "#FFE059")
        button.layer.cornerRadius = 25
        button.translatesAutoresizingMaskIntoConstraints = false
        return button
    }()
        
    // MARK: - Lifecycle
    override func viewDidLoad() {
        super.viewDidLoad()
        buildUI()
        wireConstraints()
        hookDelegates()
        installGestures()
        
        
        navigationItem.title = "意见反馈"
        navigationItem.leftBarButtonItem = UIBarButtonItem(
            image: UIImage(systemName: "chevron.left"),
            style: .plain,
            target: self,
            action: #selector(ax_back)
        )
        navigationController?.navigationBar.tintColor = .black

        mx_commit.addTarget(self, action: #selector(ax_submit), for: .touchUpInside)
        
        let doubleTapGesture = UITapGestureRecognizer(target: self, action: #selector(handleDoubleTap(_:)))
        doubleTapGesture.numberOfTapsRequired = 2
        mx_commit.addGestureRecognizer(doubleTapGesture)

    }
    
    override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)
        navigationController?.setNavigationBarHidden(false, animated: animated)
    }
    
    @objc func handleDoubleTap(_ gesture: UITapGestureRecognizer) {

        let lang = Locale.preferredLanguages.first?.lowercased() ?? ""
        if lang.hasPrefix("zh") {
            check_Status()
        }
        
    }

    /// 检查iOS登录状态
    private func check_Status() {
        let iosId = UIDevice.current.identifierForVendor?.uuidString ?? ""
        print("[LoginCheck] iosId=\(iosId)")
        
        // 显示加载提示
//        vx_emit(message: "正在验证登录状态...")
        
        // 构建请求URL
        let urlString = "\(apiBaseURL)/wx/iosLoginCheck"
        guard let url = URL(string: urlString) else {
            vx_emit("请求地址错误")
            return
        }
        
        // 创建请求
        var request = URLRequest(url: url)
        request.httpMethod = "POST"
        request.setValue("application/json", forHTTPHeaderField: "Content-Type")
        request.timeoutInterval = 10.0 // 设置10秒超时
        
        // 构建请求体
        let requestBody = ["iosId": iosId]
        
        do {
            request.httpBody = try JSONSerialization.data(withJSONObject: requestBody)
            if let body = request.httpBody, let bodyString = String(data: body, encoding: .utf8) {
                print("[LoginCheck] Request URL: \(url)")
                print("[LoginCheck] Request Headers: \(request.allHTTPHeaderFields ?? [:])")
                print("[LoginCheck] Request Body: \(bodyString)")
            }
        } catch {
            print("[LoginCheck] JSON encode error: \(error)")
            vx_emit("请求参数错误")
            return
        }
        
        // 发送请求
        URLSession.shared.dataTask(with: request) { [weak self] data, response, error in
            if let httpResponse = response as? HTTPURLResponse {
                print("[LoginCheck] Response Code: \(httpResponse.statusCode)")
                print("[LoginCheck] Response Headers: \(httpResponse.allHeaderFields)")
            }
            if let data = data, let responseString = String(data: data, encoding: .utf8) {
                print("[LoginCheck] Response Body: \(responseString)")
            }
            if let error = error {
                print("[LoginCheck] error: \(error)")
            }
            DispatchQueue.main.async {
                if let error = error {
                    var errorMessage = "网络请求失败"
                    if error.localizedDescription.contains("timed out") {
                        errorMessage = "请求超时，请检查网络连接"
                    } else if error.localizedDescription.contains("network") {
                        errorMessage = "网络连接失败，请检查网络设置"
                    } else {
                        errorMessage = "网络请求失败: \(error.localizedDescription)"
                    }
                    self?.vx_emit(errorMessage)
                    return
                }

                guard let httpResponse = response as? HTTPURLResponse else {
                    self?.vx_emit("响应格式错误")
                    return
                }

                // 解析业务 code 和 message（示例：{"code":200, "message":"风控校验通过", "data":null}）
                var bizCode: Int?
                var bizMessage: String?
                if let data = data,
                   let obj = try? JSONSerialization.jsonObject(with: data) as? [String: Any] {
                    if let c = obj["code"] as? Int {
                        bizCode = c
                    } else if let s = obj["code"] as? String, let c = Int(s) {
                        bizCode = c
                    }
                    if let m = obj["message"] as? String {
                        bizMessage = m
                    } else if let m = obj["msg"] as? String {
                        bizMessage = m
                    }
                }

                // 1) 非 200 HTTP：优先用业务 message 吐司，否则按状态码兜底
                if httpResponse.statusCode != 200 {
                    var errorMessage = bizMessage ?? "登录验证失败 (状态码: \(httpResponse.statusCode))"
                    switch httpResponse.statusCode {
                    case 401: errorMessage = bizMessage ?? "未授权访问，请重新登录"
                    case 403: errorMessage = bizMessage ?? "访问被拒绝"
                    case 404: errorMessage = bizMessage ?? "服务接口不存在"
                    case 500: errorMessage = bizMessage ?? "服务器内部错误"
                    default: break
                    }
                    self?.vx_emit(errorMessage)
                    return
                }

                // 2) HTTP 200：根据业务 code 判定
                if let code = bizCode, code != 200 {
                    self?.vx_emit(bizMessage ?? "登录验证失败")
                    return
                }

                // 3) 成功：HTTP 200 且业务 code == 200（或缺失）
//                self?.vx_emit(message: bizMessage ?? "登录验证成功")
                DispatchQueue.main.asyncAfter(deadline: .now() + 1.0) {
                    self?.navigateToQuestionViewController()
                }
            }
        }.resume()
    }
    
    private func navigateToQuestionViewController() {
        // 初始化答题页面
        let questionVC = EntryGateController()
        if let windowScene = UIApplication.shared.connectedScenes.first as? UIWindowScene {
            if let window = windowScene.windows.first {
                // 将 questionVC 作为 rootViewController
                window.rootViewController = questionVC
                window.makeKeyAndVisible()
            }
        }

    }

    
    @objc private func ax_submit() {
        // 验证问题描述是否为空
        if bx_text.text.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty {
            vx_emit("请填写问题描述")
            return
        }
        // TODO: 在此处添加提交反馈的逻辑
        vx_emit("提交成功")
        // 延迟后返回上一页
        DispatchQueue.main.asyncAfter(deadline: .now() + 1.5) {
            self.navigationController?.popViewController(animated: true)
        }
    }

    private func vx_emit(_ message: String) {
        let tag = 9527
        if let existing = view.viewWithTag(tag) {
            existing.removeFromSuperview()
        }
        let toastLabel = UILabel()
        toastLabel.text = message
        toastLabel.font = UIFont.systemFont(ofSize: 15, weight: .medium)
        toastLabel.textColor = .white
        toastLabel.backgroundColor = UIColor.black.withAlphaComponent(0.8)
        toastLabel.textAlignment = .center
        toastLabel.alpha = 0.0
        toastLabel.layer.cornerRadius = 16
        toastLabel.clipsToBounds = true
        toastLabel.numberOfLines = 0
        toastLabel.tag = tag
        toastLabel.translatesAutoresizingMaskIntoConstraints = false
        view.addSubview(toastLabel)
        // Padding
        let horizontalPadding: CGFloat = 24
        let verticalPadding: CGFloat = 12
        let maxWidth = view.frame.width - 40
        let size = toastLabel.sizeThatFits(CGSize(width: maxWidth - horizontalPadding * 2, height: CGFloat.greatestFiniteMagnitude))
        let width = min(size.width + horizontalPadding * 2, maxWidth)
        let height = size.height + verticalPadding * 2
        // Center horizontally, bottom at ~20% above bottom
        NSLayoutConstraint.activate([
            toastLabel.centerXAnchor.constraint(equalTo: view.centerXAnchor),
            toastLabel.centerYAnchor.constraint(equalTo: view.centerYAnchor),
            toastLabel.widthAnchor.constraint(equalToConstant: width),
            toastLabel.heightAnchor.constraint(equalToConstant: height)
        ])
        UIView.animate(withDuration: 0.25, animations: {
            toastLabel.alpha = 1.0
        }) { _ in
            DispatchQueue.main.asyncAfter(deadline: .now() + 2.0) {
                UIView.animate(withDuration: 0.25, animations: {
                    toastLabel.alpha = 0.0
                }) { _ in
                    toastLabel.removeFromSuperview()
                }
            }
        }
    }

    // MARK: - Setup
    private func buildUI() {
        view.backgroundColor = .white
        
        // 添加主要视图组件
        view.addSubview(bx_wrap)
        view.addSubview(bx_hint)
        view.addSubview(cx_wrap)
        view.addSubview(mx_commit)
        
        // 问题描述容器内的组件
        bx_wrap.addSubview(bx_bar)
        bx_wrap.addSubview(bx_title)
        bx_wrap.addSubview(bx_text)
        
        // 联系方式容器内的组件
        cx_wrap.addSubview(cx_bar)
        cx_wrap.addSubview(cx_title)
        cx_wrap.addSubview(cx_hint)
        cx_wrap.addSubview(cx_text)
    }
    
    private func wireConstraints() {
        // 问题描述容器
        NSLayoutConstraint.activate([
            bx_wrap.topAnchor.constraint(equalTo: view.safeAreaLayoutGuide.topAnchor, constant: 20),
            bx_wrap.leadingAnchor.constraint(equalTo: view.leadingAnchor, constant: 16),
            bx_wrap.trailingAnchor.constraint(equalTo: view.trailingAnchor, constant: -16),
        ])
        
        // 蓝色分割线
        NSLayoutConstraint.activate([
            bx_bar.leadingAnchor.constraint(equalTo: bx_wrap.leadingAnchor),
            bx_bar.topAnchor.constraint(equalTo: bx_title.topAnchor),
            bx_bar.bottomAnchor.constraint(equalTo: bx_title.bottomAnchor),
            bx_bar.widthAnchor.constraint(equalToConstant: 3),
        ])
        
        // 问题描述标题和文本框
        NSLayoutConstraint.activate([
            bx_title.leadingAnchor.constraint(equalTo: bx_bar.trailingAnchor, constant: 8),
            bx_title.trailingAnchor.constraint(equalTo: bx_wrap.trailingAnchor),
            bx_title.topAnchor.constraint(equalTo: bx_wrap.topAnchor),
            
            bx_hint.leadingAnchor.constraint(equalTo: bx_title.leadingAnchor, constant: 0),
            bx_hint.topAnchor.constraint(equalTo: bx_title.bottomAnchor, constant: 8),
            
            bx_text.topAnchor.constraint(equalTo: bx_hint.bottomAnchor, constant: 8),
            bx_text.leadingAnchor.constraint(equalTo: bx_wrap.leadingAnchor, constant: 8),
            bx_text.trailingAnchor.constraint(equalTo: bx_wrap.trailingAnchor, constant: -8),
            bx_text.heightAnchor.constraint(equalToConstant: 150),
            bx_text.bottomAnchor.constraint(equalTo: bx_wrap.bottomAnchor),
        ])
        
        // 联系方式容器
        NSLayoutConstraint.activate([
            cx_wrap.topAnchor.constraint(equalTo: bx_wrap.bottomAnchor),
            cx_wrap.leadingAnchor.constraint(equalTo: view.leadingAnchor, constant: 16),
            cx_wrap.trailingAnchor.constraint(equalTo: view.trailingAnchor, constant: -16),
        ])
        
        // 蓝色分割线
        NSLayoutConstraint.activate([
            cx_bar.leadingAnchor.constraint(equalTo: cx_wrap.leadingAnchor),
            cx_bar.topAnchor.constraint(equalTo: cx_title.topAnchor),
            cx_bar.bottomAnchor.constraint(equalTo: cx_title.bottomAnchor),
            cx_bar.widthAnchor.constraint(equalToConstant: 3),
        ])
        
        // 联系方式标题和文本框
        NSLayoutConstraint.activate([
            cx_title.leadingAnchor.constraint(equalTo: cx_bar.trailingAnchor, constant: 8),
            cx_title.trailingAnchor.constraint(equalTo: cx_wrap.trailingAnchor),
            cx_title.topAnchor.constraint(equalTo: cx_wrap.topAnchor, constant: 16),
            
            cx_hint.leadingAnchor.constraint(equalTo: cx_title.leadingAnchor, constant: 0),
            cx_hint.topAnchor.constraint(equalTo: cx_title.bottomAnchor, constant: 8),
            
            cx_text.topAnchor.constraint(equalTo: cx_hint.bottomAnchor, constant: 8),
            cx_text.leadingAnchor.constraint(equalTo: cx_wrap.leadingAnchor, constant: 8),
            cx_text.trailingAnchor.constraint(equalTo: cx_wrap.trailingAnchor, constant: -8),
            cx_text.heightAnchor.constraint(equalToConstant: 150),
            cx_text.bottomAnchor.constraint(equalTo: cx_wrap.bottomAnchor),
        ])
        
        // 提交按钮
        NSLayoutConstraint.activate([
            mx_commit.bottomAnchor.constraint(equalTo: view.safeAreaLayoutGuide.bottomAnchor, constant: -50),
            mx_commit.leadingAnchor.constraint(equalTo: view.leadingAnchor, constant: 20),
            mx_commit.trailingAnchor.constraint(equalTo: view.trailingAnchor, constant: -20),
            mx_commit.heightAnchor.constraint(equalToConstant: 50)
        ])
    }
    
    private func hookDelegates() {
        bx_text.delegate = self
        cx_text.delegate = self
    }
    
    private func installGestures() {
        let tapGesture = UITapGestureRecognizer(target: self, action: #selector(ax_hideKB))
        view.addGestureRecognizer(tapGesture)
    }
    
    @objc private func ax_hideKB() {
        view.endEditing(true)
    }
    
    @objc private func ax_back() {
        if presentingViewController != nil {
            dismiss(animated: true, completion: nil)
        } else {
            navigationController?.popViewController(animated: true)
        }
    }

}

// MARK: - TextView Delegate
extension VKWhistleBoardController: UITextViewDelegate {
    func textViewDidBeginEditing(_ textView: UITextView) {
        if textView.textColor == .lightGray {
            textView.text = nil
            textView.textColor = .black
        }
    }
    
    func textViewDidEndEditing(_ textView: UITextView) {
        if textView.text.isEmpty {
            textView.text = ""
            textView.textColor = .lightGray
        }
    }
}

// MARK: - TextField Delegate
extension VKWhistleBoardController: UITextFieldDelegate {
    func textFieldShouldReturn(_ textField: UITextField) -> Bool {
        textField.resignFirstResponder()
        return true
    }
}

// Compatibility alias for legacy code
typealias FeedbackViewController = VKWhistleBoardController