//
//  InviteJoinVC.swift
//  QuickLocation
//
//  Created by 八条 on 2026/6/1.
//

import UIKit
import ObjectMapper
import RxSwift
import RxCocoa
import Kingfisher
import Photos

class InviteJoinVC: BaseViewController {

    fileprivate var rootView: InviteJoinView!

    override func loadView() {
        rootView = InviteJoinView(frame: UIScreen.main.bounds)
        view = rootView
    }

    private let groupInModel: GroupInfoModel?

    override func viewDidLoad() {
        super.viewDidLoad()

        // 分享邀请卡片到微信
        rootView.shareBtn.rx.tap.subscribe(onNext: { [weak self] in
            self?.shareInviteCard()
        }).disposed(by: disposeBag)

        // 下载图片到相册
        rootView.downloadBtn.rx.tap.subscribe(onNext: { [weak self] in
            self?.downloadInviteCard()
        }).disposed(by: disposeBag)

        guard let model = groupInModel else { return }
        rootView.configure(model: model)
        requestOperateGroup(key: model.group_key)
    }

    // MARK: - Share / Download

    private func shareInviteCard() {
        guard let config = AppContextManager.shared.systemConfig,
              let shareConfig = config.shareConfig else { return }

        DLToast.showLoading()

        let fallbackImage = UIImage(named: "Common/logo108")
        let imageURL: URL? = {
            if shareConfig.image.isEmpty { return nil }
            return URL(string: shareConfig.image)
        }()

        let sendMessage: (UIImage?) -> Void = { [weak self] thumbImage in
            guard let self = self else { return }
            DLToast.dismiss()

            guard let screenshot = self.rootView.inviteCardView.takeScreenshot(),
                  let imageData = screenshot.pngData() else {
                DLToast.showError(text: "分享失败")
                return
            }

            let message = WXMediaMessage()
            message.title = "邀请加入圈子"
            message.description = shareConfig.content
            if let thumb = thumbImage {
                message.setThumbImage(thumb)
            }

            let imageObject = WXImageObject()
            imageObject.imageData = imageData
            message.mediaObject = imageObject

            let req = SendMessageToWXReq()
            req.bText = false
            req.message = message
            req.scene = 0

            WXApi.send(req)
        }

        if let url = imageURL {
            KingfisherManager.shared.retrieveImage(with: url) { result in
                switch result {
                case .success(let value):
                    sendMessage(value.image)
                case .failure:
                    sendMessage(fallbackImage)
                }
            }
        } else {
            sendMessage(fallbackImage)
        }
    }

    private func downloadInviteCard() {
        guard let screenshot = rootView.inviteCardView.takeScreenshot() else {
            DLToast.showError(text: "保存失败")
            return
        }
        let save = { [weak self] in
            guard let self = self else { return }
            UIImageWriteToSavedPhotosAlbum(
                screenshot, self,
                #selector(self.image(_:didFinishSavingWithError:contextInfo:)),
                nil
            )
        }
        if #available(iOS 14, *) {
            PHPhotoLibrary.requestAuthorization(for: .addOnly) { status in
                DispatchQueue.main.async {
                    if status == .authorized || status == .limited {
                        save()
                    } else {
                        Permission.openAppSetting(
                            title: "无法访问相册",
                            message: "请在设置中允许访问相册以保存邀请图片"
                        )
                    }
                }
            }
        } else {
            Permission.photosAuthorizationStatus { granted in
                if granted {
                    save()
                } else {
                    Permission.openAppSetting(
                        title: "无法访问相册",
                        message: "请在设置中允许访问相册以保存邀请图片"
                    )
                }
            }
        }
    }

    @objc private func image(_ image: UIImage,
                             didFinishSavingWithError error: Error?,
                             contextInfo: UnsafeRawPointer) {
        if error != nil {
            DLToast.showError(text: "保存失败")
        } else {
            DLToast.showSuccess(text: "已保存")
        }
    }

    // MARK: - API
    private func requestOperateGroup(key: String) {
        DLToast.showLoading()
        GroupService.operate(opType: "share", requestData: ["group_key": key]).subscribe(onNext: { [weak self] response in
            guard let self = self,
                  let data = response.data,
                  let code = data["share_code"] as? String else { return }
            self.rootView.inviteCodeLab.text = code
            self.rootView.qrCodeImgView.image = code.createQRCode(size: CGSize(width: 120, height: 120))
        }, onError: { _ in
            DLToast.show(text: "获取错误，请重试") {
                AppRouter.shared.popOrDismiss()
            }
        }).disposed(by: disposeBag)
    }

    // MARK: - Init
    init(groupInfo: [String: Any]) {
        self.groupInModel = GroupInfoModel.init(JSON: groupInfo)
        super.init(nibName: nil, bundle: nil)
    }

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