//
//  MeRootPageView.swift
//  Crush
//
//  Created by Leon on 2025/7/22.
//

import UIKit

class MeRootPageView: UIView {
    var headerView: MeHeaderView!

    var layout: UICollectionViewFlowLayout!
    var cv: UICollectionView!

    // Layout
    var headerHeight: CGFloat = 300

    // Data
    var datas:[AIRoleInfo] = [AIRoleInfo]()
    
    var tapAvatarAction : (()-> Void)?
    
    override init(frame: CGRect) {
        super.init(frame: frame)
        setupViews()
    }

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

    private func setupViews() {
        cv = {
            // item's height: w:h = 165:260, + 112
            let lr = CGFloat.lrs
            let itemW = (UIScreen.width - lr * 2 - 16) * 0.5
            let itemH = itemW * 260 / 165.0 + 112

            layout = UICollectionViewFlowLayout()
            layout.scrollDirection = .vertical
            layout.minimumLineSpacing = 0
            layout.minimumInteritemSpacing = 16
            layout.sectionInset = .init(top: 0, left: lr, bottom: 24 + UIWindow.safeAreaBottom, right: lr)
            layout.itemSize = .init(width: itemW, height: itemH)
            layout.headerReferenceSize = .init(width: UIScreen.width, height: headerHeight)

            let view = UICollectionView(frame: .zero, collectionViewLayout: layout)
            view.backgroundColor = .clear //.c.cbd
            view.delegate = self
            view.dataSource = self
            view.register(MeRootPageRollCell.self, forCellWithReuseIdentifier: "MeRootPageRollCell")
            view.register(MeHeaderView.self, forSupplementaryViewOfKind: UICollectionView.elementKindSectionHeader, withReuseIdentifier: "MeHeaderView")
            addSubview(view)
            view.snp.makeConstraints { make in
                make.leading.trailing.equalToSuperview()
                make.top.equalToSuperview().offset(UIWindow.navBarTotalHeight)
                make.bottom.equalToSuperview()
            }

            return view
        }()
          
    }
    
    func config(datas:[AIRoleInfo]?){
        guard let roles = datas else{
            self.datas = []
            setupEmpty(empty: true)
            return
        }
        
        self.datas = roles
        setupEmpty(empty: roles.count <= 0)
        cv.reloadData()
    }
    
    private func setupEmpty(empty: Bool){
        if(empty){
            showStartYEmpty(text: "No Character Yet", startY: 442 + UIWindow.statusBarHeight)
        }else{
            removeEmpty()
        }
    }
}

extension MeRootPageView: UICollectionViewDelegate, UICollectionViewDataSource {
    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        return self.datas.count
    }

    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "MeRootPageRollCell", for: indexPath) as! MeRootPageRollCell
        cell.cellType = .meRoleList
        let data = datas[indexPath.item]
        cell.config(data: data)
        return cell
    }
    
    func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
        let data = datas[indexPath.item]
        AppRouter.goAIRoleHome(aiId: data.aiId)
    }

    func collectionView(_ collectionView: UICollectionView, viewForSupplementaryElementOfKind kind: String, at indexPath: IndexPath) -> UICollectionReusableView {
        if kind == UICollectionView.elementKindSectionHeader {
            headerView = collectionView.dequeueReusableSupplementaryView(ofKind: kind, withReuseIdentifier: "MeHeaderView", for: indexPath) as? MeHeaderView
            headerView.heightChangeBlock = { [weak self] height in
                self?.headerHeight = height
                // dlog("height change :\(height)")
                self?.layout.headerReferenceSize = .init(width: UIScreen.width, height: height)
                self?.layout.invalidateLayout()
            }
            headerView.avatarView.tapAction = {[weak self] in
                self?.tapAvatarAction?()
            }
            return headerView
        }
        return UICollectionReusableView()
    }

    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, referenceSizeForHeaderInSection section: Int) -> CGSize {
        return .init(width: UIScreen.width, height: headerHeight)
    }
}

enum RoleGridCellType {
    case meRoleList
    case discoverList
}

class MeRootPageRollCell: UICollectionViewCell {
    var bgView: UIView!

    var gradientBorderView: GradientBorderView!
    var avatarView: UIImageView!

    var overlayOnIv: GradientView!
    var likeIconLabel: CLIconLabel!
    var seeBanIv: UIImageView!
    // ---
    var nameLabel: UILabel!
    var descLabel: UILabel!

    // Mobile tags
    var tagsStackH: UIStackView!
    
    
    var cellType: RoleGridCellType = .meRoleList
    
    // Datas
    var datas: [AIRoleInfo]?

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

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

    private func setupViews() {
        bgView = {
            let v = UIView()
            v.layer.cornerRadius = 16
            v.layer.masksToBounds = true
            v.backgroundColor = .clear // .c.csbn
            contentView.addSubview(v)
            v.snp.makeConstraints { make in
                make.leading.trailing.equalToSuperview()
                make.height.equalTo(v.snp.width).multipliedBy(260.0 / 165.0)
                make.top.equalToSuperview().offset(0)
            }
            return v
        }()

        gradientBorderView = {
            let gradient = CLSystemToken.gradient(token: .ccvn)
            let color1 = gradient.firstColor!
            let color2 = gradient.secondColor!

            let v = GradientBorderView(colors: [color1, color2], gradientType: .leftToRight)
            v.gBorderWidth = 1
            v.layer.cornerRadius = 16
            v.layer.masksToBounds = true
            v.backgroundColor = .c.csbn
            bgView.addSubview(v)
            v.snp.makeConstraints { make in
                make.edges.equalToSuperview()
            }
            return v
        }()

        avatarView = {
            let v = UIImageView()
            v.contentMode = .scaleAspectFill
            v.backgroundColor = .random.withAlphaComponent(0.3)
            v.layer.cornerRadius = 16
            v.layer.masksToBounds = true
            v.clipsToBounds = true
            bgView.addSubview(v)
            v.snp.makeConstraints { make in
                make.edges.equalToSuperview().inset(UIEdgeInsets(top: 1, left: 1, bottom: 1, right: 1))
            }
            return v
        }()

        overlayOnIv = {
            let colors = [UIColor.black.withAlphaComponent(0), UIColor.black]
            let v = GradientView(colors: colors, gradientType: .topToBottom)
            v.layer.cornerRadius = 16
            v.layer.maskedCorners = [.layerMinXMaxYCorner, .layerMaxXMaxYCorner]
            v.layer.masksToBounds = true
            bgView.addSubview(v)
            v.snp.makeConstraints { make in
                make.leading.trailing.equalTo(avatarView)
                make.bottom.equalTo(avatarView)
                make.height.equalTo(44)
            }
            return v
        }()

        likeIconLabel = {
            let v = CLIconLabel()
            bgView.addSubview(v)
            v.iconImageView.image = MWIconFont.image(fromIcon: .like, size: .init(width: 12, height: 12), color: .c.ctpn)
            v.snp.makeConstraints { make in
                make.height.equalTo(20)
                make.leading.equalToSuperview().offset(16)
                make.bottom.equalToSuperview().offset(-8)
            }
            return v
        }()

        seeBanIv = {
            let v = UIImageView()
            bgView.addSubview(v)
            v.backgroundColor = .c.csedn
            v.layer.cornerRadius = 4
            v.layer.masksToBounds = true
            v.contentMode = .center
            v.image = MWIconFont.image(fromIcon: .eyeOff, size: CGSize(width: 12, height: 12), color: .c.ctpn)
            v.snp.makeConstraints { make in
                make.size.equalTo(CGSize(width: 24, height: 24))
                make.top.equalToSuperview().offset(8)
                make.trailing.equalToSuperview().offset(-8)
            }
            return v
        }()

        nameLabel = {
            let v = UILabel()
            v.font = .t.tts
            v.textColor = .c.ctpn
            v.textAlignment = .left
            v.numberOfLines = 1
            contentView.addSubview(v)
            v.snp.makeConstraints { make in
                make.top.equalTo(bgView.snp.bottom).offset(8)
                make.leading.equalToSuperview()
                make.trailing.equalToSuperview()
            }
            return v
        }()

        descLabel = {
            let v = UILabel()
            v.font = .t.tbs
            v.textColor = .c.ctsn
            v.textAlignment = .left
            v.numberOfLines = 2
            contentView.addSubview(v)
            v.snp.makeConstraints { make in
                make.top.equalTo(nameLabel.snp.bottom).offset(4)
                make.leading.equalToSuperview()
                make.trailing.equalToSuperview()
            }
            return v
        }()

        tagsStackH = {
            let v = UIStackView()
            v.axis = .horizontal
            v.spacing = 8
            v.alignment = .center
            contentView.addSubview(v)
            v.snp.makeConstraints { make in
                make.top.equalTo(descLabel.snp.bottom).offset(8)
                make.leading.equalToSuperview()
                make.trailing.lessThanOrEqualToSuperview()
            }
            return v
        }()

//        do {
//            let tag = RoleTag()
//            tag.title = "Sensibility"
//            tag.style = .purple
//            tagsStackH.addArrangedSubview(tag)
//        }
//
//        do {
//            let tag = RoleTag()
//            tag.title = "Romantic"
//            tag.style = .theme
//            tagsStackH.addArrangedSubview(tag)
//        }

//        #warning("test data")
//        testData()
    }

    private func testData() {
        nameLabel.text = "测试数据"
        avatarView.image = UIImage(named: "eg")
        descLabel.text = "desc desc desc desc desc desc desc desc"
        likeIconLabel.contentLabel.text = "11.2k"
    }
    
    public func config(data: AIRoleInfo?){
        guard let role = data else {return}
        // 私密
        seeBanIv.isHidden = !(data?.permission == 2)
        
        nameLabel.text = role.nickname
        descLabel.text = role.introduction ?? ""
        avatarView.loadImage(role.homeImageUrl)
        
        let countDisplay = String.displayNumber(NSNumber(value: (data?.likedNum ?? 0)), scale: 1)
        likeIconLabel.contentLabel.text = countDisplay
        
        tagsStackH.removeSubviews()
        if let characterName = role.characterName{
            let tag = RoleTag()
            tag.title = characterName
//            if cellType == .meRoleList{
//                tag.style = .default
//            }else{
//                tag.style = .blurPurple
//            }
            tag.style = .default
            tagsStackH.addArrangedSubview(tag)
        }
        if let tagName = role.tagName{
            let tag = RoleTag()
            tag.title = tagName
//            if cellType == .meRoleList{
//                tag.style = .default
//            }else{
//                tag.style = .blurTheme
//            }
            tag.style = .default
            tagsStackH.addArrangedSubview(tag)
        }
    }
}