//
//  LNOrderListItemCell.swift
//  Lanu
//
//  Created by OneeChan on 2025/11/18.
//

import Foundation
import UIKit
import SnapKit


class LNOrderListItemCell: UITableViewCell {
    private let dateLabel = UILabel()
    private let stateLabel = UILabel()
    
    private let avatar = UIImageView()
    private let userNameLabel = UILabel()
    private let gameLabel = UILabel()
    
    private let priceLabel = UILabel()
    private let countLabel = UILabel()
    
    private let operationButton = UIButton()
    private let descLabel = UILabel()
    private let discountView = UIView()
    private let totalLabel = UILabel()

    private var curItem: LNOrderListItemVO?
    
    override init(style: UITableViewCell.CellStyle, reuseIdentifier: String?) {
        super.init(style: style, reuseIdentifier: reuseIdentifier)
        
        setupViews()
    }
    
    func update(_ item: LNOrderListItemVO) {
        avatar.showAvatar(item.avatar)
        dateLabel.text = TimeInterval(item.createTime / 1_000).formattedFullDate()
        userNameLabel.text = item.nickname
        gameLabel.text = item.bizCategoryName
        
        priceLabel.text = "\(item.price.toDisplay)"
        countLabel.text = "\(item.unit) x \(item.purchaseQty)"
        
        totalLabel.text = item.totalAmount.toDisplay
        discountView.isHidden = item.totalAmount >= item.price * Double(item.purchaseQty)
        
        curItem = item
        
        updateByStateChanged()
    }
    
    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
}

extension LNOrderListItemCell {
    @objc
    private func handleOperationButtonClick() {
        guard let orderItem = curItem else { return }
        switch orderItem.status {
        case .created, .waitingForAccept: // 可以取消
            LNCommonAlertView.showCancelOrderAlert(orderId: orderItem.orderId) { success in
                guard success else { return }
                orderItem.status = .cancelled
            }
            break
        case .completed: // 可以评价
            let panel = LNOrderCommentPanel()
            panel.update(orderItem.avatar, orderId: orderItem.orderId)
            panel.handler = { star, comment in
                orderItem.star = star
            }
            panel.popup()
            break
        case .serviceDone: // 可以点击完成
            LNCommonAlertView.showFinishOrderAlert(orderId: orderItem.orderId) { success in
                guard success else { return }
                orderItem.status = .completed
            }
            break
        case .refunded, .accepted, .rejected, .cancelled, .servicing:
            // 无操作选项
            break
        }
    }
}

extension LNOrderListItemCell {
    private func updateByStateChanged() {
        guard let curItem else { return }
        
        if curItem.refundApply {
            stateLabel.text = .init(key: "A00049")
            stateLabel.textColor = .init(hex: "#FFB836")
            
            operationButton.isHidden = true
            descLabel.isHidden = false
            descLabel.text = .init(key: "A00148")
            return
        }
        
        operationButton.isHidden = true
        operationButton.setBackgroundImage(nil, for: .normal)
        descLabel.isHidden = true
        
        switch curItem.status {
        case .created, .waitingForAccept:
            stateLabel.text = .init(key: "A00055")
            stateLabel.textColor = .init(hex: "#FFB836")
            
            operationButton.isHidden = false
            operationButton.layer.borderColor = UIColor.fill_3.cgColor
            operationButton.setTitleColor(.text_3, for: .normal)
            operationButton.setTitle(.init(key: "A00003"), for: .normal)
        case .completed:
            stateLabel.text = .init(key: "A00137")
            stateLabel.textColor = .text_6
            
            if curItem.star == 0 {
                operationButton.isHidden = false
                operationButton.layer.borderColor = UIColor.text_6.cgColor
                operationButton.setTitleColor(.text_6, for: .normal)
                operationButton.setTitle(.init(key: "A00149"), for: .normal)
            }
        case .refunded:
            stateLabel.text = .init(key: "A00138")
            stateLabel.textColor = .text_3
            
            operationButton.isHidden = true
            descLabel.isHidden = false
            descLabel.text = .init(key: "A00150")
        case .accepted:
            stateLabel.text = .init(key: "A00139")
            stateLabel.textColor = .text_6
        case .rejected:
            stateLabel.text = .init(key: "A00140")
            stateLabel.textColor = .text_6
        case .servicing:
            stateLabel.text = .init(key: "A00141")
            stateLabel.textColor = .init(hex: "#FFB836")
        case .serviceDone:
            stateLabel.text = .init(key: "A00141")
            stateLabel.textColor = .init(hex: "#FFB836")
            
            operationButton.isHidden = false
            operationButton.layer.borderColor = UIColor.clear.cgColor
            operationButton.setTitleColor(.text_1, for: .normal)
            operationButton.setTitle(.init(key: "A00151"), for: .normal)
            operationButton.setBackgroundImage(.primary_8, for: .normal)
        case .cancelled:
            stateLabel.text = .init(key: "A00152")
            stateLabel.textColor = .text_3
        }
    }
    
    private func setupViews() {
        backgroundColor = .clear
        onTap { [weak self] in
            guard let self else { return }
            guard let curItem else { return }
            pushToOrderDetail(orderId: curItem.orderId)
        }
        
        let container = UIView()
        container.backgroundColor = .fill
        container.layer.cornerRadius = 12
        contentView.addSubview(container)
        container.snp.makeConstraints { make in
            make.horizontalEdges.equalToSuperview().inset(16)
            make.top.equalToSuperview().offset(6)
            make.bottom.equalToSuperview().offset(-6)
        }
        
        let top = buildTopView()
        container.addSubview(top)
        top.snp.makeConstraints { make in
            make.horizontalEdges.equalToSuperview()
            make.top.equalToSuperview().offset(5)
        }
        
        let line = UIView()
        line.backgroundColor = .fill_2
        container.addSubview(line)
        line.snp.makeConstraints { make in
            make.horizontalEdges.equalToSuperview().inset(11)
            make.top.equalTo(top.snp.bottom)
            make.height.equalTo(0.5)
        }
        
        let mid = buildMidView()
        container.addSubview(mid)
        mid.snp.makeConstraints { make in
            make.horizontalEdges.equalToSuperview()
            make.top.equalTo(top.snp.bottom).offset(3)
        }
        
        let bottom = buildBottomView()
        container.addSubview(bottom)
        bottom.snp.makeConstraints { make in
            make.horizontalEdges.equalToSuperview()
            make.top.equalTo(mid.snp.bottom).offset(3)
            make.bottom.equalToSuperview().offset(-5)
        }
    }
    
    private func buildTopView() -> UIView {
        let container = UIView()
        container.snp.makeConstraints { make in
            make.height.equalTo(30)
        }
        
        stateLabel.font = .heading_h5
        container.addSubview(stateLabel)
        stateLabel.snp.makeConstraints { make in
            make.centerY.equalToSuperview()
            make.trailing.equalToSuperview().offset(-12)
            make.width.height.equalTo(0).priority(.low)
        }
        
        dateLabel.font = .body_xs
        dateLabel.textColor = .text_3
        container.addSubview(dateLabel)
        dateLabel.snp.makeConstraints { make in
            make.leading.equalToSuperview().offset(12)
            make.centerY.equalToSuperview()
            make.trailing.lessThanOrEqualTo(stateLabel.snp.leading).offset(-5)
        }
        
        return container
    }
    
    private func buildMidView() -> UIView {
        let container = UIView()
        
        let price = buildPriceView()
        container.addSubview(price)
        price.snp.makeConstraints { make in
            make.centerY.equalToSuperview()
            make.trailing.equalToSuperview().offset(-12)
        }
        
        let infoView = buildUserInfoView()
        container.addSubview(infoView)
        infoView.snp.makeConstraints { make in
            make.leading.equalToSuperview().offset(12)
            make.verticalEdges.equalToSuperview().inset(4)
            make.trailing.lessThanOrEqualTo(price.snp.leading).offset(-12)
        }
        
        return container
    }
    
    private func buildBottomView() -> UIView {
        let container = UIView()
        container.snp.makeConstraints { make in
            make.height.equalTo(38)
        }
        
        totalLabel.font = .heading_h3
        totalLabel.textColor = .text_5
        container.addSubview(totalLabel)
        totalLabel.snp.makeConstraints { make in
            make.centerY.equalToSuperview()
            make.trailing.equalToSuperview().offset(-12)
        }
        
        let coin = UIImageView.coinImageView()
        container.addSubview(coin)
        coin.snp.makeConstraints { make in
            make.centerY.equalToSuperview()
            make.trailing.equalTo(totalLabel.snp.leading).offset(-2)
            make.width.height.equalTo(20)
        }
        
        let text = UILabel()
        text.font = .body_s
        text.textColor = .text_5
        text.text = .init(key: "A00124")
        container.addSubview(text)
        text.snp.makeConstraints { make in
            make.centerY.equalToSuperview()
            make.trailing.equalTo(coin.snp.leading)
        }
        
        let discount = buildDiscount()
        container.addSubview(discount)
        discount.snp.makeConstraints { make in
            make.centerY.equalToSuperview()
            make.trailing.equalTo(text.snp.leading).offset(-5)
        }
        
        operationButton.layer.cornerRadius = 15
        operationButton.layer.borderWidth = 1
        operationButton.clipsToBounds = true
        operationButton.titleLabel?.font = .heading_h5
        operationButton.addTarget(self, action: #selector(handleOperationButtonClick), for: .touchUpInside)
        container.addSubview(operationButton)
        operationButton.snp.makeConstraints { make in
            make.height.equalTo(30)
            make.centerY.equalToSuperview()
            make.leading.equalToSuperview().offset(12)
            make.width.equalTo(77)
        }
        
        descLabel.font = .body_xs
        descLabel.textColor = .text_3
        descLabel.setContentHuggingPriority(.defaultLow, for: .horizontal)
        descLabel.setContentCompressionResistancePriority(.defaultLow, for: .horizontal)
        container.addSubview(descLabel)
        descLabel.snp.makeConstraints { make in
            make.leading.equalToSuperview().offset(12)
            make.centerY.equalToSuperview()
            make.trailing.lessThanOrEqualTo(discount.snp.leading).offset(-16)
        }
        
        return container
    }
    
    private func buildUserInfoView() -> UIView {
        let container = UIView()
        container.onTap { [weak self] in
            guard let self else { return }
            guard let curItem else { return }
            pushToProfile(uid: curItem.sellerUserNo)
        }
        
        avatar.layer.cornerRadius = 20
        avatar.clipsToBounds = true
        container.addSubview(avatar)
        avatar.snp.makeConstraints { make in
            make.leading.verticalEdges.equalToSuperview()
            make.width.height.equalTo(40)
        }
        
        
        let textInfo = UIView()
        container.addSubview(textInfo)
        textInfo.snp.makeConstraints { make in
            make.centerY.equalToSuperview()
            make.leading.equalTo(avatar.snp.trailing).offset(8)
            make.trailing.equalToSuperview()
        }
        
        userNameLabel.textColor = .text_5
        userNameLabel.font = .heading_h4
        textInfo.addSubview(userNameLabel)
        userNameLabel.snp.makeConstraints { make in
            make.horizontalEdges.equalToSuperview()
            make.top.equalToSuperview()
        }
        
        gameLabel.font = .body_m
        gameLabel.textColor = .text_5
        textInfo.addSubview(gameLabel)
        gameLabel.snp.makeConstraints { make in
            make.horizontalEdges.equalToSuperview()
            make.bottom.equalToSuperview()
            make.top.equalTo(userNameLabel.snp.bottom).offset(2)
        }
        
        return container
    }
    
    private func buildPriceView() -> UIView {
        let container = UIView()
        
        let coin = UIImageView.coinImageView()
        container.addSubview(coin)
        coin.snp.makeConstraints { make in
            make.top.equalToSuperview()
            make.leading.equalToSuperview()
            make.width.height.equalTo(16)
        }
        
        priceLabel.font = .body_s
        priceLabel.textColor = .text_5
        container.addSubview(priceLabel)
        priceLabel.snp.makeConstraints { make in
            make.trailing.equalToSuperview()
            make.leading.equalTo(coin.snp.trailing)
            make.centerY.equalTo(coin)
        }
        
        countLabel.font = .body_xs
        countLabel.textColor = .text_4
        countLabel.setContentHuggingPriority(.defaultHigh, for: .horizontal)
        countLabel.setContentCompressionResistancePriority(.defaultHigh, for: .horizontal)
        container.addSubview(countLabel)
        countLabel.snp.makeConstraints { make in
            make.trailing.bottom.equalToSuperview()
            make.top.equalTo(coin.snp.bottom).offset(2)
        }
        
        return container
    }
    
    private func buildDiscount() -> UIView {
        discountView.layer.cornerRadius = 4
        discountView.backgroundColor = .init(hex: "#FF6F32")
        
        let titleLabel = UILabel()
        titleLabel.text = .init(key: "A00129")
        titleLabel.font = .body_xs
        titleLabel.textColor = .text_1
        discountView.addSubview(titleLabel)
        titleLabel.snp.makeConstraints { make in
            make.horizontalEdges.equalToSuperview().inset(6)
            make.verticalEdges.equalToSuperview().inset(3)
        }
        
        return discountView
    }
}

#if DEBUG

import SwiftUI

struct LNOrderListItemCellPreview: UIViewRepresentable {
    func makeUIView(context: Context) -> some UIView {
        let container = UIView()
        container.backgroundColor = .lightGray
        
        let view = LNOrderListItemCell()
        container.addSubview(view)
        view.snp.makeConstraints { make in
            make.horizontalEdges.equalToSuperview()
            make.centerY.equalToSuperview()
            make.height.equalTo(133)
        }
        
        return container
    }
    
    func updateUIView(_ uiView: UIViewType, context: Context) { }
}

#Preview(body: {
    LNOrderListItemCellPreview()
})
#endif // DEBUG