//
//  LNHourRangePickerPanel.swift
//  Gami
//
//  Created by OneeChan on 2026/1/23.
//

import Foundation
import UIKit
import SnapKit


class LNHourRangePickerPanel: LNPopupView {
    private let titleLabel = UILabel()
    private let descLabel = UILabel()
    
    private let fromPicker = UIPickerView()
    private let toPicker = UIPickerView()
    
    var isRelative: Bool = true
    var handler: ((Int, Int) -> Void)?
    
    override init(frame: CGRect) {
        super.init(frame: frame)
        
        setupViews()
    }
    
    func setTitles(_ title: String, desc: String? = nil) {
        titleLabel.text = title
        descLabel.text = desc
        descLabel.isHidden = desc?.isEmpty != false
    }
    
    func setDefault(from: Int, to: Int) {
        fromPicker.selectRow(from, inComponent: 0, animated: false)
        let toIndex = if isRelative {
            to - from - 1
        } else {
            to
        }
        toPicker.selectRow(toIndex, inComponent: 0, animated: false)
    }
    
    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
}

extension LNHourRangePickerPanel: UIPickerViewDataSource, UIPickerViewDelegate {
    func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
        if pickerView == toPicker, isRelative {
            24
        } else {
            24
        }
    }
    
    func numberOfComponents(in pickerView: UIPickerView) -> Int {
        1
    }
    
    func pickerView(_ pickerView: UIPickerView, viewForRow row: Int, forComponent component: Int, reusing view: UIView?) -> UIView {
        let itemView = view as? LNHourRangeItemView ?? LNHourRangeItemView()
        
        if pickerView == fromPicker {
            itemView.titleLabel.text = String(format: "%02d:00", row)
        } else if pickerView == toPicker {
            if isRelative {
                let from = fromPicker.selectedRow(inComponent: 0)
                itemView.titleLabel.text = String(format: "%02d:00", (row + from + 1) % 24)
            } else {
                itemView.titleLabel.text = String(format: "%02d:00", row)
            }
        }
        
        return itemView
    }
    
    func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
        if pickerView == fromPicker, isRelative {
            toPicker.reloadComponent(0)
        }
    }
    
    func pickerView(_ pickerView: UIPickerView, rowHeightForComponent component: Int) -> CGFloat {
        52
    }
}

extension LNHourRangePickerPanel {
    private func setupViews() {
        let header = UIView()
        container.addSubview(header)
        header.snp.makeConstraints { make in
            make.horizontalEdges.equalToSuperview()
            make.top.equalToSuperview()
        }
        
        let stackView = UIStackView()
        stackView.axis = .vertical
        stackView.spacing = 4
        header.addSubview(stackView)
        stackView.snp.makeConstraints { make in
            make.horizontalEdges.equalToSuperview().inset(22)
            make.verticalEdges.equalToSuperview().inset(9)
        }
        
        titleLabel.font = .heading_h3
        titleLabel.textColor = .text_5
        titleLabel.textAlignment = .center
        stackView.addArrangedSubview(titleLabel)
        
        descLabel.font = .body_s
        descLabel.textColor = .text_4
        descLabel.textAlignment = .center
        descLabel.numberOfLines = 0
        stackView.addArrangedSubview(descLabel)
        
        let pickerView = UIView()
        container.addSubview(pickerView)
        pickerView.snp.makeConstraints { make in
            make.horizontalEdges.equalToSuperview().inset(20)
            make.top.equalTo(header.snp.bottom)
            make.height.equalTo(150)
        }
        
        let textView = UIView()
        pickerView.addSubview(textView)
        textView.snp.makeConstraints { make in
            make.center.equalToSuperview()
        }
        
        let toLabel = UILabel()
        toLabel.font = .body_l
        toLabel.textColor = .text_5
        toLabel.text = .init(key: "B00081")
        toLabel.textAlignment = .center
        toLabel.setContentHuggingPriority(.required, for: .horizontal)
        toLabel.setContentCompressionResistancePriority(.required, for: .horizontal)
        textView.addSubview(toLabel)
        toLabel.snp.makeConstraints { make in
            make.horizontalEdges.equalToSuperview().inset(12)
            make.verticalEdges.equalToSuperview()
        }
        
        fromPicker.delegate = self
        fromPicker.dataSource = self
        pickerView.addSubview(fromPicker)
        fromPicker.snp.makeConstraints { make in
            make.verticalEdges.equalToSuperview()
            make.leading.equalToSuperview()
            make.trailing.equalTo(textView.snp.leading)
        }
        
        toPicker.delegate = self
        toPicker.dataSource = self
        pickerView.addSubview(toPicker)
        toPicker.snp.makeConstraints { make in
            make.verticalEdges.equalToSuperview()
            make.trailing.equalToSuperview()
            make.leading.equalTo(textView.snp.trailing)
            make.width.equalTo(fromPicker)
        }
        
        let confirm = UIButton()
        confirm.setTitle(.init(key: "A00002"), for: .normal)
        confirm.setTitleColor(.text_1, for: .normal)
        confirm.setBackgroundImage(.primary_8, for: .normal)
        confirm.layer.cornerRadius = 23.5
        confirm.titleLabel?.font = .heading_h3
        confirm.clipsToBounds = true
        confirm.addAction(UIAction(handler: { [weak self] _ in
            guard let self else { return }
            dismiss()
            let from = fromPicker.selectedRow(inComponent: 0)
            var to = toPicker.selectedRow(inComponent: 0)
            if isRelative {
                to += from + 1
            }
            handler?(from, to)
        }), for: .touchUpInside)
        container.addSubview(confirm)
        confirm.snp.makeConstraints { make in
            make.horizontalEdges.equalToSuperview().inset(22)
            make.bottom.equalToSuperview().offset(commonBottomInset)
            make.height.equalTo(47)
            make.top.equalTo(pickerView.snp.bottom).offset(4)
        }
        
        runOnMain { [weak self] in
            guard let self else { return }
            fromPicker.subviews.forEach {
                if $0.subviews.isEmpty {
                    $0.backgroundColor = .clear
                }
            }
            toPicker.subviews.forEach {
                if $0.subviews.isEmpty {
                    $0.backgroundColor = .clear
                }
            }
        }
    }
}


private class LNHourRangeItemView: UIView {
    let titleLabel = UILabel()
    
    override init(frame: CGRect) {
        super.init(frame: frame)
        
        titleLabel.font = .body_xl
        titleLabel.textColor = .text_5
        titleLabel.textAlignment = .center
        addSubview(titleLabel)
        titleLabel.snp.makeConstraints { make in
            make.center.equalToSuperview()
        }
    }
    
    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
}