//
//  OrderListView.swift
//  suixinkan
//

import SnapKit
import UIKit

/// 订单列表容器，含下拉刷新与分页。
final class OrderListView: UIView {

    enum Mode {
        case photographer
        case store
    }

    var onRefresh: (() -> Void)?
    var onLoadMore: ((Int) -> Void)?

    let tableView = UITableView(frame: .zero, style: .plain)
    private let refreshControl = UIRefreshControl()
    private let footerLabel = UILabel()

    override init(frame: CGRect) {
        super.init(frame: frame)
        backgroundColor = UIColor(hex: 0xF5F5F5)
        tableView.backgroundColor = .clear
        tableView.separatorStyle = .none
        tableView.keyboardDismissMode = .onDrag
        tableView.refreshControl = refreshControl
        refreshControl.addTarget(self, action: #selector(refreshTriggered), for: .valueChanged)

        footerLabel.font = .systemFont(ofSize: 12)
        footerLabel.textColor = UIColor(hex: 0x9CA3AF)
        footerLabel.textAlignment = .center
        footerLabel.text = "没有更多"

        addSubview(tableView)
        tableView.snp.makeConstraints { make in
            make.edges.equalToSuperview()
        }
    }

    @available(*, unavailable)
    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }

    func apply(isRefreshing: Bool, canLoadMore: Bool, isEmpty: Bool) {
        if isRefreshing {
            if !refreshControl.isRefreshing { refreshControl.beginRefreshing() }
        } else {
            refreshControl.endRefreshing()
        }
        footerLabel.text = isEmpty ? "暂无订单" : (canLoadMore ? "" : "没有更多")
        tableView.tableFooterView = footerLabelFrame(isEmpty: isEmpty, canLoadMore: canLoadMore)
    }

    private func footerLabelFrame(isEmpty: Bool, canLoadMore: Bool) -> UIView? {
        guard !canLoadMore || isEmpty else { return nil }
        footerLabel.frame = CGRect(x: 0, y: 0, width: bounds.width, height: 44)
        return footerLabel
    }

    @objc private func refreshTriggered() {
        onRefresh?()
    }

    func notifyLoadMoreIfNeeded(at index: Int, shouldLoad: Bool) {
        guard shouldLoad else { return }
        onLoadMore?(index)
    }
}