//
//  OrderSourcePickerViewController.swift
//  suixinkan
//

import SnapKit
import UIKit

/// 订单来源选择器。
final class OrderSourcePickerViewController: UIViewController, UITableViewDataSource, UITableViewDelegate {

    var onPersonSelected: ((OrderSourcePerson) -> Void)?
    var onLeadSelected: ((OrderSourceSelection) -> Void)?

    private let people: [OrderSourcePerson]
    private let leads: [OrderSourceLead]
    private let selectedPerson: OrderSourcePerson?
    private let tableView = UITableView(frame: .zero, style: .insetGrouped)
    private var showingLeads = false

    init(people: [OrderSourcePerson], leads: [OrderSourceLead], selectedPerson: OrderSourcePerson?) {
        self.people = people
        self.leads = leads
        self.selectedPerson = selectedPerson
        self.showingLeads = !leads.isEmpty
        super.init(nibName: nil, bundle: nil)
    }

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

    override func viewDidLoad() {
        super.viewDidLoad()
        title = showingLeads ? "选择带客单" : "选择获客员"
        view.backgroundColor = UIColor(hex: 0xF5F5F5)
        navigationItem.leftBarButtonItem = UIBarButtonItem(title: "关闭", style: .plain, target: self, action: #selector(closeTapped))
        tableView.dataSource = self
        tableView.delegate = self
        view.addSubview(tableView)
        tableView.snp.makeConstraints { $0.edges.equalToSuperview() }
    }

    @objc private func closeTapped() {
        dismiss(animated: true)
    }

    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        showingLeads ? leads.count : people.count
    }

    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = UITableViewCell(style: .subtitle, reuseIdentifier: nil)
        if showingLeads {
            let lead = leads[indexPath.row]
            cell.textLabel?.text = lead.displayText
            cell.detailTextLabel?.text = lead.userMobile
        } else {
            let person = people[indexPath.row]
            cell.textLabel?.text = person.name
            cell.detailTextLabel?.text = person.phone
        }
        return cell
    }

    func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
        if showingLeads, let person = selectedPerson {
            let lead = leads[indexPath.row]
            onLeadSelected?(OrderSourceSelection(person: person, lead: lead))
            dismiss(animated: true)
        } else {
            onPersonSelected?(people[indexPath.row])
        }
    }
}