//
//  ScheduleViewControllers.swift
//  suixinkan
//
//  Created by Codex on 2026/6/26.
//

import UIKit

/// 排班管理页。
final class ScheduleManagementViewController: ModuleTableViewController {
    private let viewModel = ScheduleManagementViewModel()

    /// 视图加载完成后的 UI 初始化与数据绑定。
    override func viewDidLoad() {
        title = "排班管理"
        navigationItem.rightBarButtonItems = [
            UIBarButtonItem(title: "新增", style: .plain, target: self, action: #selector(addSchedule)),
            UIBarButtonItem(title: "下月", style: .plain, target: self, action: #selector(nextMonth))
        ]
        navigationItem.leftBarButtonItem = UIBarButtonItem(
            title: "上月",
            style: .plain,
            target: self,
            action: #selector(previousMonth)
        )
        super.viewDidLoad()
        wireViewModel(viewModel) { [weak self] in self?.updateTitle() }
    }

    /// table行Count相关逻辑。
    override func tableRowCount() -> Int {
        viewModel.items.count
    }

    /// 配置Cell展示内容。
    override func configureCell(_ cell: TitleSubtitleTableViewCell, at indexPath: IndexPath) {
        let item = viewModel.items[indexPath.row]
        cell.configure(
            title: item.name,
            subtitle: "\(item.startTime) - \(item.endTime)",
            detail: item.orderNumber ?? item.remark
        )
    }

    /// didSelectTableRow 回调处理。
    override func didSelectTableRow(at indexPath: IndexPath) {
        let item = viewModel.items[indexPath.row]
        let alert = UIAlertController(title: item.name, message: "删除该排班？", preferredStyle: .alert)
        alert.addAction(UIAlertAction(title: "取消", style: .cancel))
        alert.addAction(UIAlertAction(title: "删除", style: .destructive) { [weak self] _ in
            guard let self else { return }
            Task { await self.viewModel.delete(item: item, api: self.services.scheduleAPI, scenicId: self.services.currentScenicId) }
        })
        present(alert, animated: true)
    }

    /// 刷新Content。
    override func reloadContent() async {
        await viewModel.reload(api: services.scheduleAPI, scenicId: services.currentScenicId)
        updateTitle()
    }

    /// 更新Title状态。
    private func updateTitle() {
        let month = viewModel.monthDate.scheduleYearMonthText
        title = "排班 \(month)"
    }

    /// previousMonth相关逻辑。
    @objc private func previousMonth() {
        Task { await viewModel.previousMonth(api: services.scheduleAPI, scenicId: services.currentScenicId) }
    }

    /// nextMonth相关逻辑。
    @objc private func nextMonth() {
        Task { await viewModel.nextMonth(api: services.scheduleAPI, scenicId: services.currentScenicId) }
    }

    /// add排班相关逻辑。
    @objc private func addSchedule() {
        navigationController?.pushViewController(ScheduleAddViewController(), animated: true)
    }
}

extension ScheduleManagementViewModel: ViewModelBindable {}

/// 新增排班页。
final class ScheduleAddViewController: ModuleTableViewController {
    private let viewModel = ScheduleAddViewModel()
    private let nameField = UITextField()
    private let remarkField = UITextField()

    /// 视图加载完成后的 UI 初始化与数据绑定。
    override func viewDidLoad() {
        title = "新增排班"
        navigationItem.rightBarButtonItem = UIBarButtonItem(
            title: "提交",
            style: .done,
            target: self,
            action: #selector(submit)
        )
        super.viewDidLoad()
        wireViewModel(viewModel) { }
        setupFormHeader()
    }

    /// 初始化FormHeader相关 UI 或状态。
    private func setupFormHeader() {
        nameField.placeholder = "日程名称"
        nameField.borderStyle = .roundedRect
        remarkField.placeholder = "备注"
        remarkField.borderStyle = .roundedRect
        let stack = UIStackView(arrangedSubviews: [nameField, remarkField])
        stack.axis = .vertical
        stack.spacing = 8
        stack.frame = CGRect(x: 0, y: 0, width: view.bounds.width, height: 96)
        stack.layoutMargins = UIEdgeInsets(top: 12, left: 16, bottom: 12, right: 16)
        stack.isLayoutMarginsRelativeArrangement = true
        tableView.tableHeaderView = stack
    }

    /// table行Count相关逻辑。
    override func tableRowCount() -> Int {
        viewModel.availableOrders.count
    }

    /// 配置Cell展示内容。
    override func configureCell(_ cell: TitleSubtitleTableViewCell, at indexPath: IndexPath) {
        let order = viewModel.availableOrders[indexPath.row]
        let selected = viewModel.draft.selectedOrder?.orderNumber == order.orderNumber
        cell.configure(title: order.orderNumber, subtitle: order.projectName, detail: selected ? "已选择" : nil)
        cell.accessoryType = selected ? .checkmark : .none
    }

    /// didSelectTableRow 回调处理。
    override func didSelectTableRow(at indexPath: IndexPath) {
        viewModel.draft.selectedOrder = viewModel.availableOrders[indexPath.row]
        reloadTable()
    }

    /// 刷新Content。
    override func reloadContent() async {
        await viewModel.loadOrders(api: services.scheduleAPI, scenicId: services.currentScenicId)
    }

    /// 提交。
    @objc private func submit() {
        viewModel.draft.name = nameField.text ?? ""
        viewModel.draft.remark = remarkField.text ?? ""
        Task {
            let start = Date()
            let end = Calendar.current.date(byAdding: .hour, value: 1, to: start) ?? start
            let success = await viewModel.submit(
                api: services.scheduleAPI,
                scenicId: services.currentScenicId,
                startDate: start,
                endDate: end
            )
            if success { navigationController?.popViewController(animated: true) }
        }
    }
}

extension ScheduleAddViewModel: ViewModelBindable {}