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

import UIKit

/// 摄影师项目管理页。
final class ProjectManagementViewController: ModuleTableViewController {
    private let viewModel = ProjectManagementViewModel()

    override func viewDidLoad() {
        title = "项目管理"
        navigationItem.rightBarButtonItem = UIBarButtonItem(
            title: "新建",
            style: .plain,
            target: self,
            action: #selector(createProject)
        )
        super.viewDidLoad()
        wireViewModel(viewModel) { }
    }

    override func tableRowCount() -> Int { viewModel.items.count }

    override func configureCell(_ cell: TitleSubtitleTableViewCell, at indexPath: IndexPath) {
        let item = viewModel.items[indexPath.row]
        cell.configure(title: item.name, subtitle: item.statusName, detail: "¥\(item.price)")
    }

    override func didSelectTableRow(at indexPath: IndexPath) {
        let item = viewModel.items[indexPath.row]
        navigationController?.pushViewController(
            ProjectDetailViewController(projectId: item.id, storeMode: false),
            animated: true
        )
    }

    override func reloadContent() async {
        await viewModel.reload(api: services.projectAPI, scenicId: services.currentScenicId)
    }

    @objc private func createProject() {
        navigationController?.pushViewController(
            ProjectEditorViewController(projectId: nil),
            animated: true
        )
    }
}

extension ProjectManagementViewModel: ViewModelBindable {}

/// 店铺项目管理页。
final class StoreProjectManagementViewController: ModuleTableViewController {
    private let viewModel = StoreProjectManagementViewModel()

    override func viewDidLoad() {
        title = "店铺项目"
        super.viewDidLoad()
        wireViewModel(viewModel) { }
    }

    override func tableRowCount() -> Int { viewModel.filteredItems.count }

    override func configureCell(_ cell: TitleSubtitleTableViewCell, at indexPath: IndexPath) {
        let item = viewModel.filteredItems[indexPath.row]
        cell.configure(title: item.name, subtitle: item.typeName, detail: "¥\(item.price)")
    }

    override func didSelectTableRow(at indexPath: IndexPath) {
        let item = viewModel.filteredItems[indexPath.row]
        navigationController?.pushViewController(
            ProjectDetailViewController(projectId: item.id, storeMode: true),
            animated: true
        )
    }

    override func reloadContent() async {
        await viewModel.reload(api: services.projectAPI, userId: services.userId)
    }
}

extension StoreProjectManagementViewModel: ViewModelBindable {}

/// 项目详情页。
final class ProjectDetailViewController: ModuleTableViewController {
    private let projectId: Int
    private let storeMode: Bool
    private let photographerViewModel = ProjectManagementViewModel()
    private let storeViewModel = StoreProjectManagementViewModel()

    init(projectId: Int, storeMode: Bool) {
        self.projectId = projectId
        self.storeMode = storeMode
        super.init(nibName: nil, bundle: nil)
    }

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

    override func viewDidLoad() {
        title = "项目详情"
        super.viewDidLoad()
        if storeMode {
            storeViewModel.onChange = { [weak self] in self?.reloadTable() }
        } else {
            photographerViewModel.onChange = { [weak self] in self?.reloadTable() }
        }
    }

    private var detail: PhotographerProjectDetailResponse? {
        storeMode ? storeViewModel.selectedDetail : photographerViewModel.selectedDetail
    }

    override func tableRowCount() -> Int {
        detail == nil ? 0 : 4
    }

    override func configureCell(_ cell: TitleSubtitleTableViewCell, at indexPath: IndexPath) {
        guard let detail else { return }
        switch indexPath.row {
        case 0: cell.configure(title: "项目名称", subtitle: detail.name)
        case 1: cell.configure(title: "简介", subtitle: detail.description)
        case 2: cell.configure(title: "价格", subtitle: detail.price)
        default: cell.configure(title: "打卡点", subtitle: "\(detail.scenicList.count) 个")
        }
    }

    override func reloadContent() async {
        if storeMode {
            await storeViewModel.loadDetail(id: projectId, api: services.projectAPI)
        } else {
            await photographerViewModel.loadDetail(id: projectId, api: services.projectAPI)
        }
    }
}

/// 摄影师项目编辑页。
final class ProjectEditorViewController: ModuleTableViewController {
    private let viewModel = ProjectEditorViewModel(mode: .create)
    private let nameField = UITextField()
    private let descriptionField = UITextField()
    private let priceField = UITextField()
    private let projectId: Int?

    init(projectId: Int?) {
        self.projectId = projectId
        super.init(nibName: nil, bundle: nil)
    }

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

    override func viewDidLoad() {
        title = projectId == nil ? "新建项目" : "编辑项目"
        navigationItem.rightBarButtonItem = UIBarButtonItem(
            title: "保存",
            style: .done,
            target: self,
            action: #selector(save)
        )
        super.viewDidLoad()
        setupHeader()
        wireViewModel(viewModel) { [weak self] in self?.fillFormIfNeeded() }
    }

    private func setupHeader() {
        nameField.placeholder = "项目名称"
        nameField.borderStyle = .roundedRect
        descriptionField.placeholder = "项目简介"
        descriptionField.borderStyle = .roundedRect
        priceField.placeholder = "价格"
        priceField.borderStyle = .roundedRect
        priceField.keyboardType = .decimalPad
        let stack = UIStackView(arrangedSubviews: [nameField, descriptionField, priceField])
        stack.axis = .vertical
        stack.spacing = 8
        stack.frame = CGRect(x: 0, y: 0, width: view.bounds.width, height: 132)
        stack.layoutMargins = UIEdgeInsets(top: 12, left: 16, bottom: 12, right: 16)
        stack.isLayoutMarginsRelativeArrangement = true
        tableView.tableHeaderView = stack
    }

    override func tableRowCount() -> Int { 0 }

    override func reloadContent() async {
        guard let projectId else { return }
        if let detail = try? await services.projectAPI.projectDetail(id: projectId) {
            viewModel.apply(detail)
            fillFormIfNeeded()
        }
    }

    private func fillFormIfNeeded() {
        if nameField.text?.isEmpty != false { nameField.text = viewModel.name }
        if descriptionField.text?.isEmpty != false { descriptionField.text = viewModel.descriptionText }
        if priceField.text?.isEmpty != false { priceField.text = viewModel.price }
    }

    @objc private func save() {
        viewModel.name = nameField.text ?? ""
        viewModel.descriptionText = descriptionField.text ?? ""
        viewModel.price = priceField.text ?? ""
        Task {
            let userId = Int(services.userId ?? "")
            let success = await viewModel.submit(
                scenicId: services.currentScenicId,
                userId: userId,
                api: services.projectAPI,
                uploadService: services.ossUploadService
            )
            if success {
                navigationController?.popViewController(animated: true)
            } else if let message = viewModel.errorMessage {
                services.toastCenter.show(message)
            }
        }
    }
}

extension ProjectEditorViewModel: ViewModelBindable {}

/// 店铺项目编辑页。
final class StoreProjectEditorViewController: ModuleTableViewController {
    private let viewModel = StoreProjectEditorViewModel(mode: .create)
    private let nameField = UITextField()

    init(projectId: Int?) {
        super.init(nibName: nil, bundle: nil)
    }

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

    override func viewDidLoad() {
        title = "店铺项目"
        navigationItem.rightBarButtonItem = UIBarButtonItem(
            title: "保存",
            style: .done,
            target: self,
            action: #selector(save)
        )
        super.viewDidLoad()
        nameField.placeholder = "项目名称"
        nameField.borderStyle = .roundedRect
        nameField.frame = CGRect(x: 0, y: 0, width: view.bounds.width, height: 52)
        tableView.tableHeaderView = nameField
        wireViewModel(viewModel) { }
    }

    override func tableRowCount() -> Int { viewModel.scenicList.count }

    override func configureCell(_ cell: TitleSubtitleTableViewCell, at indexPath: IndexPath) {
        let scenic = viewModel.scenicList[indexPath.row]
        cell.configure(title: scenic.name, subtitle: viewModel.selectedScenicIds.contains(scenic.id) ? "已选择" : nil)
    }

    override func reloadContent() async {
        guard let userId = Int(services.userId ?? "") else { return }
        await viewModel.loadScenicList(api: services.projectAPI, userId: userId)
    }

    @objc private func save() {
        viewModel.name = nameField.text ?? ""
        Task {
            guard let userId = Int(services.userId ?? "") else { return }
            let success = await viewModel.submit(
                userId: userId,
                api: services.projectAPI,
                uploadService: services.ossUploadService
            )
            if success { navigationController?.popViewController(animated: true) }
        }
    }
}

extension StoreProjectEditorViewModel: ViewModelBindable {}