import Eureka

class MyFormViewController: FormViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        form +++ Section("Section1")
            <<< TextRow(){ row in
                row.title = "Text Row"
                row.placeholder = "Enter text here"
            }
            <<< PhoneRow(){
                $0.title = "Phone Row"
                $0.placeholder = "And numbers here"
            }
        +++ Section("Section2")
            <<< DateRow(){
                $0.title = "Date Row"
                $0.value = Date(timeIntervalSinceReferenceDate: 0)
            }
    }
}

class MyFormViewController: FormViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        form = ...

	// Enables the navigation accessory and stops navigation when a disabled row is encountered
	navigationOptions = RowNavigationOptions.Enabled.union(.StopDisabledRow)
	// Enables smooth scrolling on navigation to off-screen rows
	animateScroll = true
	// Leaves 20pt of space between the keyboard and the highlighted row after scrolling to an off screen row
	rowKeyboardSpacing = 20
    }
}

// Get the value of a single row
let row: TextRow? = form.rowBy(tag: "MyRowTag")
let value = row.value

// Get the value of all rows which have a Tag assigned
// The dictionary contains the 'rowTag':value pairs.
let valuesDictionary = form.values()

form +++ Section()

// Chain it to add multiple Sections
form +++ Section("First Section") +++ Section("Another Section")

// Or use it with rows and get a blank section for free
form +++ TextRow()
     +++ TextRow()  // Each row will be on a separate section

form +++ Section()
        <<< TextRow()
        <<< DateRow()

// Or implicitly create the Section
form +++ TextRow()
        <<< DateRow()

// Append Sections into a Form
form += [Section("A"), Section("B"), Section("C")]

// Append Rows into a Section
section += [TextRow(), DateRow()]

let row  = SwitchRow("SwitchRow") { row in      // initializer
                        row.title = "The title"
                    }.onChange { row in
                        row.title = (row.value ?? false) ? "The title expands when on" : "The title"
                        row.updateCell()
                    }.cellSetup { cell, row in
                        cell.backgroundColor = .lightGray
                    }.cellUpdate { cell, row in
                        cell.textLabel?.font = .italicSystemFont(ofSize: 18.0)
                }

Section("Title")

Section(header: "Title", footer: "Footer Title")

Section(footer: "Footer Title")

Section() { section in
    var header = HeaderFooterView<MyHeaderNibFile>(.nibFile(name: "MyHeaderNibFile", bundle: nil))

    // Will be called every time the header appears on screen
    header.onSetupView = { view, _ in
        // Commonly used to setup texts inside the view
        // Don't change the view hierarchy or size here!
    }
    section.header = header
}

Section(){ section in
    var header = HeaderFooterView<MyCustomUIView>(.class)
    header.height = {100}
    header.onSetupView = { view, _ in
        view.backgroundColor = .red
    }
    section.header = header
}

Section(){ section in
    section.header = {
          var header = HeaderFooterView<UIView>(.callback({
              let view = UIView(frame: CGRect(x: 0, y: 0, width: 100, height: 100))
              view.backgroundColor = .red
              return view
          }))
          header.height = { 100 }
          return header
        }()
}

Condition.function([String], (Form)->Bool)

form +++ Section()
            <<< SwitchRow("switchRowTag"){
                $0.title = "Show message"
            }
            <<< LabelRow(){

                $0.hidden = Condition.function(["switchRowTag"], { form in
                    return !((form.rowBy(tag: "switchRowTag") as? SwitchRow)?.value ?? false)
                })
                $0.title = "Switch is on!"
        }

public enum Condition {
    case function([String], (Form)->Bool)
    case predicate(NSPredicate)
}

$0.hidden = Condition.predicate(NSPredicate(format: "$switchTag == false"))

$0.hidden = "$switchTag == false"

$0.hidden = true

form +++ SelectableSection<ListCheckRow<String>>("Where do you live", selectionType: .singleSelection(enableDeselection: true))

let continents = ["Africa", "Antarctica", "Asia", "Australia", "Europe", "North America", "South America"]
for option in continents {
    form.last! <<< ListCheckRow<String>(option){ listRow in
        listRow.title = option
        listRow.selectableValue = option
        listRow.value = nil
    }
}

public protocol SelectableRowType : RowType {
    var selectableValue : Value? { get set }
}

form +++
    MultivaluedSection(multivaluedOptions: [.Reorder, .Insert, .Delete],
                       header: "Multivalued TextField",
                       footer: ".Insert adds a 'Add Item' (Add New Tag) button row as last cell.") {
        $0.addButtonProvider = { section in
            return ButtonRow(){
                $0.title = "Add New Tag"
            }
        }
        $0.multivaluedRowToInsertAt = { index in
            return NameRow() {
                $0.placeholder = "Tag Name"
            }
        }
        $0 <<< NameRow() {
            $0.placeholder = "Tag Name"
        }
    }

GenericMultivaluedSection<LabelRow>(multivaluedOptions: [.Reorder, .Insert, .Delete], {
    $0.addButtonProvider = { section in
        return LabelRow(){
            $0.title = "A Label row as add button"
        }
    }
    // ...
}

override func viewDidLoad() {
        super.viewDidLoad()
        form
          +++ Section(header: "Required Rule", footer: "Options: Validates on change")

            <<< TextRow() {
                $0.title = "Required Rule"
                $0.add(rule: RuleRequired())

		// This could also have been achieved using a closure that returns nil if valid, or a ValidationError otherwise.
		/*
		let ruleRequiredViaClosure = RuleClosure<String> { rowValue in
		return (rowValue == nil || rowValue!.isEmpty) ? ValidationError(msg: "Field required!") : nil
		}
		$0.add(rule: ruleRequiredViaClosure)
		*/

                $0.validationOptions = .validatesOnChange
            }
            .cellUpdate { cell, row in
                if !row.isValid {
                    cell.titleLabel?.textColor = .systemRed
                }
            }

          +++ Section(header: "Email Rule, Required Rule", footer: "Options: Validates on change after blurred")

            <<< TextRow() {
                $0.title = "Email Rule"
                $0.add(rule: RuleRequired())
                $0.add(rule: RuleEmail())
                $0.validationOptions = .validatesOnChangeAfterBlurred
            }
            .cellUpdate { cell, row in
                if !row.isValid {
                    cell.titleLabel?.textColor = .systemRed
                }
            }

var rules = RuleSet<String>()
rules.add(rule: RuleRequired())
rules.add(rule: RuleEmail())

let row = TextRow() {
            $0.title = "Email Rule"
            $0.add(ruleSet: rules)
            $0.validationOptions = .validatesOnChangeAfterBlurred
        }

let row = TextRow() {
            let deleteAction = SwipeAction(
                style: .destructive,
                title: "Delete",
                handler: { (action, row, completionHandler) in
                    //add your code here.
                    //make sure you call the completionHandler once done.
                    completionHandler?(true)
                })
            deleteAction.image = UIImage(named: "icon-trash")

            $0.trailingSwipe.actions = [deleteAction]
            $0.trailingSwipe.performsFirstActionWithFullSwipe = true

            //please be aware: `leadingSwipe` is only available on iOS 11+ only
            let infoAction = SwipeAction(
                style: .normal,
                title: "Info",
                handler: { (action, row, completionHandler) in
                    //add your code here.
                    //make sure you call the completionHandler once done.
                    completionHandler?(true)
                })
            infoAction.actionBackgroundColor = .blue
            infoAction.image = UIImage(named: "icon-info")

            $0.leadingSwipe.actions = [infoAction]
            $0.leadingSwipe.performsFirstActionWithFullSwipe = true
        }

// Custom Cell with value type: Bool
// The cell is defined using a .xib, so we can set outlets :)
public class CustomCell: Cell<Bool>, CellType {
    @IBOutlet weak var switchControl: UISwitch!
    @IBOutlet weak var label: UILabel!

    public override func setup() {
        super.setup()
        switchControl.addTarget(self, action: #selector(CustomCell.switchValueChanged), for: .valueChanged)
    }

    func switchValueChanged(){
        row.value = switchControl.on
        row.updateCell() // Re-draws the cell which calls 'update' bellow
    }

    public override func update() {
        super.update()
        backgroundColor = (row.value ?? false) ? .white : .black
    }
}

// The custom Row also has the cell: CustomCell and its correspond value
public final class CustomRow: Row<CustomCell>, RowType {
    required public init(tag: String?) {
        super.init(tag: tag)
        // We set the cellProvider to load the .xib corresponding to our cell
        cellProvider = CellProvider<CustomCell>(nibName: "CustomCell")
    }
}

class PickerInlineRow<T> : Row<PickerInlineCell<T>> where T: Equatable {

    public typealias InlineRow = PickerRow<T>
    open var options = [T]()

    required public init(tag: String?) {
        super.init(tag: tag)
    }

    public func setupInlineRow(_ inlineRow: InlineRow) {
        inlineRow.options = self.options
        inlineRow.displayValueFor = self.displayValueFor
        inlineRow.cell.height = { UITableViewAutomaticDimension }
    }
}

func expandInlineRow()
func collapseInlineRow()
func toggleInlineRow()

public override func customDidSelect() {
    super.customDidSelect()
    if !isDisabled {
        toggleInlineRow()
    }
}

public protocol PresenterRowType: TypedRowType {

     associatedtype PresentedControllerType : UIViewController, TypedRowControllerType

     /// Defines how the view controller will be presented, pushed, etc.
     var presentationMode: PresentationMode<PresentedControllerType>? { get set }

     /// Will be called before the presentation occurs.
     var onPresentCallback: ((FormViewController, PresentedControllerType) -> Void)? { get set }
}

/// Generic row type where a user must select a value among several options.
open class SelectorRow<Cell: CellType>: OptionsRow<Cell>, PresenterRowType where Cell: BaseCell {


    /// Defines how the view controller will be presented, pushed, etc.
    open var presentationMode: PresentationMode<SelectorViewController<SelectorRow<Cell>>>?

    /// Will be called before the presentation occurs.
    open var onPresentCallback: ((FormViewController, SelectorViewController<SelectorRow<Cell>>) -> Void)?

    required public init(tag: String?) {
        super.init(tag: tag)
    }

    /**
     Extends `didSelect` method
     */
    open override func customDidSelect() {
        super.customDidSelect()
        guard let presentationMode = presentationMode, !isDisabled else { return }
        if let controller = presentationMode.makeController() {
            controller.row = self
            controller.title = selectorTitle ?? controller.title
            onPresentCallback?(cell.formViewController()!, controller)
            presentationMode.present(controller, row: self, presentingController: self.cell.formViewController()!)
        } else {
            presentationMode.present(nil, row: self, presentingController: self.cell.formViewController()!)
        }
    }

    /**
     Prepares the pushed row setting its title and completion callback.
     */
    open override func prepare(for segue: UIStoryboardSegue) {
        super.prepare(for: segue)
        guard let rowVC = segue.destination as Any as? SelectorViewController<SelectorRow<Cell>> else { return }
        rowVC.title = selectorTitle ?? rowVC.title
        rowVC.onDismissCallback = presentationMode?.onDismissCallback ?? rowVC.onDismissCallback
        onPresentCallback?(cell.formViewController()!, rowVC)
        rowVC.row = self
    }
}


// SelectorRow conforms to PresenterRowType
public final class CustomPushRow<T: Equatable>: SelectorRow<PushSelectorCell<T>>, RowType {

    public required init(tag: String?) {
        super.init(tag: tag)
        presentationMode = .show(controllerProvider: ControllerProvider.callback {
            return SelectorViewController<T>(){ _ in }
            }, onDismiss: { vc in
                _ = vc.navigationController?.popViewController(animated: true)
        })
    }
}

<<< PostalAddressRow() {
     $0.cellProvider = CellProvider<PostalAddressCell>(nibName: "CustomNib", bundle: Bundle.main)
}

public protocol FormatterProtocol {
    func getNewPosition(forPosition forPosition: UITextPosition, inTextInput textInput: UITextInput, oldValue: String?, newValue: String?) -> UITextPosition
}

<<< ActionSheetRow<String>() {
                $0.title = "ActionSheetRow"
                $0.selectorTitle = "Pick a number"
                $0.options = ["One","Two","Three"]
                $0.value = "Two"    // initially selected
            }

/// Block variable used to get the String that should be displayed for the value of this row.
public var displayValueFor: ((T?) -> String?)? = {
    return $0.map { String(describing: $0) }
}

public func rowBy<T: Equatable>(tag: String) -> RowOf<T>?
public func rowBy<Row: RowType>(tag: String) -> Row?
public func rowBy(tag: String) -> BaseRow?

let dateRow : DateRow? = form.rowBy(tag: "dateRowTag")
let labelRow: LabelRow? = form.rowBy(tag: "labelRowTag")

let dateRow2: Row<DateCell>? = form.rowBy(tag: "dateRowTag")

let labelRow2: BaseRow? = form.rowBy(tag: "labelRowTag")

let section: Section?  = form.sectionBy(tag: "sectionTag")

form.setValues(["IntRowTag": 8, "TextRowTag": "Hello world!", "PushRowTag": Company(name:"Xmartlabs")])

section.header = HeaderFooterView(title: "Header title \(variable)") // use String interpolation
//or
var header = HeaderFooterView<UIView>(.class) // most flexible way to set up a header using any view type
header.height = { 60 }  // height can be calculated
header.onSetupView = { view, section in  // each time the view is about to be displayed onSetupView is invoked.
    view.backgroundColor = .orange
}
section.header = header

section.reload()

let row = PushRow<Emoji>() {
              $0.title = "PushRow"
              $0.options = [💁🏻, 🍐, 👦🏼, 🐗, 🐼, 🐻]
              $0.value = 👦🏼
              $0.selectorTitle = "Choose an Emoji!"
          }.onPresent { from, to in
              to.dismissOnSelection = false
              to.dismissOnChange = false
              to.selectableRowSetup = { row in
                  row.cellProvider = CellProvider<ListCheckCell<Emoji>>(nibName: "EmojiCell", bundle: Bundle.main)
              }
              to.selectableRowCellUpdate = { cell, row in
                  cell.textLabel?.text = "Text " + row.selectableValue!  // customization
                  cell.detailTextLabel?.text = "Detail " +  row.selectableValue!
              }
          }

extension RangeReplaceableCollection {
    public mutating func append(_ newElement: Self.Element)
    public mutating func append<S>(contentsOf newElements: S) where S : Sequence, Self.Element == S.Element
    public mutating func insert(_ newElement: Self.Element, at i: Self.Index)
    public mutating func insert<S>(contentsOf newElements: S, at i: Self.Index) where S : Collection, Self.Element == S.Element
    public mutating func remove(at i: Self.Index) -> Self.Element
    public mutating func removeSubrange(_ bounds: Range<Self.Index>)
    public mutating func removeFirst(_ n: Int)
    public mutating func removeFirst() -> Self.Element
    public mutating func removeAll(keepingCapacity keepCapacity: Bool)
    public mutating func reserveCapacity(_ n: Self.IndexDistance)
}

public func +++(left: Form, right: Section) -> Form {
    left.append(right)
    return left
}

public func +=<C : Collection>(inout lhs: Form, rhs: C) where C.Element == Section {
    lhs.append(contentsOf: rhs)
}

public func <<<(left: Section, right: BaseRow) -> Section {
    left.append(right)
    return left
}

public func +=<C : Collection>(inout lhs: Section, rhs: C) where C.Element == BaseRow {
    lhs.append(contentsOf: rhs)
}