import SwiftyFORM
class MyViewController: FormViewController {
	override func populate(_ builder: FormBuilder) {
		builder += StaticTextFormItem().title("Hello").value("World")
	}
}

import SwiftyFORM
class MyViewController: FormViewController {
	override func populate(_ builder: FormBuilder) {
		builder += TextFieldFormItem().title("Email").placeholder("Please specify").keyboardType(.emailAddress)
	}
}

import SwiftyFORM
class MyViewController: FormViewController {
	override func populate(_ builder: FormBuilder) {
		builder += ViewControllerFormItem().title("Go to view controller").viewController(FirstViewController.self)
	}
}

class DatePickerBindingViewController: FormViewController {
	override func populate(_ builder: FormBuilder) {
		builder += datePicker
		builder += incrementButton
		builder += decrementButton
		builder += SectionFormItem()
		builder += summary
		updateSummary()
	}
	
	lazy var datePicker: DatePickerFormItem = {
		let instance = DatePickerFormItem()
		instance.title = "Date"
		instance.datePickerMode = .date
		instance.behavior = .expandedAlways
		instance.valueDidChangeBlock = { [weak self] _ in
			self?.updateSummary()
		}
		return instance
	}()
	
	lazy var incrementButton: ButtonFormItem = {
		let instance = ButtonFormItem()
		instance.title = "Next Day"
		instance.action = { [weak self] in
			self?.increment()
		}
		return instance
	}()
	
	lazy var decrementButton: ButtonFormItem = {
		let instance = ButtonFormItem()
		instance.title = "Previous Day"
		instance.action = { [weak self] in
			self?.decrement()
		}
		return instance
	}()
	
	lazy var summary: StaticTextFormItem = {
		return StaticTextFormItem().title("Date").value("-")
	}()
	
	func updateSummary() {
		summary.value = "\(datePicker.value)"
	}
	
	func offsetDate(_ date: Date, days: Int) -> Date {
		var dateComponents = DateComponents()
		dateComponents.day = days
		let calendar = Calendar.current
		guard let resultDate = calendar.date(byAdding: dateComponents, to: date) else {
			return date
		}
		return resultDate
	}
	
	func increment() {
		datePicker.setValue(offsetDate(datePicker.value, days: 1), animated: true)
		updateSummary()
	}

	func decrement() {
		datePicker.setValue(offsetDate(datePicker.value, days: -1), animated: true)
		updateSummary()
	}
}

class ChangePasswordViewController: FormViewController {
	override func populate(_ builder: FormBuilder) {
		builder.navigationTitle = "Password"
		builder += SectionHeaderTitleFormItem().title("Your Old Password")
		builder += passwordOld
		builder += SectionHeaderTitleFormItem().title("Your New Password")
		builder += passwordNew
		builder += passwordNewRepeated
		builder.alignLeft([passwordOld, passwordNew, passwordNewRepeated])
	}
	
	lazy var passwordOld: TextFieldFormItem = {
		let instance = TextFieldFormItem()
		instance.title("Old password").password().placeholder("required")
		instance.keyboardType = .numberPad
		instance.autocorrectionType = .no
		instance.validate(CharacterSetSpecification.decimalDigitCharacterSet(), message: "Must be digits")
		instance.submitValidate(CountSpecification.min(4), message: "Length must be minimum 4 digits")
		instance.validate(CountSpecification.max(6), message: "Length must be maximum 6 digits")
		return instance
		}()
	
	lazy var passwordNew: TextFieldFormItem = {
		let instance = TextFieldFormItem()
		instance.title("New password").password().placeholder("required")
		instance.keyboardType = .numberPad
		instance.autocorrectionType = .no
		instance.validate(CharacterSetSpecification.decimalDigitCharacterSet(), message: "Must be digits")
		instance.submitValidate(CountSpecification.min(4), message: "Length must be minimum 4 digits")
		instance.validate(CountSpecification.max(6), message: "Length must be maximum 6 digits")
		return instance
		}()
	
	lazy var passwordNewRepeated: TextFieldFormItem = {
		let instance = TextFieldFormItem()
		instance.title("Repeat password").password().placeholder("required")
		instance.keyboardType = .numberPad
		instance.autocorrectionType = .no
		instance.validate(CharacterSetSpecification.decimalDigitCharacterSet(), message: "Must be digits")
		instance.submitValidate(CountSpecification.min(4), message: "Length must be minimum 4 digits")
		instance.validate(CountSpecification.max(6), message: "Length must be maximum 6 digits")
		return instance
		}()
}