// Copyright 2016-present the Material Components for iOS authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

// swiftlint:disable function_body_length
// swiftlint:disable type_body_length

import XCTest
import MaterialComponents.MaterialMath
import MaterialComponents.MaterialPalettes
import MaterialComponents.MaterialTextFields

class TextFieldControllerDefaultLegacyTests: XCTestCase {
  func testCopyingLegacyDefault() {
    let textField = MDCTextField()

    let controller = MDCTextInputControllerLegacyDefault(textInput: textField)
    controller.characterCountMax = 49
    controller.characterCountViewMode = .always
    controller.disabledColor = .orange
    controller.isFloatingEnabled = false
    controller.floatingPlaceholderNormalColor = .purple
    controller.floatingPlaceholderScale = 0.1
    controller.placeholderText = "Placeholder"
    controller.helperText = "Helper"
    controller.inlinePlaceholderColor = .green
    controller.activeColor = .blue
    controller.normalColor = .white
    controller.underlineViewMode = .always
    controller.leadingUnderlineLabelTextColor = .yellow
    controller.trailingUnderlineLabelTextColor = .orange

    if let controllerCopy = controller.copy() as? MDCTextInputControllerLegacyDefault {
      XCTAssertEqual(controller.characterCountMax, controllerCopy.characterCountMax)
      XCTAssertEqual(controller.characterCountViewMode, controllerCopy.characterCountViewMode)
      XCTAssertEqual(controller.disabledColor, controllerCopy.disabledColor)
      XCTAssertEqual(controller.isFloatingEnabled, controllerCopy.isFloatingEnabled)
      XCTAssertEqual(controller.floatingPlaceholderNormalColor, controllerCopy.floatingPlaceholderNormalColor)
      XCTAssertEqual(controller.floatingPlaceholderScale, controllerCopy.floatingPlaceholderScale)
      XCTAssertEqual(controller.placeholderText, controllerCopy.placeholderText)
      XCTAssertEqual(controller.helperText, controllerCopy.helperText)
      XCTAssertEqual(controller.inlinePlaceholderColor, controllerCopy.inlinePlaceholderColor)
      XCTAssertEqual(controller.activeColor, controllerCopy.activeColor)
      XCTAssertEqual(controller.normalColor, controllerCopy.normalColor)
      XCTAssertEqual(controller.underlineViewMode, controllerCopy.underlineViewMode)
      XCTAssertEqual(controller.leadingUnderlineLabelTextColor,
                     controllerCopy.leadingUnderlineLabelTextColor)
      XCTAssertEqual(controller.trailingUnderlineLabelTextColor,
                     controllerCopy.trailingUnderlineLabelTextColor)
    } else {
      XCTFail("No copy or copy is wrong class")
    }
  }

  func testCopyingLegacyFullWidth() {
    let textField = MDCTextField()

    let controller = MDCTextInputControllerLegacyFullWidth(textInput: textField)
    controller.characterCountMax = 49
    controller.characterCountViewMode = .always
    controller.disabledColor = .yellow
    controller.placeholderText = "Placeholder"
    controller.helperText = "Helper"
    controller.inlinePlaceholderColor = .green
    controller.activeColor = .blue
    controller.normalColor = .white
    controller.underlineViewMode = .always
    controller.trailingUnderlineLabelTextColor = .purple

    if let controllerCopy = controller.copy() as? MDCTextInputControllerLegacyFullWidth {
      XCTAssertEqual(controller.characterCountMax, controllerCopy.characterCountMax)
      XCTAssertEqual(controller.characterCountViewMode, controllerCopy.characterCountViewMode)
      XCTAssertEqual(controller.disabledColor, controllerCopy.disabledColor)
      XCTAssertEqual(controller.placeholderText, controllerCopy.placeholderText)
      XCTAssertEqual(controller.helperText, controllerCopy.helperText)
      XCTAssertEqual(controller.inlinePlaceholderColor, controllerCopy.inlinePlaceholderColor)
      XCTAssertEqual(controller.activeColor, controllerCopy.activeColor)
      XCTAssertEqual(controller.normalColor, controllerCopy.normalColor)
      XCTAssertEqual(controller.underlineViewMode, controllerCopy.underlineViewMode)
      XCTAssertEqual(controller.trailingUnderlineLabelTextColor,
                     controllerCopy.trailingUnderlineLabelTextColor)
    } else {
      XCTFail("No copy or copy is wrong class")
    }
  }

  func testDynamicTypeLegacyDefault() {
    let textField = MDCTextField()

    XCTAssertFalse(textField.mdc_adjustsFontForContentSizeCategory)
    textField.mdc_adjustsFontForContentSizeCategory = true
    XCTAssertTrue(textField.mdc_adjustsFontForContentSizeCategory)

    let controller = MDCTextInputControllerLegacyDefault(textInput: textField)
    XCTAssertNotNil(controller.textInput)

    controller.mdc_adjustsFontForContentSizeCategory = true
    XCTAssertTrue(controller.mdc_adjustsFontForContentSizeCategory)

    // The controller takes over listening for dynamic type size changes.
    XCTAssertFalse(textField.mdc_adjustsFontForContentSizeCategory)
  }

  func testDynamicTypeLegacyFullWidth() {
    let textField = MDCTextField()

    XCTAssertFalse(textField.mdc_adjustsFontForContentSizeCategory)
    textField.mdc_adjustsFontForContentSizeCategory = true
    XCTAssertTrue(textField.mdc_adjustsFontForContentSizeCategory)

    let controller = MDCTextInputControllerLegacyFullWidth(textInput: textField)
    XCTAssertNotNil(controller.textInput)

    controller.mdc_adjustsFontForContentSizeCategory = true
    XCTAssertTrue(controller.mdc_adjustsFontForContentSizeCategory)

    // The controller takes over listening for dynamic type size changes.
    XCTAssertFalse(textField.mdc_adjustsFontForContentSizeCategory)
  }

  func testCharacterMaxLegacyDefault() {
    let textField = MDCTextField()
    let controller = MDCTextInputControllerLegacyDefault(textInput: textField)

    let altLeading = "Alternative Helper Test"
    controller.helperText = altLeading

    controller.characterCountMax = 50

    // By setting the folowing text with is 51 characters when the max is set to 50 characters, it
    // should trigger an error state.
    textField.text = "Lorem ipsum dolor sit amet, consectetuer adipiscing"

    XCTAssertTrue("51 / 50".isEqual(textField.trailingUnderlineLabel.text))
    XCTAssertEqual(MDCPalette.red.accent400, textField.underline?.color)
    XCTAssertEqual(MDCPalette.red.accent400, textField.trailingUnderlineLabel.textColor)
  }

  func testCharacterMaxLegacyFullWidth() {
    let textField = MDCTextField()
    let controller = MDCTextInputControllerLegacyFullWidth(textInput: textField)

    let altLeading = "Alternative Helper Test"
    controller.helperText = altLeading

    controller.characterCountMax = 50

    // By setting the folowing text with is 51 characters when the max is set to 50 characters, it
    // should trigger an error state.
    textField.text = "Lorem ipsum dolor sit amet, consectetuer adipiscing"

    XCTAssertTrue("51 / 50".isEqual(textField.trailingUnderlineLabel.text))
    XCTAssertEqual(MDCPalette.red.accent400, textField.trailingUnderlineLabel.textColor)
  }

  func testErrorsLegacyDefault() {
    let textField = MDCTextField()
    let controller = MDCTextInputControllerLegacyDefault(textInput: textField)

    // Helper text is shown on the leading underline label. Make sure the color and content are as
    // expected.
    let altLeading = "Alternative Helper Test"
    controller.helperText = altLeading
    controller.leadingUnderlineLabelTextColor = .green

    XCTAssertEqual(.green, textField.leadingUnderlineLabel.textColor)
    XCTAssertEqual(altLeading, textField.leadingUnderlineLabel.text)

    controller.trailingUnderlineLabelTextColor = .white
    XCTAssertEqual(textField.trailingUnderlineLabel.textColor, .white)

    XCTAssertNil(controller.errorText)

    // Setting error text should change the color and content of the leading underline label
    let error = "Error Test"
    controller.setErrorText(error, errorAccessibilityValue: nil)
    XCTAssertNotEqual(altLeading, textField.leadingUnderlineLabel.text)
    XCTAssertEqual(error, textField.leadingUnderlineLabel.text)
    XCTAssertEqual(error, controller.errorText)

    let newError = "Different Error Test"
    let altErrorAccessibilityValue = "Not the default"
    controller.setErrorText(newError, errorAccessibilityValue: altErrorAccessibilityValue)
    XCTAssertEqual(newError, controller.errorText)
    XCTAssertEqual(newError, textField.leadingUnderlineLabel.text)
    XCTAssertNotEqual(error, controller.errorText)
    XCTAssertNotEqual(error, textField.leadingUnderlineLabel.text)

    // Setting an error should change the leading label's text color.
    XCTAssertNotEqual(.green, textField.leadingUnderlineLabel.textColor)

    // Setting error color should change the color of the underline, leading, and trailing colors.
    controller.errorColor = .blue
    XCTAssertEqual(.blue, controller.errorColor)

    XCTAssertNotEqual(MDCPalette.red.accent400, textField.leadingUnderlineLabel.textColor)
    XCTAssertNotEqual(MDCPalette.red.accent400, textField.trailingUnderlineLabel.textColor)
    XCTAssertNotEqual(MDCPalette.red.accent400, textField.underline?.color)

    XCTAssertEqual(.blue, textField.leadingUnderlineLabel.textColor)
    XCTAssertEqual(.blue, textField.trailingUnderlineLabel.textColor)
    XCTAssertEqual(.blue, textField.underline?.color)

    // If the controller is also in a character max error state, the leading label should still be
    // showing the text from the error that was set.
    controller.setErrorText(error, errorAccessibilityValue: nil)
    controller.characterCountMax = 50
    textField.text = "Lorem ipsum dolor sit amet, consectetuer adipiscing"
    XCTAssertEqual(error, textField.leadingUnderlineLabel.text)

    // Removing the error should set the leading text back to its previous text.
    controller.setErrorText(nil, errorAccessibilityValue: nil)
    XCTAssertNotEqual(error, textField.leadingUnderlineLabel.text)
    XCTAssertEqual(altLeading, textField.leadingUnderlineLabel.text)

    // Test error text being reset but character max still exceded.
    XCTAssertEqual(.blue, textField.leadingUnderlineLabel.textColor)
    XCTAssertEqual(.blue, textField.trailingUnderlineLabel.textColor)
    XCTAssertEqual(.blue, textField.underline?.color)

    // Removing the text should remove the error state from character max and therefore remove
    // anything from showing the error color.
    textField.text = nil
    XCTAssertNotEqual(.blue, textField.leadingUnderlineLabel.textColor)
    XCTAssertNotEqual(.blue, textField.trailingUnderlineLabel.textColor)
    XCTAssertNotEqual(.blue, textField.underline?.color)
  }

  func testFloatingPlaceholderLegacyDefault() {
    let textField = MDCTextField()

    let controller = MDCTextInputControllerLegacyDefault(textInput: textField)
    textField.sizeToFit()

    controller.placeholderText = "Placeholder"
    textField.text = "Set Text"
    textField.setNeedsLayout()
    textField.layoutIfNeeded()

    let estimatedTextFrame = UIEdgeInsetsInsetRect(textField.bounds, controller.textInsets(UIEdgeInsets()))
    XCTAssertFalse(textField.placeholderLabel.frame.intersects(estimatedTextFrame))
  }

  func testLabelsLegacyDefault() {
    let textField = MDCTextField()

    let controller = MDCTextInputControllerLegacyDefault(textInput: textField)

    let placeholderString = "Placeholder"
    controller.placeholderText = placeholderString

    XCTAssertEqual(controller.placeholderText, placeholderString)
    XCTAssertEqual(textField.placeholder, controller.placeholderText)

    let helperString = "Helper"
    controller.helperText = helperString

    XCTAssertEqual(controller.helperText, helperString)
    XCTAssertEqual(textField.leadingUnderlineLabel.text, controller.helperText)
  }

  func testLabelsLegacyFullWidth() {
    let textField = MDCTextField()

    let controller = MDCTextInputControllerLegacyFullWidth(textInput: textField)

    let placeholderString = "Placeholder"
    controller.placeholderText = placeholderString

    XCTAssertEqual(controller.placeholderText, placeholderString)
    XCTAssertEqual(textField.placeholder, controller.placeholderText)

    controller.helperText = "Helper"

    XCTAssertEqual(controller.helperText, nil)
  }

  func testPresentationLegacyDefault() {
    let textField = MDCTextField()
    let controller = MDCTextInputControllerLegacyDefault(textInput: textField)
    XCTAssertEqual(controller.isFloatingEnabled, true)
    controller.isFloatingEnabled = false
    XCTAssertEqual(controller.isFloatingEnabled, false)

    controller.isFloatingEnabled = true
    textField.sizeToFit()
    XCTAssertEqual(textField.frame.height, 70)

    controller.helperText = "Helper"
    textField.sizeToFit()
    XCTAssertEqual(MDCCeil(textField.frame.height), 85.0)

    controller.characterCountViewMode = .never
    XCTAssertEqual(.clear, textField.trailingUnderlineLabel.textColor)
    controller.characterCountViewMode = .always
    XCTAssertNotEqual(.clear, textField.trailingUnderlineLabel.textColor)

    controller.underlineViewMode = .never
    XCTAssertEqual(.lightGray, textField.underline?.color)
    controller.underlineViewMode = .always
    XCTAssertEqual(MDCPalette.blue.accent700, textField.underline?.color)
  }

  func testPresentationLegacyFullWidth() {
    let textField = MDCTextField()
    let controller = MDCTextInputControllerLegacyFullWidth(textInput: textField)

    textField.sizeToFit()
    XCTAssertEqual(textField.frame.height, 57)

    controller.characterCountViewMode = .never
    XCTAssertEqual(.clear, textField.trailingUnderlineLabel.textColor)
    controller.characterCountViewMode = .always
    XCTAssertNotEqual(.clear, textField.trailingUnderlineLabel.textColor)

    controller.underlineViewMode = .never
    XCTAssertEqual(.clear, textField.underline?.color)
    controller.underlineViewMode = .always
    XCTAssertEqual(.clear, textField.underline?.color)

    controller.disabledColor = .red
    XCTAssertEqual(controller.disabledColor, .clear)
  }
}
