// Copyright 2023 Google LLC
//
// 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.

/// A Dynamic Color theme that is intentionally detached from the input color.
public class SchemeExpressive: DynamicScheme {
  /// Hues used at breakpoints such that designers can specify a hue rotation
  /// that occurs at a given break point.
  static let hues: [Double] = [0, 21, 51, 121, 151, 191, 271, 321, 360]

  /// Hue rotations of the Secondary [TonalPalette], corresponding to the
  /// breakpoints in [hues].
  static let secondaryRotations: [Double] = [
    45,
    95,
    45,
    20,
    45,
    90,
    45,
    45,
    45,
  ]

  /// Hue rotations of the Tertiary [TonalPalette], corresponding to the
  /// breakpoints in [hues].
  static let tertiaryRotations: [Double] = [
    120,
    120,
    20,
    45,
    20,
    15,
    20,
    120,
    120,
  ]

  public init(sourceColorHct: Hct, isDark: Bool, contrastLevel: Double) {
    super.init(
      sourceColorArgb: sourceColorHct.toInt(),
      variant: Variant.expressive,
      isDark: isDark,
      contrastLevel: contrastLevel,
      primaryPalette: TonalPalette.of(
        MathUtils.sanitizeDegreesDouble(sourceColorHct.hue + 240.0),
        40.0
      ),
      secondaryPalette: TonalPalette.of(
        DynamicScheme.getRotatedHue(
          sourceColorHct, SchemeExpressive.hues, SchemeExpressive.secondaryRotations),
        24.0
      ),
      tertiaryPalette: TonalPalette.of(
        DynamicScheme.getRotatedHue(
          sourceColorHct, SchemeExpressive.hues, SchemeExpressive.tertiaryRotations),
        32.0
      ),
      neutralPalette: TonalPalette.of(sourceColorHct.hue + 15, 8.0),
      neutralVariantPalette: TonalPalette.of(sourceColorHct.hue + 15, 12.0)
    )
  }
}
