export const APP_NAME = 'Music Visualizer';

export type NoteKind = 'attack' | 'sustain';

export type NoteEvent = {
  /** Unique per performance occurrence. */
  eventId: string;
  /** Verovio SVG g.note id, shared by repeated performances of the same notehead. */
  scoreId: string;
  time: number;
  duration: number;
  pitch: number;
  velocity: number;
  staff: number;
  /** SVG user coordinates (outer viewBox). */
  x: number;
  y: number;
  kind: NoteKind;
  grace?: boolean;
};

export type ScrollKey = {
  /** Music seconds. */
  time: number;
  /** Left edge of the visible score in SVG user units. */
  x: number;
};

export type ScoreMeta = {
  title: string;
  subtitle: string;
  composer: string;
  svgWidth: number;
  svgHeight: number;
  /** Last sounding note end, in music seconds. */
  musicDuration: number;
  /** Audio duration, in seconds. */
  audioDuration: number;
  measureCount: number;
  scoreNoteCount: number;
  midiNoteCount: number;
  mappedNoteCount: number;
  warnings: string[];
  unsupported: string[];
};

export type VisualSettings = {
  width: number;
  height: number;
  fps: number;
  introSeconds: number;
  outroSeconds: number;
  /** Score strip height as a fraction of the video height. 0.3 - 0.75. */
  scoreHeightRatio: number;
  /** Active note target position as a fraction of viewport width. 0.25 - 0.6. */
  scrollLead: number;
  paperColor: string;
  /** Paper opacity; 0 makes the score float on the background with no paper at all. */
  paperAlpha: number;
  /** Ink colour for the engraved notation. */
  scoreColor: string;
  background: string;
  staffColors: string[];
  /** Ball radius multiplier around the default. */
  ballScale: number;
  /**
   * Amplifies the orb's jump along the sheet normal. Resting height above the
   * ink stays put; 0 slides every hop flat onto the paper.
   */
  ballLift: number;
  /** Glow intensity multiplier. */
  glow: number;
  showTitle: boolean;
  showProgress: boolean;
  titleFont: string;
  audioOffsetMs: number;
  /** Camera pitch in degrees. Positive values tip the top of the score away. */
  tiltX: number;
  /** Camera yaw in degrees. Positive values turn the right side away. */
  tiltY: number;
  /** Camera roll in degrees. Negative values lift the right side of the staff. */
  tiltZ: number;
  /** CSS perspective distance in pixels. Smaller values give stronger convergence. */
  perspective: number;
  /** Extra zoom applied to the tilted score plane so it still fills the frame. */
  tiltZoom: number;
};

export type RenderData = {
  version: 1;
  meta: ScoreMeta;
  events: NoteEvent[];
  activations: NoteEvent[];
  scroll: ScrollKey[];
  svgUrl: string;
  audioUrl: string;
  settings: VisualSettings;
};

export type JobStatus = 'queued' | 'running' | 'ready' | 'rendering' | 'done' | 'error';

export type JobStage =
  | 'queued'
  | 'reading'
  | 'synthesizing'
  | 'engraving'
  | 'mapping'
  | 'building'
  | 'rendering'
  | 'done';

export type JobPublic = {
  id: string;
  status: JobStatus;
  stage: JobStage;
  progress: number;
  message: string;
  error?: string;
  warnings?: string[];
  unsupported?: string[];
  data?: RenderData;
  videoUrl?: string;
  createdAt: string;
  inputName?: string;
  inputFormat?: string;
};

export type CreateJobResponse = {
  id: string;
};

export type HealthResponse = {
  ok: boolean;
  musescore: { available: boolean; path?: string; version?: string };
  chrome: { available: boolean; note: string };
  ffmpeg: { available: boolean; note: string };
  version: string;
};

export const DEFAULT_SETTINGS: VisualSettings = {
  width: 1920,
  height: 1080,
  fps: 30,
  introSeconds: 0.65,
  outroSeconds: 1.8,
  scoreHeightRatio: 0.5,
  scrollLead: 0.38,
  paperColor: '#c9c2b6',
  paperAlpha: 1,
  scoreColor: '#14110d',
  background: '#111015',
  staffColors: ['#bda0ff', '#ffbc6d', '#8fe3c8', '#ff8fa3'],
  ballScale: 1,
  ballLift: 1,
  glow: 1,
  showTitle: true,
  showProgress: true,
  titleFont: "Georgia, 'Times New Roman', 'Noto Serif SC', 'Songti SC', serif",
  audioOffsetMs: 0,
  tiltX: 12,
  tiltY: 0,
  tiltZ: -5,
  perspective: 1800,
  tiltZoom: 1.12,
};

export const RESOLUTION_PRESETS = [
  {id: 'landscape', label: '横屏 · 16:9', width: 1920, height: 1080},
  {id: 'vertical', label: '竖屏 · 9:16', width: 1080, height: 1920},
  {id: 'square', label: '方形 · 1:1', width: 1080, height: 1080},
] as const;

export const MAX_UPLOAD_BYTES = 30 * 1024 * 1024;
export const MAX_RENDER_SECONDS = 20 * 60;