import { z } from "zod";

/**
 * Map presentation settings (CR-003): sizes in screen pixels, offsets, and
 * colors. These are not game numbers, so they live here, not in
 * `@deadhead/content`. Angles are degrees clockwise from screen right.
 */
const px = z.number().positive();
const color = z.number().int().min(0).max(0xffffff);
const offset = z.object({ distancePx: px, angleDeg: z.number() });

export const mapStyleSchema = z
  .object({
    /** On-screen base size (long side, px) per sprite asset id (decision 0.5.38). */
    spriteSizePx: z.record(z.string(), px),
    /** Every ship sprite's base size (long side, px). */
    shipSizePx: px,
    /**
     * Sprite size factor as the player zooms (decision 0.5.38): zoom ^ exponent,
     * clamped to [min, max], so sprites stay roughly the same size on screen.
     */
    spriteScale: z.object({ min: px, max: px, zoomExponent: z.number().min(0).max(1) }),
    /**
     * Child bodies drawn at a fixed screen distance from their parent (decision
     * 0.5.39). The angle is measured from the outward direction (Sun → parent),
     * so a child never lands on the Sun.
     */
    childOffsets: z.record(z.string(), offset.extend({ parentId: z.string() })),
    /**
     * Idle-ship count badge: `distancePx` beyond the body's edge, at `angleDeg`,
     * or the first of the other diagonals that is clear of bodies and labels.
     */
    idleBadge: offset.extend({ radiusPx: px, fontSizePx: px }),
    /** Location badge art (e.g. Jupiter's cloud platform), on the body's edge. */
    locationBadge: z.object({ sizePx: px, angleDeg: z.number() }),
    /** Opacity of an undiscovered location's (desaturated) sprite. */
    undiscoveredAlpha: z.number().min(0).max(1),
    /** Code-drawn lock (undiscovered) and HQ marker sizes, px. */
    lockSizePx: px,
    hqSizePx: px,
    /** No tap target is smaller than this (px, square). */
    minTapPx: px,
    /** Background moves this fraction of the camera pan (decision 0.5.40). */
    parallax: z.number().min(0).max(1),
    /** Background covers the viewport plus this fraction of it on every side. */
    backgroundMargin: z.number().min(0).max(1),
    /** Background zoom follows map zoom by this fraction (0 = never zooms). */
    backgroundZoomFollow: z.number().min(0).max(1),
    label: z.object({ fontSizePx: px, gapPx: z.number().min(0), haloPx: z.number().min(0) }),
    /** Gap kept between in-flight ships that would otherwise overlap (Step 10C.8). */
    shipSeparationPx: px,
    colors: z.object({
      background: color,
      orbit: color,
      orbitAlpha: z.number().min(0).max(1),
      routeBehind: color,
      routeAhead: color,
      label: color,
      labelUndiscovered: color,
      labelHalo: color,
      hq: color,
      badgeFill: color,
      badgeText: color,
      selection: color,
      lock: color,
      placeholderBody: color,
      placeholderShip: color,
      sun: color,
    }),
  })
  .refine((s) => s.spriteScale.min <= s.spriteScale.max, {
    message: "spriteScale.min must not exceed spriteScale.max",
    path: ["spriteScale"],
  });
export type MapStyle = z.infer<typeof mapStyleSchema>;

export const mapStyle: MapStyle = mapStyleSchema.parse({
  spriteSizePx: {
    sun: 64,
    "body-jupiter": 48,
    "body-earth": 32,
    "body-mars": 32,
    "body-ceres": 22,
    "body-moon": 18,
  },
  shipSizePx: 24,
  spriteScale: { min: 0.75, max: 1.75, zoomExponent: 0.35 },
  // 46 px clears Earth and the Moon at the largest sprite scale: (32 + 18) / 2 × 1.75 = 43.75.
  childOffsets: { moon: { parentId: "earth", distancePx: 46, angleDeg: -30 } },
  idleBadge: { distancePx: 2, angleDeg: -135, radiusPx: 8, fontSizePx: 10 },
  locationBadge: { sizePx: 16, angleDeg: -45 },
  undiscoveredAlpha: 0.55,
  lockSizePx: 12,
  hqSizePx: 9,
  minTapPx: 44,
  parallax: 0.15,
  backgroundMargin: 0.1,
  backgroundZoomFollow: 0.05,
  label: { fontSizePx: 11, gapPx: 4, haloPx: 3 },
  shipSeparationPx: 44,
  colors: {
    background: 0x020617,
    orbit: 0x94a3b8,
    orbitAlpha: 0.18,
    routeBehind: 0x38bdf8,
    routeAhead: 0x7dd3fc,
    label: 0xe2e8f0,
    labelUndiscovered: 0x94a3b8,
    labelHalo: 0x020617,
    hq: 0x34d399,
    badgeFill: 0xfbbf24,
    badgeText: 0x020617,
    selection: 0xfbbf24,
    lock: 0xcbd5e1,
    placeholderBody: 0xe2e8f0,
    placeholderShip: 0xfbbf24,
    sun: 0xfbbf24,
  },
});