// Plantings ("plops") data layer: the zod shape for a /full planting plus the
// EditorPlanting the canvas renders. Optimistic create/update/remove mutations
// live in objects.ts alongside the FullGarden cache they patch (a plop is part
// of the one-shot editor payload).

import { z } from 'zod'

export const serverPlantingSchema = z.object({
  id: z.number(),
  objectId: z.number(),
  plantId: z.number(),
  xCm: z.number(),
  yCm: z.number(),
  radiusCm: z.number(),
  count: z.number().nullable().optional(), // null/absent = derived
  label: z.string().nullable().optional(),
  plantedAt: z.string().nullable().optional(),
  removedAt: z.string().nullable().optional(),
  derivedCount: z.number(), // computed server-side from area / spacing²
  version: z.number(),
  createdAt: z.string(),
  updatedAt: z.string(),
})
export type ServerPlanting = z.infer<typeof serverPlantingSchema>

/** The plop shape the canvas renders. x/y/radius are in the parent object's
 *  local frame (origin at object center), so a plop tracks its object. */
export interface EditorPlanting {
  id: number
  objectId: number
  plantId: number
  xCm: number
  yCm: number
  radiusCm: number
  count: number | null
  derivedCount: number
  label: string | null
  plantedAt: string | null
  version: number
}

export function toEditorPlanting(p: ServerPlanting): EditorPlanting {
  return {
    id: p.id,
    objectId: p.objectId,
    plantId: p.plantId,
    xCm: p.xCm,
    yCm: p.yCm,
    radiusCm: p.radiusCm,
    count: p.count ?? null,
    derivedCount: p.derivedCount,
    label: p.label ?? null,
    plantedAt: p.plantedAt ?? null,
    version: p.version,
  }
}

/** The count a plop shows: its explicit override, else the derived value. */
export function effectiveCount(p: { count: number | null; derivedCount: number }): number {
  return p.count ?? p.derivedCount
}

/** Client-side mirror of the server's derived-count formula, for live display
 *  while resizing a plop (before the PATCH round-trips). max(1, round(π·r² /
 *  spacing²)), capped like the server. */
export function computeDerivedCount(radiusCm: number, spacingCm: number): number {
  if (radiusCm <= 0 || spacingCm <= 0) return 1
  const n = Math.round((Math.PI * radiusCm * radiusCm) / (spacingCm * spacingCm))
  return Math.max(1, Math.min(1_000_000, n))
}