import type { SceneGraph } from '@pascal-app/core/clone-scene-graph'
import type { AnyNode, AnyNodeId } from '@pascal-app/core/schema'

/**
 * 40 m² studio apartment — a single open room with one window, one front door
 * and a single "Living/Kitchen" zone. Used as a starting point for small unit
 * briefs. Deterministic ids (`site_empty`, `building_empty`, `level_0`, etc.)
 * are regenerated by the MCP tool via `cloneSceneGraph` before applying.
 */

// Footprint: 8 m × 5 m = 40 m² (centered at origin).
// Walls traverse the boundary counter-clockwise (right-handed XZ plane).
const W = 4 // half-width
const D = 2.5 // half-depth

type StudioNodes = {
  site: AnyNode
  building: AnyNode
  level: AnyNode
  walls: AnyNode[]
  zone: AnyNode
  door: AnyNode
  window: AnyNode
}

function buildNodes(): StudioNodes {
  const site: AnyNode = {
    object: 'node',
    id: 'site_empty' as AnyNodeId,
    type: 'site',
    parentId: null,
    visible: true,
    metadata: {},
    polygon: {
      type: 'polygon',
      points: [
        [-15, -15],
        [15, -15],
        [15, 15],
        [-15, 15],
      ],
    },
    children: ['building_empty' as AnyNodeId],
  } as unknown as AnyNode

  const building: AnyNode = {
    object: 'node',
    id: 'building_empty' as AnyNodeId,
    type: 'building',
    parentId: 'site_empty' as AnyNodeId,
    visible: true,
    metadata: {},
    position: [0, 0, 0],
    rotation: [0, 0, 0],
    children: ['level_0' as AnyNodeId],
  } as unknown as AnyNode

  // Walls with deterministic ids; child ids are listed below after doors/windows
  // are created, so we fill this array after computing them.
  const wallIds = ['wall_n', 'wall_e', 'wall_s', 'wall_w'] as const

  // South wall carries the front door; west wall carries the window.
  const door: AnyNode = {
    object: 'node',
    id: 'door_front' as AnyNodeId,
    type: 'door',
    parentId: 'wall_s' as AnyNodeId,
    visible: true,
    metadata: {},
    wallId: 'wall_s',
    position: [0, 1.05, 0],
    rotation: [0, 0, 0],
    width: 0.9,
    height: 2.1,
    frameThickness: 0.05,
    frameDepth: 0.07,
    threshold: true,
    thresholdHeight: 0.02,
    hingesSide: 'left',
    swingDirection: 'inward',
    segments: [
      {
        type: 'panel',
        heightRatio: 0.4,
        columnRatios: [1],
        dividerThickness: 0.03,
        panelDepth: 0.01,
        panelInset: 0.04,
      },
      {
        type: 'panel',
        heightRatio: 0.6,
        columnRatios: [1],
        dividerThickness: 0.03,
        panelDepth: 0.01,
        panelInset: 0.04,
      },
    ],
    handle: true,
    handleHeight: 1.05,
    handleSide: 'right',
    contentPadding: [0.04, 0.04],
    doorCloser: false,
    panicBar: false,
    panicBarHeight: 1.0,
  } as unknown as AnyNode

  const windowNode: AnyNode = {
    object: 'node',
    id: 'window_w' as AnyNodeId,
    type: 'window',
    parentId: 'wall_w' as AnyNodeId,
    visible: true,
    metadata: {},
    wallId: 'wall_w',
    position: [0, 1.2, 0],
    rotation: [0, 0, 0],
    width: 1.5,
    height: 1.2,
    frameThickness: 0.05,
    frameDepth: 0.07,
    columnRatios: [1],
    rowRatios: [1],
    columnDividerThickness: 0.03,
    rowDividerThickness: 0.03,
    sill: true,
    sillDepth: 0.08,
    sillThickness: 0.03,
  } as unknown as AnyNode

  const wallNorth: AnyNode = {
    object: 'node',
    id: 'wall_n' as AnyNodeId,
    type: 'wall',
    parentId: 'level_0' as AnyNodeId,
    visible: true,
    metadata: {},
    children: [],
    thickness: 0.1,
    height: 2.5,
    start: [-W, -D],
    end: [W, -D],
    frontSide: 'unknown',
    backSide: 'unknown',
  } as unknown as AnyNode

  const wallEast: AnyNode = {
    object: 'node',
    id: 'wall_e' as AnyNodeId,
    type: 'wall',
    parentId: 'level_0' as AnyNodeId,
    visible: true,
    metadata: {},
    children: [],
    thickness: 0.1,
    height: 2.5,
    start: [W, -D],
    end: [W, D],
    frontSide: 'unknown',
    backSide: 'unknown',
  } as unknown as AnyNode

  const wallSouth: AnyNode = {
    object: 'node',
    id: 'wall_s' as AnyNodeId,
    type: 'wall',
    parentId: 'level_0' as AnyNodeId,
    visible: true,
    metadata: {},
    children: ['door_front'],
    thickness: 0.1,
    height: 2.5,
    start: [W, D],
    end: [-W, D],
    frontSide: 'unknown',
    backSide: 'unknown',
  } as unknown as AnyNode

  const wallWest: AnyNode = {
    object: 'node',
    id: 'wall_w' as AnyNodeId,
    type: 'wall',
    parentId: 'level_0' as AnyNodeId,
    visible: true,
    metadata: {},
    children: ['window_w'],
    thickness: 0.1,
    height: 2.5,
    start: [-W, D],
    end: [-W, -D],
    frontSide: 'unknown',
    backSide: 'unknown',
  } as unknown as AnyNode

  const zone: AnyNode = {
    object: 'node',
    id: 'zone_living' as AnyNodeId,
    type: 'zone',
    parentId: 'level_0' as AnyNodeId,
    visible: true,
    metadata: {},
    name: 'Living / Kitchen',
    color: '#60a5fa',
    polygon: [
      [-W, -D],
      [W, -D],
      [W, D],
      [-W, D],
    ],
  } as unknown as AnyNode

  const level: AnyNode = {
    object: 'node',
    id: 'level_0' as AnyNodeId,
    type: 'level',
    parentId: 'building_empty' as AnyNodeId,
    visible: true,
    metadata: {},
    level: 0,
    children: [...wallIds, 'zone_living'] as AnyNodeId[],
  } as unknown as AnyNode

  return {
    site,
    building,
    level,
    walls: [wallNorth, wallEast, wallSouth, wallWest],
    zone,
    door,
    window: windowNode,
  }
}

function buildTemplate(): SceneGraph {
  const n = buildNodes()
  const nodes: Record<AnyNodeId, AnyNode> = {}
  for (const node of [n.site, n.building, n.level, ...n.walls, n.zone, n.door, n.window]) {
    nodes[node.id as AnyNodeId] = node
  }

  // SiteNode.children is a discriminatedUnion of BuildingNode/ItemNode objects
  // (not string ids) — so the site must embed the full building node. The
  // rest of the tree uses string ids per the BaseNode/LevelNode/WallNode
  // schemas. We mutate the flat-dict copy of the site here so the nested
  // representation round-trips through AnyNode.safeParse.
  const siteInDict = nodes['site_empty' as AnyNodeId] as unknown as {
    children: unknown[]
  }
  siteInDict.children = [nodes['building_empty' as AnyNodeId]]

  return {
    nodes,
    rootNodeIds: ['site_empty'] as AnyNodeId[],
  }
}

export const template: SceneGraph = buildTemplate()

export const metadata = {
  id: 'empty-studio',
  name: 'Empty studio',
  description:
    '40 m² single-room studio apartment: 4 walls, 1 living/kitchen zone, 1 window, 1 front door.',
} as const