import { describe, expect, it } from 'vitest'
import type { CaseState, Evidence, WidgetRelation } from './types'
import {
  MAX_BOARD_ZOOM,
  MIN_BOARD_ZOOM,
  clampBoardZoom,
  containedIds,
  folderIsOpen,
  moveBoardPoint,
  nextOpenBoardPosition,
  normalizeCase,
  panViewport,
  relationPosition,
  timelinePositionPercent,
  timelineRange,
  zoomFromWheel,
} from './boardDomain'

const folder: Evidence = {
  id: 'folder-1',
  type: 'folder',
  title: 'Folder',
  content: '',
  x: 200,
  y: 300,
  width: 260,
  config: { open: false },
}

const state: CaseState = {
  brief: { body: '', concepts: [] },
  id: 'test-level',
  title: 'Test',
  subtitle: '',
  documents: [],
  evidence: [folder],
  relations: [],
  connections: [],
  viewport: { x: 10, y: 20, zoom: 0.5 },
}

describe('board coordinate math', () => {
  it('moves board objects by screen distance divided by zoom', () => {
    expect(moveBoardPoint({ x: 100, y: 80 }, { x: 50, y: -25 }, 0.5)).toEqual({ x: 200, y: 30 })
    expect(moveBoardPoint({ x: 100, y: 80 }, { x: 50, y: -25 }, 1.25)).toEqual({ x: 140, y: 60 })
  })

  it('rejects invalid zoom during coordinate conversion', () => {
    expect(() => moveBoardPoint({ x: 0, y: 0 }, { x: 10, y: 10 }, 0)).toThrow(RangeError)
  })

  it('pans in screen coordinates without scaling the delta', () => {
    expect(panViewport(state.viewport, { x: 25, y: -10 })).toEqual({ x: 35, y: 10, zoom: 0.5 })
  })

  it('clamps toolbar and pinch zoom to the same limits', () => {
    expect(clampBoardZoom(-10)).toBe(MIN_BOARD_ZOOM)
    expect(clampBoardZoom(10)).toBe(MAX_BOARD_ZOOM)
    expect(zoomFromWheel(1, 10_000)).toBe(MIN_BOARD_ZOOM)
    expect(zoomFromWheel(1, -10_000)).toBe(MAX_BOARD_ZOOM)
  })

  it('places new exhibits in deterministic open slots', () => {
    const preferred = { x: 500, y: 400 }
    expect(nextOpenBoardPosition([], preferred, { width: 280 })).toEqual(preferred)
    expect(nextOpenBoardPosition([{ x: 500, y: 400, width: 280 }], preferred, { width: 280 })).toEqual({ x: 826, y: 400 })
    expect(nextOpenBoardPosition([
      { x: 500, y: 400, width: 280 },
      { x: 826, y: 400, width: 280 },
    ], preferred, { width: 280 })).toEqual({ x: 174, y: 400 })
  })
})

describe('timeline projection', () => {
  it('creates at least a four-year range around a single year', () => {
    const range = timelineRange(['2021-03-12'])
    expect(range.endYear - range.startYear).toBe(4)
    expect(range.startYear).toBeLessThanOrEqual(2021)
    expect(range.endYear).toBeGreaterThanOrEqual(2021)
  })

  it('uses all supplied years when the evidence spans a wider range', () => {
    expect(timelineRange(['2012-01-01', '2024-06-01'])).toMatchObject({ startYear: 2012, endYear: 2024 })
  })

  it('projects dates proportionally and clamps dates outside the range', () => {
    const range = timelineRange(['2020-01-01', '2024-12-31'])
    expect(timelinePositionPercent('2010-01-01', range)).toBe(0)
    expect(timelinePositionPercent('2030-01-01', range)).toBe(100)
    expect(timelinePositionPercent('2022-07-02', range)).toBeGreaterThan(49)
    expect(timelinePositionPercent('2022-07-02', range)).toBeLessThan(51)
  })

  it('uses a valid configured date range without automatic year padding', () => {
    const range = timelineRange(['1987-01-08', '1987-10-24'], 2026, { start: '1987-10-01', end: '1987-10-31' })
    expect(new Date(range.start).toISOString()).toBe('1987-10-01T00:00:00.000Z')
    expect(new Date(range.end).toISOString()).toBe('1987-10-31T23:59:59.999Z')
    expect(timelinePositionPercent('1987-10-16', range)).toBeGreaterThan(48)
    expect(timelinePositionPercent('1987-10-16', range)).toBeLessThan(52)
  })
})

describe('folder domain behavior', () => {
  const relations: WidgetRelation[] = [
    { id: 'later', fromWidgetId: folder.id, toWidgetId: 'doc-2', type: 'contains', sortOrder: 2 },
    { id: 'other', fromWidgetId: 'folder-2', toWidgetId: 'doc-x', type: 'contains', sortOrder: 0 },
    { id: 'first', fromWidgetId: folder.id, toWidgetId: 'doc-1', type: 'contains', sortOrder: 0 },
  ]

  it('orders and scopes contained documents by their normalized relations', () => {
    expect(containedIds({ ...state, relations }, folder.id)).toEqual(['doc-1', 'doc-2'])
  })

  it('only treats an explicit boolean true as open', () => {
    expect(folderIsOpen(folder)).toBe(false)
    expect(folderIsOpen({ ...folder, config: { open: true } })).toBe(true)
    expect(folderIsOpen({ ...folder, config: { open: 'true' } })).toBe(false)
  })

  it('retains a configured expanded file position', () => {
    const relation = { ...relations[0], config: { x: 720, y: 415 } }
    expect(relationPosition({ ...state, relations }, relation)).toEqual({ x: 720, y: 415 })
  })

  it('derives a deterministic position when a relation has not been moved', () => {
    expect(relationPosition({ ...state, relations }, relations[2])).toEqual({ x: 550, y: 270 })
    expect(relationPosition({ ...state, relations }, relations[0])).toEqual({ x: 960, y: 270 })
  })

  it('normalizes legacy containment without changing source ownership', () => {
    const legacy = {
      ...state,
      documents: [{ id: 'doc-1', title: 'Image', kind: 'IMAGE', date: '', body: [], regions: [], mimeType: 'image/png' }],
      evidence: [{ ...folder, type: 'evidence', sourceDocumentId: 'doc-1', containedDocumentIds: ['doc-1'], config: undefined }],
      relations: undefined,
    } as unknown as CaseState
    const normalized = normalizeCase(legacy)
    expect(normalized.evidence[0]).toMatchObject({ type: 'folder', config: {}, containedDocumentIds: ['doc-1'] })
    expect(normalized.documents[0]).toMatchObject({ fileType: 'image', metadata: {} })
    expect(normalized.relations).toHaveLength(1)
  })
})