import { describe, it, expect } from 'vitest'
import {
  toApiPath, rows, mapMeta, mapLink, cardRows, metricValue,
  cardVisible, sortCards, permittedCards, renderableCards,
  visibleRows, overflowCount,
} from './dashboardCards'

const failuresCard = {
  id: 'geenforce-failures',
  render: 'exceptions',
  severity: 'critical',
  position: 10,
  map: {
    title: 'hostname',
    detail: 'entryname',
    meta: [{ key: 'message' }, { key: 'exitcode', label: 'exit' }],
    link: '/pcs/{computerid}',
  },
}

describe('endpoint paths', () => {
  it('strips the api prefix the instance already carries', () => {
    expect(toApiPath('/api/geenforce/dashboard/failures'))
      .toBe('/geenforce/dashboard/failures')
  })

  it('leaves a relative endpoint alone', () => {
    expect(toApiPath('/geenforce/x')).toBe('/geenforce/x')
  })
})

describe('reading rows from whatever shape the endpoint returns', () => {
  it('accepts a bare array, {rows} or {items}', () => {
    expect(rows({ _data: [1, 2] })).toEqual([1, 2])
    expect(rows({ _data: { rows: [1] } })).toEqual([1])
    expect(rows({ _data: { items: [1, 2, 3] } })).toEqual([1, 2, 3])
  })

  it('treats a failed fetch as no rows rather than throwing', () => {
    expect(rows({ _data: null })).toEqual([])
  })
})

describe('mapping a row', () => {
  it('builds title, detail, meta and link from the declaration', () => {
    const card = { ...failuresCard, _data: [{
      hostname: 'WJSF1234', entryname: 'Install OpenText',
      exitcode: 1603, message: 'Fatal error', computerid: 42,
    }] }
    const [row] = cardRows(card)
    expect(row.title).toBe('WJSF1234')
    expect(row.detail).toBe('Install OpenText')
    expect(row.meta.map((m) => m.text)).toEqual(['Fatal error', 'exit 1603'])
    expect(row.link).toBe('/pcs/42')
  })

  it('supports a trailing unit so the text reads as a sentence', () => {
    const card = {
      render: 'exceptions',
      map: { title: 'hostname', meta: [{ key: 'quietdays', label: 'quiet for', suffix: ' days' }] },
      _data: [{ hostname: 'QUIETPC', quietdays: 3 }],
    }
    expect(cardRows(card)[0].meta[0].text).toBe('quiet for 3 days')
  })

  it('drops empty meta values instead of rendering a stray label', () => {
    const card = { ...failuresCard, _data: [{ hostname: 'X', message: '', exitcode: null }] }
    expect(cardRows(card)[0].meta).toEqual([])
  })

  it('omits the link when the substitution value is missing, keeping the row', () => {
    // A PC shopdb does not know still reports its failure - that is the bay
    // most likely to be misconfigured. It must not link to /pcs/undefined.
    const card = { ...failuresCard, _data: [{ hostname: 'GHOSTPC', computerid: null }] }
    const [row] = cardRows(card)
    expect(row.title).toBe('GHOSTPC')
    expect(row.link).toBeNull()
  })
})

describe('long lists', () => {
  const many = (n) => ({
    render: 'exceptions',
    map: { title: 'hostname' },
    _data: Array.from({ length: n }, (_v, i) => ({ hostname: `PC${i}` })),
  })

  it('shows at most five rows so one card cannot bury the rest', () => {
    expect(visibleRows(many(40))).toHaveLength(5)
    expect(overflowCount(many(40))).toBe(35)
  })

  it('does not claim an overflow when everything fits', () => {
    expect(visibleRows(many(3))).toHaveLength(3)
    expect(overflowCount(many(3))).toBe(0)
  })
})

describe('empty handling', () => {
  it('hides a card with nothing to report by default', () => {
    // The whole point: a card saying "nothing wrong" daily trains people to
    // stop reading the page.
    expect(cardVisible({ render: 'exceptions', _data: [] })).toBe(false)
  })

  it('keeps a card whose absence is itself news when it opts in', () => {
    expect(cardVisible({ render: 'exceptions', _data: [], empty: 'line' })).toBe(true)
  })

  it('shows a card that has findings', () => {
    expect(cardVisible({ render: 'exceptions', _data: [{ a: 1 }] })).toBe(true)
  })

  it('hides a card whose fetch failed rather than drawing it empty', () => {
    expect(cardVisible({ render: 'exceptions', _data: null })).toBe(false)
  })

  it('hides a zero metric but shows a non-zero one', () => {
    expect(cardVisible({ render: 'metric', _data: { value: 0 } })).toBe(false)
    expect(cardVisible({ render: 'metric', _data: { value: 3 } })).toBe(true)
    expect(metricValue({ render: 'metric', _data: { value: 3 } })).toBe(3)
  })
})

describe('ordering', () => {
  it('puts severity before position, so info never sits above a failure', () => {
    const ordered = sortCards([
      { id: 'info-recent', severity: 'info', position: 1 },
      { id: 'crit-failures', severity: 'critical', position: 90 },
      { id: 'warn-toner', severity: 'warning', position: 50 },
    ])
    expect(ordered.map((c) => c.id))
      .toEqual(['crit-failures', 'warn-toner', 'info-recent'])
  })

  it('falls back to position within one severity', () => {
    const ordered = sortCards([
      { id: 'b', severity: 'critical', position: 20 },
      { id: 'a', severity: 'critical', position: 10 },
    ])
    expect(ordered.map((c) => c.id)).toEqual(['a', 'b'])
  })
})

describe('gating', () => {
  it('drops a card the user lacks permission for', () => {
    // The dashboard must not become a way around RBAC.
    const has = (name) => name === 'printers.view'
    const kept = permittedCards([
      { id: 'toner', permission: 'printers.view' },
      { id: 'enforce', permission: 'geenforce.manage' },
      { id: 'open', permission: null },
    ], has)
    expect(kept.map((c) => c.id)).toEqual(['toner', 'open'])
  })

  it('skips a render mode this core does not have', () => {
    // A plugin built against a newer core degrades instead of leaving a hole.
    const kept = renderableCards([
      { id: 'ok', render: 'exceptions' },
      { id: 'future', render: 'sparkline' },
    ])
    expect(kept.map((c) => c.id)).toEqual(['ok'])
  })
})

describe('chips and tooltips', () => {
  const printerCard = {
    render: 'exceptions',
    map: {
      title: 'printername',
      titletooltip: 'location',
      chips: 'supplies',
      link: '/printers/{printerid}',
    },
    _data: [{
      printerid: 7,
      printername: 'WJ-HP-402',
      location: 'Cell B, north wall',
      supplies: [
        { text: 'Black 4%', title: 'CF226X (high)', level: 'critical' },
        { text: 'Cyan 9%', title: 'No part number on file for this model', level: 'low' },
      ],
    }],
  }

  it('builds one chip per depleted supply, each with its reorder tooltip', () => {
    const [row] = cardRows(printerCard)
    expect(row.chips.map((c) => c.text)).toEqual(['Black 4%', 'Cyan 9%'])
    expect(row.chips[0].title).toBe('CF226X (high)')
    expect(row.chips[0].level).toBe('critical')
  })

  it('puts the location on the title as a tooltip, not in the line', () => {
    const [row] = cardRows(printerCard)
    expect(row.titletip).toBe('Cell B, north wall')
    expect(row.detail).toBe('')
  })

  it('has no chips when a card declares none', () => {
    expect(cardRows({ render: 'exceptions', map: { title: 'x' }, _data: [{ x: 'y' }] })[0].chips)
      .toEqual([])
  })
})