/**
 * Тесты для IPC validation layer.
 *
 * Этот слой — security-boundary между renderer и main. Если он сломается,
 * compromised renderer сможет писать в стор NaN, отрицательные, Infinity,
 * сверхдлинные строки или undefined-enum'ы. Поэтому покрытие важно для:
 *
 *   1. Тип-проверок (строка/число/булево/массив)
 *   2. Range-checks (reps ∈ [1,9999], minutes ∈ [1,1440] и т.д.)
 *   3. Enum allowlist (theme/lang/notify-mode/stat)
 *   4. Edge cases: NaN, Infinity, MAX_SAFE_INTEGER, 0, отрицательные, длина строк
 *   5. Partial-patch semantics (отсутствие поля ≠ невалидное значение)
 *   6. Сложный nested case: quietHours с HH:MM regex и dedup days
 */
import { describe, expect, it } from 'vitest'
import {
  validateExerciseInput,
  validateExercisePatch,
  validateChallengeInput,
  validateChallengePatch,
  validateSettingsPatch,
  validateId,
  validateActualReps,
  validateSnoozeMinutes
} from './validate'

const validExercise = {
  name: 'Push-ups',
  reps: 10,
  intervalMinutes: 30,
  icon: 'Dumbbell',
  enabled: true
}

describe('validateExerciseInput', () => {
  it('accepts a fully-formed valid input', () => {
    expect(validateExerciseInput(validExercise)).toEqual(validExercise)
  })

  it('rejects non-objects', () => {
    expect(validateExerciseInput(null)).toBeNull()
    expect(validateExerciseInput(undefined)).toBeNull()
    expect(validateExerciseInput('string')).toBeNull()
    expect(validateExerciseInput(42)).toBeNull()
    expect(validateExerciseInput([])).toBeNull() // arrays not allowed
  })

  it('rejects missing required fields', () => {
    expect(validateExerciseInput({ ...validExercise, name: undefined })).toBeNull()
    expect(validateExerciseInput({ ...validExercise, reps: undefined })).toBeNull()
    expect(
      validateExerciseInput({ ...validExercise, intervalMinutes: undefined })
    ).toBeNull()
  })

  it('rejects out-of-range reps', () => {
    expect(validateExerciseInput({ ...validExercise, reps: 0 })).toBeNull()
    expect(validateExerciseInput({ ...validExercise, reps: -1 })).toBeNull()
    expect(validateExerciseInput({ ...validExercise, reps: 10_000 })).toBeNull()
    expect(validateExerciseInput({ ...validExercise, reps: NaN })).toBeNull()
    expect(
      validateExerciseInput({ ...validExercise, reps: Infinity })
    ).toBeNull()
  })

  it('truncates reps with Math.trunc (5.7 → 5)', () => {
    const r = validateExerciseInput({ ...validExercise, reps: 5.7 })
    expect(r?.reps).toBe(5)
  })

  it('rejects out-of-range intervalMinutes (> 24h)', () => {
    expect(
      validateExerciseInput({ ...validExercise, intervalMinutes: 0 })
    ).toBeNull()
    expect(
      validateExerciseInput({ ...validExercise, intervalMinutes: 1441 })
    ).toBeNull()
    expect(
      validateExerciseInput({ ...validExercise, intervalMinutes: -1 })
    ).toBeNull()
  })

  it('rejects empty name', () => {
    expect(validateExerciseInput({ ...validExercise, name: '' })).toBeNull()
  })

  it('rejects name longer than MAX_STR_LEN (200)', () => {
    expect(
      validateExerciseInput({ ...validExercise, name: 'x'.repeat(201) })
    ).toBeNull()
  })

  it('accepts name exactly at MAX_STR_LEN', () => {
    const r = validateExerciseInput({ ...validExercise, name: 'x'.repeat(200) })
    expect(r?.name).toHaveLength(200)
  })

  it('defaults icon to Activity if missing', () => {
    const { icon: _ignored, ...rest } = validExercise
    void _ignored
    expect(validateExerciseInput(rest)?.icon).toBe('Activity')
  })

  it('defaults enabled to true if missing', () => {
    const { enabled: _ignored, ...rest } = validExercise
    void _ignored
    expect(validateExerciseInput(rest)?.enabled).toBe(true)
  })

  // Дизайн validateExerciseInput: required-поля (name/reps/intervalMinutes)
  // строгие — невалидное значение reject'ит весь input. Optional-поля
  // (icon/enabled) lenient — невалидное молча подменяется дефолтом. Это
  // фиксирует контракт: malicious renderer не сможет создать запись с
  // reps=-1, но если он пришлёт `enabled: 'yes'`, получит просто enabled=true.
  it('coerces invalid enabled to true (lenient default for optional fields)', () => {
    expect(
      validateExerciseInput({ ...validExercise, enabled: 'yes' })?.enabled
    ).toBe(true)
    expect(
      validateExerciseInput({ ...validExercise, enabled: 1 })?.enabled
    ).toBe(true)
  })

  // А вот в patch optional-поля строгие — нет defaults, есть `if (v ===
  // undefined) return null`. Это правильнее: если renderer пришёл с патчем,
  // в котором есть поле, оно должно быть валидным.
  it('strict patch: rejects invalid enabled in patch (unlike input)', () => {
    expect(validateExercisePatch({ enabled: 'yes' })).toBeNull()
    expect(validateExercisePatch({ enabled: 1 })).toBeNull()
  })

  it('rejects non-string name', () => {
    expect(validateExerciseInput({ ...validExercise, name: 42 })).toBeNull()
    expect(validateExerciseInput({ ...validExercise, name: null })).toBeNull()
  })
})

describe('validateExercisePatch', () => {
  it('accepts an empty patch (no-op update)', () => {
    expect(validateExercisePatch({})).toEqual({})
  })

  it('accepts partial patches', () => {
    expect(validateExercisePatch({ reps: 12 })).toEqual({ reps: 12 })
    expect(validateExercisePatch({ name: 'New' })).toEqual({ name: 'New' })
    expect(validateExercisePatch({ enabled: false })).toEqual({ enabled: false })
  })

  it('rejects patch with a single invalid field', () => {
    // Patch is all-or-nothing: one bad field rejects the whole patch.
    expect(validateExercisePatch({ name: 'OK', reps: -1 })).toBeNull()
    expect(validateExercisePatch({ name: '', reps: 10 })).toBeNull()
  })

  it('rejects non-object', () => {
    expect(validateExercisePatch(null)).toBeNull()
    expect(validateExercisePatch([])).toBeNull()
  })

  it('accepts nextFireAt and lastDoneAt with valid ranges', () => {
    expect(validateExercisePatch({ nextFireAt: 0 })).toEqual({ nextFireAt: 0 })
    expect(validateExercisePatch({ lastDoneAt: 1_000_000_000_000 })).toEqual({
      lastDoneAt: 1_000_000_000_000
    })
  })

  it('rejects negative timestamps', () => {
    expect(validateExercisePatch({ nextFireAt: -1 })).toBeNull()
    expect(validateExercisePatch({ lastDoneAt: -1 })).toBeNull()
  })

  it('rejects NaN/Infinity timestamps', () => {
    expect(validateExercisePatch({ nextFireAt: NaN })).toBeNull()
    expect(validateExercisePatch({ nextFireAt: Infinity })).toBeNull()
  })
})

describe('validateChallengeInput', () => {
  const valid = {
    name: 'Deaths → squats',
    gameId: 'dota2',
    stat: 'deaths' as const,
    multiplier: 3,
    exerciseName: 'Приседания',
    icon: 'Activity',
    enabled: true
  }

  it('accepts valid input', () => {
    expect(validateChallengeInput(valid)).toEqual(valid)
  })

  it('rejects unknown stat', () => {
    expect(validateChallengeInput({ ...valid, stat: 'pizza' })).toBeNull()
  })

  it('accepts all valid stats', () => {
    const stats = ['deaths', 'kills', 'assists', 'last_hits', 'denies', 'duration_min']
    for (const stat of stats) {
      expect(validateChallengeInput({ ...valid, stat })).not.toBeNull()
    }
  })

  it('rejects negative multiplier', () => {
    expect(validateChallengeInput({ ...valid, multiplier: -1 })).toBeNull()
  })

  it('rejects multiplier > 1000', () => {
    expect(validateChallengeInput({ ...valid, multiplier: 1001 })).toBeNull()
  })

  it('accepts zero multiplier (legitimate "disable" semantics)', () => {
    expect(validateChallengeInput({ ...valid, multiplier: 0 })?.multiplier).toBe(0)
  })

  it('accepts fractional multiplier (e.g. 0.5×)', () => {
    expect(validateChallengeInput({ ...valid, multiplier: 0.5 })?.multiplier).toBe(0.5)
  })
})

describe('validateChallengePatch', () => {
  it('accepts empty patch', () => {
    expect(validateChallengePatch({})).toEqual({})
  })

  it('rejects unknown stat in patch', () => {
    expect(validateChallengePatch({ stat: 'mana' })).toBeNull()
  })
})

describe('validateSettingsPatch', () => {
  it('accepts empty patch', () => {
    expect(validateSettingsPatch({})).toEqual({})
  })

  it('accepts each boolean toggle independently', () => {
    expect(validateSettingsPatch({ globalEnabled: false })).toEqual({
      globalEnabled: false
    })
    expect(validateSettingsPatch({ soundEnabled: true })).toEqual({
      soundEnabled: true
    })
  })

  it('rejects unknown theme', () => {
    expect(validateSettingsPatch({ theme: 'sepia' })).toBeNull()
  })

  it('accepts all valid themes', () => {
    expect(validateSettingsPatch({ theme: 'light' })?.theme).toBe('light')
    expect(validateSettingsPatch({ theme: 'dark' })?.theme).toBe('dark')
    expect(validateSettingsPatch({ theme: 'system' })?.theme).toBe('system')
  })

  it('rejects unknown language', () => {
    expect(validateSettingsPatch({ language: 'fr' })).toBeNull()
  })

  it('rejects unknown notification mode', () => {
    expect(validateSettingsPatch({ notificationMode: 'sms' })).toBeNull()
  })

  it('rejects out-of-range snoozeMinutes', () => {
    expect(validateSettingsPatch({ snoozeMinutes: 0 })).toBeNull()
    expect(validateSettingsPatch({ snoozeMinutes: 1441 })).toBeNull()
    expect(validateSettingsPatch({ snoozeMinutes: -5 })).toBeNull()
  })

  describe('quietHours subobject', () => {
    const baseQh = {
      enabled: true,
      from: '22:00',
      to: '08:00',
      days: [0, 1, 2, 3, 4, 5, 6]
    }

    it('accepts a valid quietHours', () => {
      expect(validateSettingsPatch({ quietHours: baseQh })?.quietHours).toEqual(
        baseQh
      )
    })

    it('rejects non-object quietHours', () => {
      expect(validateSettingsPatch({ quietHours: 'always' })).toBeNull()
      expect(validateSettingsPatch({ quietHours: null })).toBeNull()
    })

    it('rejects malformed HH:MM', () => {
      expect(
        validateSettingsPatch({ quietHours: { ...baseQh, from: '2500' } })
      ).toBeNull()
      expect(
        validateSettingsPatch({ quietHours: { ...baseQh, to: 'bedtime' } })
      ).toBeNull()
      expect(
        validateSettingsPatch({ quietHours: { ...baseQh, from: '8' } })
      ).toBeNull()
    })

    it('accepts HH:MM with 1-digit hour (9:30)', () => {
      // Regex is /^\d{1,2}:\d{2}$/ — допускаем «9:30», парсер сам разберётся.
      const r = validateSettingsPatch({
        quietHours: { ...baseQh, from: '9:30' }
      })
      expect(r?.quietHours?.from).toBe('9:30')
    })

    it('dedupes days array', () => {
      const r = validateSettingsPatch({
        quietHours: { ...baseQh, days: [1, 2, 2, 3, 1] }
      })
      expect(r?.quietHours?.days).toEqual([1, 2, 3])
    })

    it('rejects out-of-range day (7)', () => {
      expect(
        validateSettingsPatch({ quietHours: { ...baseQh, days: [0, 7] } })
      ).toBeNull()
    })

    it('rejects negative day', () => {
      expect(
        validateSettingsPatch({ quietHours: { ...baseQh, days: [-1] } })
      ).toBeNull()
    })

    it('rejects non-array days', () => {
      expect(
        validateSettingsPatch({ quietHours: { ...baseQh, days: 'all' } })
      ).toBeNull()
    })

    it('accepts empty days array (window effectively disabled)', () => {
      const r = validateSettingsPatch({
        quietHours: { ...baseQh, days: [] }
      })
      expect(r?.quietHours?.days).toEqual([])
    })
  })
})

describe('validateId', () => {
  it('accepts reasonable id strings', () => {
    expect(validateId('abc')).toBe('abc')
    expect(validateId('uuid-v4-style-thing-123')).toBe('uuid-v4-style-thing-123')
  })

  it('rejects non-strings', () => {
    expect(validateId(42)).toBeNull()
    expect(validateId(null)).toBeNull()
    expect(validateId(undefined)).toBeNull()
    expect(validateId({})).toBeNull()
  })

  it('rejects empty string', () => {
    expect(validateId('')).toBeNull()
  })

  it('rejects strings longer than 64 chars', () => {
    expect(validateId('x'.repeat(65))).toBeNull()
  })
})

describe('validateActualReps', () => {
  it('returns undefined for undefined/null (means: use planned reps)', () => {
    expect(validateActualReps(undefined)).toBeUndefined()
    expect(validateActualReps(null)).toBeUndefined()
  })

  it('accepts zero (partial completion = "did 0 of 10")', () => {
    expect(validateActualReps(0)).toBe(0)
  })

  it('accepts large values up to cap', () => {
    expect(validateActualReps(100_000)).toBe(100_000)
  })

  it('rejects negative', () => {
    expect(validateActualReps(-1)).toBeUndefined()
  })

  it('rejects values above cap', () => {
    expect(validateActualReps(100_001)).toBeUndefined()
  })

  it('rejects NaN/Infinity', () => {
    expect(validateActualReps(NaN)).toBeUndefined()
    expect(validateActualReps(Infinity)).toBeUndefined()
  })
})

describe('validateSnoozeMinutes', () => {
  it('accepts valid minutes', () => {
    expect(validateSnoozeMinutes(15)).toBe(15)
    expect(validateSnoozeMinutes(1)).toBe(1)
    expect(validateSnoozeMinutes(1440)).toBe(1440)
  })

  it('rejects 0 and above 24h', () => {
    expect(validateSnoozeMinutes(0)).toBeNull()
    expect(validateSnoozeMinutes(1441)).toBeNull()
  })

  it('rejects non-numbers', () => {
    expect(validateSnoozeMinutes('15')).toBeNull()
    expect(validateSnoozeMinutes(null)).toBeNull()
  })
})