import { describe, it, expect } from 'vitest'
import { readFileSync } from 'node:fs'
import { join } from 'node:path'
import { parseMissilesTxt, getMissileTxtData, parseOverlayTxt, getOverlayTxtData, parseColorChannel } from '../src/game/skills.ts'
import { numberCell, parseTable } from '../src/game/tables.ts'
import { CANONICAL_LEVEL_LIGHTING, getLevelLighting } from '../src/game/levels-meta.ts'

describe('P0 Data Contract & Table Repair Tests', () => {
  it('1. parseColorChannel correctly preserves authentic 0 values and falls back for empty', () => {
    expect(parseColorChannel('0')).toBe(0)
    expect(parseColorChannel('  0  ')).toBe(0)
    expect(parseColorChannel('255')).toBe(255)
    expect(parseColorChannel('128')).toBe(128)
    expect(parseColorChannel('')).toBe(255)
    expect(parseColorChannel('   ')).toBe(255)
    expect(parseColorChannel(undefined)).toBe(255)
    expect(parseColorChannel(undefined, 100)).toBe(100)
    expect(parseColorChannel('invalid', 100)).toBe(100)
  })

  it('2. numberCell in tables.ts preserves 0 while returning fallback on empty/whitespace cells', () => {
    const row = {
      zeroVal: '0',
      emptyVal: '',
      whitespaceVal: '   ',
      positiveVal: '128',
    }
    expect(numberCell(row, 'zeroVal', 255)).toBe(0)
    expect(numberCell(row, 'emptyVal', 255)).toBe(255)
    expect(numberCell(row, 'whitespaceVal', 255)).toBe(255)
    expect(numberCell(row, 'missingVal', 255)).toBe(255)
    expect(numberCell(row, 'positiveVal', 255)).toBe(128)
  })

  it('3. authentic 1.13c Missiles with 0 color channels retain 0 instead of defaulting to 255', () => {
    const txtPath = join(process.cwd(), 'samples/d2/Patch_D2.mpq') // or txt
    // Test with actual table rows from 1.13c Missiles.txt
    const sampleTsv = [
      'Missile\tId\tVel\tMaxVel\tRange\tLevRange\tCelFile\tAnimLen\tAnimSpeed\tLoopAnim\tNumDirections\tExplosionMissile\tLight\tRed\tGreen\tBlue\tTrans',
      'unholybolt1\t100\t20\t20\t50\t0\tUnholyBolt\t16\t16\t1\t1\t\t5\t0\t0\t0\t2',
      'curseeffectred\t101\t20\t20\t50\t0\tCurse\t16\t16\t1\t1\t\t1\t255\t0\t0\t1',
      'firearrow\t12\t24\t24\t40\t0\tFireArrow\t8\t16\t0\t32\tfireexplode\t6\t255\t178\t64\t1',
      'arrow\t0\t24\t24\t40\t0\tArrow\t1\t16\t0\t32\t\t0\t\t\t\t0',
    ].join('\n')

    const map = parseMissilesTxt(sampleTsv)

    const unholy = map.get('unholybolt1')!
    expect(unholy).toBeDefined()
    expect(unholy.light).toBe(5)
    expect(unholy.red).toBe(0)
    expect(unholy.green).toBe(0)
    expect(unholy.blue).toBe(0)
    expect(unholy.trans).toBe(2)

    const curseRed = map.get('curseeffectred')!
    expect(curseRed).toBeDefined()
    expect(curseRed.light).toBe(1)
    expect(curseRed.red).toBe(255)
    expect(curseRed.green).toBe(0)
    expect(curseRed.blue).toBe(0)
    expect(curseRed.trans).toBe(1)

    const fireArrow = map.get('firearrow')!
    expect(fireArrow.trans).toBe(1)

    const arrow = map.get('arrow')!
    expect(arrow.trans).toBe(0)
    expect(arrow.red).toBe(255) // fallback on empty
  })

  it('4. authentic 1.13c Overlay curse lines retain true 0 color channels', () => {
    const sampleTsv = [
      'overlay\tFilename\tFrames\tAnimRate\tTrans\tPreDraw\tInitRadius\tRadius\tRed\tGreen\tBlue',
      'curseironmaiden\tironmaiden\t14\t16\t3\t0\t1\t6\t255\t0\t0',
      'curseconfuse\tconfuse\t14\t16\t3\t0\t1\t6\t0\t255\t0',
      'cursedecrepify\tdecrepify\t14\t16\t3\t0\t1\t6\t0\t0\t255',
    ].join('\n')

    const map = parseOverlayTxt(sampleTsv)

    const im = map.get('curseironmaiden')!
    expect(im.red).toBe(255)
    expect(im.green).toBe(0)
    expect(im.blue).toBe(0)

    const confuse = map.get('curseconfuse')!
    expect(confuse.red).toBe(0)
    expect(confuse.green).toBe(255)
    expect(confuse.blue).toBe(0)

    const decrepify = map.get('cursedecrepify')!
    expect(decrepify.red).toBe(0)
    expect(decrepify.green).toBe(0)
    expect(decrepify.blue).toBe(255)
  })

  it('5. getMissileTxtData returns authentic trans values for physical vs magical missiles', () => {
    const arrow = getMissileTxtData('arrow')
    expect(arrow.trans).toBe(0)

    const multi = getMissileTxtData('multipleshotarrow')
    expect(multi.trans).toBe(0)

    const meteor = getMissileTxtData('meteor')
    expect(meteor.trans).toBe(0)

    const firebolt = getMissileTxtData('firebolt')
    expect(firebolt.trans).toBe(1)

    const chargedbolt = getMissileTxtData('chargedbolt')
    expect(chargedbolt.trans).toBe(1)

    const firearrow = getMissileTxtData('firearrow')
    expect(firearrow.trans).toBe(1)

    const magicarrow = getMissileTxtData('magicarrow')
    expect(magicarrow.trans).toBe(1)

    const icearrow = getMissileTxtData('icearrow')
    expect(icearrow.trans).toBe(1)

    const javelin = getMissileTxtData('lightningjavelin')
    expect(javelin.trans).toBe(1)
  })

  it('6. CANONICAL_LEVEL_LIGHTING covers all 136 1.13c levels with authentic metadata', () => {
    expect(Object.keys(CANONICAL_LEVEL_LIGHTING).length).toBe(136)

    // Rogue Encampment (Act 1 Town, outdoor)
    const town1 = getLevelLighting(1)!
    expect(town1).toBeDefined()
    expect(town1.isInside).toBe(false)
    expect(town1.act).toBe(1)

    // Catacombs 4 (Andariel, inside)
    const cata4 = getLevelLighting(39)! // Catacombs Level 4 is id 37 or 39
    // Level 37: Catacombs 4
    const level37 = getLevelLighting(37)!
    expect(level37.isInside).toBe(true)
    expect(level37.intensity).toBe(0) // 0 intensity = pitch dark, authentic 1.13c ground truth

    // Lut Gholein Sewer 1 (Intensity = 8)
    const sewer1 = getLevelLighting(47)!
    expect(sewer1.isInside).toBe(true)
    expect(sewer1.intensity).toBe(8)

    // Harem (Intensity = 128)
    const harem = getLevelLighting(50)!
    expect(harem.isInside).toBe(true)
    expect(harem.intensity).toBe(128)

    // Arcane Sanctuary (NoPer = true)
    const arcane = getLevelLighting(74)!
    expect(arcane.noPer).toBe(true)

    // Duriel's Lair (NoPer = true, inside = true)
    const duriel = getLevelLighting(73)!
    expect(duriel.noPer).toBe(true)
    expect(duriel.isInside).toBe(true)
  })
})