import test from 'brittle'
import { readFile } from 'node:fs/promises'
import { createContext, runInContext } from 'node:vm'
import { dirname, join } from 'node:path'
import { fileURLToPath } from 'node:url'

const __dirname = dirname(fileURLToPath(import.meta.url))
const helpersPath = join(__dirname, '../lib/baretop-ui-helpers.js')
const largeNetFixture = join(
  __dirname,
  'fixtures/baretop-large-net-summary.json'
)

test('bareTopParseLoadavg extracts floats and task counts', async (t) => {
  const code = await readFile(helpersPath, 'utf8')
  const ctx = createContext({})
  runInContext(code, ctx)
  const la = ctx.bareTopParseLoadavg('2.5 1.0 0.5 3/100')
  t.ok(la)
  t.is(la.one, 2.5)
  t.is(la.running, 3)
  t.is(la.total, 100)
})

test('bareTopFormatFixedColumns pads and truncates', async (t) => {
  const code = await readFile(helpersPath, 'utf8')
  const ctx = createContext({})
  runInContext(code, ctx)
  const line = ctx.bareTopFormatFixedColumns(
    ['12', 'hello-world-extra', 'x'],
    [4, 6, 2],
    ['r', 'l', 'l'],
    80
  )
  t.ok(line.includes('12'))
  t.ok(line.includes('hello'))
})

test('bareTopSortProcessRows stable by pid', async (t) => {
  const code = await readFile(helpersPath, 'utf8')
  const ctx = createContext({})
  runInContext(code, ctx)
  const rows = [
    { pid: 3, name: 'c', state: 'running' },
    { pid: 1, name: 'a', state: 'sleeping' }
  ]
  const byName = ctx.bareTopSortProcessRows(rows, 'name', true)
  t.is(bareTopProcessPidLocal(byName[0]), 1)
  const byPid = ctx.bareTopSortProcessRows(rows, 'pid', true)
  t.is(bareTopProcessPidLocal(byPid[0]), 1)
})

test('bareTopSortProcessRows orders by startedAtMs when sortKey is time', async (t) => {
  const code = await readFile(helpersPath, 'utf8')
  const ctx = createContext({})
  runInContext(code, ctx)
  const rows = [
    { pid: 2, name: 'b', startedAtMs: 2000 },
    { pid: 1, name: 'a', startedAtMs: 5000 }
  ]
  const asc = ctx.bareTopSortProcessRows(rows, 'time', true)
  t.is(bareTopProcessPidLocal(asc[0]), 2)
  const desc = ctx.bareTopSortProcessRows(rows, 'time', false)
  t.is(bareTopProcessPidLocal(desc[0]), 1)
})

test('bareTopScrollSliceLines shifts first visible line with scrollTop', async (t) => {
  const code = await readFile(helpersPath, 'utf8')
  const ctx = createContext({})
  runInContext(code, ctx)
  const wrapped = ['L0', 'L1', 'L2', 'L3', 'L4']
  t.is(ctx.bareTopScrollSliceLines(wrapped, 0, 2).join('|'), 'L0|L1')
  t.is(ctx.bareTopScrollSliceLines(wrapped, 2, 2).join('|'), 'L2|L3')
  t.is(ctx.bareTopScrollSliceLines(wrapped, 2, 2)[0], 'L2')
})

test('bareTopOverviewLines keeps ASCII section lines within cols', async (t) => {
  const code = await readFile(helpersPath, 'utf8')
  const ctx = createContext({})
  runInContext(code, ctx)
  const cols = 80
  const snap = {
    metricsLive: {
      session: { execLineCount: 1, pipelineBytesTotal: 2, execLineWallMsTotal: 3 },
      peers: 1,
      pipeline: { maxBytes: 1024, maxDepth: 4 },
      delegateInflight: { http: 1 },
      kernelCounters: { a: 5, b: 2 }
    },
    resources: null,
    fairnessSnapshot: null,
    subprocessBridge: null,
    hostStats: null,
    extra: {},
    healthBreakdown: 'base=100 =>100',
    healthScore: 100
  }
  const ov = ctx.bareTopOverviewLines(snap, {
    cols,
    na: 'N/A',
    compact: true,
    deltaMode: false,
    prevMetrics: null,
    nowMs: 1700000000000,
    asciiSep: true,
    flattenCap: () => ['  (stub)'],
    ringProto: [1, 2, 3],
    protomuxSpark: false,
    sparkW: 8,
    sparkAscii: true,
    logSpark: false,
    braille: false,
    healthDetail: false,
    healthBreakdown: '',
    splitLeftCol: 0,
    splitMiniProc: false,
    layoutVersion: 'test'
  })
  for (const line of ov.lines) {
    t.ok(
      line.length <= cols,
      'line longer than cols: ' + line.length + ' > ' + cols
    )
  }
})

test('bareTopNetTabLines sorts interfaces by rx+tx', async (t) => {
  const code = await readFile(helpersPath, 'utf8')
  const ctx = createContext({})
  runInContext(code, ctx)
  const lines = ctx.bareTopNetTabLines(
    {
      interfaces: [
        { name: 'lo', rxBytes: 1, txBytes: 1 },
        { name: 'eth0', rxBytes: 100, txBytes: 50 }
      ]
    },
    100
  )
  t.ok(lines.some((l) => l.includes('interfaces')))
  t.ok(lines.some((l) => l.includes('eth0')))
})

test('bareTopNetTabLines expands nested objects (no [object Object])', async (t) => {
  const code = await readFile(helpersPath, 'utf8')
  const ctx = createContext({})
  runInContext(code, ctx)
  const raw = await readFile(
    join(__dirname, 'fixtures/baretop-net-summary-nested.json'),
    'utf8'
  )
  const net = JSON.parse(raw)
  const lines = ctx.bareTopNetTabLines(net, 100, { maxLines: 200 })
  const blob = lines.join('\n')
  t.ok(!blob.includes('[object Object]'), 'should not stringify objects blindly')
  t.ok(blob.includes('replicationQueue'), 'section for queue')
  t.ok(blob.includes('peerFirewallStats'), 'section for firewall')
  t.ok(blob.includes('bsdSocketGuestBridge'), 'section for bridge')
  t.ok(blob.includes('acceptedSessionCount') || blob.includes('10'), 'firewall scalar')
})

test('bareTopNetTabLines respects maxLines cap', async (t) => {
  const code = await readFile(helpersPath, 'utf8')
  const ctx = createContext({})
  runInContext(code, ctx)
  const big = { a: 1 }
  for (let i = 0; i < 80; i++) big['k' + i] = i
  const lines = ctx.bareTopNetTabLines(big, 80, { maxLines: 12 })
  t.ok(lines.length <= 12)
  t.ok(lines[lines.length - 1].includes('truncated'))
})

test('bareTopSortProcessRows supports nice and cpu keys', async (t) => {
  const code = await readFile(helpersPath, 'utf8')
  const ctx = createContext({})
  runInContext(code, ctx)
  const rows = [
    { pid: 1, name: 'a', nice: 0 },
    { pid: 2, name: 'b', nice: 5 }
  ]
  const byNice = ctx.bareTopSortProcessRows(rows, 'nice', true)
  t.is(bareTopProcessPidLocal(byNice[0]), 1)
  const rows2 = [
    { pid: 1, name: 'a', cpuPct: 10 },
    { pid: 2, name: 'b', cpuPct: 99 }
  ]
  const byCpu = ctx.bareTopSortProcessRows(rows2, 'cpu', false)
  t.is(bareTopProcessPidLocal(byCpu[0]), 2)
})

test('bareTopLimitsMergedLines flattens quotas and rlimits', async (t) => {
  const code = await readFile(helpersPath, 'utf8')
  const ctx = createContext({})
  runInContext(code, ctx)
  const snap = {
    extra: { quotas: { pipe: 8 }, rlimits: { nofile: 1024 } }
  }
  const lines = ctx.bareTopLimitsMergedLines(snap)
  t.ok(lines.some((l) => l.includes('pipe=8')))
  t.ok(lines.some((l) => l.includes('nofile=1024')))
})

test('bareTopDelegateInflightTableLines right-aligns counts', async (t) => {
  const code = await readFile(helpersPath, 'utf8')
  const ctx = createContext({})
  runInContext(code, ctx)
  const lines = ctx.bareTopDelegateInflightTableLines({ a: 3, b: 12 }, 5, 8)
  t.ok(lines[0].includes('b') && lines[0].includes('12'))
  t.ok(lines[1].includes('a') && lines[1].includes('3'))
})

test('bareTopParseMeminfoMetrics derives MemTotal and MemAvailable', async (t) => {
  const code = await readFile(helpersPath, 'utf8')
  const ctx = createContext({})
  runInContext(code, ctx)
  const m = ctx.bareTopParseMeminfoMetrics(
    'MemTotal:       8000000 kB MemAvailable:   2000000 kB'
  )
  t.ok(m)
  t.is(m.memTotal, 8000000)
  t.is(m.memAvail, 2000000)
})

test('large net summary fixture benchmark stays within budget', async (t) => {
  const code = await readFile(helpersPath, 'utf8')
  const netRaw = await readFile(largeNetFixture, 'utf8')
  const net = JSON.parse(netRaw)
  const ctx = createContext({})
  runInContext(code, ctx)
  const started = Date.now()
  let lines = []
  for (let i = 0; i < 200; i++) {
    lines = ctx.bareTopNetTabLines(net, 120, { maxLines: 240 })
  }
  const elapsed = Date.now() - started
  t.ok(lines.length > 10)
  t.ok(elapsed < 350, 'net fixture benchmark elapsed=' + elapsed + 'ms')
})

function bareTopProcessPidLocal(row) {
  const n = Number(row.pid)
  return Number.isFinite(n) ? n : 0
}