import { spawnSync } from 'node:child_process'
import { mkdirSync, readFileSync, writeFileSync } from 'node:fs'
import { mkdir, writeFile } from 'node:fs/promises'
import { resolve } from 'node:path'

const root = resolve(new URL('..', import.meta.url).pathname)
const executable = resolve(root, '.cache/freecad/install-desktop/bin/FreeCAD')
const probe = resolve(root, 'scripts/freecad-gui-workflow-oracle.py')
const sysroot = resolve(root, '.cache/freecad/sysroot')
const outputDirectory = resolve(root, '.cache/freecad/gui-workflow-oracle')
const resultFile = resolve(outputDirectory, 'partdesign-pad-success-result.json')
const reportPath = resolve(root, 'config/freecad-gui-workflow-oracle.json')
const configDirectory = resolve(outputDirectory, 'config')
const userConfig = resolve(configDirectory, 'user.cfg')
const systemConfig = resolve(configDirectory, 'system.cfg')
const marker = 'FREECAD_GUI_WORKFLOW_RESULT='
const timeoutMs = Number(process.env.FREECAD_GUI_WORKFLOW_TIMEOUT_MS || 120_000)
const fail = (message) => { throw new Error(`FreeCAD GUI workflow oracle: ${message}`) }

await mkdir(outputDirectory, { recursive: true })
mkdirSync(configDirectory, { recursive: true })
const emptyConfig = '<?xml version="1.0" encoding="UTF-8" standalone="no" ?>\n<FCParameters><FCParamGroup Name="Root"/></FCParameters>\n'
writeFileSync(userConfig, emptyConfig)
writeFileSync(systemConfig, emptyConfig)

const runtimeEnv = {
  ...process.env,
  PYTHONPATH: `${resolve(sysroot, 'usr/lib/python3/dist-packages')}${process.env.PYTHONPATH ? `:${process.env.PYTHONPATH}` : ''}`,
  LD_LIBRARY_PATH: `${resolve(sysroot, 'usr/lib/x86_64-linux-gnu')}${process.env.LD_LIBRARY_PATH ? `:${process.env.LD_LIBRARY_PATH}` : ''}`,
  MATPLOTLIBRC: resolve(sysroot, 'usr/share/matplotlib/mpl-data/matplotlibrc'),
  MPLBACKEND: 'Agg',
  FREECAD_GUI_WORKFLOW_RESULT_FILE: resultFile,
}
const execution = spawnSync('xvfb-run', ['-a', executable, '--user-cfg', userConfig, '--system-cfg', systemConfig, '--python-path', resolve(sysroot, 'usr/lib/python3/dist-packages'), probe], {
  cwd: root,
  encoding: 'utf8',
  maxBuffer: 32 * 1024 * 1024,
  timeout: timeoutMs,
  env: runtimeEnv,
})
const output = `${execution.stdout ?? ''}\n${execution.stderr ?? ''}`
const markerLine = output.split(/\r?\n/).find((line) => line.startsWith(marker))
const resultBytes = (() => { try { return readFileSync(resultFile, 'utf8') } catch { return '' } })()
if (execution.error || (execution.status !== 0 && !resultBytes && !markerLine)) fail(`native probe exited with ${execution.status}: ${[execution.error?.message, output.trim()].filter(Boolean).join('\n')}`)
const result = JSON.parse(resultBytes || markerLine.slice(marker.length))
if (result.freecadVersion !== '1.1.1' || result.gitCommit !== '0108fd4b4850cc46e625b60e53cea7a7bbe69f8d') fail(`native baseline mismatch: ${JSON.stringify(result)}`)
if (result.workflowId !== 'partdesign-pad-task' || result.commandId !== 'PartDesign_Pad' || result.state !== 'success' || result.success !== true) fail(`Pad success workflow failed: ${JSON.stringify(result)}`)

const report = {
  schemaVersion: 1,
  baseline: {
    freecadVersion: result.freecadVersion,
    commit: result.gitCommit,
    profile: 'desktop-xvfb-isolated-config',
  },
  generatedBy: './npmw run probe:freecad-gui-workflow',
  checkedBy: './npmw run check:freecad-gui-workflow',
  family: {
    id: result.workflowId,
    primaryCommand: result.commandId,
    exactTask: 'EX-UI-03',
    source: '.cache/freecad/FreeCAD/src/Mod/PartDesign/Gui/Command.cpp',
  },
  workflows: {
    success: result,
  },
  remainingStates: ['disabled', 'failure', 'cancel', 'recovery'],
  exactPromotionReady: false,
}
await writeFile(reportPath, `${JSON.stringify(report, null, 2)}\n`)
console.log(JSON.stringify({
  status: 'freecad-gui-workflow-generated',
  family: report.family.id,
  command: report.family.primaryCommand,
  state: result.state,
  bodyTip: result.after.bodyTip,
  volume: result.after.pad.volume,
  taskOpened: result.taskPanel.opened.activeDialog,
  taskClosed: !result.taskPanel.closed.activeDialog,
  report: 'config/freecad-gui-workflow-oracle.json',
}, null, 2))