import { spawnSync } from 'node:child_process'
import { readFileSync } from 'node:fs'
function git(args,input) {
    const out=spawnSync('git',args,{input,encoding:'utf8'})
    if(out.status!==0) throw new Error(out.stderr)
    return out.stdout
}
function replaceOnce(text,oldValue,newValue) {
    if(text.split(oldValue).length!==2) throw new Error('Expected exactly one stage anchor: '+oldValue.slice(0,70))
    return text.replace(oldValue,newValue)
}
const head=git(['rev-parse','HEAD']).trim()
const paths=['src/modules/cockpit/services/cesiumPipeLayer.js','src/modules/cockpit/services/mapService.js','src/modules/cockpit/components/MapInfoPanel.vue']
for(const path of paths) {
    let staged=git(['show',`${head}:${path}`])
    const current=readFileSync(path,'utf8').replace(/\r\n/g,'\n')
    if(path.endsWith('cesiumPipeLayer.js')) {
        const commentStart=' * 渲染口径'
        const a=staged.indexOf(commentStart),b=staged.indexOf('\n */',a)
        const c=current.indexOf(commentStart),d=current.indexOf('\n */',c)
        staged=staged.slice(0,a)+current.slice(c,d)+staged.slice(b)
        const constants=current.slice(current.indexOf('// Viewer-scoped'),current.indexOf('/** 与 `cesiumEngine'))
        staged=replaceOnce(staged,'/** 与 `cesiumEngine',constants+'/** 与 `cesiumEngine')
        staged=replaceOnce(staged,'export async function syncPipeLayer(viewer, network) {','export async function syncPipeLayer(viewer, network, { onModelChange = () => {} } = {}) {')
        const versions='    const version = (layerVersions.get(viewer) || 0) + 1\n    layerVersions.set(viewer, version)\n'
        staged=replaceOnce(staged,'    clearIndex(viewer)\n',versions+'    clearIndex(viewer)\n')
        staged=replaceOnce(staged,'    const source = await ensureSource(viewer)\n','    const source = await ensureSource(viewer)\n    if (layerVersions.get(viewer) !== version) return { pipes: 0, components: 0, rendered: false }\n')
        const models=current.slice(current.indexOf('    // Keep fallback entities'),current.indexOf('    return { pipes: pipes.length',current.indexOf('    // Keep fallback entities')))
        staged=replaceOnce(staged,'    return { pipes: pipes.length, components: components.length, rendered: true }',models+'    return { pipes: pipes.length, components: components.length, rendered: true }')
        const cleanup=current.slice(current.indexOf('    if (viewer) layerVersions'),current.indexOf('    const source = viewer &&'))
        staged=replaceOnce(staged,'    const source = viewer &&',cleanup+'    const source = viewer &&')
    } else if(path.endsWith('mapService.js')) {
        staged=replaceOnce(staged,'    if (record.viewer) {\n        record.engine.destroyViewer(record.viewer)','    if (record.viewer) {\n        if (record.pipeLayer) record.pipeLayer.clearPipeLayer(record.viewer)\n        record.engine.destroyViewer(record.viewer)')
        const old="    const engine = await import('./cesiumPipeLayer.js')\n    await engine.syncPipeLayer(instance.viewer, layer)\n    const host = instance.host"
        const start=current.indexOf('    const record = instance\n    const engine = await import(\'./cesiumPipeLayer.js\')')
        const end=current.indexOf('    const host = record.host\n    if (host',start)+'    const host = record.host'.length
        if(start<0||end<start) throw new Error('Missing service stage block')
        staged=replaceOnce(staged,old,current.slice(start,end))
    } else {
        const noteStart=current.indexOf('        <p class="map-info__note" data-pipe-model-note>')
        const noteEnd=current.indexOf('        <!-- 坐标准入',noteStart)
        staged=replaceOnce(staged,'        <!-- 坐标准入',current.slice(noteStart,noteEnd)+'        <!-- 坐标准入')
        const script=current.slice(current.indexOf("import { PIPE_MODEL_NOTE }"),current.indexOf('defineProps({'))
        staged=replaceOnce(staged,'defineProps({',script+'defineProps({')
        staged=replaceOnce(staged,'    if (host) {\n        observer','    if (host) {\n        modelHost = host\n        host.addEventListener(\'cockpit-pipe-model-state\', updatePipeModelState)\n        observer')
        staged=replaceOnce(staged,'onBeforeUnmount(() => {\n    if (observer)','onBeforeUnmount(() => {\n    if (modelHost) modelHost.removeEventListener(\'cockpit-pipe-model-state\', updatePipeModelState)\n    modelHost = null\n    if (observer)')
    }
    if(git(['rev-parse','HEAD']).trim()!==head) throw new Error('HEAD changed during staging')
    const hash=git(['hash-object','-w','--stdin'],staged).trim()
    git(['update-index','--cacheinfo',`100644,${hash},${path}`])
}
console.log('Staged only ticket32 text replacements against fixed HEAD; working tree preserved')