# 2b full-chain proof (phone side): Android key -> v3 Text channel -> agent
# SendInput -> dedicated Windows target window, read back from that window.
# ASCII-only source (PS 5.1 + BOM-less = GBK corruption; see personal lessons).
# State checks use ASCII markers ("RTT=" / EditText presence) rather than
# matching the app's Chinese labels, for the same reason.
#
# Why ONE atomic script: SendInput lands on the FOREGROUND window, and Windows'
# foreground lock means a background process cannot simply reclaim it. This
# box's interactive GUI steals foreground between separate tool calls, so
# launch -> assert foreground -> drive phone -> read back must run without
# yielding. Every injection is preceded by a foreground assertion: if the target
# lost foreground we ABORT rather than inject into some other application.
#
# Prereqs: vivo device online via adb, app installed, v3 agent build present.
# Usage:
#   powershell -ExecutionPolicy Bypass -File tools\phone_chain_proof.ps1

param(
    [string]$PhoneIp = "192.168.1.180",
    [int]$Port = 47800,
    [string]$Code = "t"
)
$ErrorActionPreference = "Stop"
$repo = (Resolve-Path "$PSScriptRoot\..").Path
$adb  = "D:\working\android\sdk\platform-tools\adb.exe"
$tmp  = "$env:TEMP\remote-phone-proof"

New-Item -ItemType Directory -Force -Path $tmp | Out-Null
$pidFile    = "$tmp\target.pid"
$stopFile   = "$tmp\stop.flag"
$resultFile = "$tmp\received.txt"
Remove-Item $pidFile,$stopFile,$resultFile -ErrorAction SilentlyContinue

Add-Type -TypeDefinition @"
using System;
using System.Runtime.InteropServices;
public static class FgApi {
  [DllImport("user32.dll")] public static extern IntPtr GetForegroundWindow();
}
"@

function Adb {
    param([Parameter(Mandatory)][string[]]$AdbArgs)
    # adb writes progress ("1 file pulled...") to stderr; PS 5.1 with
    # $ErrorActionPreference=Stop turns every stderr line into a terminating
    # error. Same workaround build-android.ps1 documents: relax for native
    # calls, judge by exit code and captured stdout.
    $old = $ErrorActionPreference
    $ErrorActionPreference = "Continue"
    try {
        $out = & $adb @AdbArgs 2>$null
        return @{ out = ($out -join "`n"); code = $LASTEXITCODE }
    }
    finally { $ErrorActionPreference = $old }
}

function Adb-Shell {
    param([Parameter(Mandatory)][string[]]$Cmd)
    return Adb -AdbArgs (@("shell") + $Cmd)
}

function Wait-File {
    param([string]$Path, [int]$TimeoutMs = 20000)
    $t = 0
    while (-not (Test-Path $Path) -and $t -lt ($TimeoutMs / 150)) { Start-Sleep -Milliseconds 150; $t++ }
    if (-not (Test-Path $Path)) { throw "timeout waiting for $Path" }
}

function Assert-Foreground([IntPtr]$hwnd, [string]$where) {
    # Bounded wait, not a single instant check: the target re-asserts itself
    # every 60ms in proof mode, so a momentary steal by the interactive desktop
    # is recoverable. Still refuse to inject if it never comes back - a stray
    # injection lands in whatever window DOES hold foreground.
    $deadline = (Get-Date).AddMilliseconds(1500)
    while ((Get-Date) -lt $deadline) {
        if ([FgApi]::GetForegroundWindow() -eq $hwnd) { return }
        Start-Sleep -Milliseconds 30
    }
    throw "$where : foreground=$([FgApi]::GetForegroundWindow()) want=$hwnd after 1.5s - refusing to inject"
}

function Read-Received {
    Wait-File $resultFile 8000
    $b = [System.IO.File]::ReadAllBytes($resultFile)
    $s = [System.Text.Encoding]::UTF8.GetString($b)
    if ($s.Length -gt 0 -and $s[0] -eq [char]0xFEFF) { $s = $s.Substring(1) }
    return $s
}

function Get-PhoneUiText {
    [void](Adb-Shell @("uiautomator", "dump", "/sdcard/ui.xml"))
    $r = Adb -AdbArgs @("pull", "/sdcard/ui.xml", "$tmp\ui.xml")
    if ($r.code -ne 0 -or -not (Test-Path "$tmp\ui.xml")) { return "" }
    return [System.IO.File]::ReadAllText("$tmp\ui.xml", [System.Text.Encoding]::UTF8)
}

function Wait-For-LiveSession([int]$Seconds, [ref]$outXml) {
    $deadline = (Get-Date).AddSeconds($Seconds)
    while ((Get-Date) -lt $deadline) {
        Start-Sleep -Milliseconds 900
        $x = Get-PhoneUiText
        if ($x -match "RTT=") { $outXml.Value = $x; return $true }
    }
    $outXml.Value = (Get-PhoneUiText)
    return $false
}

Write-Host "=== 0. stale-agent guard (same rule as the desktop proof) ==="
$agentExe = "$repo\target\release\agent.exe"
$ag = Get-Process agent -ErrorAction SilentlyContinue
if ($ag -and (Get-Item $agentExe).LastWriteTime -gt $ag.StartTime) {
    Write-Host "  running agent predates current build; restarting it"
    Stop-Process -Name agent -Force -ErrorAction SilentlyContinue
    Start-Sleep -Milliseconds 800
    $ag = $null
}
if (-not $ag) {
    Start-Process $agentExe -ArgumentList "--port",$Port,"--code",$Code -WindowStyle Hidden
    Start-Sleep -Seconds 1
    Write-Host "  agent started (v3)"
}

Write-Host "=== 1. launch target window (own process, empty field) ==="
# Retire leftovers from earlier runs WITHOUT killing them. Killing a foreground
# window hands foreground to the next app (this box's interactive GUI), and the
# foreground lock then refuses a brand-new background process any claim - the
# new target could never take foreground back.
# Signal only stop files that ALREADY EXIST: creating a fresh one here would
# hit the stop path of the run we are about to start, and that target would
# close itself the moment it launched (seen 2026-10-30: pid reported then gone).
$existingFlags = @(Get-ChildItem -Path $env:TEMP -Recurse -Filter "stop.flag" -ErrorAction SilentlyContinue |
    Where-Object { $_.FullName -like "*remote*proof*" })
if ($existingFlags.Count -gt 0) {
    Write-Host "  retiring $($existingFlags.Count) earlier target(s) via their own stop file"
    foreach ($f in $existingFlags) { (Get-Item $f.FullName).LastWriteTime = Get-Date }
    Start-Sleep -Seconds 3
}
Start-Process powershell.exe -ArgumentList "-NoProfile","-ExecutionPolicy","Bypass",`
    "-File","$repo\tools\text_target.ps1","-PidFile",$pidFile,`
    "-ResultFile",$resultFile,"-StopFile",$stopFile,"-GrabForeground"
Wait-File $pidFile
# pid file carries "pid<n><hwnd>": the target writes its own handle once the
# form is realized, which removes the Get-Process MainWindowHandle race.
$parts = @((Get-Content $pidFile -Raw) -split "`n")
$tid = [int]$parts[0].Trim()
$hwnd = [IntPtr][long]$parts[1].Trim()
if ($hwnd -eq 0) { throw "target reported a null window handle" }
Assert-Foreground $hwnd "after launch"
Write-Host "  target pid=$tid hwnd=$($hwnd.ToInt64()) foreground=yes"

Write-Host "=== 2. start app, connect via intent extras ==="
[void](Adb-Shell @("am", "force-stop", "com.verify.remote"))
[void](Adb-Shell @("am", "start", "-n", "com.verify.remote/.MainActivity",
    "--es", "host", $PhoneIp, "--ei", "port", "$Port", "--es", "code", $Code))
$xmlRef = ""
if (-not (Wait-For-LiveSession 25 ([ref]$xmlRef))) { throw "phone never reported a live session (no RTT marker)" }
$script:xml = $xmlRef
Write-Host "  phone: $([regex]::Match($script:xml,'text="([^"]*RTT=[^"]*)"').Groups[1].Value)"
Assert-Foreground $hwnd "after connect"

Write-Host "=== 3. phone keys A B C -> Activity.onKeyDown -> v3 Text channel ==="
# 29/30/31 = KEYCODE_A/B/C. adb-injected keys arrive with a printable
# unicodeChar, so the app routes them to nativeSendText (IME hidden). That is
# the product path introduced in 2b, not a stand-in for it.
foreach ($k in 29,30,31) {
    Assert-Foreground $hwnd "before keyevent $k"
    [void](Adb-Shell @("input", "keyevent", "$k"))
    Start-Sleep -Milliseconds 250
}
$deadline = (Get-Date).AddSeconds(10)
$got = ""
while ((Get-Date) -lt $deadline) {
    $got = Read-Received
    if ($got -eq "abc") { break }
    Start-Sleep -Milliseconds 300
}
Write-Host "  target received: [$got]"
if ($got -ne "abc") {
    Write-Host "  foreground now: $([FgApi]::GetForegroundWindow()) target: $hwnd"
    throw "FULL-CHAIN FAIL: expected [abc] got [$got]"
}
Write-Host "  PASS: Android key -> v3 Text -> agent KEYEVENTF_UNICODE -> Windows window"

Write-Host "=== 4. phone ENTER (66): control key uses the scancode channel ==="
# Enter carries no printable unicodeChar, so it must go down the WinScancode
# path. Observable acceptance: session survives and keeps streaming (a
# single-line TextBox swallows Enter, so glyph-level proof is not possible).
Assert-Foreground $hwnd "before ENTER"
[void](Adb-Shell @("input", "keyevent", "66"))
Start-Sleep -Milliseconds 900
$xmlRef = ""
if (-not (Wait-For-LiveSession 6 ([ref]$xmlRef))) { throw "session died after ENTER" }
Write-Host "  session alive: $([regex]::Match($xmlRef,'text="([^"]*RTT=[^"]*)"').Groups[1].Value)"

Write-Host "=== 5. phone BACK (4): disconnect and return to form ==="
[void](Adb-Shell @("input", "keyevent", "4"))
Start-Sleep -Seconds 2
$xml2 = Get-PhoneUiText
if ($xml2 -match "RTT=") { throw "BACK did not disconnect (still live session)" }
if ($xml2 -notmatch "android\.widget\.EditText") { throw "BACK did not return to the form" }
Write-Host "  PASS: disconnected, form visible again"

Write-Host "=== 6. connect again FROM THE FORM (V4 through real UI, not intent) ==="
# Form typing uses keyevent, not 'adb input text': with the Chinese IME active,
# text injection gets composed (ASCII '.' becomes U+3002). We disable the IME,
# restore it in finally, and never assume a Chinese IME is absent.
$origIme = (Adb-Shell @("settings", "get", "secure", "default_input_method")).out.Trim()
Write-Host "  original IME: [$origIme]"
if ($origIme -and $origIme -ne "null") { [void](Adb-Shell @("ime", "disable", $origIme)) }
try {
    $xml3 = Get-PhoneUiText
    $fields = [regex]::Matches($xml3, '<node[^>]*class="android\.widget\.EditText"[^>]*bounds="\[(\d+),(\d+)\]\[(\d+),(\d+)\]"')
    if ($fields.Count -lt 3) { throw "expected 3 form fields, found $($fields.Count)" }
    function Center($m) {
        $a = [int]$m.Groups[1].Value; $b = [int]$m.Groups[2].Value
        $c = [int]$m.Groups[3].Value; $d = [int]$m.Groups[4].Value
        return @(([int](($a + $c) / 2)), ([int](($b + $d) / 2)))
    }
    $ipC = Center $fields[0]; $codeC = Center $fields[2]
    # KEYCODE_0=7..KEYCODE_9=16, PERIOD=56, DEL=67, T=48 (A=29 -> T=29+19;
    # all from javap against android-34, not memory)
    [void](Adb-Shell @("input", "tap", "$($ipC[0])", "$($ipC[1])"))
    Start-Sleep -Milliseconds 400
    for ($i = 0; $i -lt 24; $i++) { [void](Adb-Shell @("input", "keyevent", "67")) }
    foreach ($k in @(8,16,9,56,8,13,15,56,8,56,8,15,7)) {   # 192.168.1.180
        [void](Adb-Shell @("input", "keyevent", "$k"))
    }
    [void](Adb-Shell @("input", "tap", "$($codeC[0])", "$($codeC[1])"))
    Start-Sleep -Milliseconds 400
    for ($i = 0; $i -lt 6; $i++) { [void](Adb-Shell @("input", "keyevent", "67")) }
    [void](Adb-Shell @("input", "keyevent", "48"))
    $xml3 = Get-PhoneUiText
    # Attribute order in uiautomator dumps is text= ... class= ... bounds=;
    # matching "class=...text=" silently finds nothing (seen 2026-10-30: printed
    # an empty form line). Parse per-node and pull attributes independently.
    $vals = @()
    foreach ($n in [regex]::Matches($xml3, '<node[^>]*>')) {
        $v = $n.Value
        if ($v -match 'class="android\.widget\.EditText"') {
            $vals += [regex]::Match($v, 'text="([^"]*)"').Groups[1].Value
        }
    }
    # NOTE: an EMPTY EditText reports its hint as text (verified: text="被控端 IP"),
    # so "field text == typed value" is the assertion, not "field text non-empty".
    Write-Host "  form now: $($vals -join ' | ')"
    if ($vals.Count -lt 3) { throw "expected 3 fields after typing, got $($vals.Count)" }
    if ($vals[0] -ne "192.168.1.180") { throw "V4 FAIL: IP field is [$($vals[0])], typing did not land" }
    $btn = [regex]::Match($xml3, '<node[^>]*class="android\.widget\.Button"[^>]*bounds="\[(\d+),(\d+)\]\[(\d+),(\d+)\]"')
    if (-not $btn.Success) { throw "connect button not found" }
    $bc = Center $btn
    Assert-Foreground $hwnd "before form connect"
    [void](Adb-Shell @("input", "tap", "$($bc[0])", "$($bc[1])"))
    $xmlRef = ""
    if (-not (Wait-For-LiveSession 25 ([ref]$xmlRef))) {
        $shown = [regex]::Matches($xmlRef, 'text="([^"]+)"') | ForEach-Object { $_.Groups[1].Value }
        throw "V4 FAIL: form connect did not reach a live session. screen=[$($shown -join ' | ')]"
    }
    Write-Host "  V4 PASS via form UI: $([regex]::Match($xmlRef,'text="([^"]*RTT=[^"]*)"').Groups[1].Value)"
}
finally {
    if ($origIme -and $origIme -ne "null") {
        [void](Adb-Shell @("ime", "enable", $origIme))
        [void](Adb-Shell @("ime", "set", $origIme))
        Write-Host "  IME restored: $((Adb-Shell @("settings", "get", "secure", "default_input_method")).out.Trim())"
    }
}

Write-Host "=== 7. stop target ==="
New-Item -ItemType File -Force -Path $stopFile | Out-Null
Start-Sleep -Milliseconds 600
Write-Host "=== PHONE CHAIN PROOF COMPLETE ==="