# Start the Windows app and check its resize border (#1381): as soon as the window exists (before
# the first frame), Windows' hit test reports a resize edge or corner within the resize-border
# width of every side and the client area inside it; a maximized window has none; and a real
# press-and-drag on the bottom edge (SetCursorPos + mouse input) resizes the window.
#
# What this can't check on a CI runner (one monitor at 100 %): moving the window between monitors
# with different scales, and the resize border's width at other scales (unit tests cover the sizes).
#
# Usage: tools/windows-resize-smoke.ps1 -Exe target\ci\solidcraft.exe
param([Parameter(Mandatory = $true)][string]$Exe)
$ErrorActionPreference = 'Stop'

Add-Type @'
using System;
using System.Runtime.InteropServices;
public static class Win {
    [StructLayout(LayoutKind.Sequential)] public struct RECT { public int Left, Top, Right, Bottom; }
    [StructLayout(LayoutKind.Sequential)] public struct POINT { public int X, Y; }
    [DllImport("user32.dll")] public static extern bool GetWindowRect(IntPtr h, out RECT r);
    [DllImport("user32.dll")] public static extern bool SetWindowPos(IntPtr h, IntPtr after, int x, int y, int cx, int cy, uint flags);
    [DllImport("user32.dll")] public static extern IntPtr SendMessageW(IntPtr h, uint msg, IntPtr w, IntPtr l);
    [DllImport("user32.dll")] public static extern bool ShowWindow(IntPtr h, int cmd);
    [DllImport("user32.dll")] public static extern bool IsZoomed(IntPtr h);
    [DllImport("user32.dll")] public static extern bool SetForegroundWindow(IntPtr h);
    [DllImport("user32.dll")] public static extern bool SetCursorPos(int x, int y);
    [DllImport("user32.dll")] public static extern bool GetCursorPos(out POINT p);
    [DllImport("user32.dll")] public static extern void mouse_event(uint flags, int dx, int dy, uint data, UIntPtr extra);
    [DllImport("user32.dll")] public static extern uint GetDpiForWindow(IntPtr h);
    [DllImport("user32.dll")] public static extern int GetSystemMetrics(int i);
    [DllImport("user32.dll")] public static extern int GetSystemMetricsForDpi(int i, uint dpi);
    [DllImport("user32.dll")] public static extern bool IsWindowVisible(IntPtr h);
    [DllImport("user32.dll", CharSet = CharSet.Unicode)] public static extern int GetWindowTextW(IntPtr h, System.Text.StringBuilder s, int n);
    [DllImport("user32.dll", CharSet = CharSet.Unicode)] public static extern int GetClassNameW(IntPtr h, System.Text.StringBuilder s, int n);
    [DllImport("user32.dll")] public static extern uint GetWindowThreadProcessId(IntPtr h, out uint pid);
    public delegate bool EnumProc(IntPtr h, IntPtr l);
    [DllImport("user32.dll")] public static extern bool EnumWindows(EnumProc f, IntPtr l);
    public static string Text(IntPtr h) { var s = new System.Text.StringBuilder(256); GetWindowTextW(h, s, 256); return s.ToString(); }
    public static string Class(IntPtr h) { var s = new System.Text.StringBuilder(256); GetClassNameW(h, s, 256); return s.ToString(); }
    // The process's visible top-level window titled SolidCraft (the app's main window; the
    // process has other top-level windows, such as the IME's).
    public static IntPtr MainWindow(uint pid) {
        IntPtr found = IntPtr.Zero;
        EnumWindows((h, l) => {
            uint p; GetWindowThreadProcessId(h, out p);
            if (p == pid && IsWindowVisible(h) && Text(h).StartsWith("SolidCraft")) { found = h; return false; }
            return true;
        }, IntPtr.Zero);
        return found;
    }
    public static int HitTest(IntPtr h, int x, int y) {
        long l = ((long)(ushort)(short)y << 16) | (long)(ushort)(short)x;
        return (int)SendMessageW(h, 0x0084 /* WM_NCHITTEST */, IntPtr.Zero, new IntPtr(l));
    }
}
'@

$HT = @{ 1 = 'client'; 10 = 'left'; 11 = 'right'; 12 = 'top'; 13 = 'top-left'; 14 = 'top-right'; 15 = 'bottom'; 16 = 'bottom-left'; 17 = 'bottom-right' }
$failures = New-Object System.Collections.Generic.List[string]
function Check([bool]$ok, [string]$what) {
    if ($ok) { Write-Host "ok: $what" } else { Write-Host "FAIL: $what"; $failures.Add($what) }
}
function Rect($h) { $r = New-Object Win+RECT; [void][Win]::GetWindowRect($h, [ref]$r); $r }

# Every side and corner, `in` px inside the window's outer pixel, and points just past the border.
function CheckBorder($h, [string]$when) {
    $r = Rect $h
    $dpi = [Win]::GetDpiForWindow($h)
    # Windows' own resize border at this DPI (SM_CXSIZEFRAME + SM_CXPADDEDBORDER), as the app uses it.
    $b = [Win]::GetSystemMetricsForDpi(32, $dpi) + [Win]::GetSystemMetricsForDpi(92, $dpi)
    Check ($b -ge 1) "$when : a resize border of $b px"
    $cx = [int](($r.Left + $r.Right) / 2); $cy = [int](($r.Top + $r.Bottom) / 2)
    $l = $r.Left; $t = $r.Top; $rt = $r.Right - 1; $bt = $r.Bottom - 1
    Write-Host "$when : window $($r.Left),$($r.Top) - $($r.Right),$($r.Bottom) at $dpi DPI, border $b px"
    $cases = @(
        @($l, $cy, 10), @(($l + $b - 1), $cy, 10), @(($l + $b), $cy, 1),
        @($rt, $cy, 11), @(($rt - $b + 1), $cy, 11), @(($rt - $b), $cy, 1),
        @($cx, $t, 12), @($cx, ($t + $b - 1), 12), @($cx, ($t + $b), 1),
        @($cx, $bt, 15), @($cx, ($bt - $b + 1), 15), @($cx, ($bt - $b), 1),
        @($l, $t, 13), @($rt, $t, 14), @($l, $bt, 16), @($rt, $bt, 17),
        @(($l + 2 * $b - 1), $t, 13), @($rt, ($bt - 2 * $b + 1), 17),
        @($cx, $cy, 1)
    )
    foreach ($c in $cases) {
        $got = [Win]::HitTest($h, $c[0], $c[1])
        Check ($got -eq $c[2]) "$when hit test at ($($c[0]), $($c[1])): $($HT[$got]) ($got), want $($HT[$c[2]])"
    }
}

$port = 47901
$root = Join-Path $env:RUNNER_TEMP 'resize-smoke'
Remove-Item -Recurse -Force $root -ErrorAction SilentlyContinue
$settings = Join-Path ([Environment]::GetFolderPath('ApplicationData')) 'SolidCraft\data'
Remove-Item -Recurse -Force $settings -ErrorAction SilentlyContinue
$local = Join-Path $root 'local'
$crashes = Join-Path $root 'crashes'
New-Item -ItemType Directory -Force $settings, $local, $crashes | Out-Null
$token = -join ((1..64) | ForEach-Object { '{0:x}' -f (Get-Random -Maximum 16) })

$psi = New-Object System.Diagnostics.ProcessStartInfo
$psi.FileName = (Resolve-Path $Exe).Path
foreach ($a in @('--sample', '--control', "$port")) { [void]$psi.ArgumentList.Add($a) }
$psi.UseShellExecute = $false
$psi.RedirectStandardError = $true
$psi.RedirectStandardOutput = $true
$psi.Environment['LOCALAPPDATA'] = $local
$psi.Environment['SOLIDCRAFT_CRASH_DIR'] = $crashes
$psi.Environment['SOLIDCRAFT_CONTROL_TOKEN'] = $token
$p = [System.Diagnostics.Process]::Start($psi)
$stderr = $p.StandardError.ReadToEndAsync()
$stdout = $p.StandardOutput.ReadToEndAsync()

try {
    # The window as soon as it shows (eframe creates it hidden and shows it after the first frame).
    $h = [IntPtr]::Zero
    $deadline = (Get-Date).AddSeconds(180)
    while ($h -eq [IntPtr]::Zero -and (Get-Date) -lt $deadline -and -not $p.HasExited) {
        $h = [Win]::MainWindow([uint32]$p.Id)
        if ($h -eq [IntPtr]::Zero) { Start-Sleep -Milliseconds 20 }
    }
    if ($h -eq [IntPtr]::Zero) { throw "no window (exited: $($p.HasExited))" }
    Write-Host "window: '$([Win]::Text($h))' class '$([Win]::Class($h))'"
    CheckBorder $h 'first sight'

    $client = $null
    while (-not $client -and (Get-Date) -lt $deadline -and -not $p.HasExited) {
        try { $client = New-Object System.Net.Sockets.TcpClient('127.0.0.1', $port) } catch { Start-Sleep -Milliseconds 500 }
    }
    if (-not $client) { throw "no control channel (exited: $($p.HasExited))" }
    $client.ReceiveTimeout = 120000
    $stream = $client.GetStream()
    $writer = New-Object System.IO.StreamWriter($stream)
    $writer.AutoFlush = $true
    $reader = New-Object System.IO.StreamReader($stream)
    $writer.WriteLine((@{ id = 1; token = $token; method = 'ui.screenshot'; params = @{ path = (Join-Path $root 'first.png') } } | ConvertTo-Json -Compress))
    Write-Host "first frame: $($reader.ReadLine())"

    # A known place and size that fits the runner's screen (physical px; the minimum is 960 x 600).
    $sw = [Win]::GetSystemMetrics(0); $sh = [Win]::GetSystemMetrics(1)
    Write-Host "screen: $sw x $sh"
    [void][Win]::SetWindowPos($h, [IntPtr]::Zero, 20, 20, [Math]::Min(1000, $sw - 40), [Math]::Min(620, $sh - 140), 0x0014) # NOZORDER | NOACTIVATE
    Start-Sleep -Milliseconds 500
    CheckBorder $h 'restored'

    # A real drag on the bottom edge, if this session takes mouse input.
    $before = Rect $h
    [void][Win]::SetForegroundWindow($h)
    $x = [int](($before.Left + $before.Right) / 2); $y = $before.Bottom - 2
    [void][Win]::SetCursorPos($x, $y)
    $pt = New-Object Win+POINT; [void][Win]::GetCursorPos([ref]$pt)
    if ($pt.X -ne $x -or $pt.Y -ne $y) {
        Write-Host "skipped: the drag (this session doesn't move the pointer: at $($pt.X),$($pt.Y))"
    } else {
        Start-Sleep -Milliseconds 300
        [Win]::mouse_event(0x0002, 0, 0, 0, [UIntPtr]::Zero) # LEFTDOWN
        $grow = [Math]::Min(80, $sh - $y - 10)
        for ($i = 1; $i -le 8; $i++) {
            Start-Sleep -Milliseconds 40
            [void][Win]::SetCursorPos($x, $y + [int]($grow * $i / 8))
            [Win]::mouse_event(0x0001, 0, 0, 0, [UIntPtr]::Zero) # MOVE (relative 0: the position above)
        }
        Start-Sleep -Milliseconds 100
        [Win]::mouse_event(0x0004, 0, 0, 0, [UIntPtr]::Zero) # LEFTUP
        Start-Sleep -Milliseconds 500
        $after = Rect $h
        $dh = ($after.Bottom - $after.Top) - ($before.Bottom - $before.Top)
        Check ($dh -ge $grow - 4 -and $after.Top -eq $before.Top) "dragging the bottom edge down $grow px resizes the window (height +$dh, top $($before.Top) -> $($after.Top))"
    }

    # Maximized: no resize border, the whole window is client area.
    [void][Win]::ShowWindow($h, 3) # SW_MAXIMIZE
    Start-Sleep -Milliseconds 500
    if ([Win]::IsZoomed($h)) {
        # The maximized window's rect overhangs the screen by the hidden frame (Windows' own
        # frame answers there); the screen's left edge is where the pointer can be.
        $r = Rect $h
        $x = [Math]::Max($r.Left, 0) + 1
        $got = [Win]::HitTest($h, $x, [int](($r.Top + $r.Bottom) / 2))
        Check ($got -eq 1) "maximized ($($r.Left),$($r.Top) - $($r.Right),$($r.Bottom)), the screen's left edge is client area ($($HT[$got]))"
    } else {
        Check $false 'the window maximizes'
    }
    [void][Win]::ShowWindow($h, 9) # SW_RESTORE
    Start-Sleep -Milliseconds 500
    CheckBorder $h 'restored again'

    $writer.WriteLine((@{ id = 2; method = 'app.quit'; params = @{ force = $true } } | ConvertTo-Json -Compress))
    Write-Host "quit: $($reader.ReadLine())"
    $client.Close()
    if (-not $p.WaitForExit(60000)) { throw 'did not exit after app.quit' }
    if ($p.ExitCode -ne 0) { throw ('exit code 0x{0:x}' -f $p.ExitCode) }
} catch {
    $failures.Add($_.Exception.Message)
} finally {
    if (-not $p.HasExited) { $p.Kill(); $p.WaitForExit() }
}
Write-Host $stderr.Result
if ($failures.Count -gt 0) { Write-Error ("resize border: " + ($failures -join '; ')) }
Write-Host 'PASS: resize border'