#!/usr/bin/env bash
# Drive the dsh-sync app inside MuMu Player 12 from the command line.
#
#   bash android/emulator.sh start              # boot the VM, wait for adb
#   bash android/emulator.sh install            # build + install + launch
#   bash android/emulator.sh shot [out.png]     # capture just the app's window
#   bash android/emulator.sh tap X Y            # tap in APP coordinates (0..1080 x 0..1920)
#   bash android/emulator.sh text "..."         # type into the focused field
#   bash android/emulator.sh key <keyevent>     # e.g. 66 = Enter, 4 = Back
#   bash android/emulator.sh deeplink <url>     # http://ip:8020/app#invite=<code>
#   bash android/emulator.sh ui                 # dump visible text from the WebView
#   bash android/emulator.sh log [n]
#
# Two MuMu behaviours drive the design here, both learned the hard way:
#
#  1. Every app gets its OWN virtual display, and the logical display id is
#     re-assigned on every boot (0, then 3, then 6, then 8, then 11 across one
#     session). `adb shell input tap` without `-d` goes to display 0, i.e. the
#     launcher — taps appear to do nothing while the app is visibly on screen.
#     Every input call below resolves the app's current display and passes -d.
#
#  2. `screencap` cannot capture the app's display: the compositor refuses with
#     "Status: -2" for MuMu's app displays. Screenshots therefore come from the
#     host window (see the CUA path) or from `screencap -a`; this script shells
#     out to the window capture for `shot`.
set -uo pipefail

MUMU="${MUMU_HOME:-/c/Program Files/Netease/MuMu}"
ADB="$MUMU/nx_main/adb.exe"
MANAGER="$MUMU/nx_main/MuMuManager.exe"
SERIAL="${MUMU_SERIAL:-127.0.0.1:16384}"
PKG="com.dsh.sync"
APK="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)/data/dist/dsh-sync.apk"

# Git Bash rewrites /sdcard/... into a Windows path; this disables that.
export MSYS_NO_PATHCONV=1

adb_() { "$ADB" -s "$SERIAL" "$@"; }

ensure_serial() {
  if ! adb_ get-state >/dev/null 2>&1; then
    "$ADB" connect "$SERIAL" >/dev/null 2>&1
  fi
}

# Logical display currently hosting our activity, or empty.
#
# The imeInputTarget line names whichever window holds the input focus, so it
# must be filtered down to our own package first — otherwise the launcher's
# line matches and every tap lands on display 0.
app_display() {
  adb_ shell dumpsys window windows 2>/dev/null | tr -d '\r' |
    grep -E "imeInputTarget in display#" |
    grep -F "$PKG" |
    grep -oE "display# ?[0-9]+" | grep -oE "[0-9]+$" | head -1
}

require_app() {
  local d; d="$(app_display)"
  if [ -z "$d" ]; then
    echo "app is not on screen — run: $0 start" >&2
    exit 1
  fi
  printf '%s' "$d"
}

case "${1:-}" in
  start)
    "$MANAGER" control -v 0 launch >/dev/null 2>&1
    for i in $(seq 1 40); do
      sleep 5
      ensure_serial
      if [ "$(adb_ shell getprop sys.boot_completed 2>/dev/null | tr -d '\r')" = "1" ]; then
        echo "booted after $((i * 5))s"
        # A stale proxy silently blackholes every WebView request (Chromium
        # honours the system proxy; netcat does not, so the network looks fine).
        adb_ shell settings delete global http_proxy >/dev/null 2>&1
        adb_ shell settings delete global global_http_proxy_host >/dev/null 2>&1
        adb_ shell settings delete global global_http_proxy_port >/dev/null 2>&1
        echo "proxy cleared"
        exit 0
      fi
    done
    echo "boot timed out" >&2; exit 1
    ;;

  install)
    [ -f "$APK" ] || { echo "missing $APK — run android/build.sh first" >&2; exit 1; }
    adb_ install -r "$APK" | tail -1
    adb_ shell am start -n "$PKG/.MainActivity" >/dev/null
    echo launched
    ;;

  deeplink)
    # Explicit component: Android only offers a bare http URL to browsers, so an
    # implicit VIEW intent never reaches this app.
    adb_ shell am start -n "$PKG/.MainActivity" \
      -a android.intent.action.VIEW -d "$2" >/dev/null
    echo "sent $2"
    ;;

  tap)
    d="$(require_app)"
    adb_ shell input -d "$d" tap "$2" "$3"
    ;;

  text)
    d="$(require_app)"
    adb_ shell input -d "$d" text "$2"
    ;;

  key)
    d="$(require_app)"
    adb_ shell input -d "$d" keyevent "$2"
    ;;

  swipe)
    d="$(require_app)"
    adb_ shell input -d "$d" swipe "$2" "$3" "$4" "$5" "${6:-300}"
    ;;

  ui)
    # dumpsys window gives the WebView's text without needing a screenshot.
    d="$(require_app)"
    adb_ shell uiautomator dump //sdcard/_ui.xml >/dev/null 2>&1
    adb_ shell cat //sdcard/_ui.xml 2>/dev/null |
      tr '>' '\n' | grep -oE 'text="[^"]+"' | sed 's/text=//' | tr -d '"'
    ;;

  shot)
    # screencap refuses MuMu's app displays, so capture through the host window.
    out="${2:-$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)/_mumu_shot.png}"
    "$MUMU/nx_main/MuMuManager.exe" >/dev/null 2>&1
    powershell -NoProfile -Command "
      Add-Type -AssemblyName System.Drawing,System.Windows.Forms
      \$b = [System.Windows.Forms.Screen]::PrimaryScreen.Bounds
      \$bmp = New-Object System.Drawing.Bitmap \$b.Width, \$b.Height
      \$g = [System.Drawing.Graphics]::FromImage(\$bmp)
      \$g.CopyFromScreen(\$b.Location, [System.Drawing.Point]::Empty, \$b.Size)
      \$bmp.Save('$out')
    " >/dev/null 2>&1
    [ -s "$out" ] && echo "$out" || { echo "capture failed" >&2; exit 1; }
    ;;

  status)
    ensure_serial
    echo "serial      : $SERIAL"
    echo "boot        : $(adb_ shell getprop sys.boot_completed 2>/dev/null | tr -d '\r')"
    echo "app display : $(app_display)"
    echo "app pid     : $(adb_ shell pidof $PKG 2>/dev/null | tr -d '\r')"
    echo "proxy       : $(adb_ shell settings get global http_proxy 2>/dev/null | tr -d '\r')"
    echo "foreground  : $(adb_ shell dumpsys activity activities 2>/dev/null | tr -d '\r' | grep -m1 topResumedActivity | sed 's/.*u0 //')"
    ;;

  log)
    adb_ logcat -d -t "${2:-80}" 2>/dev/null | grep -iE "dsh|chromium|AndroidRuntime|FATAL" | tail -25
    ;;

  *)
    sed -n '2,22p' "$0"
    ;;
esac