#!/usr/bin/env bash
# Start Android emulator in headless mode with logging
set -euo pipefail

export ANDROID_HOME="$HOME/Android/Sdk"
export ANDROID_SDK_ROOT="$ANDROID_HOME"
export PATH="$ANDROID_HOME/emulator:$ANDROID_HOME/platform-tools:$HOME/flutter/bin:$PATH"

AVD_NAME="Pixel_7_API_35"
EMU_LOG="/tmp/emulator.log"
BOOT_LOG="/tmp/emulator-boot.log"

# Kill any existing emulator
if adb devices 2>/dev/null | grep -q "emulator"; then
    echo "[$(date)] Killing existing emulator..." | tee -a "$BOOT_LOG"
    adb emu kill 2>/dev/null || true
    sleep 2
fi

# Kill any stale emulator processes
pkill -f "qemu-system-x86_64" 2>/dev/null || true
sleep 1

# Clear old logs
> "$EMU_LOG"
> "$BOOT_LOG"

echo "[$(date)] Starting emulator: $AVD_NAME" | tee -a "$BOOT_LOG"
echo "[$(date)] Emulator log: $EMU_LOG" | tee -a "$BOOT_LOG"
echo "[$(date)] Boot log: $BOOT_LOG" | tee -a "$BOOT_LOG"

# Start emulator in background with:
# - KVM hardware acceleration (auto-detected)
# - swiftshader for GPU (headless-compatible)
# - no audio/window for CI/headless use
# - no snapshot for clean boot
nohup emulator -avd "$AVD_NAME" \
    -no-audio \
    -no-window \
    -gpu swiftshader_indirect \
    -no-snapshot-save \
    -no-metrics \
    -wipe-data \
    > "$EMU_LOG" 2>&1 &

EMU_PID=$!
echo "[$(date)] Emulator PID: $EMU_PID" | tee -a "$BOOT_LOG"

# Wait for boot to complete (timeout 120s)
echo "[$(date)] Waiting for device to come online..." | tee -a "$BOOT_LOG"
TIMEOUT=120
ELAPSED=0

# First wait for adb to see the device
while ! adb devices 2>/dev/null | grep -q "emulator"; do
    if [ $ELAPSED -ge $TIMEOUT ]; then
        echo "[$(date)] TIMEOUT: Device never appeared in adb" | tee -a "$BOOT_LOG"
        echo "[$(date)] Last emulator log lines:" | tee -a "$BOOT_LOG"
        tail -20 "$EMU_LOG" | tee -a "$BOOT_LOG"
        exit 1
    fi
    sleep 2
    ELAPSED=$((ELAPSED + 2))
    echo "[$(date)] Waiting for adb device... (${ELAPSED}s)" >> "$BOOT_LOG"
done

echo "[$(date)] Device visible in adb, waiting for boot completion..." | tee -a "$BOOT_LOG"

# Now wait for boot_completed
while [ "$(adb shell getprop sys.boot_completed 2>/dev/null | tr -d '\r')" != "1" ]; do
    if [ $ELAPSED -ge $TIMEOUT ]; then
        echo "[$(date)] TIMEOUT: Boot did not complete within ${TIMEOUT}s" | tee -a "$BOOT_LOG"
        echo "[$(date)] Boot animation state: $(adb shell getprop init.svc.bootanim 2>/dev/null)" | tee -a "$BOOT_LOG"
        echo "[$(date)] Last emulator log lines:" | tee -a "$BOOT_LOG"
        tail -20 "$EMU_LOG" | tee -a "$BOOT_LOG"
        exit 1
    fi
    sleep 2
    ELAPSED=$((ELAPSED + 2))
    echo "[$(date)] Waiting for boot... (${ELAPSED}s)" >> "$BOOT_LOG"
done

echo "[$(date)] Emulator booted successfully in ${ELAPSED}s!" | tee -a "$BOOT_LOG"
echo "[$(date)] Device: $(adb devices | grep emulator)" | tee -a "$BOOT_LOG"
adb shell getprop ro.build.version.sdk 2>/dev/null | xargs -I{} echo "[$(date)] API level: {}" | tee -a "$BOOT_LOG"