#!/bin/sh
PATH=/data/adb/ap/bin:/data/adb/ksu/bin:/data/adb/magisk:/data/data/com.termux/files/usr/bin:$PATH
die() { echo "Error: $@!"; exit 1; }

find_busybox() {
    command -v busybox "$@"
}

if date -D '%s' -d "$(date '+%s')" 2>&1 | grep -qE "bad date|invalid option"; then
    find_busybox && date() { $BUSYBOX date "$@"; } || die "date broken"
fi

if { ! command -v wget >/dev/null 2>&1 || grep -q "wget-curl" "$(command -v wget 2>/dev/null)"; }; then
    find_busybox && wget() { $BUSYBOX wget "$@"; } || die "wget not found, install busybox"
fi

if echo -e "A\nB" | grep -q "A.*B"; then
    find_busybox || die "grep broken"
    grep() { $BUSYBOX grep "$@"; }
fi

set_random_beta() {
    if [ "$(echo "$MODEL_LIST" | wc -l)" -ne "$(echo "$PRODUCT_LIST" | wc -l)" ]; then
        die "MODEL_LIST and PRODUCT_LIST have different lengths."
    fi
    count=$(echo "$MODEL_LIST" | wc -l)
    rand_index=$(( $$ % count ))
    MODEL=$(echo "$MODEL_LIST" | sed -n "$((rand_index + 1))p")
    PRODUCT=$(echo "$PRODUCT_LIST" | sed -n "$((rand_index + 1))p")
    DEVICE=$(echo "$PRODUCT" | sed 's/_beta//')
}

DIR="$MODPATH/autopif"
mkdir -p "$DIR"
cd "$DIR"

wget -q -O PIXEL_GSI_HTML --no-check-certificate https://developer.android.com/topic/generic-system-image/releases || exit 1
grep -m1 -o 'li>.*(Beta)' PIXEL_GSI_HTML | cut -d\> -f2

BETA_REL_DATE="$(date -D '%B %e, %Y' -d "$(grep -m1 -o 'Date:.*' PIXEL_GSI_HTML | cut -d' ' -f2-4)" '+%Y-%m-%d')"
BETA_EXP_DATE="$(date -D '%s' -d "$(expr $(date -D '%Y-%m-%d' -d "$BETA_REL_DATE" '+%s') + 60 \* 60 \* 24 \* 7 \* 6)" '+%Y-%m-%d')"
echo "Beta Released: $BETA_REL_DATE"
echo "Estimated Expiry: $BETA_EXP_DATE"

RELEASE="$(grep -m1 'corresponding Google Pixel builds' PIXEL_GSI_HTML | grep -o '/versions/.*' | cut -d/ -f3)"
ID="$(grep -m1 -o 'Build:.*' PIXEL_GSI_HTML | cut -d' ' -f2)"
INCREMENTAL="$(grep -m1 -o "$ID-.*-" PIXEL_GSI_HTML | cut -d- -f2)"

wget -q -O PIXEL_GET_HTML --no-check-certificate https://developer.android.com$(grep -m1 'corresponding Google Pixel builds' PIXEL_GSI_HTML | grep -o 'href.*' | cut -d\" -f2) || exit 1
wget -q -O PIXEL_BETA_HTML --no-check-certificate https://developer.android.com$(grep -m1 'Factory images for Google Pixel' PIXEL_GET_HTML | grep -o 'href.*' | cut -d\" -f2) || exit 1

MODEL_LIST="$(grep -A1 'tr id=' PIXEL_BETA_HTML | grep 'td' | sed 's;.*<td>\(.*\)</td>;\1;')"
PRODUCT_LIST="$(grep -o 'factory/.*_beta' PIXEL_BETA_HTML | cut -d/ -f2)"

wget -q -O PIXEL_SECBULL_HTML --no-check-certificate https://source.android.com/docs/security/bulletin/pixel || exit 1

SECURITY_PATCH="$(grep -A15 "$(grep -m1 -o 'Security patch level:.*' PIXEL_GSI_HTML | cut -d' ' -f4-)" PIXEL_SECBULL_HTML | grep -m1 -B1 '</tr>' | grep 'td' | sed 's;.*<td>\(.*\)</td>;\1;')"

echo "- Selecting Pixel Beta device ..."
[ -z "$PRODUCT" ] && set_random_beta
echo "$MODEL ($PRODUCT)"

sdk_version="$(getprop ro.build.version.sdk)"
sdk_version="${sdk_version:-25}"
echo "Device SDK version: $sdk_version"

echo "- Dumping values to pif.json ..."
cat <<EOF | tee pif.json
{
  "FINGERPRINT": "google/$PRODUCT/$DEVICE:$RELEASE/$ID/$INCREMENTAL:user/release-keys",
  "MANUFACTURER": "Google",
  "MODEL": "$MODEL",
  "SECURITY_PATCH": "$SECURITY_PATCH",
  "DEVICE_INITIAL_SDK_INT": $sdk_version
}
EOF

cp "$DIR/pif.json" "/data/adb/pif.json"
echo "- new pif.json saved to /data/adb/pif.json"

cd "$MODPATH"

echo "- Cleaning up ..."
rm -rf "$DIR"

su -c killall com.google.android.gms.unstable || echo ""