#!/usr/bin/env bash
set -euo pipefail

ROOT="$(cd "$(dirname "$0")/../.." && pwd)"
STATE="$ROOT/.yrxtls-ios-target"

case "$(uname -s)" in
    Darwin) ;;
    *) echo "select-ios only works on macOS" >&2; exit 1;;
esac

ENTRIES=()

while IFS= read -r line; do
    line="${line%"${line##*[![:space:]]}"}"
    udid=$(echo "$line" | grep -oE '[A-F0-9-]{36}' | head -1)
    [ -z "$udid" ] && continue
    name=$(echo "$line" | awk -F'   +' '{print $1}')
    model=$(echo "$line" | awk -F'   +' '{print $5}')
    ENTRIES+=("device|$udid|$name ($model)")
done < <(xcrun devicectl list devices 2>/dev/null | grep "available (paired)")

declare -A SEEN_SIMS
runtime_re='^-- (.*) --$'
sim_re='^[[:space:]]+(.*)[[:space:]]\(([A-F0-9-]{36})\)[[:space:]]\(([^)]+)\)'
while IFS= read -r line; do
    if [[ "$line" =~ $runtime_re ]]; then
        runtime="${BASH_REMATCH[1]}"
        continue
    fi
    if [[ "$line" =~ $sim_re ]]; then
        name="${BASH_REMATCH[1]}"
        udid="${BASH_REMATCH[2]}"
        [ -n "${SEEN_SIMS[$name]:-}" ] && continue
        SEEN_SIMS[$name]=1
        ENTRIES+=("sim|$udid|$name  ($runtime)")
    fi
done < <(xcrun simctl list devices available 2>/dev/null)

if [ ${#ENTRIES[@]} -eq 0 ]; then
    echo "no devices or simulators found" >&2
    exit 1
fi

echo "Pick an iOS target (saved to .yrxtls-ios-target):"
echo
i=1
for e in "${ENTRIES[@]}"; do
    kind="${e%%|*}"
    rest="${e#*|}"
    udid="${rest%%|*}"
    label="${rest#*|}"
    case "$kind" in
        device) tag="📱 device" ;;
        sim)    tag="🖥️  sim   " ;;
    esac
    printf "  %2d) %s  %s\n" "$i" "$tag" "$label"
    i=$((i+1))
done
echo "   0) clear selection (auto-pick)"
echo

read -r -p "> " choice

if [ "$choice" = "0" ]; then
    rm -f "$STATE"
    echo "selection cleared, scripts will auto-pick again."
    exit 0
fi

if ! [[ "$choice" =~ ^[0-9]+$ ]] || [ "$choice" -lt 1 ] || [ "$choice" -gt ${#ENTRIES[@]} ]; then
    echo "not a valid choice" >&2
    exit 1
fi

picked="${ENTRIES[$((choice-1))]}"
KIND="${picked%%|*}"
rest="${picked#*|}"
UDID="${rest%%|*}"
LABEL="${rest#*|}"

cat > "$STATE" <<EOF
YRXTALS_IOS_KIND=$KIND
YRXTALS_IOS_UDID=$UDID
YRXTALS_IOS_LABEL="$LABEL"
EOF

echo
echo "saved: $KIND $UDID"
echo "label: $LABEL"
echo
echo "next: cargo xtask debug-ios   (kind no longer needs to be passed)"