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

REPO_ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/../.." && pwd)"
LAB_ROOT="${AZEROTHAI_PLAYABLE_ROOT:-$HOME/azerothai-pc-lab}"
ACORE_ROOT="$LAB_ROOT/azerothcore"
RUNTIME_ENV="$LAB_ROOT/runtime.env"
OUT_DIR="${1:-$HOME}"
STAMP="$(date +%Y%m%d-%H%M%S)"
WORK="$LAB_ROOT/export-$STAMP"
ARCHIVE="$OUT_DIR/azerothai-pc-lab-$STAMP.tar.gz"

mkdir -p "$WORK/mysql" "$WORK/azerothai"

if [[ ! -f "$RUNTIME_ENV" ]]; then
 echo "Missing $RUNTIME_ENV. This does not look like an initialized PC lab." >&2
 exit 2
fi

# shellcheck disable=SC1090
source "$RUNTIME_ENV"
: "${DOCKER_DB_ROOT_PASSWORD:?Missing database password in runtime.env}"

if ! docker inspect ac-database >/dev/null 2>&1; then
 echo "The AzerothCore database container is not present." >&2
 exit 3
fi

echo "==> Dumping AzerothCore databases"
for db in acore_auth acore_characters acore_world; do
 docker exec ac-database mysqldump   -uroot -p"$DOCKER_DB_ROOT_PASSWORD"   --single-transaction --routines --events --triggers "$db"   > "$WORK/mysql/$db.sql"
done

echo "==> Preserving AzerothAI state and runtime configuration"
cp "$RUNTIME_ENV" "$WORK/runtime.env"
chmod 600 "$WORK/runtime.env"

if [[ -d "$REPO_ROOT/.wrangler/state" ]]; then
 tar -C "$REPO_ROOT" -czf "$WORK/azerothai/wrangler-state.tar.gz" .wrangler/state
fi

if [[ -d "$LAB_ROOT/etc" ]]; then
 tar -C "$LAB_ROOT" -czf "$WORK/azerothcore-etc.tar.gz" etc
fi

cat > "$WORK/MANIFEST.txt" <<EOF
AzerothAI temporary PC lab migration export
Created: $(date -Is)
Source branch: $(git -C "$REPO_ROOT" rev-parse --abbrev-ref HEAD 2>/dev/null || echo unknown)
Source commit: $(git -C "$REPO_ROOT" rev-parse HEAD 2>/dev/null || echo unknown)

Contains:
- acore_auth SQL
- acore_characters SQL
- acore_world SQL
- AzerothAI local D1/SQLite state, when present
- AzerothCore generated configuration, when present
- runtime.env including bridge/operator/database secrets

Treat this archive as sensitive because it contains credentials.
EOF

echo "==> Creating migration archive"
tar -C "$WORK" -czf "$ARCHIVE" .
chmod 600 "$ARCHIVE"
rm -rf "$WORK"

echo
echo "Migration export created:"
echo "  $ARCHIVE"
echo
echo "Keep this file private. It contains realm data and runtime credentials."