#!/usr/bin/env bash

set -Eeuo pipefail

SCRIPT_DIR="$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)"
# shellcheck source=install_common.sh
source "$SCRIPT_DIR/install_common.sh"

readonly STAGING_DIR="${STAGING_DIR:-$SCRIPT_DIR/tmp}"
readonly POSTGRES_ROOT="${POSTGRES_ROOT:-/app/postgres/rdbms}"

if [[ "${1:-}" == "--help" || "${1:-}" == "-h" ]]; then
  show_help "$0" "Build and install PostgreSQL's auto_explain module."
  exit 0
fi

POSTGRES_VERSION="$(parse_postgresql_version "$@")"
readonly POSTGRES_VERSION
require_tools curl tar make
readonly PREFIX="${PREFIX:-$POSTGRES_ROOT/$POSTGRES_VERSION}"
readonly PG_CONFIG="$PREFIX/bin/pg_config"
require_postgresql_installation "$PREFIX"
reset_staging_dir "$STAGING_DIR"

printf 'Building auto_explain from PostgreSQL %s\n' "$POSTGRES_VERSION"
readonly POSTGRES_ARCHIVE="$STAGING_DIR/postgresql-$POSTGRES_VERSION.tar.gz"
readonly POSTGRES_SOURCE="$STAGING_DIR/postgresql-$POSTGRES_VERSION"
curl -fL --retry 3 --retry-delay 2 \
  -o "$POSTGRES_ARCHIVE" \
  "https://ftp.postgresql.org/pub/source/v$POSTGRES_VERSION/postgresql-$POSTGRES_VERSION.tar.gz"
tar -xzf "$POSTGRES_ARCHIVE" -C "$STAGING_DIR"

readonly AUTO_EXPLAIN_SOURCE="$POSTGRES_SOURCE/contrib/auto_explain"
make -C "$AUTO_EXPLAIN_SOURCE" \
  -j"${JOBS:-$(nproc)}" USE_PGXS=1 PG_CONFIG="$PG_CONFIG"
make -C "$AUTO_EXPLAIN_SOURCE" \
  install USE_PGXS=1 PG_CONFIG="$PG_CONFIG"
test -f "$PREFIX/lib/auto_explain.so"

readonly SAVED_SOURCE_DIR="$(copy_install_source "$AUTO_EXPLAIN_SOURCE" "$PREFIX" "auto_explain-$POSTGRES_VERSION")"
write_install_recipe "$SAVED_SOURCE_DIR" "$POSTGRES_VERSION" "$PREFIX" <<'RECIPE'
cd "$SCRIPT_DIR"

# Configure
# auto_explain uses PGXS directly and does not require a separate configure step.

# Make
make -j"$JOBS" USE_PGXS=1 PG_CONFIG="$PG_CONFIG"

# Make install
make install USE_PGXS=1 PG_CONFIG="$PG_CONFIG"
RECIPE