#!/bin/bash
# postinst for smartbotic-database (server)
set -e

CONFIG_FILE="/etc/smartbotic-database/config.json"
DATA_DIR="/var/lib/smartbotic-database"

case "$1" in
    configure)
        if ! getent group smartbotic-db >/dev/null 2>&1; then
            addgroup --system smartbotic-db
        fi
        if ! getent passwd smartbotic-db >/dev/null 2>&1; then
            adduser --system --ingroup smartbotic-db --home "$DATA_DIR" \
                --shell /usr/sbin/nologin --gecos "Smartbotic Database Service" smartbotic-db
        fi

        install -d -o smartbotic-db -g smartbotic-db -m 0750 "$DATA_DIR"
        install -d -o root -g smartbotic-db -m 0750 /etc/smartbotic-database
        # v1.7.0: drop-in config directory. *.json files here are merged
        # lexicographically into /etc/smartbotic-database/config.json at
        # service start (RFC 7396 merge_patch semantics).
        install -d -o root -g smartbotic-db -m 0755 /etc/smartbotic-database/conf.d

        # ── Migration from shadowman-database ──
        OLD_SM_DATA="/var/lib/shadowman/data/database"
        OLD_SM_CONFIG="/etc/shadowman/database.json"
        if [ -d "$OLD_SM_DATA" ] && [ "$(ls -A "$OLD_SM_DATA" 2>/dev/null)" ] && \
           [ ! "$(ls -A "$DATA_DIR" 2>/dev/null)" ]; then
            echo "smartbotic-database: migrating data from shadowman-database..."
            cp -a "$OLD_SM_DATA"/. "$DATA_DIR"/
            chown -R smartbotic-db:smartbotic-db "$DATA_DIR"
        fi
        if [ -f "$OLD_SM_CONFIG" ] && [ ! -f "$CONFIG_FILE" ]; then
            cp "$OLD_SM_CONFIG" "$CONFIG_FILE"
            sed -i 's|/var/lib/shadowman/data/database|/var/lib/smartbotic-database|g' "$CONFIG_FILE"
            sed -i 's|/var/lib/shadowman/data/storage\.key|/var/lib/smartbotic-database/storage.key|g' "$CONFIG_FILE"
        fi

        # ── Migration from callerai-storage ──
        OLD_CA_DATA="/var/lib/callerai/storage"
        OLD_CA_CONFIG="/etc/callerai/storage.json"
        if [ -d "$OLD_CA_DATA" ] && [ "$(ls -A "$OLD_CA_DATA" 2>/dev/null)" ] && \
           [ ! "$(ls -A "$DATA_DIR" 2>/dev/null)" ]; then
            echo "smartbotic-database: migrating data from callerai-storage..."
            cp -a "$OLD_CA_DATA"/. "$DATA_DIR"/
            chown -R smartbotic-db:smartbotic-db "$DATA_DIR"
        fi
        if [ -f "$OLD_CA_CONFIG" ] && [ ! -f "$CONFIG_FILE" ]; then
            cp "$OLD_CA_CONFIG" "$CONFIG_FILE"
            sed -i 's|/var/lib/callerai/storage|/var/lib/smartbotic-database|g' "$CONFIG_FILE"
        fi

        if [ -f "$CONFIG_FILE" ]; then
            chown root:smartbotic-db "$CONFIG_FILE"
            chmod 640 "$CONFIG_FILE"
        fi

        systemctl daemon-reload || true
        if [ -z "$2" ]; then
            systemctl enable smartbotic-database.service || true
            systemctl start smartbotic-database.service || true
        else
            systemctl reset-failed smartbotic-database.service 2>/dev/null || true
            systemctl restart smartbotic-database.service || true
        fi
        ;;
    abort-upgrade|abort-remove|abort-deconfigure) ;;
    *) echo "postinst called with unknown argument '$1'" >&2; exit 1 ;;
esac
exit 0