#!/bin/bash

# Function to read configuration using bashio
read_config() {
    if command -v bashio >/dev/null 2>&1; then
        bashio::config "$1"
    else
        # Fallback for testing
        case "$1" in
            "node_role") echo "master" ;;
            "cluster_name") echo "hass-opensearch-cluster" ;;
            "node_name") echo "os-master" ;;
            "heap_size") echo "1g" ;;
            "http_port") echo "9200" ;;
            "transport_port") echo "9300" ;;
            "discovery_seed_hosts") echo '["os-master:9300"]' ;;
            "initial_master_nodes") echo '["os-master"]' ;;
            "security_enabled") echo "false" ;;
            "admin_password") echo "SecurePass123!" ;;
            "plugins") echo "[]" ;;
            *) echo "" ;;
        esac
    fi
}

# Read configuration
NODE_ROLE=$(read_config 'node_role' | tr -d '[]"' | tr ',' ' ')
CLUSTER_NAME=$(read_config 'cluster_name')
NODE_NAME=$(read_config 'node_name')
HEAP_SIZE=$(read_config 'heap_size')
HTTP_PORT=$(read_config 'http_port')
TRANSPORT_PORT=$(read_config 'transport_port')
DISCOVERY_SEEDS=$(read_config 'discovery_seed_hosts' | tr -d '[]"' | tr ',' ' ')
INITIAL_MASTERS=$(read_config 'initial_master_nodes' | tr -d '[]"' | tr ',' ' ')
SECURITY_ENABLED=$(read_config 'security_enabled')
ADMIN_PASSWORD=$(read_config 'admin_password')

# Set heap size
export OPENSEARCH_JAVA_OPTS="-Xms${HEAP_SIZE} -Xmx${HEAP_SIZE}"
export OPENSEARCH_HEAP_SIZE="${HEAP_SIZE}"

# Set admin password
export OPENSEARCH_INITIAL_ADMIN_PASSWORD="${ADMIN_PASSWORD}"

# Export variables for envsubst
export CLUSTER_NAME="${CLUSTER_NAME:-hass-opensearch-cluster}"
export NODE_NAME="${NODE_NAME:-os-master}"
export NODE_ROLE="${NODE_ROLE:-master}"
export HTTP_PORT="${HTTP_PORT:-9200}"
export TRANSPORT_PORT="${TRANSPORT_PORT:-9300}"
export DISCOVERY_SEEDS="${DISCOVERY_SEEDS:-os-master:9300}"
export INITIAL_MASTERS="${INITIAL_MASTERS:-os-master}"
export SECURITY_ENABLED="${SECURITY_ENABLED:-false}"

# Generate configuration from template
envsubst < /etc/opensearch/opensearch.yml.template > /usr/share/opensearch/config/opensearch.yml

# Install plugins if specified
PLUGINS_JSON=$(read_config 'plugins')
if [ -n "$PLUGINS_JSON" ] && [ "$PLUGINS_JSON" != "[]" ]; then
    PLUGINS=$(echo "$PLUGINS_JSON" | jq -r '.[]' 2>/dev/null || echo "")
    for plugin in $PLUGINS; do
        echo "Installing plugin: $plugin"
        /usr/share/opensearch/bin/opensearch-plugin install --batch "$plugin" || true
    done
fi

# Set vm.max_map_count if possible
if [ -w /proc/sys/vm/max_map_count ]; then
    echo 262144 > /proc/sys/vm/max_map_count
fi

# Start OpenSearch as opensearch user
exec su-exec opensearch /usr/share/opensearch/bin/opensearch