#!/bin/bash
# generate-log-config.sh - Generate log-level environment variables
# Maps a single LOG_LEVEL to per-container settings and writes to stdout
#
# Usage: ./generate-log-config.sh [LOG_LEVEL]
#   LOG_LEVEL: DEBUG, INFO, WARN, or ERROR (default: INFO)
#
# Output: Log configuration variables on stdout (append to .env)
#   Example: ./generate-log-config.sh INFO >> .env
#
# Exit codes:
#   0 - Configuration generated successfully
#   1 - Invalid LOG_LEVEL provided

set -euo pipefail

LOG_LEVEL="${1:-INFO}"

# Validate input
case "$LOG_LEVEL" in
  DEBUG|INFO|WARN|ERROR) ;;
  *)
    echo "Error: Invalid LOG_LEVEL '$LOG_LEVEL'. Must be DEBUG, INFO, WARN, or ERROR." >&2
    exit 1
    ;;
esac

# Convert to lowercase for services that need it
LOG_LEVEL_LOWER=$(echo "$LOG_LEVEL" | tr '[:upper:]' '[:lower:]')

# Map PostgreSQL log settings based on level
case "$LOG_LEVEL" in
  DEBUG) POSTGRES_LOG_STATEMENT="all"; POSTGRES_LOG_MIN_DURATION="0" ;;
  INFO)  POSTGRES_LOG_STATEMENT="ddl"; POSTGRES_LOG_MIN_DURATION="500" ;;
  WARN)  POSTGRES_LOG_STATEMENT="none"; POSTGRES_LOG_MIN_DURATION="1000" ;;
  ERROR) POSTGRES_LOG_STATEMENT="none"; POSTGRES_LOG_MIN_DURATION="-1" ;;
esac

# Map Redis log level
case "$LOG_LEVEL" in
  DEBUG) REDIS_LOGLEVEL="debug" ;;
  INFO)  REDIS_LOGLEVEL="verbose" ;;
  WARN)  REDIS_LOGLEVEL="notice" ;;
  ERROR) REDIS_LOGLEVEL="warning" ;;
esac

# Output log configuration to stdout
cat << EOF

# Log levels (generated by generate-log-config.sh $LOG_LEVEL)
BACKEND_LOG_LEVEL=$LOG_LEVEL_LOWER
TRAEFIK_LOG_LEVEL=$LOG_LEVEL
POSTGRES_LOG_STATEMENT=$POSTGRES_LOG_STATEMENT
POSTGRES_LOG_MIN_DURATION=$POSTGRES_LOG_MIN_DURATION
REDIS_LOGLEVEL=$REDIS_LOGLEVEL
EOF