#!/bin/bash
set -e

# Function to build the command based on environment variables
build_command() {
    local cmd="/usr/local/bin/python3 /app/update_channel_logos.py"

    # Required parameters
    cmd="$cmd --server \"$EMBY_SERVER_URL\""
    cmd="$cmd --api-key \"$EMBY_API_KEY\""

    # Handle --list-tags mode (takes precedence)
    if [ "${LIST_TAGS:-false}" = "true" ]; then
        cmd="$cmd --list-tags"
        echo "$cmd"
        return
    fi

    # Handle --debug-tags mode (takes precedence)
    if [ "${DEBUG_TAGS:-false}" = "true" ]; then
        cmd="$cmd --debug-tags"
        echo "$cmd"
        return
    fi

    # Optional parameters
    if [ "${MODE:-copy}" = "clear" ]; then
        cmd="$cmd --clear"
    fi

    if [ "${DRY_RUN:-true}" != "true" ]; then
        cmd="$cmd --execute"
    fi

    if [ "${FIRST_ONLY:-false}" = "true" ]; then
        cmd="$cmd --first-only"
    fi

    if [ "${FORCE:-false}" = "true" ] && [ "${MODE:-copy}" = "copy" ]; then
        cmd="$cmd --force"
    fi

    # Add tags if specified
    if [ -n "${TAGS:-}" ]; then
        cmd="$cmd --tags \"$TAGS\""
    fi

    # Add non-interactive flag
    cmd="$cmd --non-interactive"

    echo "$cmd"
}

# Validate required environment variables
if [ -z "$EMBY_SERVER_URL" ]; then
    echo "ERROR: EMBY_SERVER_URL environment variable is required"
    exit 1
fi

if [ -z "$EMBY_API_KEY" ]; then
    echo "ERROR: EMBY_API_KEY environment variable is required"
    exit 1
fi

# Get the cron schedule (default: daily at 3 AM)
CRON_SCHEDULE="${CRON_SCHEDULE:-0 3 * * *}"

# Build the command
COMMAND=$(build_command)

# Log the configuration
echo "=========================================="
echo "Emby TV Logo Tools - Docker Container"
echo "=========================================="
echo "Emby Server: $EMBY_SERVER_URL"
echo "Mode: ${MODE:-copy}"
echo "Dry Run: ${DRY_RUN:-true}"
echo "First Only: ${FIRST_ONLY:-false}"
echo "Force: ${FORCE:-false}"
echo "Tags: ${TAGS:-(none)}"
echo "Cron Schedule: $CRON_SCHEDULE"
echo "Timezone: ${TZ:-UTC}"
echo "=========================================="
echo ""

# If RUN_ONCE is set, just run the command once and exit
if [ "${RUN_ONCE:-false}" = "true" ]; then
    echo "Running once (RUN_ONCE=true)..."
    eval "$COMMAND"
    exit 0
fi

# Create cron job
echo "Setting up cron job..."
echo "$CRON_SCHEDULE $COMMAND >> /var/log/cron.log 2>&1" > /etc/cron.d/emby-logo-update

# Give execution rights on the cron job
chmod 0644 /etc/cron.d/emby-logo-update

# Create the log file
touch /var/log/cron.log

# Apply cron job
crontab /etc/cron.d/emby-logo-update

# Print next scheduled run times
echo ""
echo "Cron job installed. Schedule: $CRON_SCHEDULE"
echo "=========================================="
echo ""
echo "Starting cron daemon..."
echo "Container is running. Logs will appear below."
echo ""

# Start cron in foreground and tail the log
cron && tail -f /var/log/cron.log