#!/bin/bash

# ==============================================================================
# Garmin Overlay Render Script for macOS (M4 Pro Optimized)
# Usage: ./render.sh <PATH_TO_FIT_FILE> <PATH_TO_VIDEO_FILE>
# ==============================================================================

# 1. Validate Arguments
if [ "$#" -ne 2 ]; then
    echo "Error: Invalid number of arguments."
    echo "Usage: ./render.sh <FIT_FILE> <VIDEO_FILE>"
    echo "Example: ./render.sh activity.fit footage.mp4"
    exit 1
fi

# 2. Define Variables
FIT_FILE="$1"
VIDEO_FILE="$2"

# Extract filename without extension to auto-generate output name
BASENAME=$(basename "$VIDEO_FILE")
FILENAME="${BASENAME%.*}"
# Output format is .mov because we are using H.264/ProRes containers
OUTPUT_FILE="overlay_${FILENAME}.mov"

# 3. Check and Activate Virtual Environment
# This assumes the script is run from the project root where 'venv' exists
if [ -d "venv" ]; then
    source venv/bin/activate
else
    echo "Error: 'venv' directory not found. Please run this script from the project root."
    exit 1
fi

# 4. Check for Dependencies
if [ ! -f "pro_layout.xml" ] || [ ! -f "ffmpeg-profiles.json" ]; then
    echo "Error: Configuration files (pro_layout.xml or ffmpeg-profiles.json) are missing."
    exit 1
fi

echo "================================================================"
echo "Starting Render Process"
echo "================================================================"
echo "FIT Data    : $FIT_FILE"
echo "Video Input : $VIDEO_FILE"
echo "Output File : $OUTPUT_FILE"
echo "Profile     : m4-youtube (Hardware Accelerated H.264)"
echo "Layout      : pro_layout.xml"
echo "Timestamp   : $(date)"
echo "================================================================"

# 5. Execute gopro-dashboard.py
# Using --use-gpx-only to ignore GoPro metadata and force external FIT data
gopro-dashboard.py \
    --use-gpx-only \
    --gpx "$FIT_FILE" \
    --layout xml \
    --layout-xml pro_layout.xml \
    --overlay-size 3840x2160 \
    --units-speed kph \
    --units-altitude meter \
    --font "Roboto-Medium.ttf" \
    --config-dir . \
    --profile m4-youtube \
    "$VIDEO_FILE" "$OUTPUT_FILE"

# 6. Completion
if [ $? -eq 0 ]; then
    echo "================================================================"
    echo "SUCCESS: Render finished. Output saved to: $OUTPUT_FILE"
    echo "================================================================"
else
    echo "================================================================"
    echo "FAILURE: An error occurred during rendering."
    echo "================================================================"
fi