#!/bin/bash

# Install script for DEP dsoundcard ALSA plugin
# This sets up the dsoundcard plugin to access DEP audio via ALSA

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
DSOUNDCARD_SO="$SCRIPT_DIR/dep_examples-1.2.2.1_aarch64_Linux/dep_examples/apps/dsoundcard.so"
ASOUNDRC_SRC="$SCRIPT_DIR/asoundrc.dsoundcard"
INSTALL_DIR="/opt/dep"

echo "=========================================="
echo "DEP dsoundcard ALSA Plugin Installer"
echo "=========================================="
echo ""

# Check if running as root for /opt/dep installation
if [ "$EUID" -ne 0 ]; then
    echo "This script requires root privileges to install to $INSTALL_DIR"
    echo "Please run with: sudo bash $0"
    exit 1
fi

# Check if dsoundcard.so exists
if [ ! -f "$DSOUNDCARD_SO" ]; then
    echo "ERROR: dsoundcard.so not found at:"
    echo "  $DSOUNDCARD_SO"
    echo ""
    echo "Make sure the DEP examples package is extracted in the project directory."
    exit 1
fi

# Check if asoundrc config exists
if [ ! -f "$ASOUNDRC_SRC" ]; then
    echo "ERROR: asoundrc.dsoundcard not found at:"
    echo "  $ASOUNDRC_SRC"
    exit 1
fi

echo "1. Creating installation directory..."
mkdir -p "$INSTALL_DIR"
echo "   Created: $INSTALL_DIR"
echo ""

echo "2. Installing dsoundcard.so..."
cp "$DSOUNDCARD_SO" "$INSTALL_DIR/"
chmod 644 "$INSTALL_DIR/dsoundcard.so"
echo "   Installed: $INSTALL_DIR/dsoundcard.so"
echo ""

echo "3. Configuring ALSA..."
# Get the actual user (not root when using sudo)
ACTUAL_USER="${SUDO_USER:-$USER}"
ACTUAL_HOME=$(getent passwd "$ACTUAL_USER" | cut -d: -f6)

if [ -f "$ACTUAL_HOME/.asoundrc" ]; then
    # Check if dsoundcard is already configured
    if grep -q "dsoundcard" "$ACTUAL_HOME/.asoundrc"; then
        echo "   dsoundcard already configured in $ACTUAL_HOME/.asoundrc"
    else
        echo "   Backing up existing .asoundrc..."
        cp "$ACTUAL_HOME/.asoundrc" "$ACTUAL_HOME/.asoundrc.backup.$(date +%Y%m%d_%H%M%S)"
        echo "   Appending dsoundcard configuration..."
        echo "" >> "$ACTUAL_HOME/.asoundrc"
        cat "$ASOUNDRC_SRC" >> "$ACTUAL_HOME/.asoundrc"
    fi
else
    echo "   Creating $ACTUAL_HOME/.asoundrc..."
    cp "$ASOUNDRC_SRC" "$ACTUAL_HOME/.asoundrc"
    chown "$ACTUAL_USER:$ACTUAL_USER" "$ACTUAL_HOME/.asoundrc"
fi
echo "   ALSA configuration updated"
echo ""

echo "4. Verifying installation..."
# Switch to actual user to test ALSA
if su - "$ACTUAL_USER" -c "aplay -L 2>/dev/null | grep -q dsoundcard"; then
    echo "   ✓ dsoundcard device is available in ALSA"
else
    echo "   ⚠ dsoundcard device not detected (may need to restart audio services)"
fi
echo ""

echo "=========================================="
echo "Installation complete!"
echo "=========================================="
echo ""
echo "Usage:"
echo "  # Record from DEP (6 channels, 16-bit, 48kHz)"
echo "  arecord -D dsoundcard -c 6 -f S16_LE -r 48000 output.wav"
echo ""
echo "  # Play to DEP (requires txChannels > 0 in dante.json)"
echo "  aplay -D dsoundcard -f S16_LE -r 48000 input.wav"
echo ""
echo "  # Use the test script"
echo "  bash $SCRIPT_DIR/test_dsoundcard.sh"
echo ""
echo "Note: DEP must be running before using dsoundcard."
echo "      Start DEP with: sudo bash $SCRIPT_DIR/dep.sh start"
echo ""