#!/bin/bash

# MongoDB Version Manager
# Helps manage MongoDB server binaries for different versions (3-8)
# This script provides utilities for adding and managing MongoDB server versions

# Source settings
source $SNAP/bin/wekan-read-settings

# MongoDB version information
declare -A MONGO_VERSIONS=(
    ["3"]="3.2.22"
    ["4"]="4.4.28"
    ["5"]="5.0.28"
    ["6"]="6.0.15"
    ["7"]="7.0.25"
    ["8"]="8.0.4"
)

# MongoDB binary paths
declare -A MONGO_PATHS=(
    ["3"]="/snap/${SNAP_NAME}/current/migratemongo/bin"
    ["4"]="/snap/${SNAP_NAME}/current/mongodb4/bin"
    ["5"]="/snap/${SNAP_NAME}/current/mongodb5/bin"
    ["6"]="/snap/${SNAP_NAME}/current/mongodb6/bin"
    ["7"]="/snap/${SNAP_NAME}/current/bin"
    ["8"]="/snap/${SNAP_NAME}/current/mongodb8/bin"
)

# Check which MongoDB versions are available
check_available_versions() {
    echo "=== Available MongoDB Server Versions ==="
    for version in "${!MONGO_VERSIONS[@]}"; do
        local path="${MONGO_PATHS[$version]}"
        if [ -f "$path/mongod" ]; then
            echo "✓ MongoDB $version.x (${MONGO_VERSIONS[$version]}) - Available at $path"
        else
            echo "✗ MongoDB $version.x (${MONGO_VERSIONS[$version]}) - Not available at $path"
        fi
    done
    echo ""
}

# Check which MongoDB Node.js drivers are available
check_available_drivers() {
    echo "=== Available MongoDB Node.js Drivers ==="
    if [ -f "/home/wekan/repos/wekan/package.json" ]; then
        for version in "${!MONGO_VERSIONS[@]}"; do
            if grep -q "mongodb${version}legacy" "/home/wekan/repos/wekan/package.json"; then
                echo "✓ MongoDB $version.x Node.js driver - Available (mongodb${version}legacy)"
            else
                echo "✗ MongoDB $version.x Node.js driver - Not available"
            fi
        done
    else
        echo "package.json not found"
    fi
    echo ""
}

# Show current active MongoDB version
show_active_version() {
    if [ -f "${SNAP_COMMON}/mongodb-active-version" ]; then
        local active_version=$(cat "${SNAP_COMMON}/mongodb-active-version")
        echo "=== Current Active MongoDB Version ==="
        echo "Active Version: MongoDB $active_version.x"
        echo "Version File: ${SNAP_COMMON}/mongodb-active-version"
        echo ""
    else
        echo "=== Current Active MongoDB Version ==="
        echo "No active version file found (will use default MongoDB 7.x)"
        echo ""
    fi
}

# Show version detection log
show_detection_log() {
    if [ -f "${SNAP_COMMON}/mongodb-version-detection.log" ]; then
        echo "=== MongoDB Version Detection Log ==="
        tail -20 "${SNAP_COMMON}/mongodb-version-detection.log"
        echo ""
    else
        echo "=== MongoDB Version Detection Log ==="
        echo "No detection log found"
        echo ""
    fi
}

# Force version detection
force_detection() {
    echo "=== Forcing MongoDB Version Detection ==="
    rm -f "${SNAP_COMMON}/mongodb-active-version"
    echo "Cleared cached version. Next MongoDB restart will detect version automatically."
    echo ""
}

# Show help
show_help() {
    echo "MongoDB Version Manager"
    echo ""
    echo "Usage: $0 [command]"
    echo ""
    echo "Commands:"
    echo "  versions     - Show available MongoDB server versions"
    echo "  drivers      - Show available MongoDB Node.js drivers"
    echo "  active       - Show current active MongoDB version"
    echo "  log          - Show version detection log"
    echo "  detect       - Force version detection on next restart"
    echo "  help         - Show this help message"
    echo ""
    echo "Examples:"
    echo "  $0 versions    # Check which MongoDB versions are available"
    echo "  $0 active      # Show which version is currently active"
    echo "  $0 detect      # Force re-detection on next restart"
    echo ""
}

# Main command handling
case "${1:-help}" in
    "versions")
        check_available_versions
        ;;
    "drivers")
        check_available_drivers
        ;;
    "active")
        show_active_version
        ;;
    "log")
        show_detection_log
        ;;
    "detect")
        force_detection
        ;;
    "help"|*)
        show_help
        ;;
esac