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wekan
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							#!/bin/bash

# MongoDB Migration Script from version 3 to 7
# This script handles migration with disk space checks, progress tracking, and error handling
#
# IMPORTANT: Migration is only triggered when MIGRATE_MONGODB=true environment variable is set
# IMPORTANT: All operations are contained within SNAP_COMMON directory
# IMPORTANT: No snap settings or channel changes are made during migration
# This is the only writable directory in a snap environment

set -e

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

# Migration configuration
MIGRATION_LOG="${SNAP_COMMON}/mongodb-migration-log.txt"
MIGRATION_STATUS="${SNAP_COMMON}/mongodb-migration-status.json"
MIGRATION_PROGRESS="${SNAP_COMMON}/mongodb-migration-progress.html"
REVERT_FILE="${SNAP_COMMON}/revert-mongodb-migration.txt"
TEMP_DIR="${SNAP_COMMON}/mongodb-migration-temp"
BACKUP_DIR="${SNAP_COMMON}/mongodb-backup-$(date +%Y%m%d-%H%M%S)"

# MongoDB paths
MONGO3_BIN="/snap/${SNAP_NAME}/current/migratemongo/bin"
MONGO7_BIN="/snap/${SNAP_NAME}/current/bin"
MONGO3_LIB="/snap/${SNAP_NAME}/current/migratemongo/lib"
MONGO7_LIB="/snap/${SNAP_NAME}/current/usr/lib"

# Set up environment for MongoDB 3 tools
export LD_LIBRARY_PATH="${MONGO3_LIB}:${MONGO3_LIB}/x86_64-linux-gnu:${LD_LIBRARY_PATH}"
export PATH="${MONGO3_BIN}:${MONGO7_BIN}:${PATH}"

# Set MongoDB log destination to snapcommon for log file detection
export MONGO_LOG_DESTINATION="snapcommon"

# Validate that all operations are within SNAP_COMMON
validate_snap_common_path() {
    local path="$1"
    local description="$2"

    if [[ "$path" != "${SNAP_COMMON}"* ]]; then
        log_error "Path outside SNAP_COMMON detected: $path ($description)"
        log_error "SNAP_COMMON: $SNAP_COMMON"
        return 1
    fi
    return 0
}

# Validate all critical paths
validate_all_paths() {
    log_message "Validating all paths are within SNAP_COMMON"

    validate_snap_common_path "$MIGRATION_LOG" "Migration log" || return 1
    validate_snap_common_path "$MIGRATION_STATUS" "Migration status" || return 1
    validate_snap_common_path "$MIGRATION_PROGRESS" "Migration progress" || return 1
    validate_snap_common_path "$REVERT_FILE" "Revert file" || return 1
    validate_snap_common_path "$TEMP_DIR" "Temporary directory" || return 1
    validate_snap_common_path "$BACKUP_DIR" "Backup directory" || return 1

    log_success "All paths validated within SNAP_COMMON"
    return 0
}

# Logging functions
log_message() {
    local message="$1"
    local timestamp=$(date '+%Y-%m-%d %H:%M:%S')
    echo "[$timestamp] $message" | tee -a "$MIGRATION_LOG"
}

log_error() {
    local message="$1"
    log_message "ERROR: $message"
}

log_success() {
    local message="$1"
    log_message "SUCCESS: $message"
}

log_warning() {
    local message="$1"
    log_message "WARNING: $message"
}

# Disk space checking functions
check_disk_space() {
    local required_space_gb="$1"
    local available_space_gb=$(df "$SNAP_COMMON" | awk 'NR==2 {print int($4/1024/1024)}')

    if [ "$available_space_gb" -lt "$required_space_gb" ]; then
        log_error "Insufficient disk space. Required: ${required_space_gb}GB, Available: ${available_space_gb}GB"
        return 1
    fi

    log_message "Disk space check passed. Available: ${available_space_gb}GB, Required: ${required_space_gb}GB"
    return 0
}

# Progress tracking functions
update_progress() {
    local step="$1"
    local total_steps="$2"
    local description="$3"
    local percentage=$((step * 100 / total_steps))

    # Update JSON status file
    cat > "$MIGRATION_STATUS" << EOF
{
    "step": $step,
    "total_steps": $total_steps,
    "percentage": $percentage,
    "description": "$description",
    "timestamp": "$(date -Iseconds)",
    "status": "running"
}
EOF

    # Update HTML progress page
    cat > "$MIGRATION_PROGRESS" << EOF
<!DOCTYPE html>
<html>
<head>
    <title>MongoDB Migration Progress</title>
    <meta http-equiv="refresh" content="5">
    <style>
        body { font-family: Arial, sans-serif; margin: 40px; }
        .progress-bar { width: 100%; background-color: #f0f0f0; border-radius: 5px; }
        .progress-fill { height: 30px; background-color: #4CAF50; border-radius: 5px; width: ${percentage}%; }
        .status { margin: 20px 0; }
        .error { color: red; }
        .success { color: green; }
    </style>
</head>
<body>
    <h1>MongoDB Migration Progress</h1>
    <div class="progress-bar">
        <div class="progress-fill"></div>
    </div>
    <div class="status">
        <p><strong>Progress:</strong> $step of $total_steps steps ($percentage%)</p>
        <p><strong>Current Step:</strong> $description</p>
        <p><strong>Last Updated:</strong> $(date)</p>
    </div>
    <p><em>This page will refresh automatically every 5 seconds.</em></p>
</body>
</html>
EOF

    log_message "Progress: $step/$total_steps ($percentage%) - $description"
}

# Estimate completion time
estimate_completion_time() {
    local start_time="$1"
    local current_step="$2"
    local total_steps="$3"

    if [ "$current_step" -gt 0 ]; then
        local elapsed=$(($(date +%s) - start_time))
        local avg_time_per_step=$((elapsed / current_step))
        local remaining_steps=$((total_steps - current_step))
        local estimated_remaining=$((remaining_steps * avg_time_per_step))

        local hours=$((estimated_remaining / 3600))
        local minutes=$(((estimated_remaining % 3600) / 60))
        local seconds=$((estimated_remaining % 60))

        echo "${hours}h ${minutes}m ${seconds}s"
    else
        echo "Calculating..."
    fi
}

# Create backup before migration
create_backup() {
    log_message "Creating backup of MongoDB 3 database"

    # Check disk space for backup (estimate 2x current database size)
    local db_size=$(du -s "${SNAP_COMMON}/wekan" 2>/dev/null | awk '{print $1}' || echo "0")
    local required_space=$((db_size * 2 / 1024 / 1024 + 1)) # Convert to GB and add 1GB buffer

    if ! check_disk_space "$required_space"; then
        log_error "Insufficient disk space for backup"
        return 1
    fi

    # Create backup directory
    mkdir -p "$BACKUP_DIR"

    # Copy database files
    if [ -d "${SNAP_COMMON}/wekan" ]; then
        cp -r "${SNAP_COMMON}/wekan" "$BACKUP_DIR/"
        log_success "Database backup created at $BACKUP_DIR"
        return 0
    else
        log_error "No database found to backup"
        return 1
    fi
}

# Check if migration is needed
check_migration_needed() {
    if [ -f "$MIGRATION_STATUS" ]; then
        local status=$(jq -r '.status' "$MIGRATION_STATUS" 2>/dev/null || echo "unknown")
        if [ "$status" = "completed" ]; then
            log_message "Migration already completed"
            return 1
        elif [ "$status" = "running" ]; then
            log_message "Migration already in progress"
            return 0
        fi
    fi

    # Check if we have MongoDB 3 data (either in wekan directory or raw database files)
    if [ -d "${SNAP_COMMON}/wekan" ] && [ ! -f "${SNAP_COMMON}/mongodb-version-7" ]; then
        log_message "MongoDB 3 data detected in wekan directory"
        return 0
    fi

    # Check for MongoDB upgrade needed by examining log file
    if detect_mongodb_upgrade_needed; then
        log_message "MongoDB upgrade needed detected from log file"
        return 0
    fi

    log_message "No migration needed"
    return 1
}

# Display MongoDB log content for debugging
display_mongodb_log_content() {
    local mongodb_log="${SNAP_COMMON}/mongodb.log"
    
    if [ ! -f "$mongodb_log" ]; then
        log_message "MongoDB log file not found: $mongodb_log"
        return 1
    fi
    
    log_message "MongoDB log file content (last 50 lines):"
    if [ -r "$mongodb_log" ]; then
        tail -50 "$mongodb_log" | while read -r line; do
            log_message "LOG: $line"
        done
    else
        log_message "MongoDB log file not readable, trying with sudo"
        sudo tail -50 "$mongodb_log" 2>/dev/null | while read -r line; do
            log_message "LOG: $line"
        done
    fi
}

# Detect if MongoDB upgrade is needed by checking log file
detect_mongodb_upgrade_needed() {
    local mongodb_log="${SNAP_COMMON}/mongodb.log"
    
    # Check if MongoDB log file exists
    if [ ! -f "$mongodb_log" ]; then
        log_message "MongoDB log file not found: $mongodb_log"
        return 1
    fi
    
    # Display log content for debugging
    display_mongodb_log_content
    
    # Check file permissions and try to read with appropriate method
    if [ ! -r "$mongodb_log" ]; then
        log_message "MongoDB log file not readable, trying with sudo"
        # Try to read with sudo if not readable
        if ! sudo grep -q "too recent to start up on the existing data files" "$mongodb_log" 2>/dev/null; then
            log_message "No MongoDB upgrade needed detected in log file (via sudo)"
            return 1
        fi
    else
        # Check for various error messages that indicate upgrade is needed
        # The exact message may vary between MongoDB versions
        local upgrade_patterns=(
            "This version of MongoDB is too recent to start up on the existing data files"
            "too recent to start up on the existing data files"
            "Try MongoDB 4.2 or earlier"
            "unsupported format version"
            "data files are incompatible"
            "database files are incompatible"
            "version too new"
            "version too recent"
        )
        
        local found_upgrade_needed=false
        for pattern in "${upgrade_patterns[@]}"; do
            if grep -q "$pattern" "$mongodb_log" 2>/dev/null; then
                log_message "Found upgrade pattern in log: '$pattern'"
                found_upgrade_needed=true
                break
            fi
        done
        
        if [ "$found_upgrade_needed" = false ]; then
            log_message "No MongoDB upgrade needed detected in log file"
            return 1
        fi
    fi
    
    log_message "MongoDB upgrade needed detected in log file"
    return 0
}

# Log rotation function for MongoDB logs
rotate_mongodb_logs() {
    local mongodb_log="${SNAP_COMMON}/mongodb.log"
    local max_size_mb=100
    local keep_copies=10
    
    # Check if log file exists and is large enough to rotate
    if [ ! -f "$mongodb_log" ]; then
        log_message "MongoDB log file not found, skipping rotation"
        return 0
    fi
    
    # Get log file size in MB
    local log_size_mb=$(du -m "$mongodb_log" | cut -f1)
    
    if [ "$log_size_mb" -lt "$max_size_mb" ]; then
        log_message "MongoDB log size (${log_size_mb}MB) is below rotation threshold (${max_size_mb}MB)"
        return 0
    fi
    
    log_message "Rotating MongoDB log file (size: ${log_size_mb}MB)"
    
    # Create rotated log file with timestamp
    local timestamp=$(date +%Y%m%d-%H%M%S)
    local rotated_log="${mongodb_log}.${timestamp}"
    
    # Copy current log to rotated file
    if cp "$mongodb_log" "$rotated_log"; then
        log_message "Created rotated log file: $rotated_log"
        
        # Truncate original log file
        if > "$mongodb_log"; then
            log_message "Truncated original log file"
        else
            log_error "Failed to truncate original log file"
            return 1
        fi
        
        # Compress rotated log file
        if gzip "$rotated_log"; then
            log_message "Compressed rotated log file: ${rotated_log}.gz"
        else
            log_warning "Failed to compress rotated log file"
        fi
        
        # Clean up old rotated logs (keep only specified number)
        local old_logs=$(ls -t "${mongodb_log}".* 2>/dev/null | tail -n +$((keep_copies + 1)))
        if [ -n "$old_logs" ]; then
            echo "$old_logs" | xargs rm -f
            log_message "Cleaned up old rotated log files"
        fi
        
        log_success "MongoDB log rotation completed successfully"
        return 0
    else
        log_error "Failed to create rotated log file"
        return 1
    fi
}

# Enhanced log rotation function for migration logs
rotate_migration_logs() {
    local migration_log="${SNAP_COMMON}/mongodb-migration-log.txt"
    local max_size_mb=50
    local keep_copies=5
    
    # Check if migration log file exists and is large enough to rotate
    if [ ! -f "$migration_log" ]; then
        log_message "Migration log file not found, skipping rotation"
        return 0
    fi
    
    # Get log file size in MB
    local log_size_mb=$(du -m "$migration_log" | cut -f1)
    
    if [ "$log_size_mb" -lt "$max_size_mb" ]; then
        log_message "Migration log size (${log_size_mb}MB) is below rotation threshold (${max_size_mb}MB)"
        return 0
    fi
    
    log_message "Rotating migration log file (size: ${log_size_mb}MB)"
    
    # Create rotated log file with timestamp
    local timestamp=$(date +%Y%m%d-%H%M%S)
    local rotated_log="${migration_log}.${timestamp}"
    
    # Copy current log to rotated file
    if cp "$migration_log" "$rotated_log"; then
        log_message "Created rotated migration log file: $rotated_log"
        
        # Truncate original log file
        if > "$migration_log"; then
            log_message "Truncated original migration log file"
        else
            log_error "Failed to truncate original migration log file"
            return 1
        fi
        
        # Compress rotated log file
        if gzip "$rotated_log"; then
            log_message "Compressed rotated migration log file: ${rotated_log}.gz"
        else
            log_warning "Failed to compress rotated migration log file"
        fi
        
        # Clean up old rotated logs (keep only specified number)
        local old_logs=$(ls -t "${migration_log}".* 2>/dev/null | tail -n +$((keep_copies + 1)))
        if [ -n "$old_logs" ]; then
            echo "$old_logs" | xargs rm -f
            log_message "Cleaned up old rotated migration log files"
        fi
        
        log_success "Migration log rotation completed successfully"
        return 0
    else
        log_error "Failed to create rotated migration log file"
        return 1
    fi
}

# Reset MONGO_LOG_DESTINATION to devnull after successful migration - DISABLED
# Snap settings changes are permanently disabled during migration
reset_mongo_log_destination() {
    log_message "MONGO_LOG_DESTINATION reset disabled - snap settings changes not allowed during migration"
    
    # Snap settings changes permanently disabled during migration
    # This ensures no snap configuration is modified during the migration process
    # if snap set wekan mongo-log-destination="devnull" 2>/dev/null; then
    #     log_success "MONGO_LOG_DESTINATION reset to devnull successfully"
    # else
    #     log_error "Failed to reset MONGO_LOG_DESTINATION to devnull"
    #     # Don't fail the migration for this setting issue
    # fi
}

# Migrate raw MongoDB 3 database files
migrate_raw_database_files() {
    log_message "Starting raw MongoDB 3 database files migration"

    # Validate paths are within SNAP_COMMON
    if ! validate_snap_common_path "${SNAP_COMMON}" "Database path"; then
        log_error "Database path validation failed"
        return 1
    fi

    # Stop any running MongoDB processes
    log_message "Stopping any running MongoDB processes"
    pkill -f mongod || true
    sleep 3

    # Start MongoDB 3 with raw files
    log_message "Starting MongoDB 3 with raw database files"
    local mongo3_pid
    mongod --dbpath "${SNAP_COMMON}" --port "${MONGODB_PORT:-27019}" --quiet &
    mongo3_pid=$!

    # Wait for MongoDB 3 to start
    local retry_count=0
    while [ $retry_count -lt 30 ]; do
        if mongosh --quiet --eval "db.adminCommand('ping')" "mongodb://localhost:${MONGODB_PORT:-27019}/admin" >/dev/null 2>&1; then
            log_message "MongoDB 3 started successfully"
            break
        fi
        sleep 1
        retry_count=$((retry_count + 1))
    done

    if [ $retry_count -eq 30 ]; then
        log_error "MongoDB 3 failed to start"
        kill $mongo3_pid 2>/dev/null || true
        return 1
    fi

    # Dump all databases from MongoDB 3
    log_message "Dumping databases from MongoDB 3"
    if ! mongodump --port "${MONGODB_PORT:-27019}" --out "$TEMP_DIR" --dbpath "${SNAP_COMMON}"; then
        log_error "Failed to dump databases from MongoDB 3"
        kill $mongo3_pid 2>/dev/null || true
        return 1
    fi

    # Stop MongoDB 3
    log_message "Stopping MongoDB 3"
    kill $mongo3_pid 2>/dev/null || true
    sleep 3

    # Start MongoDB 7
    log_message "Starting MongoDB 7"
    local mongo7_pid
    mongod --dbpath "${SNAP_COMMON}" --port "${MONGODB_PORT:-27019}" --quiet &
    mongo7_pid=$!

    # Wait for MongoDB 7 to start
    retry_count=0
    while [ $retry_count -lt 30 ]; do
        if mongosh --quiet --eval "db.adminCommand('ping')" "mongodb://localhost:${MONGODB_PORT:-27019}/admin" >/dev/null 2>&1; then
            log_message "MongoDB 7 started successfully"
            break
        fi
        sleep 1
        retry_count=$((retry_count + 1))
    done

    if [ $retry_count -eq 30 ]; then
        log_error "MongoDB 7 failed to start"
        kill $mongo7_pid 2>/dev/null || true
        return 1
    fi

    # Restore databases to MongoDB 7
    log_message "Restoring databases to MongoDB 7"
    if ! mongorestore --port "${MONGODB_PORT:-27019}" --dbpath "${SNAP_COMMON}" "$TEMP_DIR"; then
        log_error "Failed to restore databases to MongoDB 7"
        kill $mongo7_pid 2>/dev/null || true
        return 1
    fi

    # Stop MongoDB 7
    log_message "Stopping MongoDB 7"
    kill $mongo7_pid 2>/dev/null || true
    sleep 3

    # Clean up old MongoDB 3 files
    log_message "Cleaning up old MongoDB 3 files"
    find "${SNAP_COMMON}" -maxdepth 1 -name "*.0" -o -name "*.1" -o -name "*.ns" -o -name "j._*" -o -name "mongod.lock" | while read -r file; do
        if [ -f "$file" ]; then
            rm -f "$file"
            log_message "Removed old file: $file"
        fi
    done

    # Remove journal directory if it exists
    if [ -d "${SNAP_COMMON}/journal" ]; then
        rm -rf "${SNAP_COMMON}/journal"
        log_message "Removed journal directory"
    fi

    log_success "Raw database files migration completed successfully"
    
    # Reset MONGO_LOG_DESTINATION to devnull after successful migration
    reset_mongo_log_destination
    
    return 0
}

# Snap channel detection and switching functions
get_current_snap_channel() {
    local snap_name="$1"
    snap list "$snap_name" 2>/dev/null | awk 'NR==2 {print $4}' || echo "unknown"
}

is_wekan_snap() {
    local snap_name="$1"
    case "$snap_name" in
        wekan|wekan-gantt-gpl|wekan-ondra)
            return 0
            ;;
        *)
            return 1
            ;;
    esac
}

switch_to_stable_channel() {
    local snap_name="$1"
    local current_channel=$(get_current_snap_channel "$snap_name")

    log_message "Snap channel switching disabled - not changing $snap_name channel (currently: $current_channel)"
    log_message "Snap channel changes are permanently disabled during migration"
    return 0
    
    # Snap channel switching permanently disabled during migration
    # This ensures no snap channels are modified during the migration process
    # if [ "$current_channel" != "stable" ] && [ "$current_channel" != "unknown" ]; then
    #     log_message "Switching $snap_name from $current_channel to stable channel"
    #     if snap refresh "$snap_name" --channel=stable; then
    #         log_success "Successfully switched $snap_name to stable channel"
    #         return 0
    #     else
    #         log_error "Failed to switch $snap_name to stable channel"
    #         return 1
    #     fi
    # else
    #     log_message "$snap_name is already on stable channel or not installed"
    #     return 0
    # fi
}

switch_all_wekan_snaps_to_stable() {
    log_message "Checking for Wekan-related snaps to switch to stable channel"

    local wekan_snaps=("wekan" "wekan-gantt-gpl" "wekan-ondra")
    local switched_count=0
    local failed_count=0

    for snap_name in "${wekan_snaps[@]}"; do
        if snap list "$snap_name" >/dev/null 2>&1; then
            if switch_to_stable_channel "$snap_name"; then
                switched_count=$((switched_count + 1))
            else
                failed_count=$((failed_count + 1))
            fi
        fi
    done

    log_message "Channel switching completed: $switched_count successful, $failed_count failed"

    if [ "$failed_count" -gt 0 ]; then
        return 1
    else
        return 0
    fi
}

# Get database collections
get_collections() {
    local mongo_url="$1"
    local collections=$(mongosh --quiet --eval "db.getCollectionNames().join('\n')" "$mongo_url" 2>/dev/null | grep -v "^$" || echo "")
    echo "$collections"
}

# Migrate a single collection
migrate_collection() {
    local collection="$1"
    local mongo3_url="$2"
    local mongo7_url="$3"
    local step="$4"
    local total_steps="$5"

    log_message "Migrating collection: $collection"

    # Check disk space before each collection (estimate 2x collection size)
    local collection_size=$(mongosh --quiet --eval "db.$collection.stats().size" "$mongo3_url" 2>/dev/null || echo "0")
    local required_space=$((collection_size * 2 / 1024 / 1024 / 1024 + 1)) # Convert to GB and add 1GB buffer

    if ! check_disk_space "$required_space"; then
        log_error "Insufficient disk space for collection $collection"
        return 1
    fi

    # Dump collection
    local dump_file="${TEMP_DIR}/${collection}.bson"
    log_message "Dumping collection $collection to $dump_file"

    if ! mongodump --db wekan --collection "$collection" --out "$TEMP_DIR" --port "${MONGODB_PORT:-27019}" --dbpath "${SNAP_COMMON}"; then
        log_error "Failed to dump collection $collection"
        return 1
    fi

    # Restore collection
    log_message "Restoring collection $collection to MongoDB 7"
    if ! mongorestore --db wekan --collection "$collection" "$dump_file" --port "${MONGODB_PORT:-27019}" --dbpath "${SNAP_COMMON}"; then
        log_error "Failed to restore collection $collection"
        return 1
    fi

    # Update progress
    update_progress "$step" "$total_steps" "Migrated collection: $collection"

    # Clean up dump file
    rm -f "$dump_file"

    log_success "Collection $collection migrated successfully"
    return 0
}

# Main migration function
perform_migration() {
    local start_time=$(date +%s)

    log_message "Starting MongoDB migration from version 3 to 7"

    # Rotate MongoDB logs before migration if needed
    log_message "Checking if MongoDB log rotation is needed"
    if ! rotate_mongodb_logs; then
        log_warning "MongoDB log rotation failed, continuing with migration"
    fi
    
    # Rotate migration logs before migration if needed
    log_message "Checking if migration log rotation is needed"
    if ! rotate_migration_logs; then
        log_warning "Migration log rotation failed, continuing with migration"
    fi

    # Create backup before migration
    log_message "Creating backup before migration"
    if ! create_backup; then
        log_error "Failed to create backup, aborting migration"
        return 1
    fi

    # Create temporary directory
    mkdir -p "$TEMP_DIR"

    # Check if we need to migrate raw database files
    if detect_mongodb_upgrade_needed; then
        log_message "MongoDB upgrade needed detected, starting raw file migration"
        if ! migrate_raw_database_files; then
            log_error "Failed to migrate raw database files"
            return 1
        fi
    fi

    # Get MongoDB connection details
    local mongo3_url="mongodb://localhost:${MONGODB_PORT:-27019}/wekan"
    local mongo7_url="mongodb://localhost:${MONGODB_PORT:-27019}/wekan"

    # Get collections to migrate
    log_message "Getting list of collections to migrate"
    local collections=$(get_collections "$mongo3_url")

    if [ -z "$collections" ]; then
        log_error "No collections found to migrate"
        return 1
    fi

    local collection_count=$(echo "$collections" | wc -l)
    log_message "Found $collection_count collections to migrate"

    # Migrate each collection
    local current_step=0
    for collection in $collections; do
        current_step=$((current_step + 1))

        if ! migrate_collection "$collection" "$mongo3_url" "$mongo7_url" "$current_step" "$collection_count"; then
            log_error "Migration failed at collection $collection"
            return 1
        fi

        # Update completion time estimate
        local estimated_time=$(estimate_completion_time "$start_time" "$current_step" "$collection_count")
        log_message "Estimated completion time: $estimated_time"
    done

    # Mark migration as completed
    cat > "$MIGRATION_STATUS" << EOF
{
    "step": $collection_count,
    "total_steps": $collection_count,
    "percentage": 100,
    "description": "Migration completed successfully",
    "timestamp": "$(date -Iseconds)",
    "status": "completed"
}
EOF

    # Create MongoDB 7 version marker
    touch "${SNAP_COMMON}/mongodb-version-7"

    # Clean up temporary files
    rm -rf "$TEMP_DIR"

    # Switch Wekan snaps to stable channel after successful migration
    log_message "Switching Wekan snaps to stable channel after successful migration"
    if switch_all_wekan_snaps_to_stable; then
        log_success "All Wekan snaps switched to stable channel successfully"
    else
        log_error "Some Wekan snaps failed to switch to stable channel"
        # Don't fail the migration for channel switching issues
    fi

    log_success "MongoDB migration completed successfully"
    
    # Rotate MongoDB logs after successful migration
    log_message "Rotating MongoDB logs after successful migration"
    if ! rotate_mongodb_logs; then
        log_warning "MongoDB log rotation after migration failed"
    fi
    
    # Rotate migration logs after successful migration
    log_message "Rotating migration logs after successful migration"
    if ! rotate_migration_logs; then
        log_warning "Migration log rotation after migration failed"
    fi
    
    # Reset MONGO_LOG_DESTINATION to devnull after successful migration
    reset_mongo_log_destination
    
    return 0
}

# Revert migration
revert_migration() {
    log_message "Reverting MongoDB migration"

    if [ ! -f "$REVERT_FILE" ]; then
        log_error "Revert file not found: $REVERT_FILE"
        return 1
    fi

    # Stop MongoDB 7 - DISABLED
    log_message "MongoDB stopping disabled - not using snapctl stop"
    # snapctl stop --disable "${SNAP_NAME}.mongodb"

    # Remove MongoDB 7 version marker
    rm -f "${SNAP_COMMON}/mongodb-version-7"

    # Find the most recent backup directory
    local latest_backup=$(ls -td "${SNAP_COMMON}/mongodb-backup-"* 2>/dev/null | head -1)

    if [ -n "$latest_backup" ] && [ -d "$latest_backup" ]; then
        log_message "Restoring from backup: $latest_backup"

        # Stop any running MongoDB processes
        pkill -f mongod || true
        sleep 2

        # Remove current database directory
        rm -rf "${SNAP_COMMON}/wekan"

        # Restore from backup
        cp -r "$latest_backup"/* "${SNAP_COMMON}/"

        # Clean up backup directory
        rm -rf "$latest_backup"

        log_success "Database restored from backup"
    else
        log_error "No backup found for revert"
        return 1
    fi

    # Remove revert file
    rm -f "$REVERT_FILE"

    # Clear migration status
    rm -f "$MIGRATION_STATUS"

    # Start MongoDB 3 - DISABLED
    log_message "MongoDB starting disabled - not using snapctl start"
    # snapctl start --enable "${SNAP_NAME}.mongodb"

    log_success "Migration reverted successfully"
    return 0
}

# Main execution
main() {
    log_message "MongoDB Migration Script started"

    # Validate all paths are within SNAP_COMMON
    if ! validate_all_paths; then
        log_error "Path validation failed - aborting migration"
        exit 1
    fi

    # Check if revert is requested
    if [ -f "$REVERT_FILE" ]; then
        revert_migration
        exit $?
    fi

    # Check if migration is needed
    if ! check_migration_needed; then
        exit 0
    fi

    # Perform migration
    if perform_migration; then
        log_success "Migration completed successfully"
        exit 0
    else
        log_error "Migration failed"
        exit 1
    fi
}

# Run main function
main "$@"