#!/bin/bash

# DTO ARCHIVE PROTOCOL: Upload-then-Delete Workflow
# Automated process to upload assets to HF/Xet, verify, then safely delete local copies
# Prometheus - Head of Data Migration & Transfer Operations

set -euo pipefail

# Load configuration
SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
DTO_ROOT="$(dirname "$SCRIPT_DIR")"
ENV_FILE="$DTO_ROOT/.env"

if [ -f "$ENV_FILE" ]; then
    # Source the .env file to load all variables
    set -a
    source "$ENV_FILE"
    set +a
    echo "✅ Loaded .env file from $ENV_FILE"
else
    echo "❌ .env file not found at $ENV_FILE"
    exit 1
fi

# Configuration
PROTOCOL_LOG="/tmp/archive_protocol_$(date +%Y%m%d_%H%M%S).log"
BACKUP_DIR="/tmp/archive_backup_$(date +%Y%m%d_%H%M%S)"
UPLOAD_MANIFEST="$BACKUP_DIR/upload_manifest.txt"
DELETE_MANIFEST="$BACKUP_DIR/delete_manifest.txt"

# Target repositories
REPO_MODELS="$HF_REPO_MODELS"
REPO_DATASETS="$HF_REPO_DATASETS"
REPO_ARTIFACTS="$HF_REPO_ARTIFACTS"

# Colors for output
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
BLUE='\033[0;34m'
NC='\033[0m' # No Color

# Logging functions
log() {
    echo -e "${GREEN}[$(date '+%Y-%m-%d %H:%M:%S')]${NC} $1" | tee -a "$PROTOCOL_LOG"
}

error() {
    echo -e "${RED}[ERROR]${NC} $1" | tee -a "$PROTOCOL_LOG" >&2
}

warning() {
    echo -e "${YELLOW}[WARNING]${NC} $1" | tee -a "$PROTOCOL_LOG"
}

info() {
    echo -e "${BLUE}[INFO]${NC} $1" | tee -a "$PROTOCOL_LOG"
}

# Phase 1: Discovery & Inventory
discovery_phase() {
    log "=== PHASE 1: DISCOVERY & INVENTORY ==="
    mkdir -p "$BACKUP_DIR"
    
    # Discover space optimization opportunities
    log "Discovering space optimization opportunities..."
    
    # 1. Experiments directory
    log "Inventory: /data/experiments/"
    find /data/experiments -type f \( -name "*.safetensors" -o -name "*.pt" -o -name "*.bin" \) > "$BACKUP_DIR/experiments_files.txt"
    find /data/experiments -type f \( -name "*.parquet" -o -name "*.jsonl" -o -name "*.csv" \) >> "$BACKUP_DIR/experiments_files.txt"
    
    # 2. Data directory components (exclude cache and problematic directories)
    log "Inventory: /data/data/ workspace (excluding cache)"
    find /data/data/workspace -type f -size +100M ! -path "*/.cache/*" ! -path "*/.local/*" 2>/dev/null > "$BACKUP_DIR/data_files.txt" || true
    
    # Create combined manifest
    cat "$BACKUP_DIR/experiments_files.txt" "$BACKUP_DIR/data_files.txt" | sort -u > "$UPLOAD_MANIFEST"
    
    local total_files=$(wc -l < "$UPLOAD_MANIFEST")
    local total_size=$(while read -r f; do du -b "$f" 2>/dev/null | cut -f1; done < "$UPLOAD_MANIFEST" | awk '{sum += $1} END {print sum}')
    
    log "Discovered $total_files files for potential archiving"
    log "Total size: $(numfmt --to=iec $total_size)"
    
    # Show top 5 largest files
    log "Top 5 largest files:"
    while read -r f; do du -h "$f" 2>/dev/null | cut -f1 | xargs -I {} echo "   {} - $f"; done < "$UPLOAD_MANIFEST" | sort -rh | head -5 | tee -a "$PROTOCOL_LOG"
}

# Phase 2: Upload to HF/Xet
upload_phase() {
    log "=== PHASE 2: UPLOAD TO HF/XET ==="
    
    local uploaded_count=0
    local skipped_count=0
    local failed_count=0
    
    # Create upload tracking file
    echo "# Archive Protocol Upload Log - $(date)" > "$BACKUP_DIR/upload_results.txt"
    
    while read -r file_path; do
        if [ ! -f "$file_path" ]; then
            warning "File not found: $file_path"
            skipped_count=$((skipped_count + 1))
            continue
        fi
        
        # Determine repository based on file type
        local repo="$REPO_ARTIFACTS"
        local filename=$(basename "$file_path")
        
        if [[ "$filename" == *.safetensors ]] || [[ "$filename" == *.pt ]] || [[ "$filename" == *.bin ]]; then
            repo="$REPO_MODELS"
        elif [[ "$filename" == *.parquet ]] || [[ "$filename" == *.jsonl ]] || [[ "$filename" == *.csv ]]; then
            repo="$REPO_DATASETS"
        fi
        
        # Create relative path for repository
        local relative_path=""
        if [[ "$file_path" == /data/experiments/* ]]; then
            relative_path="experiments/$(echo "$file_path" | sed 's|/data/experiments/||')"
        elif [[ "$file_path" == /data/data/* ]]; then
            relative_path="data/$(echo "$file_path" | sed 's|/data/data/||')"
        else
            relative_path="other/$(basename "$file_path")"
        fi
        
        log "Uploading: $relative_path → $repo"
        
        # Debug: Check if environment variables are set
        if [ -z "$HF_TOKEN" ]; then
            error "HF_TOKEN is not set"
            exit 1
        fi
        
        # Upload using our client with token passed directly
        if python3 -c "
import os
from integrations.huggingface_client import HuggingFaceClient

# Use token directly instead of environment variable
client = HuggingFaceClient(token='$HF_TOKEN')
if not client.is_authenticated():
    print('NOT_AUTHENTICATED')
    exit(1)

success = client.upload_artifact('$file_path', '$relative_path', '$repo')
if success:
    print('SUCCESS')
else:
    print('FAILED')
    exit(1)
" 2>> "$PROTOCOL_LOG"; then
            echo "✅ SUCCESS: $file_path → $repo/$relative_path" | tee -a "$BACKUP_DIR/upload_results.txt"
            echo "$file_path" >> "$DELETE_MANIFEST"
            uploaded_count=$((uploaded_count + 1))
        else
            error "FAILED: $file_path"
            echo "❌ FAILED: $file_path" >> "$BACKUP_DIR/upload_results.txt"
            failed_count=$((failed_count + 1))
        fi
        
    done < "$UPLOAD_MANIFEST"
    
    log "Upload phase completed:"
    log "   ✅ Uploaded: $uploaded_count files"
    log "   ⚠️  Skipped: $skipped_count files"
    log "   ❌ Failed: $failed_count files"
    
    if [ $uploaded_count -eq 0 ]; then
        error "No files were uploaded successfully"
        exit 1
    fi
}

# Phase 3: Verification
verification_phase() {
    log "=== PHASE 3: VERIFICATION ==="
    
    log "Verifying uploads on HF repositories..."
    
    python3 -c "
import os
from huggingface_hub import HfApi

api = HfApi(token='$HF_TOKEN')

repos = ['$REPO_MODELS', '$REPO_DATASETS', '$REPO_ARTIFACTS']

for repo in repos:
    try:
        info = api.repo_info(repo)
        print(f'✅ {repo}: {len(info.siblings)} files, {info.size} bytes')
        
        # List files if repository has content
        if info.siblings:
            for file in info.siblings[:5]:  # Show first 5 files
                print(f'   - {file.rfilename} ({file.size} bytes)')
        
    except Exception as e:
        print(f'❌ {repo}: {e}')
" | tee -a "$PROTOCOL_LOG"
    
    log "Verification completed"
}

# Phase 4: Safe Deletion (Optional)
deletion_phase() {
    log "=== PHASE 4: SAFE DELETION (OPTIONAL) ==="
    
    if [ ! -f "$DELETE_MANIFEST" ] || [ ! -s "$DELETE_MANIFEST" ]; then
        warning "No files marked for deletion - skipping deletion phase"
        return
    fi
    
    local delete_count=$(wc -l < "$DELETE_MANIFEST")
    local total_size=0
    
    log "Found $delete_count files ready for safe deletion"
    
    # Calculate total space to be freed
    while read -r file; do
        if [ -f "$file" ]; then
            size=$(du -b "$file" 2>/dev/null | cut -f1 || echo 0)
            total_size=$((total_size + size))
        fi
    done < "$DELETE_MANIFEST"
    
    log "Total space to free: $(numfmt --to=iec $total_size)"
    
    # Confirm deletion
    read -p "Do you want to proceed with deletion? (y/N): " -n 1 -r
    echo
    if [[ ! $REPLY =~ ^[Yy]$ ]]; then
        log "Deletion cancelled by user"
        return
    fi
    
    # Perform safe deletion
    local deleted_count=0
    local failed_count=0
    
    while read -r file_path; do
        if [ -f "$file_path" ]; then
            if rm -v "$file_path" 2>/dev/null; then
                echo "✅ DELETED: $file_path" | tee -a "$PROTOCOL_LOG"
                deleted_count=$((deleted_count + 1))
            else
                error "FAILED to delete: $file_path"
                failed_count=$((failed_count + 1))
            fi
        else
            warning "File already gone: $file_path"
        fi
    done < "$DELETE_MANIFEST"
    
    log "Deletion completed:"
    log "   ✅ Deleted: $deleted_count files"
    log "   ❌ Failed: $failed_count files"
    
    # Show disk space after deletion
    log "Disk space after deletion:"
    df -h /data | tee -a "$PROTOCOL_LOG"
}

# Phase 5: Cleanup & Report
cleanup_phase() {
    log "=== PHASE 5: CLEANUP & REPORT ==="
    
    # Create summary report
    local total_uploaded=$(grep -c "✅ SUCCESS" "$BACKUP_DIR/upload_results.txt" 2>/dev/null || echo 0)
    local total_failed=$(grep -c "❌ FAILED" "$BACKUP_DIR/upload_results.txt" 2>/dev/null || echo 0)
    
    cat > "$BACKUP_DIR/summary_report.md" << EOF
# DTO Archive Protocol Summary

## Execution Details
- **Timestamp**: $(date)
- **Protocol Log**: $PROTOCOL_LOG
- **Backup Directory**: $BACKUP_DIR

## Results
- **Files Discovered**: $(wc -l < "$UPLOAD_MANIFEST" 2>/dev/null || echo 0)
- **Successfully Uploaded**: $total_uploaded
- **Upload Failures**: $total_failed
- **Files Deleted**: $(wc -l < "$DELETE_MANIFEST" 2>/dev/null || echo 0)

## Repository Status
- **Models Repository**: $REPO_MODELS
- **Datasets Repository**: $REPO_DATASETS
- **Artifacts Repository**: $REPO_ARTIFACTS

## Next Steps
1. Verify uploads on Hugging Face Hub
2. Monitor repository storage usage
3. Run regular archive protocols for new data
4. Review failed uploads for manual intervention

EOF
    
    log "Summary report created: $BACKUP_DIR/summary_report.md"
    log "Protocol completed successfully!"
}

# Main execution
main() {
    log "🚀 STARTING DTO ARCHIVE PROTOCOL"
    log "Timestamp: $(date)"
    log "Protocol log: $PROTOCOL_LOG"
    log "Backup directory: $BACKUP_DIR"
    
    # Execute phases
    discovery_phase
    upload_phase
    verification_phase
    
    # Only proceed to deletion if explicitly requested
    if [ "${1:-}" = "--delete" ]; then
        deletion_phase
    else
        log "Skipping deletion phase (use --delete to enable)"
    fi
    
    cleanup_phase
    
    log "✅ ARCHIVE PROTOCOL COMPLETED SUCCESSFULLY"
}

# Run main function
main "$@"