#!/bin/bash

# Pre-commit hook to update video transcoding hashes
# This ensures .transcoded-videos.txt is always current

echo "🔍 Checking video files for changes..."

# Create/update .transcoded-videos.txt with current video hashes
if [ -d "content/videos" ]; then
    # Create temporary file
    temp_file=$(mktemp)

    # Calculate hashes for all video files
    for video in content/videos/*.mp4 content/videos/*.mov content/videos/*.avi content/videos/*.mkv; do
        if [ -f "$video" ]; then
            basename=$(basename "$video")
            file_hash=$(sha256sum "$video" | cut -d' ' -f1)
            echo "$file_hash $basename" >> "$temp_file"
        fi
    done

    # Sort the file for consistency
    sort "$temp_file" > .transcoded-videos.txt
    rm "$temp_file"

    # Add to staging area if it changed
    if ! git diff --quiet --cached .transcoded-videos.txt 2>/dev/null; then
        echo "📝 Updated .transcoded-videos.txt with current video hashes"
        git add .transcoded-videos.txt
    fi
else
    # No videos directory, ensure file is empty
    if [ -f .transcoded-videos.txt ] && [ -s .transcoded-videos.txt ]; then
        echo "🗑️  No videos found, clearing .transcoded-videos.txt"
        > .transcoded-videos.txt
        git add .transcoded-videos.txt
    fi
fi

echo "✅ Video hash check complete"

stages:
  - build
  - deploy

variables:
  PIP_CACHE_DIR: "$CI_PROJECT_DIR/.cache/pip"

cache:
  paths:
    - .cache/pip/

build_site:
  stage: build
  image:
    name: linuxserver/ffmpeg
    entrypoint: [""]
  variables:
    GIT_SSL_NO_VERIFY: "1"
  before_script:
    - apt-get update && apt-get install -y git git-lfs python3 python3-pip
    - git lfs install
    - git lfs pull
    - pip3 install pelican markdown typogrify --break-system-packages
  script:
    - echo "=== TRANSCODING VIDEOS ==="
    - mkdir -p temp_videos
    - echo "Video file info:"
    - ls -la content/videos/ || echo "No videos directory"
    - |
      # Load hash-based tracking file (format: hash filename)
      touch .transcoded-videos.txt
      echo "📋 Already transcoded videos:"
      cat .transcoded-videos.txt || echo "  (none)"
      echo

      if [ -d "content/videos" ]; then
        for video in content/videos/*.mp4 content/videos/*.mov content/videos/*.avi content/videos/*.mkv; do
          if [ -f "$video" ]; then
            basename=$(basename "$video")
            name_only="${basename%.*}"

            # Calculate file hash
            file_hash=$(sha256sum "$video" | cut -d' ' -f1)
            echo "🔍 $basename -> $file_hash"

            # Check if this hash is already transcoded
            if grep -q "^$file_hash " .transcoded-videos.txt; then
              echo "⏭️  Skipping $basename (hash matches - video unchanged)"
              continue
            fi

            # Remove any old entries for this filename (in case video was updated)
            sed -i "/ $basename$/d" .transcoded-videos.txt

            echo "🎬 Transcoding: $video -> $name_only (this will take ~10 minutes)"
            mkdir -p "temp_videos/$name_only"

            # CPU transcoding
            ffmpeg -i "$video" \
                -c:v libx264 -preset ultrafast -crf 30 \
                -c:a aac -b:a 96k \
                -threads 0 \
                -hls_time 6 -hls_playlist_type vod \
                -hls_segment_filename "temp_videos/$name_only/segment_%03d.ts" \
                "temp_videos/$name_only/playlist.m3u8"

            # Record the hash for this file
            echo "$file_hash $basename" >> .transcoded-videos.txt
            echo "✅ Completed: $name_only (hash: $file_hash)"
            echo "💾 Added to .transcoded-videos.txt - commit this file to skip future re-encoding"
          fi
        done
      else
        echo "No videos found in content/videos/"
      fi

    - echo "=== TRANSCODING COMPLETE ==="
    - |
      # Note: .transcoded-videos.txt is managed by the pre-commit hook
      # No need to commit from CI as it would create a build loop
      if ! git diff --quiet .transcoded-videos.txt; then
        echo "📝 .transcoded-videos.txt was updated during transcoding"
        echo "💡 Make sure to commit this file locally to skip re-encoding in future runs"
      else
        echo "📋 No hash changes - all videos were already transcoded"
      fi
    - echo "=== BUILDING PELICAN SITE ==="
    - python3 -m pelican content -s publishconf.py
    - echo "=== COPYING NEW VIDEOS TO FINAL OUTPUT ==="
    - |
      if [ -d "temp_videos" ] && [ "$(ls -A temp_videos 2>/dev/null)" ]; then
        echo "Moving newly transcoded videos to output/videos/..."
        mkdir -p output/videos
        cp -r temp_videos/* output/videos/
        echo "✅ New videos copied to output"
      else
        echo "📭 No new videos to copy"
      fi
    - echo "=== RSYNC TO SERVER ==="
    - apt-get install -y openssh-client rsync sshpass
    - |
      if [ -n "$SSH_PRIVATE_KEY" ]; then
        mkdir -p ~/.ssh
        chmod 700 ~/.ssh
        echo "$SSH_PRIVATE_KEY" | tr -d '\r' > ~/.ssh/id_rsa
        chmod 600 ~/.ssh/id_rsa
        ssh-keyscan -H [SERVER_IP] >> ~/.ssh/known_hosts

        # Sync site content (excluding videos to preserve existing ones)
        echo "🌐 Syncing site content (excluding videos)..."
        rsync -avz --delete --exclude='.git*' --exclude='/videos/' output/ root@[SERVER_IP]:/var/www/gmalloc.com/

        # Sync only new videos (no --delete to preserve existing videos)
        if [ -d "output/videos" ] && [ "$(ls -A output/videos 2>/dev/null)" ]; then
          echo "🎬 Syncing new videos (preserving existing)..."
          rsync -avz --exclude='.git*' output/videos/ root@[SERVER_IP]:/var/www/gmalloc.com/videos/
        fi

      elif [ -n "$SSH_PASSWORD" ]; then
        # Sync site content (excluding videos to preserve existing ones)
        echo "🌐 Syncing site content (excluding videos)..."
        sshpass -p "$SSH_PASSWORD" rsync -avz --delete --exclude='.git*' --exclude='/videos/' -e "ssh -o StrictHostKeyChecking=no" output/ root@[SERVER_IP]:/var/www/gmalloc.com/

        # Sync only new videos (no --delete to preserve existing videos)
        if [ -d "output/videos" ] && [ "$(ls -A output/videos 2>/dev/null)" ]; then
          echo "🎬 Syncing new videos (preserving existing)..."
          sshpass -p "$SSH_PASSWORD" rsync -avz --exclude='.git*' -e "ssh -o StrictHostKeyChecking=no" output/videos/ root@[SERVER_IP]:/var/www/gmalloc.com/videos/
        fi

      else
        echo "No SSH credentials available!"
        exit 1
      fi
    - echo "Deployment complete!"
  only:
    - main