name: Update Community Skins README

on:
  schedule:
    - cron: '*/5 * * * *'
  workflow_dispatch:

env:
  README_PATH: "${{ github.workspace }}/README.md"
  IMAGE_NAME: osc/skins-image
  GITEA_API: https://${{ vars.CONTAINER_REGISTRY }}/api/v1
  ARTIFACT_PATH: "/data"
  USER_ROWS_FILE: "/data/user_rows.txt"
  AVATAR_ROWS_FILE: "/data/avatar_rows.txt"

jobs:
  gather-skins:
    runs-on: ubuntu-latest
    container:
      image: ${{ vars.CONTAINER_REGISTRY }}/${{ env.IMAGE_NAME }}:latest

    steps:
      - id: mask-secrets
        name: Mask Sensitive Tokens
        run: |
          echo "::add-mask::${{ secrets.TOKEN }}"
          echo "::add-mask::${{ secrets.OSUAPIV1 }}"

      - id: checkout-code
        name: Checkout Repository
        uses: actions/checkout@v4
        with:
          token: ${{ secrets.TOKEN }}

      - id: fetch-skins-data
        name: Find Skin Repositories and Generate Tables
        run: |
          set -eo pipefail
          mkdir -p "$ARTIFACT_PATH"
          total_valid_entries=0

          json_valid() {
            jq -e . >/dev/null 2>&1
          }

          fetch_json() {
            url="$1"
            body_file=$(mktemp)
            code=$(curl --retry 3 --retry-delay 5 -s \
              -H "Authorization: token ${{ secrets.TOKEN }}" \
              -o "$body_file" -w "%{http_code}" "$url")
            echo "$code" "$body_file"
          }

          page=1
          while :; do
            # --- Fetch user list ---
            set -- $(fetch_json "$GITEA_API/admin/users?limit=50&page=$page&_ts=$(date +%s)")
            users_code="$1"
            users_body="$2"
            users_json=$(cat "$users_body")

            if [ "$users_code" != "200" ] || ! printf "%s" "$users_json" | json_valid; then
              echo "❌ Invalid users JSON on page $page (HTTP $users_code)"
              echo "$users_json" > "$ARTIFACT_PATH/invalid_users_page_${page}.json"
              break
            fi

            count=$(printf "%s" "$users_json" | jq 'length')
            [ "$count" -eq 0 ] && break
            echo "📄 Found $count users on page $page"

            # --- Loop through users ---
            for i in $(seq 0 $((count - 1))); do
              user_login=$(printf "%s" "$users_json" | jq -r ".[$i].login")
              echo "🔍 User: $user_login"

              # --- Fetch repos list ---
              set -- $(fetch_json "$GITEA_API/users/$user_login/repos?_ts=$(date +%s)")
              repos_code="$1"
              repos_body="$2"
              repos_json=$(cat "$repos_body")

              if [ "$repos_code" != "200" ] || ! printf "%s" "$repos_json" | json_valid; then
                echo "  ❌ Invalid repo list for $user_login (HTTP $repos_code)"
                echo "$repos_json" > "$ARTIFACT_PATH/invalid_repos_${user_login}.json"
                continue
              fi

              repos_count=$(printf "%s" "$repos_json" | jq 'length')
              echo "  📦 $repos_count repos found"
              [ "$repos_count" -eq 0 ] && continue

              # --- Loop through repos ---
              for j in $(seq 0 $((repos_count - 1))); do
                owner=$(printf "%s" "$repos_json" | jq -r ".[$j].owner.login")
                repo=$(printf "%s" "$repos_json" | jq -r ".[$j].name")
                html_url=$(printf "%s" "$repos_json" | jq -r ".[$j].html_url")

                echo "    → Repo: $owner/$repo"

                # --- Check Skins directory ---
                set -- $(fetch_json "$GITEA_API/repos/$owner/$repo/contents/Skins?_ts=$(date +%s)")
                dir_code="$1"

                if [ "$dir_code" != "200" ]; then
                  echo "      ❌ Skipped: No Skins/ directory (HTTP $dir_code)"
                  continue
                fi

                # --- Fetch README.md ---
                set -- $(fetch_json "$GITEA_API/repos/$owner/$repo/contents/README.md?_ts=$(date +%s)")
                readme_code="$1"
                readme_body="$2"
                readme_json=$(cat "$readme_body")

                if [ "$readme_code" != "200" ] || ! printf "%s" "$readme_json" | json_valid; then
                  echo "      ❌ Skipped: No README.md or invalid JSON (HTTP $readme_code)"
                  continue
                fi

                # Decode README
                content=$(printf "%s" "$readme_json" | jq -r .content | base64 -d 2>/dev/null || echo "")

                osu_id=$(printf "%s" "$content" | grep -oE "osuid:[ ]*[0-9]+" | grep -oE "[0-9]+" | head -1)
                if [ -z "$osu_id" ]; then
                  echo "      ❌ Skipped: No osuid in README"
                  continue
                fi

                # --- Fetch osu API ---
                set -- $(fetch_json "https://osu.ppy.sh/api/get_user?k=${{ secrets.OSUAPIV1 }}&u=$osu_id&type=id&_ts=$(date +%s)")
                api_code="$1"
                api_body="$2"
                osu_json=$(cat "$api_body")

                if ! printf "%s" "$osu_json" | json_valid; then
                  echo "      ❌ Invalid osu! API JSON for $osu_id"
                  printf "%s" "$osu_json" > "$ARTIFACT_PATH/invalid_osu_user_${osu_id}.json"
                  continue
                fi

                if [ "$(printf "%s" "$osu_json" | jq 'length')" -eq 0 ]; then
                  echo "      🚫 Restricted or banned user"

                  username="$owner"
                  pp_rank="RESTRICTED"
                  pp_country_rank="RESTRICTED"
                  padded_rank="9999999"
                  profile_url="https://osu.ppy.sh/users/$osu_id"

                  timestamp=$(( $(date +%s)/86400*86400 ))
                  avatar_url="https://a.ppy.sh/$osu_id?$timestamp"

                  printf "%s|<tr><td>%s</td><td>%s</td><td>%s</td><td><a href=\"%s\">Profile</a></td><td><a href=\"%s\">Skins</a></td></tr>\n" \
                    "$padded_rank" "$username" "$pp_rank" "$pp_country_rank" "$profile_url" "$html_url" >> "$USER_ROWS_FILE"

                  printf "%s|<a href=\"%s\"><img src=\"%s\" width=\"175\" height=\"175\"></a>\n" \
                    "$padded_rank" "$html_url" "$avatar_url" >> "$AVATAR_ROWS_FILE"

                  total_valid_entries=$((total_valid_entries + 1))
                  continue
                fi

                # Normal osu user
                pp_rank=$(printf "%s" "$osu_json" | jq -r '.[0].pp_rank // "9999999"')
                pp_country_rank=$(printf "%s" "$osu_json" | jq -r '.[0].pp_country_rank // "-"')
                country=$(printf "%s" "$osu_json" | jq -r '.[0].country // "-"')
                username=$(printf "%s" "$osu_json" | jq -r '.[0].username')

                padded_rank=$(printf "%07d" "$pp_rank")

                if [ "$pp_country_rank" != "-" ] && [ "$country" != "-" ]; then
                  cc_rank="${country}${pp_country_rank}"
                else
                  cc_rank="-"
                fi

                timestamp=$(( $(date +%s)/86400*86400 ))

                printf "%s|<tr><td>%s</td><td>%s</td><td>%s</td><td><a href=\"https://osu.ppy.sh/users/%s\">Profile</a></td><td><a href=\"%s\">Skins</a></td></tr>\n" \
                  "$padded_rank" "$username" "$pp_rank" "$cc_rank" "$osu_id" "$html_url" >> "$USER_ROWS_FILE"

                printf "%s|<a href=\"%s\"><img src=\"https://a.ppy.sh/%s?%s\" width=\"175\" height=\"175\"></a>\n" \
                  "$padded_rank" "$html_url" "$osu_id" "$timestamp" >> "$AVATAR_ROWS_FILE"

                echo "      ✅ Added: $username (#$pp_rank, $cc_rank)"
                total_valid_entries=$((total_valid_entries + 1))
              done
            done

            page=$((page + 1))
          done

          echo "✅ Total valid entries found: $total_valid_entries"


      - id: upload-tables
        name: Upload artifacts
        uses: actions/upload-artifact@v3
        with:
          name: skin-tables
          path: ${{ env.ARTIFACT_PATH }}
          retention-days: 1

  generate-readme:
    needs: gather-skins
    runs-on: ubuntu-latest
    container:
      image: ${{ vars.CONTAINER_REGISTRY }}/${{ env.IMAGE_NAME }}:latest
    outputs:
      readme_changed: ${{ steps.check-readme.outputs.changed }}

    steps:
      - id: download-skin-data
        name: Download skin data
        uses: actions/download-artifact@v3
        with:
          name: skin-tables
          path: ${{ env.ARTIFACT_PATH }}

      - id: checkout-code
        name: Checkout Repository
        uses: actions/checkout@v4
        with:
          token: ${{ secrets.TOKEN }}

      - id: generate-readme
        name: Generate README
        run: |
          set -eo pipefail

          cat > "$README_PATH" <<-EOF
          # osu! Swiss Community Skin collection

          Welcome to the osu! Swiss Community Skin collection, this repository archives and showcases Skins osc members use.

          Enjoy looking around, click file names to download the skins and click on the images to see more about the skins.

          ## How do I add my skins here?

          If you're interested in adding your skins here please follow this tutorial [how-to-use](/how-to-use.md)

          ## Skins

          <details>
            <summary>list instead of icons</summary>
            <br />
            <table border="1" cellpadding="5" cellspacing="0">
              <thead>
                <tr>
                  <th>Name</th>
                  <th>Global Rank</th>
                  <th>Country Rank</th>
                  <th>Profile</th>
                  <th>Skins</th>
                </tr>
              </thead>
              <tbody>
          EOF

          sort -t '|' -k1,1n "$USER_ROWS_FILE" | cut -d'|' -f2- | sed 's/^/        /' >> "$README_PATH"

          cat >> "$README_PATH" <<-EOF
              </tbody>
            </table>
          </details>

          <p align="center">
          EOF

          sort -t '|' -k1,1n "$AVATAR_ROWS_FILE" | cut -d'|' -f2- | sed 's/^/  /' >> "$README_PATH"

          cat >> "$README_PATH" <<-EOF
          </p>
          EOF

      - id: check-readme
        name: Check for README changes
        run: |
          set -euo pipefail

          # Compute checksums: repo version vs generated version
          old_sum=$(git show HEAD:README.md | md5sum | awk '{print $1}')
          new_sum=$(md5sum README.md | awk '{print $1}')

          if [ "$old_sum" = "$new_sum" ]; then
            echo "changed=false" >> "$GITHUB_OUTPUT"
            echo "✅ README unchanged"
          else
            echo "changed=true" >> "$GITHUB_OUTPUT"
            echo "⚠️ README changed"
          fi

      - id: upload-updated-readme
        name: Upload updated README
        if: steps.check-readme.outputs.changed == 'true'
        uses: actions/upload-artifact@v3
        with:
          name: updated-readme
          path: ${{ env.README_PATH }}
          retention-days: 1

  commit-readme:
    needs: generate-readme
    if: needs.generate-readme.outputs.readme_changed == 'true'
    runs-on: ubuntu-latest
    container:
      image: ${{ vars.CONTAINER_REGISTRY }}/${{ env.IMAGE_NAME }}:latest

    steps:
      - id: checkout-code
        name: Checkout Repository
        uses: actions/checkout@v4
        with:
          token: ${{ secrets.TOKEN }}

      - id: configure-git
        name: Configure Git
        run: |
          git config user.email "arlind@sulej.ch"
          git config user.name "ci-bot"
          git config lfs.https://${{ vars.CONTAINER_REGISTRY }}/arlind/skins.git/info/lfs.locksverify true

      - id: rebase-repository
        name: Rebase Repository
        run: |
          git fetch origin main
          git rebase origin/main || {
            echo "⚠️ Git rebase failed, likely due to conflicts."
            git rebase --abort || true
            exit 1
          }

      - id: download-updated-readme
        name: Download README
        uses: actions/download-artifact@v3
        with:
          name: updated-readme
          path: .

      - id: commit-and-push
        name: Commit and Push README
        run: |
          git config advice.addIgnoredFile false
          git add README.md
          git commit -m "[ci skip] push back from pipeline" -q || echo "No changes to commit"

          if [ "${GITHUB_REF}" = "refs/heads/main" ]; then
            git push origin HEAD:main || echo "No changes to push"
          else
            git push origin HEAD:"${GITHUB_REF_NAME}" || echo "No changes to push"
          fi