name: AI Translation Check

on:
  pull_request:
    types:
      - opened
    paths:
      - 'src/i18n/**'
  issue_comment:
    types:
      - created

permissions:
  contents: read
  pull-requests: write
  issues: write

jobs:
  review:
    name: Review Translation
    if: >
      ${{
        github.event_name == 'pull_request' ||
        (
          github.event_name == 'issue_comment' &&
          github.event.action == 'created' &&
          github.event.issue.pull_request != null &&
          github.event.comment.user.login == 'vaxerski' &&
          github.event.comment.body == 'ai, please recheck'
        )
      }}
    runs-on: ubuntu-latest
    env:
      OPENAI_MODEL: gpt-5-mini
      SYSTEM_PROMPT: |
        You are a programmer and a translator. Your job is to review the attached patch for adding translation to a piece of software and make sure the submitted translation is not malicious, and that it makes sense. If the translation is not malicious, and doesn't contain obvious grammatical mistakes, say "Translation check OK". Otherwise, say "Translation check not ok" and list bad entries.
        Examples of bad translations include obvious trolling (slurs, etc) or nonsense sentences. Meaningful improvements may be suggested, but if there are only minor improvements, just reply with "Translation check OK". Do not provide anything but the result and (if applicable) the bad entries or improvements.

      AI_PROMPT: Translation patch below.

    steps:
      - name: Download combined PR diff
        id: get_diff
        run: |
          # Get the combined diff for the entire PR
          curl -sSL \
            "${{ github.event.pull_request.diff_url }}" \
            -o pr.diff

          # Compute character length
          LEN=$(wc -c < pr.diff | tr -d ' ')
          echo "len=$LEN" >> "$GITHUB_OUTPUT"
          if [ "$LEN" -gt 25000 ]; then
            echo "too_long=true" >> "$GITHUB_OUTPUT"
          else
            echo "too_long=false" >> "$GITHUB_OUTPUT"
          fi

          echo "got diff:"
          cat pr.diff

      - name: Comment when diff length exceeded
        if: steps.get_diff.outputs.too_long == 'true'
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          jq -n --arg body "Diff length exceeded, can't query API" '{body: ("AI translation check result:\n\n" + $body)}' > body.json
          curl -sS -X POST \
            -H "Authorization: token $GITHUB_TOKEN" \
            -H "Content-Type: application/json" \
            "https://api.github.com/repos/${{ github.repository }}/issues/${{ github.event.pull_request.number }}/comments" \
            --data @body.json

      - name: Query OpenAI and post review
        if: steps.get_diff.outputs.too_long == 'false'
        env:
          OPENAI_API_KEY: ${{ secrets.OPENAI_API_KEY }}
          OPENAI_MODEL: ${{ env.OPENAI_MODEL }}
          SYSTEM_PROMPT: ${{ env.SYSTEM_PROMPT }}
          AI_PROMPT: ${{ env.AI_PROMPT }}
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          # Prepare OpenAI chat request payload (embed diff safely)
          jq -n \
            --arg model "$OPENAI_MODEL" \
            --arg sys "$SYSTEM_PROMPT" \
            --arg prompt "$AI_PROMPT" \
            --rawfile diff pr.diff \
            '{model:$model,
              messages:[
                {role:"system", content:$sys},
                {role:"user", content: ($prompt + "\n\n```diff\n" + $diff + "\n```")}
              ]
            }' > payload.json

          # Call OpenAI
          curl -sS https://api.openai.com/v1/chat/completions \
            -H "Authorization: Bearer $OPENAI_API_KEY" \
            -H "Content-Type: application/json" \
            -d @payload.json > response.json

          # Extract response text
          COMMENT=$(jq -r '.choices[0].message.content // empty' response.json)
          if [ -z "$COMMENT" ]; then
            COMMENT="AI did not return a response."
          fi

          # Post the review as a PR comment
          jq -n --arg body "$COMMENT" '{body: ("AI translation check result:\n\n" + $body)}' > body.json
          curl -sS -X POST \
            -H "Authorization: token $GITHUB_TOKEN" \
            -H "Content-Type: application/json" \
            "https://api.github.com/repos/${{ github.repository }}/issues/${{ github.event.pull_request.number }}/comments" \
            --data @body.json