name: 'Codex CLI'
description: 'Codex CLI 工具'
author: 'Jeffery'
inputs:
  prompt:
    description: '傳給 Codex CLI 的提示詞'
    required: false
    default: "請自我介紹"
  oauth:
    description: 'base64 編碼的 Codex OAuth token 檔案內容'
    required: true
outputs:
  text:
    description: '輸出的文字'
    value: ${{ steps.codex.outputs.text }}
  email:
    description: '目前登入帳號的電子郵件（取自 OAuth id_token）'
    value: ${{ steps.codex.outputs.email }}
runs:
  using: 'composite'
  steps:
  - name: 安裝工具
    env:
      OAUTH: ${{ inputs.oauth }}
    run: |
      npm install -g @openai/codex

      oauth_file="$HOME/.codex/auth.json"
      install -d -m 700 "$(dirname "$oauth_file")"
      printf '%s' "$OAUTH" | base64 -d > "$oauth_file"
      chmod 600 "$oauth_file"
    shell: bash
  - name: 執行工具
    id: codex
    env:
      MODEL: ${{ vars.CODEX_MODEL }}
      PROMPT: ${{ inputs.prompt }}
    run: |
      if [ -z "$MODEL" ]; then
        echo 'CODEX_MODEL repository variable is required.' >&2
        exit 1
      fi

      text="$(codex exec --skip-git-repo-check -s danger-full-access --model "$MODEL" "$PROMPT")"
      printf '%s\n' "$text"

      # 從 OAuth id_token（JWT）解出目前登入帳號的 email；正規表示式對冒號後空白容錯
      auth_file="$HOME/.codex/auth.json"
      id_token="$(grep -oE -m1 '"id_token"[[:space:]]*:[[:space:]]*"[^"]*"' "$auth_file" | sed -E 's/.*:[[:space:]]*"//; s/"$//' || true)"
      payload="$(printf '%s' "$id_token" | cut -d. -f2 | tr '_-' '/+')"
      case $((${#payload} % 4)) in
        2) payload="${payload}==" ;;
        3) payload="${payload}=" ;;
      esac
      email="$(printf '%s' "$payload" | base64 -d 2>/dev/null | grep -oE -m1 '"email"[[:space:]]*:[[:space:]]*"[^"]*"' | sed -E 's/.*:[[:space:]]*"//; s/"$//' || true)"

      {
        echo 'text<<CODEX_OUTPUT'
        printf '%s\n' "$text"
        echo 'CODEX_OUTPUT'
        echo "email=$email"
      } >> "$GITHUB_OUTPUT"
    shell: bash