name: Security

on:
  push:
    branches: [main]
  pull_request:
    branches: [main]
  schedule:
    - cron: '0 6 * * 1'

permissions:
  contents: read
  security-events: write

jobs:
  codeql:
    name: CodeQL Analysis
    runs-on: ubuntu-latest
    # CodeQL requires GitHub Advanced Security (free for public repos only)
    continue-on-error: true

    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Set up JDK
        uses: actions/setup-java@v4
        with:
          distribution: 'temurin'
          java-version: '17'

      - name: Initialize CodeQL
        uses: github/codeql-action/init@v3
        with:
          languages: java-kotlin

      - name: Cache Gradle
        uses: actions/cache@v4
        with:
          path: |
            ~/.gradle/caches
            ~/.gradle/wrapper
          key: gradle-${{ runner.os }}-${{ hashFiles('**/*.gradle', '**/gradle-wrapper.properties') }}
          restore-keys: gradle-${{ runner.os }}-

      - name: Build for CodeQL
        run: ./gradlew assembleDebug -x test -x lint
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

      - name: Perform CodeQL Analysis
        uses: github/codeql-action/analyze@v3

  dependency-review:
    name: Dependency Review
    runs-on: ubuntu-latest
    if: github.event_name == 'pull_request'

    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Dependency Review
        uses: actions/dependency-review-action@v4
        with:
          fail-on-severity: critical
          deny-licenses: GPL-3.0, AGPL-3.0

  secret-scan:
    name: Secret Scan
    runs-on: ubuntu-latest

    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: TruffleHog Secret Scan
        uses: trufflesecurity/trufflehog@main
        with:
          path: ./
          base: ${{ github.event.repository.default_branch }}
          extra_args: --only-verified

  hardcoded-secrets:
    name: Hardcoded Secret Detection
    runs-on: ubuntu-latest

    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Scan for hardcoded secrets
        run: |
          FOUND=0

          echo "Checking for seed phrases / mnemonics..."
          if grep -rn --include="*.kt" --include="*.java" --include="*.xml" -iE "(mnemonic|seed_phrase)\s*=\s*\"[a-z]+" . | grep -v /build/ | grep -v /test/ | grep -v /androidTest/ | grep -v "R.string" | grep -v "getString"; then
            echo "::error::Possible seed phrase found in source"
            FOUND=1
          fi

          echo "Checking for private keys..."
          if grep -rn --include="*.kt" --include="*.java" -E "(private_key|privateKey|secret)\s*=\s*\"0x[a-fA-F0-9]{64}\"" . | grep -v /build/ | grep -v /test/ | grep -v /androidTest/; then
            echo "::error::Possible private key found in source"
            FOUND=1
          fi

          echo "Checking for API keys in source..."
          if grep -rn --include="*.kt" --include="*.java" -iE "(api_key|apikey|secret_key|password)\s*=\s*\"[^\"]{16,}" . | grep -v /build/ | grep -v /test/ | grep -v /androidTest/ | grep -v BuildConfig | grep -v "process"; then
            echo "::error::Possible API key or password found in source"
            FOUND=1
          fi

          if [ "$FOUND" -eq 0 ]; then
            echo "No hardcoded secrets found."
          else
            exit 1
          fi