name: Test pg_mentat (Nix)

on:
  push:
    branches: [main, claude, develop]
  pull_request:
    branches: [main, claude]
  workflow_dispatch:

jobs:
  test:
    name: Build and Test
    runs-on: ubuntu-latest

    steps:
      - uses: actions/checkout@v4
        with:
          submodules: recursive

      - uses: cachix/install-nix-action@v27
        with:
          extra_nix_config: |
            experimental-features = nix-command flakes

      - name: Cache Nix store
        uses: nix-community/cache-nix-action@v6
        with:
          primary-key: nix-${{ runner.os }}-${{ hashFiles('flake.lock') }}
          restore-prefixes-first-match: nix-${{ runner.os }}-

      - name: Show flake metadata
        run: nix flake metadata

      - name: Enter dev shell and run tests
        run: |
          nix develop --command bash -c '
            set -euo pipefail

            echo "=== Environment ==="
            rustc --version
            cargo --version
            pg_config --version
            echo "LIBCLANG_PATH=$LIBCLANG_PATH"

            echo "=== Installing cargo-pgrx ==="
            cargo install --locked cargo-pgrx --version "~0.17"

            # cargo pgrx test installs the extension into
            # \$(pg_config --sharedir)/extension. The nix-store PostgreSQL is
            # read-only there, so init a pgrx-managed PostgreSQL (writable
            # under ~/.pgrx) for the test run instead of the nix pg_config.
            # The dev shell already provides the PG build deps.
            echo "=== Initializing a writable pgrx-managed PG16 ==="
            cargo pgrx init --pg16 download

            echo "=== Running tests ==="
            (cd crates/pg/pg_mentat && cargo pgrx test --no-default-features --features pg16 pg16)
          '

      - name: Generate test report
        if: always()
        run: |
          echo "## Test Results (Nix)" >> "$GITHUB_STEP_SUMMARY"
          echo "" >> "$GITHUB_STEP_SUMMARY"
          echo "- **Date**: $(date -u)" >> "$GITHUB_STEP_SUMMARY"
          echo "- **Commit**: ${{ github.sha }}" >> "$GITHUB_STEP_SUMMARY"
          echo "- **Branch**: ${{ github.ref_name }}" >> "$GITHUB_STEP_SUMMARY"
          echo "- **Runner**: Nix flake dev shell" >> "$GITHUB_STEP_SUMMARY"

      - name: Upload test artifacts
        if: failure()
        uses: actions/upload-artifact@v4
        with:
          name: nix-test-failure-logs
          path: |
            crates/pg/pg_mentat/target/pgrx-test-data-*/
          retention-days: 7

  build-package:
    name: Build Extension Package
    runs-on: ubuntu-latest

    steps:
      - uses: actions/checkout@v4
        with:
          submodules: recursive

      - uses: cachix/install-nix-action@v27
        with:
          extra_nix_config: |
            experimental-features = nix-command flakes

      - name: Cache Nix store
        uses: nix-community/cache-nix-action@v6
        with:
          primary-key: nix-${{ runner.os }}-${{ hashFiles('flake.lock') }}
          restore-prefixes-first-match: nix-${{ runner.os }}-

      # Use the dev shell to build the extension package.  The flake's
      # packages.default derivation needs network access (cargo fetches)
      # which is incompatible with the Nix sandbox on most CI runners.
      # Building inside `nix develop` avoids that problem entirely.
      - name: Build extension package
        run: |
          nix develop --command bash -c '
            set -euo pipefail
            setup-pgrx
            build-extension
          '

      - name: List build outputs
        run: |
          echo "## Build Outputs" >> "$GITHUB_STEP_SUMMARY"
          echo '```' >> "$GITHUB_STEP_SUMMARY"
          find crates/pg/pg_mentat/target -name "pg_mentat.so" -o -name "*.control" -o -name "*.sql" 2>/dev/null | sort >> "$GITHUB_STEP_SUMMARY"
          echo '```' >> "$GITHUB_STEP_SUMMARY"

      - name: Upload extension artifact
        uses: actions/upload-artifact@v4
        with:
          name: pg_mentat-extension
          path: |
            crates/pg/pg_mentat/target/release/pg_mentat-pg16/
          retention-days: 30

  lint:
    name: Lint and Format
    runs-on: ubuntu-latest

    steps:
      - uses: actions/checkout@v4
        with:
          submodules: recursive

      - uses: cachix/install-nix-action@v27
        with:
          extra_nix_config: |
            experimental-features = nix-command flakes

      - name: Cache Nix store
        uses: nix-community/cache-nix-action@v6
        with:
          primary-key: nix-${{ runner.os }}-${{ hashFiles('flake.lock') }}
          restore-prefixes-first-match: nix-${{ runner.os }}-

      - name: Check formatting
        run: |
          nix develop --command bash -c 'cargo fmt --all -- --check'

      - name: Run clippy
        # Match the canonical clippy gate (the GitHub `ci` job): production
        # code, the pg16 feature, no --all-targets. clippy on a pgrx crate
        # still builds pgrx-pg-sys, which needs PGRX_HOME, so setup-pgrx must
        # run first. (Test-target clippy debt under --all-targets is a
        # separate cleanup, not enforced by the project's primary CI.)
        run: |
          nix develop --command bash -c '
            setup-pgrx
            cargo clippy --no-default-features --features pg16 -p pg_mentat -- -D warnings
          '