name: CI

on:
  push:
    branches: [main, master, dev]
  pull_request:
    branches: [main, master]

env:
  CARGO_TERM_COLOR: always
  RUSTFLAGS: "-Dwarnings"

jobs:
  # ── Lint ─────────────────────────────────────────────────────────────────────
  lint:
    name: Lint (fmt + clippy)
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4

      - name: Install Rust toolchain
        uses: dtolnay/rust-toolchain@stable
        with:
          components: rustfmt, clippy

      - name: Cache cargo registry & build
        uses: actions/cache@v4
        with:
          path: |
            ~/.cargo/registry
            ~/.cargo/git
            target
          key: ${{ runner.os }}-cargo-lint-${{ hashFiles('**/Cargo.lock') }}
          restore-keys: ${{ runner.os }}-cargo-lint-

      - name: Check formatting
        run: cargo fmt --all -- --check

      - name: Clippy lints
        run: cargo clippy --all-targets --all-features -- -D warnings

  # ── Test ─────────────────────────────────────────────────────────────────────
  test:
    name: Test (${{ matrix.os }})
    runs-on: ${{ matrix.os }}
    strategy:
      fail-fast: false
      matrix:
        os: [ubuntu-latest, macos-latest]
        rust: [stable]
        include:
          - os: ubuntu-latest
            rust: nightly

    steps:
      - uses: actions/checkout@v4

      - name: Install Rust toolchain
        uses: dtolnay/rust-toolchain@master
        with:
          toolchain: ${{ matrix.rust }}

      - name: Cache cargo registry & build
        uses: actions/cache@v4
        with:
          path: |
            ~/.cargo/registry
            ~/.cargo/git
            target
          key: ${{ runner.os }}-${{ matrix.rust }}-cargo-test-${{ hashFiles('**/Cargo.lock') }}
          restore-keys: ${{ runner.os }}-${{ matrix.rust }}-cargo-test-

      - name: Run tests
        run: cargo test --all-features --verbose

  # ── Coverage ─────────────────────────────────────────────────────────────────
  coverage:
    name: Coverage
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4

      - name: Install Rust toolchain
        uses: dtolnay/rust-toolchain@stable

      - name: Install cargo-tarpaulin
        run: cargo install cargo-tarpaulin

      - name: Cache cargo registry & build
        uses: actions/cache@v4
        with:
          path: |
            ~/.cargo/registry
            ~/.cargo/git
            target
          key: ${{ runner.os }}-cargo-cov-${{ hashFiles('**/Cargo.lock') }}
          restore-keys: ${{ runner.os }}-cargo-cov-

      - name: Generate coverage
        run: cargo tarpaulin --out xml --output-dir coverage --all-features --workspace --timeout 120

      - name: Upload to Codecov
        uses: codecov/codecov-action@v4
        with:
          files: coverage/cobertura.xml
          fail_ci_if_error: false
          token: ${{ secrets.CODECOV_TOKEN }}

  # ── Build ────────────────────────────────────────────────────────────────────
  build:
    name: Build (${{ matrix.os }})
    runs-on: ${{ matrix.os }}
    strategy:
      fail-fast: false
      matrix:
        os: [ubuntu-latest, macos-latest]

    steps:
      - uses: actions/checkout@v4

      - name: Install Rust toolchain
        uses: dtolnay/rust-toolchain@stable

      - name: Cache cargo registry & build
        uses: actions/cache@v4
        with:
          path: |
            ~/.cargo/registry
            ~/.cargo/git
            target
          key: ${{ runner.os }}-cargo-build-${{ hashFiles('**/Cargo.lock') }}
          restore-keys: ${{ runner.os }}-cargo-build-

      - name: Build release binary
        run: cargo build --release --verbose

      - name: Check binary size
        run: |
          ls -lh target/release/fetchx
          echo "Binary size: $(du -h target/release/fetchx | cut -f1)"

      - name: Upload binary artifact
        uses: actions/upload-artifact@v4
        with:
          name: fetchx-${{ matrix.os }}
          path: target/release/fetchx
          retention-days: 7