# =============================================================================
# libsmx CI/CD 工作流
# =============================================================================
# 触发条件：
#   - main 分支的 push / PR → lint + test + coverage
#   - v* tag 推送 → 上述全部 + 自动发布
#   - PR → 额外运行 benchmark 并评论结果
# =============================================================================

name: CI

on:
  push:
    branches: [main]
    tags: ["v*"]
  pull_request:
    branches: [main]

# 同一 PR 的新提交自动取消旧的运行，节省 CI 资源
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true

env:
  CARGO_TERM_COLOR: always
  # 强制使用 sparse 协议，加速 crates.io 索引同步
  CARGO_REGISTRIES_CRATES_IO_PROTOCOL: sparse

# =============================================================================
# Job 1: 代码质量检查（格式化 + Clippy + 依赖漏洞扫描）
# =============================================================================
jobs:
  lint:
    name: Lint & Audit
    runs-on: ubuntu-latest
    steps:
      - name: 签出代码
        uses: actions/checkout@v4

      - name: 安装 Rust 工具链（stable + rustfmt + clippy）
        uses: dtolnay/rust-toolchain@stable
        with:
          components: rustfmt, clippy

      - name: 缓存 Cargo 编译产物
        uses: Swatinem/rust-cache@v2

      - name: 检查代码格式
        run: cargo fmt --check

      - name: Clippy 检查（默认 features，所有警告视为错误）
        run: cargo clippy --all-targets -- -D warnings

      - name: Clippy 检查（no_std，无 alloc）
        # Reason: alloc-gated 函数在 no_std 模式下会产生 "unused" 假阳性，
        #         因此只做编译检查，不启用 -D warnings
        run: cargo check --no-default-features

      - name: 安装 cargo-audit
        run: cargo install cargo-audit --locked

      - name: 依赖漏洞扫描（CVE 检查）
        run: cargo audit

      - name: 安全性扫描（panic/unwrap 检查）
        run: bash .github/scripts/sanity_check.sh
        shell: bash

  # =============================================================================
  # Job 2: 多平台测试矩阵
  # =============================================================================
  test-matrix:
    name: Test (${{ matrix.os }})
    needs: lint
    strategy:
      fail-fast: false
      matrix:
        os: [ubuntu-latest, macos-latest, windows-latest]
    runs-on: ${{ matrix.os }}
    steps:
      - name: 签出代码
        uses: actions/checkout@v4

      - name: 安装 Rust 工具链（stable）
        uses: dtolnay/rust-toolchain@stable

      - name: 缓存 Cargo 编译产物
        uses: Swatinem/rust-cache@v2

      # Reason: 在所有平台上显式设置 bash 以统一 Windows/Linux/macOS 行为
      - name: 运行测试（默认 features，全 workspace）
        run: cargo test --workspace --all-targets
        shell: bash

      - name: 运行测试（no_std，无 alloc）
        # Reason: 验证嵌入式 / WASM / 裸机兼容性
        run: cargo test --workspace --no-default-features --lib
        shell: bash

      - name: 运行文档测试
        run: cargo test --doc
        shell: bash

      - name: 构建文档（警告视为错误）
        run: cargo doc --no-deps
        env:
          RUSTDOCFLAGS: "-D warnings"
        shell: bash

  # =============================================================================
  # Job 3: MSRV 验证（最低支持版本）
  # =============================================================================
  msrv:
    name: MSRV (1.83.0)
    needs: lint
    runs-on: ubuntu-latest
    steps:
      - name: 签出代码
        uses: actions/checkout@v4

      - name: 安装 MSRV 工具链
        uses: dtolnay/rust-toolchain@master
        with:
          toolchain: "1.83.0"

      - name: 缓存 Cargo 编译产物
        uses: Swatinem/rust-cache@v2

      # Reason: MSRV 只验证能编译，不运行测试（避免 dev-dependencies 兼容问题）
      - name: 检查编译（默认 features）
        run: cargo check --workspace

      - name: 检查编译（no_std）
        run: cargo check --workspace --no-default-features

  # =============================================================================
  # Job 4: no_std 跨目标编译验证
  # =============================================================================
  no-std:
    name: no_std (${{ matrix.target }})
    needs: lint
    runs-on: ubuntu-latest
    strategy:
      matrix:
        target:
          - thumbv7em-none-eabi    # ARM Cortex-M4，典型嵌入式目标
          - wasm32-unknown-unknown # WebAssembly
    steps:
      - name: 签出代码
        uses: actions/checkout@v4

      - name: 安装 Rust 工具链（stable + 目标平台）
        uses: dtolnay/rust-toolchain@stable
        with:
          targets: ${{ matrix.target }}

      - name: 缓存 Cargo 编译产物
        uses: Swatinem/rust-cache@v2

      # Reason: --no-default-features 禁用 alloc，验证裸机 no_std 兼容性
      - name: 检查 sm3（no_std，无 alloc）
        run: cargo check -p sm3 --target ${{ matrix.target }} --no-default-features

      - name: 检查 sm4（no_std，无 alloc）
        run: cargo check -p sm4 --target ${{ matrix.target }} --no-default-features

      - name: 检查 sm2（no_std，无 alloc）
        run: cargo check -p sm2 --target ${{ matrix.target }} --no-default-features

  # =============================================================================
  # Job 5: Feature Powerset（验证所有 feature 组合均可编译）
  # =============================================================================
  feature-powerset:
    name: Feature Powerset
    needs: lint
    runs-on: ubuntu-latest
    steps:
      - name: 签出代码
        uses: actions/checkout@v4

      - name: 安装 Rust 工具链（stable）
        uses: dtolnay/rust-toolchain@stable

      - name: 缓存 Cargo 编译产物
        uses: Swatinem/rust-cache@v2

      - name: 安装 cargo-hack
        uses: taiki-e/install-action@cargo-hack

      # Reason: 验证所有 feature 组合均能编译，防止 feature 互斥或遗漏依赖
      - name: 检查 sm3 feature powerset
        run: cargo hack check -p sm3 --feature-powerset --no-dev-deps

      - name: 检查 sm4 feature powerset
        run: cargo hack check -p sm4 --feature-powerset --no-dev-deps

      - name: 检查 sm2 feature powerset
        run: cargo hack check -p sm2 --feature-powerset --no-dev-deps

  # =============================================================================
  # Job 6: Miri 内存安全验证
  # =============================================================================
  miri:
    name: Miri
    needs: lint
    runs-on: ubuntu-latest
    steps:
      - name: 签出代码
        uses: actions/checkout@v4

      - name: 安装 Rust nightly + Miri 组件
        uses: dtolnay/rust-toolchain@nightly
        with:
          components: miri

      - name: 缓存 Cargo 编译产物
        uses: Swatinem/rust-cache@v2

      # Reason: 只对纯算法 crate（sm3/sm4/sm2）运行 Miri，
      # 避免对系统调用密集的代码产生误报。
      # -Zmiri-strict-provenance 开启严格指针来源检查。
      - name: Miri 检查 sm3
        run: cargo miri test -p sm3
        env:
          MIRIFLAGS: "-Zmiri-strict-provenance"

      - name: Miri 检查 sm4
        run: cargo miri test -p sm4
        env:
          MIRIFLAGS: "-Zmiri-strict-provenance"

      - name: Miri 检查 sm2（仅单元测试，跳过 alloc 密集测试）
        run: cargo miri test -p sm2 --lib
        env:
          MIRIFLAGS: "-Zmiri-strict-provenance"

  # =============================================================================
  # Job 7: 测试覆盖率（仅 Linux，上传 Codecov）
  # =============================================================================
  coverage:
    name: Coverage
    needs: lint
    runs-on: ubuntu-latest
    steps:
      - name: 签出代码
        uses: actions/checkout@v4

      - name: 安装 Rust 工具链（stable）
        uses: dtolnay/rust-toolchain@stable

      - name: 缓存 Cargo 编译产物
        uses: Swatinem/rust-cache@v2

      - name: 安装 cargo-tarpaulin
        run: cargo install cargo-tarpaulin --locked

      - name: 生成覆盖率报告
        run: cargo tarpaulin --out xml --output-dir coverage/

      - name: 上传覆盖率到 Codecov
        uses: codecov/codecov-action@v4
        with:
          files: coverage/cobertura.xml
          token: ${{ secrets.CODECOV_TOKEN }}
          fail_ci_if_error: false
        # Reason: fail_ci_if_error=false 避免 Codecov 暂时不可用时阻断 CI

  # =============================================================================
  # Job 8: 性能回归检测（仅 PR 触发）
  # =============================================================================
  benchmark:
    name: Benchmark
    if: github.event_name == 'pull_request'
    needs: lint
    runs-on: ubuntu-latest
    permissions:
      pull-requests: write
    steps:
      - name: 签出 PR 代码
        uses: actions/checkout@v4

      - name: 安装 Rust 工具链（stable）
        uses: dtolnay/rust-toolchain@stable

      - name: 缓存 Cargo 编译产物
        uses: Swatinem/rust-cache@v2

      # Reason: 先运行当前 PR 分支的 benchmark 并保存结果
      - name: 运行 Benchmark
        run: cargo bench --bench sm3_bench --bench sm4_bench --bench sm2_bench -- --output-format bencher 2>&1 | tee bench_output.txt
        shell: bash

      # Reason: 将 benchmark 结果作为 PR 评论发布，方便审查性能变化
      - name: 发布 Benchmark 结果到 PR
        uses: actions/github-script@v7
        with:
          script: |
            const fs = require('fs');
            const benchOutput = fs.readFileSync('bench_output.txt', 'utf8');
            const body = `## Benchmark Results\n\n<details>\n<summary>Click to expand</summary>\n\n\`\`\`\n${benchOutput}\n\`\`\`\n\n</details>\n\n> Benchmarks ran on \`ubuntu-latest\`. Results may vary across runs.`;
            await github.rest.issues.createComment({
              owner: context.repo.owner,
              repo: context.repo.repo,
              issue_number: context.issue.number,
              body: body
            });

  # =============================================================================
  # Job 6: 自动发布到 crates.io（仅 v* Tag 触发）
  # =============================================================================
  release:
    name: Release
    if: startsWith(github.ref, 'refs/tags/v')
    needs: [test-matrix, msrv]
    runs-on: ubuntu-latest
    permissions:
      contents: write
    steps:
      - name: 签出代码
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: 安装 Rust 工具链（stable）
        uses: dtolnay/rust-toolchain@stable

      - name: 缓存 Cargo 编译产物
        uses: Swatinem/rust-cache@v2

      # Reason: 确保 Git Tag 版本号与 Cargo.toml 中的 version 字段完全一致
      - name: 验证 Tag 与 Cargo.toml 版本匹配
        run: |
          TAG_VERSION="${GITHUB_REF_NAME#v}"
          CARGO_VERSION=$(grep '^version' Cargo.toml | head -1 | sed 's/.*"\(.*\)".*/\1/')
          if [ "$TAG_VERSION" != "$CARGO_VERSION" ]; then
            echo "::error::Tag version ($TAG_VERSION) does not match Cargo.toml version ($CARGO_VERSION)"
            exit 1
          fi
          echo "Version: $TAG_VERSION ✓"
        shell: bash

      # Reason: 发布前最后一轮完整测试，防止 tag 推送后才发现问题
      - name: 发布前完整测试
        run: cargo test --all-targets

      - name: 发布到 crates.io
        run: cargo publish
        env:
          CARGO_REGISTRY_TOKEN: ${{ secrets.CARGO_REGISTRY_TOKEN }}

      # Reason: 从 CHANGELOG.md 中提取当前版本的发布说明
      - name: 提取 Changelog 条目
        id: changelog
        run: |
          TAG_VERSION="${GITHUB_REF_NAME#v}"
          # 提取 ## [x.y.z] 到下一个 ## 之间的内容
          NOTES=$(awk "/^## \\[${TAG_VERSION}\\]/{found=1; next} /^## \\[/{if(found) exit} found{print}" CHANGELOG.md)
          if [ -z "$NOTES" ]; then
            NOTES="Release v${TAG_VERSION}"
          fi
          # 写入多行输出
          echo "notes<<EOF" >> $GITHUB_OUTPUT
          echo "$NOTES" >> $GITHUB_OUTPUT
          echo "EOF" >> $GITHUB_OUTPUT
        shell: bash

      - name: 创建 GitHub Release
        uses: softprops/action-gh-release@v2
        with:
          name: "v${{ github.ref_name }}"
          body: ${{ steps.changelog.outputs.notes }}
          draft: false
          prerelease: ${{ contains(github.ref_name, '-') }}
        # Reason: 如果 tag 包含 '-'（如 v0.4.0-rc1），标记为预发布