#!/bin/bash
# CI Unit Tests Job 主脚本
# 包含：依赖安装、增量测试选择、覆盖率测试、diff覆盖率门禁
set -eu

# 测试环境必须的密钥变量
export JWT_SECRET_KEY=${JWT_SECRET_KEY:-test-jwt-secret-for-ci-only-2026}

JOB_NAME="${1:-Unit Tests}"

echo "=== CI Unit Tests 开始 ==="

# --- 配置 pip 国内源（加速下载，减少网络失败）---
python3 -m pip config set global.index-url https://mirrors.aliyun.com/pypi/simple/
python3 -m pip config set global.timeout 120
python3 -m pip config set global.retries 5

# --- 安装依赖 ---
echo ""
echo "=== 安装 Python 依赖 ==="
# pip install 带重试（网络不稳定时自动重试）
for i in 1 2 3; do
  python3 -m pip install -q -r requirements-base.txt && break
  echo "pip install requirements-base.txt 失败，重试 $i/3..."
  [ $i -eq 3 ] && exit 1
  sleep 5
done
for i in 1 2 3; do
  python3 -m pip install -q -r requirements.txt && break
  echo "pip install requirements.txt 失败，重试 $i/3..."
  [ $i -eq 3 ] && exit 1
  sleep 5
done
for i in 1 2 3; do
  python3 -m pip install -q -r requirements-worker.txt && break
  echo "pip install requirements-worker.txt 失败，重试 $i/3..."
  [ $i -eq 3 ] && exit 1
  sleep 5
done
for i in 1 2 3; do
  python3 -m pip install -q -r requirements-dev.txt && break
  echo "pip install requirements-dev.txt 失败，重试 $i/3..."
  [ $i -eq 3 ] && exit 1
  sleep 5
done
pytest --version

# --- 安装 ffmpeg（视频处理相关测试依赖）---
bash scripts/ci/step_install_ffmpeg.sh

# 双保险：确保numpy已安装
python3 -m pip install -q numpy==1.26.4 || true

# --- 增量测试选择（仅PR） ---
UNIT_TEST_MODE="full"
SELECTED_TEST_FILES="tests/unit"

if [ "${GITHUB_EVENT_NAME:-}" = "pull_request" ] && [ -n "${GITHUB_TOKEN:-}" ]; then
  echo ""
  echo "=== 增量测试选择 ==="
  PR_NUMBER=$(echo "$GITHUB_REF" | sed 's|refs/pull/||; s|/.*||')
  API_URL="${GITHUB_API_URL}/repos/${GITHUB_REPOSITORY}/pulls/${PR_NUMBER}/files?limit=300"
  CHANGED_FILES=$(curl -s -H "Authorization: token ${GITHUB_TOKEN}" "$API_URL" | python3 -c "import sys,json; [print(f['filename']) for f in json.load(sys.stdin) if f['status'] != 'removed']")
  echo "改动文件数: $(echo "$CHANGED_FILES" | grep -c . || echo 0)"
  set +e
  CHANGED_FILES="$CHANGED_FILES" \
  SELECTED_TESTS_OUTPUT=/tmp/selected_tests.txt \
  python3 scripts/ci/select_unit_tests.py
  SELECT_EXIT=$?
  set -e
  if [ $SELECT_EXIT -eq 0 ]; then
    UNIT_TEST_MODE="incremental"
    TEST_FILES=$(cat /tmp/selected_tests.txt | tr '\n' ' ')
    SELECTED_TEST_FILES="$TEST_FILES"
    echo "增量模式: $(cat /tmp/selected_tests.txt | wc -l) 个测试文件"
  else
    echo "全量模式"
  fi
fi

# --- 运行单元测试 + 覆盖率 ---
echo ""
echo "=== 运行单元测试 (模式: $UNIT_TEST_MODE) ==="

if [ "$UNIT_TEST_MODE" = "incremental" ]; then
  echo "=== 增量测试模式 ==="
  PYTHONPATH="$PWD/apps/api:$PWD/apps/worker:$PWD/packages:$PWD" python3 -m coverage run \
    --source=apps/api/app,apps/worker/worker_app,packages \
    --omit="*/migrations/*,*/tests/*,*/test_*.py,*/site-packages/*" \
    --branch \
    -m pytest $SELECTED_TEST_FILES -q
  python3 -m coverage report --show-missing
  python3 -m coverage xml -o coverage.xml
  python3 -m coverage report --fail-under=10 > /dev/null || true
else
  PYTHONPATH="$PWD/apps/api:$PWD/apps/worker:$PWD/packages:$PWD" python3 -m coverage run \
    --source=apps/api/app,apps/worker/worker_app,packages \
    --omit="*/migrations/*,*/tests/*,*/test_*.py,*/site-packages/*" \
    --branch \
    -m pytest tests/unit -q
  python3 -m coverage report --show-missing
  python3 -m coverage xml -o coverage.xml
  python3 -m coverage report --fail-under=65 > /dev/null
fi

# --- Diff 覆盖率检查（仅PR） ---
if [ "${GITHUB_EVENT_NAME:-}" = "pull_request" ] && [ -n "${GITHUB_TOKEN:-}" ]; then
  echo ""
  echo "=== Diff 覆盖率检查 ==="
  BASE_BRANCH="${GITHUB_BASE_REF:-develop}"
  echo "Base branch: $BASE_BRANCH"

  PR_CODE_DIR="/tmp/pr-code-$$"
  mkdir -p "$PR_CODE_DIR"
  # 备份PR代码（含coverage.xml，diff-cover需要用到
  find . -maxdepth 1 -mindepth 1 ! -name 'diff_coverage.html' -exec cp -r {} "$PR_CODE_DIR/" \;
  rm -rf .git
  git init > /dev/null 2>&1
  git remote add origin https://git.xiaoxiajianji.com/xiaoxia/xiaoxia-saas.git > /dev/null 2>&1
  git config user.email "ci@local"
  git config user.name "CI"
  git fetch origin "$BASE_BRANCH" --depth=200
  # 先清理工作目录，避免未跟踪文件导致checkout失败
  find . -mindepth 1 -maxdepth 1 ! -name '.git' -exec rm -rf {} +
  git checkout -b ci-pr-branch "origin/$BASE_BRANCH" > /dev/null 2>&1
  # 清除base分支源码，用PR代码覆盖
  find . -mindepth 1 -maxdepth 1 ! -name '.git' -exec rm -rf {} +
  cp -r "$PR_CODE_DIR"/. .
  rm -rf "$PR_CODE_DIR"
  git add -A > /dev/null 2>&1
  git commit -m "ci-tmp" > /dev/null 2>&1

  if [ "$UNIT_TEST_MODE" = "incremental" ]; then
    THRESHOLD=40
    echo "增量测试模式，增量覆盖率门槛: ${THRESHOLD}%"
  else
    THRESHOLD=60
    echo "全量测试模式，增量覆盖率门槛: ${THRESHOLD}%"
  fi

  set +e
  python3 -m diff_cover.diff_cover_tool coverage.xml \
    --compare-branch="origin/$BASE_BRANCH" \
    --fail-under=$THRESHOLD \
    --html-report diff_coverage.html \
    2>&1
  DIFF_EXIT=$?
  set -e
  if [ $DIFF_EXIT -ne 0 ]; then
    echo ""
    echo "❌ 增量覆盖率未达到门槛 (${THRESHOLD}%)"
    echo "   请为改动的代码添加单元测试后再提交"
    echo ""
    echo "=== 覆盖率报告 ==="
    python3 -m diff_cover.diff_cover_tool coverage.xml \
      --compare-branch="origin/$BASE_BRANCH" 2>&1 | tail -30
    exit 1
  fi
  echo "✅ 增量覆盖率达标"
fi

echo ""
echo "=== CI Unit Tests 全部通过 ✅ ==="