#!/bin/bash
# Coverage rate report generator for gochat project
# Generates per-package and overall coverage metrics aligned with Chatwoot test patterns.
set -e

cd "$(dirname "$0")/.."
export GOPROXY=https://goproxy.cn,direct
export GONOSUMCHECK=*
export GONOSUMDB=*
export GOFLAGS=-mod=mod

REPORT_DIR="coverage_reports"
mkdir -p "$REPORT_DIR"

echo "=== GoChat Test Coverage Report ==="
echo "Generated: $(date)"
echo ""

# Packages to test (only those that compile cleanly)
TESTABLE_PKGS=(
    "./internal/model"
    "./internal/model/channel"
    "./internal/auth"
    "./internal/config"
    "./pkg/testutil"
    "./pkg/crypto"
    "./internal/repository"
    "./internal/pubsub"
)

TOTAL_COVERAGE=0
PKG_COUNT=0
PASS_COUNT=0
FAIL_COUNT=0
TOTAL_TESTS=0
TOTAL_ASSERTIONS=0

echo "| Package | Tests | Coverage | Status |"
echo "|---------|-------|----------|--------|"

for pkg in "${TESTABLE_PKGS[@]}"; do
    COVERAGE_FILE="$REPORT_DIR/coverage_$(echo $pkg | tr '/' '_').out"
    
    # Run tests with coverage
    RESULT=$(go test -v -cover -coverprofile="$COVERAGE_FILE" "$pkg" 2>&1)
    EXIT_CODE=$?
    
    # Extract coverage percentage
    COVERAGE=$(echo "$RESULT" | grep "coverage:" | awk '{print $2}' | sed 's/%//')
    if [ -z "$COVERAGE" ]; then
        COVERAGE="0.0"
    fi
    
    # Count tests
    TEST_COUNT=$(echo "$RESULT" | grep -c "^--- PASS\|^--- FAIL" || echo 0)
    
    # Determine status
    if [ $EXIT_CODE -eq 0 ]; then
        STATUS="PASS"
        PASS_COUNT=$((PASS_COUNT+1))
    else
        STATUS="FAIL"
        FAIL_COUNT=$((FAIL_COUNT+1))
    fi
    
    echo "| $pkg | $TEST_COUNT | ${COVERAGE}% | $STATUS |"
    
    TOTAL_TESTS=$((TOTAL_TESTS+TEST_COUNT))
    TOTAL_COVERAGE=$(echo "$TOTAL_COVERAGE + $COVERAGE" | bc)
    PKG_COUNT=$((PKG_COUNT+1))
done

echo ""
echo "=== Summary ==="
echo "Total packages tested: $PKG_COUNT"
echo "Passed: $PASS_COUNT, Failed: $FAIL_COUNT"
echo "Total test functions: $TOTAL_TESTS"

if [ $PKG_COUNT -gt 0 ]; then
    AVG_COVERAGE=$(echo "$TOTAL_COVERAGE / $PKG_COUNT" | bc -l)
    echo "Average coverage: ${AVG_COVERAGE}%"
fi

echo ""
echo "=== Test File Inventory ==="
find . -name "*_test.go" -not -path "./vendor/*" | while read f; do
    LINES=$(wc -l < "$f")
    FUNCTIONS=$(grep -c "func Test" "$f" 2>/dev/null || echo 0)
    echo "  $f: ${LINES} lines, ${FUNCTIONS} test functions"
done

echo ""
echo "Coverage profiles saved to $REPORT_DIR/"
echo "To view HTML coverage: go tool cover -html=$REPORT_DIR/coverage_*.out"