#!/bin/bash
# RFCP Frontend-Backend Integration Test
# Tests API endpoints that frontend uses
# Usage: ./rfcp-integration-test.sh [base_url]

BASE_URL="${1:-https://api.rfcp.eliah.one}"
PASSED=0
FAILED=0

# Colors
GREEN='\033[0;32m'
RED='\033[0;31m'
YELLOW='\033[1;33m'
CYAN='\033[0;36m'
NC='\033[0m'

echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
echo "  RFCP Integration Test (Frontend ↔ Backend)"
echo "  Target: $BASE_URL"
echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
echo ""

test_endpoint() {
    local name="$1"
    local method="$2"
    local endpoint="$3"
    local expected="$4"
    local data="$5"
    
    if [ "$method" == "GET" ]; then
        response=$(curl -s -w "\n%{http_code}" "$BASE_URL$endpoint")
    else
        response=$(curl -s -w "\n%{http_code}" -X "$method" "$BASE_URL$endpoint" \
            -H "Content-Type: application/json" \
            -d "$data")
    fi
    
    http_code=$(echo "$response" | tail -n1)
    body=$(echo "$response" | sed '$d')
    
    if [ "$http_code" == "200" ] && echo "$body" | grep -q "$expected"; then
        echo -e "${GREEN}✓${NC} $name"
        ((PASSED++))
        return 0
    else
        echo -e "${RED}✗${NC} $name (HTTP $http_code)"
        echo "  Expected: $expected"
        echo "  Got: ${body:0:100}..."
        ((FAILED++))
        return 1
    fi
}

# ═══════════════════════════════════════════════════
# Core API Tests
# ═══════════════════════════════════════════════════
echo -e "${CYAN}Core API${NC}"
echo "─────────────────────────────────────────────────"

test_endpoint "Health check" "GET" "/api/health/" '"status":"ok"'
test_endpoint "Database connection" "GET" "/api/health/db" '"database":"connected"'
test_endpoint "API version" "GET" "/" '"version"'

echo ""

# ═══════════════════════════════════════════════════
# Project API (state persistence)
# ═══════════════════════════════════════════════════
echo -e "${CYAN}Project API${NC}"
echo "─────────────────────────────────────────────────"

test_endpoint "Get project" "GET" "/api/projects/current" '"name":"global"'
test_endpoint "Get settings" "GET" "/api/projects/current/settings" '"radius"'

# Save test site
test_endpoint "Save sites" "PUT" "/api/projects/current/sites" '"updated"' \
    '[{"id":"integration-test","name":"Integration Test Site","lat":48.46,"lon":35.05,"height":30,"power":43}]'

# Verify saved
test_endpoint "Verify sites" "GET" "/api/projects/current/sites" "Integration Test Site"

echo ""

# ═══════════════════════════════════════════════════
# Coverage API (main functionality)
# ═══════════════════════════════════════════════════
echo -e "${CYAN}Coverage API${NC}"
echo "─────────────────────────────────────────────────"

# Presets
test_endpoint "Get presets" "GET" "/api/coverage/presets" '"fast"'

# Coverage calculation
echo -n "Coverage calculation (fast)... "
start=$(date +%s)
calc_response=$(curl -s -X POST "$BASE_URL/api/coverage/calculate" \
    -H "Content-Type: application/json" \
    -d '{
        "sites": [{"lat": 48.46, "lon": 35.05, "height": 30, "power": 43, "gain": 15, "frequency": 1800}],
        "settings": {"radius": 1000, "resolution": 100, "preset": "fast"}
    }')
end=$(date +%s)

# Validate response structure
has_points=$(echo "$calc_response" | jq 'has("points")')
has_stats=$(echo "$calc_response" | jq 'has("stats")')
has_time=$(echo "$calc_response" | jq 'has("computation_time")')
has_models=$(echo "$calc_response" | jq 'has("models_used")')
point_count=$(echo "$calc_response" | jq '.count')

if [ "$has_points" == "true" ] && [ "$has_stats" == "true" ] && [ "$has_time" == "true" ] && [ "$has_models" == "true" ] && [ "$point_count" -gt 0 ]; then
    echo -e "${GREEN}✓${NC} Coverage calculation ($point_count points, $((end-start))s)"
    ((PASSED++))
else
    echo -e "${RED}✗${NC} Coverage calculation - missing fields or no points"
    ((FAILED++))
fi

# Response structure check
echo -n "Response structure... "
min_rsrp=$(echo "$calc_response" | jq '.stats.min_rsrp')
max_rsrp=$(echo "$calc_response" | jq '.stats.max_rsrp')
models=$(echo "$calc_response" | jq -r '.models_used[]' | head -1)

if [ "$min_rsrp" != "null" ] && [ "$max_rsrp" != "null" ] && [ -n "$models" ]; then
    echo -e "${GREEN}✓${NC} Response structure valid"
    echo "    RSRP: $min_rsrp to $max_rsrp dBm"
    echo "    Models: $(echo "$calc_response" | jq -r '.models_used | join(", ")')"
    ((PASSED++))
else
    echo -e "${RED}✗${NC} Invalid response structure"
    ((FAILED++))
fi

# Buildings endpoint
test_endpoint "Get buildings" "GET" "/api/coverage/buildings?min_lat=48.455&min_lon=35.045&max_lat=48.465&max_lon=35.055" '"count"'

echo ""

# ═══════════════════════════════════════════════════
# Terrain API
# ═══════════════════════════════════════════════════
echo -e "${CYAN}Terrain API${NC}"
echo "─────────────────────────────────────────────────"

test_endpoint "Get elevation" "GET" "/api/terrain/elevation?lat=48.46&lon=35.05" '"elevation"'

# Elevation profile
echo -n "Elevation profile... "
profile_response=$(curl -s "$BASE_URL/api/terrain/profile?lat1=48.46&lon1=35.05&lat2=48.47&lon2=35.06&points=10")
profile_count=$(echo "$profile_response" | jq '.profile | length')

if [ "$profile_count" -eq 10 ]; then
    echo -e "${GREEN}✓${NC} Elevation profile ($profile_count points)"
    ((PASSED++))
else
    echo -e "${RED}✗${NC} Elevation profile (expected 10, got $profile_count)"
    ((FAILED++))
fi

# LoS check
test_endpoint "Line of Sight" "GET" "/api/terrain/los?tx_lat=48.46&tx_lon=35.05&tx_height=30&rx_lat=48.47&rx_lon=35.06" '"has_los"'

# Fresnel check
test_endpoint "Fresnel clearance" "GET" "/api/terrain/fresnel?tx_lat=48.46&tx_lon=35.05&tx_height=30&rx_lat=48.47&rx_lon=35.06&rx_height=1.5&frequency=1800" '"clearance_percent"'

echo ""

# ═══════════════════════════════════════════════════
# Error Handling
# ═══════════════════════════════════════════════════
echo -e "${CYAN}Error Handling${NC}"
echo "─────────────────────────────────────────────────"

# Invalid coordinates
echo -n "Invalid coordinates... "
error_response=$(curl -s -o /dev/null -w "%{http_code}" "$BASE_URL/api/terrain/elevation?lat=999&lon=999")
if [ "$error_response" == "422" ] || [ "$error_response" == "400" ]; then
    echo -e "${GREEN}✓${NC} Returns error for invalid coords (HTTP $error_response)"
    ((PASSED++))
else
    echo -e "${YELLOW}⚠${NC} Unexpected response: HTTP $error_response"
fi

# Empty sites
echo -n "Empty sites array... "
empty_response=$(curl -s -X POST "$BASE_URL/api/coverage/calculate" \
    -H "Content-Type: application/json" \
    -d '{"sites": [], "settings": {"radius": 1000, "resolution": 100}}')
empty_code=$(curl -s -o /dev/null -w "%{http_code}" -X POST "$BASE_URL/api/coverage/calculate" \
    -H "Content-Type: application/json" \
    -d '{"sites": [], "settings": {"radius": 1000, "resolution": 100}}')

if [ "$empty_code" == "400" ]; then
    echo -e "${GREEN}✓${NC} Rejects empty sites (HTTP 400)"
    ((PASSED++))
else
    echo -e "${YELLOW}⚠${NC} Should reject empty sites (got HTTP $empty_code)"
fi

# Too large radius
echo -n "Radius limit... "
large_response=$(curl -s -o /dev/null -w "%{http_code}" -X POST "$BASE_URL/api/coverage/calculate" \
    -H "Content-Type: application/json" \
    -d '{"sites": [{"lat": 48.46, "lon": 35.05, "height": 30, "power": 43, "gain": 15, "frequency": 1800}], "settings": {"radius": 100000, "resolution": 100}}')

if [ "$large_response" == "400" ]; then
    echo -e "${GREEN}✓${NC} Rejects >50km radius (HTTP 400)"
    ((PASSED++))
else
    echo -e "${YELLOW}⚠${NC} Should limit radius (got HTTP $large_response)"
fi

echo ""

# ═══════════════════════════════════════════════════
# Performance Check
# ═══════════════════════════════════════════════════
echo -e "${CYAN}Performance${NC}"
echo "─────────────────────────────────────────────────"

echo -n "Fast preset timing... "
start=$(date +%s.%N)
curl -s -X POST "$BASE_URL/api/coverage/calculate" \
    -H "Content-Type: application/json" \
    -d '{"sites": [{"lat": 48.46, "lon": 35.05, "height": 30, "power": 43, "gain": 15, "frequency": 1800}], "settings": {"radius": 2000, "resolution": 100, "preset": "fast"}}' > /dev/null
end=$(date +%s.%N)
duration=$(echo "$end - $start" | bc)

if (( $(echo "$duration < 5" | bc -l) )); then
    echo -e "${GREEN}✓${NC} Fast preset: ${duration}s (< 5s)"
    ((PASSED++))
else
    echo -e "${YELLOW}⚠${NC} Fast preset slow: ${duration}s (expected < 5s)"
fi

echo ""

# ═══════════════════════════════════════════════════
# Swagger/Docs
# ═══════════════════════════════════════════════════
echo -e "${CYAN}Documentation${NC}"
echo "─────────────────────────────────────────────────"

swagger_code=$(curl -s -o /dev/null -w "%{http_code}" "$BASE_URL/docs")
if [ "$swagger_code" == "200" ]; then
    echo -e "${GREEN}✓${NC} Swagger UI accessible"
    ((PASSED++))
else
    echo -e "${RED}✗${NC} Swagger UI (HTTP $swagger_code)"
    ((FAILED++))
fi

test_endpoint "OpenAPI schema" "GET" "/openapi.json" '"openapi"'

echo ""

# ═══════════════════════════════════════════════════
# Summary
# ═══════════════════════════════════════════════════
echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
TOTAL=$((PASSED + FAILED))
if [ $FAILED -eq 0 ]; then
    echo -e "  ${GREEN}All tests passed!${NC} ($PASSED/$TOTAL)"
    echo ""
    echo "  Frontend can safely integrate with this backend."
else
    echo -e "  ${YELLOW}Results:${NC} ${GREEN}$PASSED passed${NC}, ${RED}$FAILED failed${NC}"
    echo ""
    echo "  Fix failing tests before frontend integration."
fi
echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"

exit $FAILED