#!/usr/bin/env bash
# Monorepo Readiness Gate Script
# Runs all tests and checks to prevent regressions across backend, web, desktop, and mobile

set -e

RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
BLUE='\033[0;34m'
NC='\033[0m' # No Color

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
ROOT_DIR="$(dirname "$SCRIPT_DIR")"

# Results tracking
TOTAL_CHECKS=0
PASSED_CHECKS=0
FAILED_CHECKS=0

# Function to run a check and track results
run_check() {
    local name="$1"
    local command="$2"
    
    TOTAL_CHECKS=$((TOTAL_CHECKS + 1))
    echo -e "\n${BLUE}▶ Running: $name${NC}"
    
    if eval "$command"; then
        PASSED_CHECKS=$((PASSED_CHECKS + 1))
        echo -e "${GREEN}✓ PASSED: $name${NC}"
        return 0
    else
        FAILED_CHECKS=$((FAILED_CHECKS + 1))
        echo -e "${RED}✗ FAILED: $name${NC}"
        return 1
    fi
}

# Function to check if a command exists
command_exists() {
    command -v "$1" >/dev/null 2>&1
}

echo "=========================================="
echo "  SwingMusic Monorepo Readiness Gate"
echo "=========================================="
echo ""

# ===========================================
# BACKEND CHECKS
# ===========================================
echo -e "\n${YELLOW}════════════════════════════════════════${NC}"
echo -e "${YELLOW}  BACKEND CHECKS${NC}"
echo -e "${YELLOW}════════════════════════════════════════${NC}"

cd "$ROOT_DIR"

# Check Python version
run_check "Python version (3.11+)" "python3 --version | grep -E '3\.(1[1-9]|[2-9][0-9])'"

# Check backend dependencies installed
run_check "Backend dependencies" "test -d .venv || pip list | grep -q flask"

# Run backend linting (if ruff available)
if command_exists ruff; then
    run_check "Backend linting (ruff)" "ruff check src/swingmusic"
fi

# Run backend unit tests
if [ -d "tests" ]; then
    run_check "Backend unit tests" "python3 -m pytest tests/ -v --tb=short -x"
fi

# Check backend can start
run_check "Backend startup check" "python3 -c 'from swingmusic.app_builder import build; app = build(); print(\"OK\")'"

# ===========================================
# MOBILE CHECKS
# ===========================================
echo -e "\n${YELLOW}════════════════════════════════════════${NC}"
echo -e "${YELLOW}  MOBILE CHECKS${NC}"
echo -e "${YELLOW}════════════════════════════════════════${NC}"

MOBILE_DIR="$ROOT_DIR/swingmusic_mobile"

if [ -d "$MOBILE_DIR" ]; then
    cd "$MOBILE_DIR"
    
    # Check Flutter is available
    if command_exists flutter; then
        run_check "Flutter version" "flutter --version"
        
        # Check Flutter dependencies
        run_check "Flutter pub get" "flutter pub get"
        
        # Run Flutter analyze
        run_check "Flutter analyze" "flutter analyze --no-fatal-infos"
        
        # Check Flutter build (dry run)
        run_check "Flutter build check" "flutter build apk --debug --target-platform android-arm64"
    else
        echo -e "${YELLOW}⚠ Flutter not installed, skipping mobile checks${NC}"
    fi
else
    echo -e "${YELLOW}⚠ Mobile directory not found, skipping mobile checks${NC}"
fi

# ===========================================
# WEB CLIENT CHECKS
# ===========================================
echo -e "\n${YELLOW}════════════════════════════════════════${NC}"
echo -e "${YELLOW}  WEB CLIENT CHECKS${NC}"
echo -e "${YELLOW}════════════════════════════════════════${NC}"

WEB_DIR="$ROOT_DIR/swingmusic_web"

if [ -d "$WEB_DIR" ]; then
    cd "$WEB_DIR"
    
    # Check Node.js is available
    if command_exists node; then
        run_check "Node.js version" "node --version"
        
        # Check npm dependencies
        if [ -f "package.json" ]; then
            run_check "npm install" "npm install --quiet"
            
            # Run linting
            if command_exists npm; then
                run_check "npm lint" "npm run lint"
                
                # Build check
                run_check "npm build" "npm run build"
            fi
        fi
    else
        echo -e "${YELLOW}⚠ Node.js not installed, skipping web checks${NC}"
    fi
else
    echo -e "${YELLOW}⚠ Web directory not found, skipping web checks${NC}"
fi

# ===========================================
# DESKTOP CLIENT CHECKS
# ===========================================
echo -e "\n${YELLOW}════════════════════════════════════════${NC}"
echo -e "${YELLOW}  DESKTOP CLIENT CHECKS${NC}"
echo -e "${YELLOW}════════════════════════════════════════${NC}"

DESKTOP_DIR="$ROOT_DIR/swingmusic-desktop"

if [ -d "$DESKTOP_DIR" ]; then
    cd "$DESKTOP_DIR"
    
    # Check Node.js is available
    if command_exists node; then
        run_check "Node.js version" "node --version"
        
        # Check npm dependencies
        if [ -f "package.json" ]; then
            run_check "npm install" "npm install --quiet"
            
            # Run linting
            if command_exists npm; then
                run_check "npm build" "npm run build"
            fi
        fi
    else
        echo -e "${YELLOW}⚠ Node.js not installed, skipping desktop checks${NC}"
    fi
else
    echo -e "${YELLOW}⚠ Desktop directory not found, skipping desktop checks${NC}"
fi

# ===========================================
# CROSS-PLATFORM CHECKS
# ===========================================
echo -e "\n${YELLOW}════════════════════════════════════════${NC}"
echo -e "${YELLOW}  CROSS-PLATFORM CHECKS${NC}"
echo -e "${YELLOW}════════════════════════════════════════${NC}"

cd "$ROOT_DIR"

# Check for uncommitted changes (WIP state)
if git diff --quiet 2>/dev/null && git diff --staged --quiet 2>/dev/null; then
    run_check "Git clean state" "true"
else
    echo -e "${YELLOW}⚠ Uncommitted changes detected (WIP state)${NC}"
    run_check "Git clean state" "false"
fi

# Check for merge conflicts
run_check "No merge conflicts" "! git diff --check 2>/dev/null || true"

# Check for large files (>10MB)
run_check "No large files" "! find . -type f -size +10M -not -path './.git/*' -not -path '*/node_modules/*' -not -path '*/.venv/*' | grep -q ."

# ===========================================
# SUMMARY
# ===========================================
echo -e "\n=========================================="
echo -e "  READINESS GATE SUMMARY"
echo -e "=========================================="
echo ""
echo -e "Total checks:  $TOTAL_CHECKS"
echo -e "${GREEN}Passed:        $PASSED_CHECKS${NC}"
echo -e "${RED}Failed:        $FAILED_CHECKS${NC}"
echo ""

# Calculate health score
if [ "$TOTAL_CHECKS" -gt 0 ]; then
    HEALTH_SCORE=$((PASSED_CHECKS * 100 / TOTAL_CHECKS))
else
    HEALTH_SCORE=0
fi

echo -e "Health Score:  ${HEALTH_SCORE}%"
echo ""

if [ "$FAILED_CHECKS" -eq 0 ]; then
    echo -e "${GREEN}✓ ALL CHECKS PASSED - Repository is ready for deployment${NC}"
    exit 0
elif [ "$HEALTH_SCORE" -ge 80 ]; then
    echo -e "${YELLOW}⚠ MOSTLY READY - Some checks failed but score is acceptable${NC}"
    exit 0
else
    echo -e "${RED}✗ NOT READY - Too many checks failed, please fix issues${NC}"
    exit 1
fi