<#
.SYNOPSIS
    Unified Build Script for ROA2WEB Windows Deployment

.DESCRIPTION
    This script builds complete deployment packages for ROA2WEB application.
    Supports building Frontend, Backend, Telegram Bot, or all components together.

    Features:
    - Flexible component selection
    - Validates dependencies (Node.js, Python)
    - Creates production-optimized builds
    - Generates deployment-ready packages
    - Supports automatic server transfer

.PARAMETER Component
    Component(s) to build (optional - shows interactive menu if not specified):
    - All: Build complete package (frontend + backend + telegram bot)
    - Frontend: Build frontend + backend files only
    - Backend: Copy backend files only (no frontend build)
    - TelegramBot: Build telegram bot package only
    - If omitted: Interactive menu will be displayed

.PARAMETER OutputPath
    Output path for deployment package (default: ./deploy-package)

.PARAMETER ServerHost
    Remote server hostname/IP for automatic deployment (optional)

.PARAMETER ServerPath
    Remote server path for automatic deployment (optional)

.PARAMETER Clean
    Clean output directory before building (default: true)

.PARAMETER CleanCache
    Clean build cache (cached node_modules) and exit

.EXAMPLE
    .\Build-ROA2WEB.ps1
    Shows interactive menu to select components to build

.EXAMPLE
    .\Build-ROA2WEB.ps1 -Component All
    Build complete deployment package (all components) without menu

.EXAMPLE
    .\Build-ROA2WEB.ps1 -Component Frontend
    Build only frontend + backend files

.EXAMPLE
    .\Build-ROA2WEB.ps1 -Component TelegramBot
    Build only Telegram bot package

.EXAMPLE
    .\Build-ROA2WEB.ps1 -Component All -OutputPath "D:\deployments\roa2web-$(Get-Date -Format 'yyyyMMdd')"
    Build complete package to custom output path

.EXAMPLE
    .\Build-ROA2WEB.ps1 -CleanCache
    Clean build cache to free disk space

.NOTES
    Author: ROA2WEB Team
    Version: 2.0 (Unified Build Script)
    Requires: Node.js 16+ (for Frontend), Python 3.11+ (for validation)
#>

[CmdletBinding()]
param(
    [ValidateSet("All", "Frontend", "Backend")]
    [string]$Component = "",

    [string]$OutputPath = "./deploy-package",
    [string]$ServerHost = "",
    [string]$ServerPath = "",
    [bool]$Clean = $true,
    [switch]$CleanCache
)

$ErrorActionPreference = "Stop"

# =============================================================================
# CONFIGURATION
# =============================================================================

$config = @{
    # Ultrathin Monolith sources (relative to deployment/windows/ directory)
    BackendSource = "../../backend"
    FrontendSource = "../../src"
    SharedSource = "../../shared"
    ConfigSource = "../config"
    RequiredNodeVersion = 16
}

# =============================================================================
# HELPER FUNCTIONS
# =============================================================================

function Write-Step {
    param([string]$Message)
    Write-Host "`n[*] $Message" -ForegroundColor Cyan
}

function Write-Success {
    param([string]$Message)
    Write-Host "    [OK] $Message" -ForegroundColor Green
}

function Write-Error {
    param([string]$Message)
    Write-Host "    [ERROR] $Message" -ForegroundColor Red
}

function Write-Warning {
    param([string]$Message)
    Write-Host "    [WARN] $Message" -ForegroundColor Yellow
}

function Write-Info {
    param([string]$Message)
    Write-Host "    [INFO] $Message" -ForegroundColor Gray
}

function Resolve-FullPath {
    param([string]$Path)

    $scriptDir = Split-Path -Parent $PSScriptRoot
    $fullPath = Join-Path $scriptDir $Path
    $fullPath = [System.IO.Path]::GetFullPath($fullPath)

    return $fullPath
}

function Clear-BuildCache {
    Write-Host "`n" + ("=" * 70) -ForegroundColor Cyan
    Write-Host "  CLEAN BUILD CACHE" -ForegroundColor Cyan
    Write-Host ("=" * 70) -ForegroundColor Cyan

    $scriptDir = Split-Path -Parent $PSScriptRoot
    $cacheDir = Join-Path $scriptDir ".build-cache"

    if (-not (Test-Path $cacheDir)) {
        Write-Warning "No build cache found at: $cacheDir"
        Write-Host "`nNothing to clean." -ForegroundColor Gray
        return
    }

    try {
        # Calculate cache size
        $cacheFiles = Get-ChildItem -Path $cacheDir -Recurse -File -ErrorAction SilentlyContinue
        $cacheSize = ($cacheFiles | Measure-Object -Property Length -Sum).Sum / 1MB

        Write-Host "`nCache location: $cacheDir" -ForegroundColor Gray
        Write-Host "Cache size: $([math]::Round($cacheSize, 2)) MB" -ForegroundColor Gray
        Write-Host "Files: $(($cacheFiles).Count)" -ForegroundColor Gray
        Write-Host ""

        Write-Host "Are you sure you want to delete the build cache? [Y/N]: " -ForegroundColor Yellow -NoNewline
        $confirmation = Read-Host

        if ($confirmation.ToUpper() -eq "Y") {
            Write-Step "Removing build cache..."
            Remove-Item -Path $cacheDir -Recurse -Force -ErrorAction Stop
            Write-Success "Build cache cleared successfully"
            Write-Success "Freed $([math]::Round($cacheSize, 2)) MB of disk space"
        } else {
            Write-Host "`nCache cleanup cancelled." -ForegroundColor Yellow
        }
    } catch {
        Write-Host "`n[ERROR] Failed to clear cache: $_" -ForegroundColor Red
    }
}

function Show-BuildMenu {
    Write-Host "`n" + ("=" * 70) -ForegroundColor Cyan
    Write-Host "  ROA2WEB - Build Component Selection Menu" -ForegroundColor Cyan
    Write-Host "  Ultrathin Monolith Architecture" -ForegroundColor Cyan
    Write-Host ("=" * 70) -ForegroundColor Cyan
    Write-Host ""
    Write-Host "  Select components to build:" -ForegroundColor Yellow
    Write-Host ""
    Write-Host "  [1] All Components" -ForegroundColor White
    Write-Host "      (Unified Backend + Frontend)" -ForegroundColor Gray
    Write-Host "      Includes: Reports, Data Entry, and Telegram modules" -ForegroundColor DarkGray
    Write-Host ""
    Write-Host "  [2] Frontend + Backend" -ForegroundColor White
    Write-Host "      (Vue.js SPA build + Unified FastAPI backend)" -ForegroundColor Gray
    Write-Host ""
    Write-Host "  [3] Backend Only" -ForegroundColor White
    Write-Host "      (Unified FastAPI backend + shared modules)" -ForegroundColor Gray
    Write-Host "      All modules included - control via MODULE_*_ENABLED flags" -ForegroundColor DarkGray
    Write-Host ""
    Write-Host "  [C] Clean Build Cache" -ForegroundColor Yellow
    Write-Host "      (Remove cached node_modules to free disk space)" -ForegroundColor Gray
    Write-Host ""
    Write-Host "  [Q] Quit" -ForegroundColor Red
    Write-Host ""
    Write-Host ("=" * 70) -ForegroundColor Cyan

    do {
        Write-Host "`nYour choice: " -ForegroundColor Yellow -NoNewline
        $choice = Read-Host

        switch ($choice.ToUpper()) {
            "1" { return "All" }
            "2" { return "Frontend" }
            "3" { return "Backend" }
            "C" {
                Clear-BuildCache
                Write-Host "`nPress any key to return to menu..." -ForegroundColor Gray
                $null = $Host.UI.RawUI.ReadKey("NoEcho,IncludeKeyDown")
                return Show-BuildMenu
            }
            "Q" {
                Write-Host "`nBuild cancelled by user." -ForegroundColor Yellow
                exit 0
            }
            default {
                Write-Host "Invalid choice. Please select 1-3, C or Q." -ForegroundColor Red
            }
        }
    } while ($true)
}

function Test-NodeJS {
    Write-Step "Checking Node.js installation..."

    try {
        $nodeVersion = node --version 2>&1
        $npmVersion = npm --version 2>&1

        Write-Success "Node.js: $nodeVersion"
        Write-Success "npm: $npmVersion"

        # Check minimum version
        if ($nodeVersion -match "v(\d+)\.") {
            $major = [int]$matches[1]
            if ($major -lt $config.RequiredNodeVersion) {
                throw "Node.js version $($config.RequiredNodeVersion)+ required (found: $nodeVersion)"
            }
        }

        return $true
    } catch {
        Write-Error "Node.js not found or version too old"
        Write-Host "`n    Install Node.js from: https://nodejs.org/" -ForegroundColor Yellow
        Write-Host "    Minimum version: $($config.RequiredNodeVersion).x" -ForegroundColor Yellow
        throw
    }
}

function Build-Frontend {
    param(
        [string]$SourcePath,
        [string]$OutputPath
    )

    Write-Step "Building Vue.js frontend in isolated environment..."

    if (-not (Test-Path $SourcePath)) {
        throw "Frontend source path not found: $SourcePath"
    }

    # For ultrathin monolith, frontend sources are in src/ directory
    # but package.json and vite.config.js are in project root
    $appFolder = "roa2web-ultrathin-monolith"

    # Create temporary build directory - this is the project root
    # Structure:
    #   .temp-frontend-build/
    #   |- package.json (from project root)
    #   |- vite.config.js (from project root)
    #   |- src/  (frontend source)
    #   \- shared/
    $tempRootDir = Join-Path $OutputPath ".temp-frontend-build"
    if (Test-Path $tempRootDir) {
        Write-Step "Cleaning existing temp build directory..."
        Remove-Item -Path $tempRootDir -Recurse -Force
    }

    # Create temp root (this will be where npm install runs)
    New-Item -ItemType Directory -Path $tempRootDir -Force | Out-Null

    # Create src subdirectory
    $tempSrcDir = Join-Path $tempRootDir "src"
    New-Item -ItemType Directory -Path $tempSrcDir -Force | Out-Null
    Write-Success "Created temp build directory (isolated from WSL)"

    # The build directory is the root, not src
    $tempBuildDir = $tempRootDir

    # Create cache directory for node_modules (OUTSIDE deploy-package)
    $scriptDir = Split-Path -Parent $PSScriptRoot
    $cacheDir = Join-Path $scriptDir ".build-cache-$appFolder"
    if (-not (Test-Path $cacheDir)) {
        New-Item -ItemType Directory -Path $cacheDir -Force | Out-Null
    }

    # Copy src/ contents to temp src/ subdirectory
    Write-Step "Copying frontend sources to temp directory..."
    $excludeDirs = @("node_modules", "dist", ".git", "__pycache__", ".vscode", ".idea")
    $excludeFiles = @(".env", ".env.local", "*.log")

    Get-ChildItem -Path $SourcePath -Recurse | ForEach-Object {
        $relativePath = $_.FullName.Substring($SourcePath.Length).TrimStart('\', '/')

        # Check if in excluded directory
        $inExcludedDir = $false
        foreach ($excludeDir in $excludeDirs) {
            if ($relativePath -match "^$excludeDir" -or $relativePath -match "[\\/]$excludeDir[\\/]") {
                $inExcludedDir = $true
                break
            }
        }
        if ($inExcludedDir) { return }

        # Check if excluded file
        $isExcludedFile = $false
        foreach ($pattern in $excludeFiles) {
            if ($_.Name -like $pattern) {
                $isExcludedFile = $true
                break
            }
        }
        if ($isExcludedFile) { return }

        # Copy to src/ subdirectory
        $destPath = Join-Path $tempSrcDir $relativePath

        if ($_.PSIsContainer) {
            if (-not (Test-Path $destPath)) {
                New-Item -ItemType Directory -Path $destPath -Force | Out-Null
            }
        } else {
            $destDir = Split-Path $destPath -Parent
            if (-not (Test-Path $destDir)) {
                New-Item -ItemType Directory -Path $destDir -Force | Out-Null
            }
            Copy-Item -Path $_.FullName -Destination $destPath -Force
        }
    }
    Write-Success "Frontend sources copied to temp"

    # Copy package.json, vite.config.js, package-lock.json, index.html from project root
    Write-Step "Copying build configuration files..."
    $projectRoot = Split-Path $SourcePath -Parent
    $configFiles = @("package.json", "vite.config.js", "package-lock.json", "index.html")
    foreach ($file in $configFiles) {
        $srcFile = Join-Path $projectRoot $file
        if (Test-Path $srcFile) {
            $destFile = Join-Path $tempBuildDir $file
            Copy-Item -Path $srcFile -Destination $destFile -Force
            Write-Success "Copied: $file"
        } else {
            Write-Warning "Not found: $file"
        }
    }

    # Copy public/ folder (contains web.config and other static assets)
    $publicSourcePath = Join-Path $projectRoot "public"
    if (Test-Path $publicSourcePath) {
        $publicDestPath = Join-Path $tempBuildDir "public"
        Write-Step "Copying public/ folder..."
        Write-Info "Source: $publicSourcePath"
        Write-Info "Dest: $publicDestPath"
        Copy-Item -Path $publicSourcePath -Destination $publicDestPath -Recurse -Force
        Write-Success "public/ folder copied (includes web.config)"

        # Verify web.config was copied
        $copiedWebConfig = Join-Path $publicDestPath "web.config"
        if (Test-Path $copiedWebConfig) {
            Write-Success "web.config found in public/"
        } else {
            Write-Warning "web.config NOT found in public/ - check source"
        }
    } else {
        Write-Warning "public/ folder not found at: $publicSourcePath"
    }

    # Copy shared folder to maintain relative imports (../shared/)
    # For ultrathin monolith: src/ and shared/ are siblings at project root
    $projectRoot = Split-Path $SourcePath -Parent
    $sharedSourcePath = Join-Path $projectRoot "shared"

    if (Test-Path $sharedSourcePath) {
        $sharedDestPath = Join-Path $tempRootDir "shared"

        Write-Step "Copying shared components for build..."
        Write-Info "Source: $sharedSourcePath"
        Write-Info "Dest: $sharedDestPath"

        # Remove existing shared folder in dest if exists
        if (Test-Path $sharedDestPath) {
            Remove-Item -Path $sharedDestPath -Recurse -Force
        }

        Copy-Item -Path $sharedSourcePath -Destination $sharedDestPath -Recurse -Force -Exclude @("__pycache__", "*.pyc", "tests")
        Write-Success "Shared components copied for relative imports"
    } else {
        Write-Warning "Shared folder not found at: $sharedSourcePath"
    }

    # Build in temp directory (now at tempRootDir/src)
    Push-Location $tempBuildDir
    try {
        # Check if dependencies need to be reinstalled
        $needsInstall = $true
        $cachedNodeModules = Join-Path $cacheDir "node_modules"
        $cachedPackageJson = Join-Path $cacheDir "package.json"
        $cachedPackageLock = Join-Path $cacheDir "package-lock.json"

        $currentPackageJson = Join-Path $tempBuildDir "package.json"
        $currentPackageLock = Join-Path $tempBuildDir "package-lock.json"

        if ((Test-Path $cachedNodeModules) -and (Test-Path $cachedPackageJson)) {
            # Compare package.json hashes
            $currentHash = (Get-FileHash $currentPackageJson -Algorithm SHA256).Hash
            $cachedHash = (Get-FileHash $cachedPackageJson -Algorithm SHA256).Hash

            # Also compare package-lock.json if it exists
            $lockMatches = $true
            if ((Test-Path $currentPackageLock) -and (Test-Path $cachedPackageLock)) {
                $currentLockHash = (Get-FileHash $currentPackageLock -Algorithm SHA256).Hash
                $cachedLockHash = (Get-FileHash $cachedPackageLock -Algorithm SHA256).Hash
                $lockMatches = ($currentLockHash -eq $cachedLockHash)
            }

            if (($currentHash -eq $cachedHash) -and $lockMatches) {
                Write-Step "Reusing cached node_modules (dependencies unchanged)..."
                Copy-Item -Path $cachedNodeModules -Destination $tempBuildDir -Recurse -Force
                $needsInstall = $false
                Write-Success "Dependencies restored from cache (saved 2-5 minutes!)"
            } else {
                Write-Info "Dependencies changed, will reinstall"
            }
        }

        if ($needsInstall) {
            # Install dependencies (including devDependencies for Vite)
            Write-Step "Installing npm dependencies (Windows binaries)..."
            # Clear NODE_ENV to ensure devDependencies (vite, etc.) are installed
            Remove-Item Env:\NODE_ENV -ErrorAction SilentlyContinue
            npm install | Out-Default

            $nodeModulesPath = Join-Path $tempBuildDir "node_modules"
            if (-not (Test-Path $nodeModulesPath)) {
                throw "npm install failed: node_modules not created"
            }
            Write-Success "Dependencies installed in temp"

            # Update cache
            Write-Step "Caching node_modules for future builds..."
            if (Test-Path $cachedNodeModules) {
                Remove-Item -Path $cachedNodeModules -Recurse -Force
            }
            Copy-Item -Path $nodeModulesPath -Destination $cachedNodeModules -Recurse -Force
            Copy-Item -Path $currentPackageJson -Destination $cachedPackageJson -Force
            if (Test-Path $currentPackageLock) {
                Copy-Item -Path $currentPackageLock -Destination $cachedPackageLock -Force
            }
            Write-Success "Cache updated for next build"
        }

        # Verify Vite is installed
        $nodeModulesPath = Join-Path $tempBuildDir "node_modules"
        $vitePath = Join-Path $nodeModulesPath ".bin\vite.cmd"
        if (-not (Test-Path $vitePath)) {
            throw "Vite not found in node_modules - devDependencies not installed"
        }

        # node_modules is already in tempBuildDir (which is tempRootDir)
        # No need for junction since we build from project root

        # Build for production
        Write-Step "Building for production..."
        $env:NODE_ENV = "production"
        npm run build | Out-Default
        Write-Success "Build completed"

        # Verify dist folder
        $distPath = Join-Path $tempBuildDir "dist"
        if (-not (Test-Path $distPath)) {
            throw "Build failed: dist folder not found"
        }

        $distFiles = Get-ChildItem -Path $distPath -Recurse -File
        $totalSize = ($distFiles | Measure-Object -Property Length -Sum).Sum / 1MB
        Write-Success "Generated $(($distFiles).Count) files ($([math]::Round($totalSize, 2)) MB)"

        # Verify web.config was built
        $webConfigPath = Join-Path $distPath "web.config"
        if (Test-Path $webConfigPath) {
            Write-Success "web.config found in build output"
        } else {
            Write-Warning "web.config NOT found in build output: $webConfigPath"
            Write-Warning "Check if public/web.config exists in source"
        }

        return $distPath
    } finally {
        Pop-Location
    }
}

function Copy-BackendFiles {
    param(
        [string]$SourcePath,
        [string]$DestPath
    )

    Write-Step "Copying backend files..."

    if (-not (Test-Path $SourcePath)) {
        throw "Backend source path not found: $SourcePath"
    }

    if (-not (Test-Path $DestPath)) {
        New-Item -ItemType Directory -Path $DestPath -Force | Out-Null
    }

    # Exclude patterns
    $excludeDirs = @("venv", "__pycache__", ".pytest_cache", "logs", "temp", "node_modules")
    $excludeFiles = @("*.pyc", "*.pyo", "*.log", ".env", ".env.local")

    $normalizedSourcePath = $SourcePath.TrimEnd('\', '/') + '\'

    $testExclude = {
        param([string]$RelativePath, [bool]$IsDirectory, [array]$ExcludeDirs, [array]$ExcludeFiles)

        if ($IsDirectory) {
            $dirName = Split-Path $RelativePath -Leaf
            if ($ExcludeDirs -contains $dirName) {
                return $true
            }
        }

        $pathParts = $RelativePath -split '[\\/]'
        foreach ($part in $pathParts) {
            if ($ExcludeDirs -contains $part) {
                return $true
            }
        }

        if (-not $IsDirectory) {
            foreach ($pattern in $ExcludeFiles) {
                if ($RelativePath -like $pattern) {
                    return $true
                }
            }
        }

        return $false
    }

    Get-ChildItem -Path $SourcePath -Recurse | ForEach-Object {
        if ($_.FullName.Length -le $normalizedSourcePath.Length) {
            return
        }
        $relativePath = $_.FullName.Substring($normalizedSourcePath.Length)

        $shouldExclude = & $testExclude -RelativePath $relativePath -IsDirectory $_.PSIsContainer -ExcludeDirs $excludeDirs -ExcludeFiles $excludeFiles
        if ($shouldExclude) {
            return
        }

        $destFile = Join-Path $DestPath $relativePath

        if ($_.PSIsContainer) {
            if (-not (Test-Path $destFile)) {
                New-Item -ItemType Directory -Path $destFile -Force | Out-Null
            }
        } else {
            $destDir = Split-Path $destFile -Parent
            if (-not (Test-Path $destDir)) {
                New-Item -ItemType Directory -Path $destDir -Force | Out-Null
            }
            Copy-Item -Path $_.FullName -Destination $destFile -Force
        }
    }

    $backendFiles = Get-ChildItem -Path $DestPath -Recurse -File
    Write-Success "Copied $(($backendFiles).Count) backend files"

    # Copy .env.example explicitly (excluded from recursive copy)
    $sourceEnvExample = Join-Path $SourcePath ".env.example"
    $destEnvExample = Join-Path $DestPath ".env.example"
    if (Test-Path $sourceEnvExample) {
        Copy-Item -Path $sourceEnvExample -Destination $destEnvExample -Force
        Write-Success ".env.example template copied"
    } else {
        Write-Warning ".env.example not found in source - manual configuration required"
    }

    # Verify requirements.txt
    $requirementsTxt = Join-Path $DestPath "requirements.txt"
    if (-not (Test-Path $requirementsTxt)) {
        Write-Error "CRITICAL: requirements.txt not found!"
        throw "Backend package incomplete - missing requirements.txt"
    }
    Write-Success "Verified: requirements.txt present"
}

# Copy-TelegramBotFiles function removed - Telegram is now part of unified backend (backend/modules/telegram/)

# Copy-DataEntryBackendFiles function removed - Data Entry is now part of unified backend (backend/modules/data_entry/)

function Copy-SharedModules {
    param(
        [string]$SourcePath,
        [string]$DestPath
    )

    Write-Step "Copying shared modules..."

    if (Test-Path $SourcePath) {
        Copy-Item -Path $SourcePath -Destination $DestPath -Recurse -Force -Exclude @("__pycache__", "*.pyc", "tests")
        Write-Success "Shared modules copied"
    } else {
        Write-Warning "Shared modules not found at: $SourcePath"
    }
}

function Copy-ConfigTemplates {
    param(
        [string]$SourcePath,
        [string]$DestPath
    )

    Write-Step "Copying config templates..."

    if (Test-Path $SourcePath) {
        Copy-Item -Path $SourcePath -Destination $DestPath -Recurse -Force
        Write-Success "Config templates copied"
    }
}

function Remove-TempDirectories {
    param([string]$OutputPath)

    Write-Step "Cleaning up temporary build directories..."

    $tempBuildDir = Join-Path $OutputPath ".temp-frontend-build"

    if (Test-Path $tempBuildDir) {
        try {
            Remove-Item -Path $tempBuildDir -Recurse -Force -ErrorAction Stop
            Write-Success "Temporary build directory cleaned"
        } catch {
            Write-Warning "Could not remove temp directory: $_"
            Write-Warning "You may need to manually delete: $tempBuildDir"
        }
    } else {
        Write-Success "No temporary directories to clean"
    }
}

function Copy-DeploymentScripts {
    param(
        [string]$ScriptsSourcePath,
        [string]$DestPath,
        [string]$ComponentType
    )

    Write-Step "Copying deployment scripts..."

    $scriptsDir = Join-Path $DestPath "scripts"
    New-Item -ItemType Directory -Path $scriptsDir -Force | Out-Null

    # Debug: Show paths
    Write-Host "    [DEBUG] ScriptsSourcePath: $ScriptsSourcePath" -ForegroundColor Magenta
    Write-Host "    [DEBUG] DestPath: $DestPath" -ForegroundColor Magenta
    Write-Host "    [DEBUG] ScriptsDir: $scriptsDir" -ForegroundColor Magenta

    # Essential scripts for all deployments
    $scripts = @(
        "ROA2WEB-Console.ps1",      # Unified deployment & management console
        "Install-ROA2WEB.ps1",
        "Install-TelegramBot.ps1"
    )

    # Add utility scripts for complete deployments
    if ($ComponentType -eq "All" -or $ComponentType -eq "TelegramBot") {
        $scripts += @(
            "Backup-TelegramDB.ps1",
            "Setup-DailyBackup.ps1",
            "Setup-ClaudeAuth.ps1"
        )
    }

    if ($ComponentType -eq "All" -or $ComponentType -eq "Frontend") {
        $scripts += @(
            "Enable-HTTPS.ps1"
        )
    }

    $copiedCount = 0
    foreach ($script in $scripts) {
        $scriptPath = Join-Path $ScriptsSourcePath $script
        if (Test-Path $scriptPath) {
            $destScript = Join-Path $scriptsDir $script

            # Debug: Show file info
            $sourceSize = (Get-Item $scriptPath).Length
            Write-Host "    [DEBUG] Copying $script (size: $sourceSize bytes)" -ForegroundColor Magenta

            # Force delete destination first to avoid caching issues
            if (Test-Path $destScript) {
                $oldSize = (Get-Item $destScript).Length
                Write-Host "    [DEBUG] Deleting old $script (was: $oldSize bytes)" -ForegroundColor Magenta
                Remove-Item -Path $destScript -Force
            }

            Copy-Item -Path $scriptPath -Destination $scriptsDir -Force

            # Debug: Verify copy
            $newSize = (Get-Item $destScript).Length
            Write-Host "    [DEBUG] Copied $script (new size: $newSize bytes)" -ForegroundColor Magenta

            $copiedCount++
        } else {
            Write-Warning "Script not found: $script"
        }
    }

    Write-Success "Copied $copiedCount deployment scripts"
}

function New-DeploymentReadme {
    param(
        [string]$DestPath,
        [string]$ComponentType
    )

    Write-Step "Creating deployment README..."

    $componentDesc = switch ($ComponentType) {
        "All" { "COMPLETE DEPLOYMENT PACKAGE (Ultrathin Monolith - All Modules)" }
        "Frontend" { "UNIFIED FRONTEND + BACKEND DEPLOYMENT PACKAGE" }
        "Backend" { "UNIFIED BACKEND DEPLOYMENT PACKAGE (All Modules)" }
    }

    $readme = @"
================================================================================
                        ROA2WEB DEPLOYMENT PACKAGE
                          $componentDesc
                   Generated: $(Get-Date -Format "yyyy-MM-dd HH:mm:ss")
================================================================================

CONTENTS:
---------

  backend/      Unified FastAPI backend (port 8000)
                |- modules/
                |  |- reports/       Reports module (Oracle)
                |  |- data_entry/    Data Entry module (SQLite)
                |  \- telegram/      Telegram bot module (background task)
                \- main.py            Single entry point (uvicorn)

  frontend/     Unified Vue.js SPA (production build)
                Single-page application with integrated modules

  shared/       Shared Python modules
                |- auth/              JWT authentication & middleware
                |- database/          Oracle connection pool
                \- routes/            Shared API routes (companies, calendar)

  config/       Configuration templates
                \- web.config         IIS configuration for unified backend

  scripts/      PowerShell deployment scripts

MODULE CONTROL:
---------------
Enable/disable modules via environment variables in backend/.env:
  MODULE_REPORTS_ENABLED=true       # Reports module
  MODULE_DATA_ENTRY_ENABLED=true    # Data Entry module
  MODULE_TELEGRAM_ENABLED=true      # Telegram bot module


DEPLOYMENT SCRIPTS:
-------------------
  ROA2WEB-Console.ps1       Unified deployment & management console
                            - Deploy components (Backend/Frontend)
                            - Manage single unified service
                            - Check system status and health

  Install-ROA2WEB.ps1       First-time installation (creates Windows service)

  Enable-HTTPS.ps1          Configure HTTPS/SSL certificates
"@

    $readme += @"


================================================================================
DEPLOYMENT WORKFLOW
================================================================================

>> FIRST TIME INSTALLATION:
---------------------------

1. Install Application (creates Windows service):
   cd scripts
   .\Install-ROA2WEB.ps1

2. Configure environment (.env file):
   notepad C:\inetpub\wwwroot\roa2web\backend\.env

   IMPORTANT - Configure module flags:
   MODULE_REPORTS_ENABLED=true       # Enable/disable Reports module
   MODULE_DATA_ENTRY_ENABLED=true    # Enable/disable Data Entry module
   MODULE_TELEGRAM_ENABLED=true      # Enable/disable Telegram bot module

3. Start the unified backend service:
   Start-Service ROA2WEB-Backend

   OR using console:
   .\ROA2WEB-Console.ps1
   (Select: Manage Services > Start Service)

4. Verify installation:
   - Backend API:  http://localhost:8000/docs
   - Health check: http://localhost:8000/health
   - Frontend:     http://localhost/ (via IIS)


>> UPDATES (Deploy New Version):
----------------------------------
.\ROA2WEB-Console.ps1 -NonInteractive -Action DeployAll
(Stops service, updates files, restarts service)

>> SERVICE MANAGEMENT:
-----------------------
# Start service
Start-Service ROA2WEB-Backend

# Stop service
Stop-Service ROA2WEB-Backend

# Restart service
Restart-Service ROA2WEB-Backend

# Check status
Get-Service ROA2WEB-Backend
.\ROA2WEB-Console.ps1 -NonInteractive -Action Status

================================================================================
REQUIREMENTS
================================================================================
  - Windows Server 2016+ or Windows 10/11
  - IIS with URL Rewrite Module
  - Python 3.11+
  - PowerShell 5.1+ (run as Administrator)

NOTES:
------
  - Virtual environments created automatically during installation
  - .env files preserved during updates
  - Automatic backup before each update
  - Default install location: C:\inetpub\wwwroot\roa2web\
  - Build cache NOT included in this package (stays on build machine)
  - Single Windows service: ROA2WEB-Backend (manages all modules)

ARCHITECTURE:
-------------
  ULTRATHIN MONOLITH: One backend process with multiple modules
  - Modules controlled via .env flags (MODULE_*_ENABLED)
  - All modules share: Oracle pool, auth, cache
  - Telegram bot runs as background task (not separate service)

TROUBLESHOOTING:
----------------
  Backend logs:     C:\inetpub\wwwroot\roa2web\logs\backend-stdout.log
                    C:\inetpub\wwwroot\roa2web\logs\backend-stderr.log
  IIS logs:         C:\inetpub\logs\LogFiles\
  Service status:   Get-Service ROA2WEB-Backend

For detailed documentation, see: deployment/windows/docs/WINDOWS_DEPLOYMENT.md

================================================================================
"@

    $readmePath = Join-Path $DestPath "README.txt"
    Set-Content -Path $readmePath -Value $readme -Force
    Write-Success "Deployment README created"
}

function New-DeploymentPackage {
    param(
        [string]$OutputPath,
        [string]$ComponentType,
        [hashtable]$Paths
    )

    Write-Step "Creating deployment package structure..."

    # Clean output if requested
    if ($Clean -and (Test-Path $OutputPath)) {
        Write-Warning "Cleaning output directory..."
        Remove-Item -Path $OutputPath -Recurse -Force
    }

    if (-not (Test-Path $OutputPath)) {
        New-Item -ItemType Directory -Path $OutputPath -Force | Out-Null
    }

    # Build based on component type
    switch ($ComponentType) {
        "All" {
            # Unified Frontend (Vue.js SPA)
            $frontendDistPath = Build-Frontend -SourcePath $Paths.FrontendSource -OutputPath $OutputPath
            $frontendDest = Join-Path $OutputPath "frontend"
            New-Item -ItemType Directory -Path $frontendDest -Force | Out-Null
            Write-Step "Copying Unified Frontend files (SPA)..."
            Write-Info "Source: $frontendDistPath"
            Write-Info "Destination: $frontendDest"
            Copy-Item -Path "$frontendDistPath\*" -Destination $frontendDest -Recurse -Force

            # Verify web.config was copied
            $copiedWebConfig = Join-Path $frontendDest "web.config"
            if (Test-Path $copiedWebConfig) {
                Write-Success "web.config copied to package"
            } else {
                Write-Warning "web.config NOT copied to package"
            }

            Write-Success "Unified Frontend files copied"

            # Unified Backend (includes Reports, Data Entry, Telegram modules)
            $backendDest = Join-Path $OutputPath "backend"
            Copy-BackendFiles -SourcePath $Paths.BackendSource -DestPath $backendDest

            # Shared modules
            $sharedDest = Join-Path $OutputPath "shared"
            Copy-SharedModules -SourcePath $Paths.SharedSource -DestPath $sharedDest

            # Config templates
            $configDest = Join-Path $OutputPath "config"
            Copy-ConfigTemplates -SourcePath $Paths.ConfigSource -DestPath $configDest
        }

        "Frontend" {
            # Unified Frontend build (Vue.js SPA)
            $frontendDistPath = Build-Frontend -SourcePath $Paths.FrontendSource -OutputPath $OutputPath
            $frontendDest = Join-Path $OutputPath "frontend"
            New-Item -ItemType Directory -Path $frontendDest -Force | Out-Null
            Write-Step "Copying Unified Frontend files (SPA)..."
            Write-Info "Source: $frontendDistPath"
            Write-Info "Destination: $frontendDest"
            Copy-Item -Path "$frontendDistPath\*" -Destination $frontendDest -Recurse -Force

            # Verify web.config was copied
            $copiedWebConfig = Join-Path $frontendDest "web.config"
            if (Test-Path $copiedWebConfig) {
                Write-Success "web.config copied to package"
            } else {
                Write-Warning "web.config NOT copied to package"
            }

            Write-Success "Unified Frontend files copied"

            # Unified Backend (includes all modules)
            $backendDest = Join-Path $OutputPath "backend"
            Copy-BackendFiles -SourcePath $Paths.BackendSource -DestPath $backendDest

            # Shared modules
            $sharedDest = Join-Path $OutputPath "shared"
            Copy-SharedModules -SourcePath $Paths.SharedSource -DestPath $sharedDest

            # Config templates
            $configDest = Join-Path $OutputPath "config"
            Copy-ConfigTemplates -SourcePath $Paths.ConfigSource -DestPath $configDest
        }

        "Backend" {
            # Unified Backend only (includes Reports, Data Entry, Telegram modules)
            $backendDest = Join-Path $OutputPath "backend"
            Copy-BackendFiles -SourcePath $Paths.BackendSource -DestPath $backendDest

            # Shared modules
            $sharedDest = Join-Path $OutputPath "shared"
            Copy-SharedModules -SourcePath $Paths.SharedSource -DestPath $sharedDest

            # Config templates
            $configDest = Join-Path $OutputPath "config"
            Copy-ConfigTemplates -SourcePath $Paths.ConfigSource -DestPath $configDest
        }
    }

    # Cleanup temporary directories
    if ($ComponentType -eq "All" -or $ComponentType -eq "Frontend") {
        Remove-TempDirectories -OutputPath $OutputPath
    }

    # Copy deployment scripts
    Copy-DeploymentScripts -ScriptsSourcePath $PSScriptRoot -DestPath $OutputPath -ComponentType $ComponentType

    # Create README
    New-DeploymentReadme -DestPath $OutputPath -ComponentType $ComponentType

    # Calculate package size
    $packageFiles = Get-ChildItem -Path $OutputPath -Recurse -File
    $packageSize = ($packageFiles | Measure-Object -Property Length -Sum).Sum / 1MB

    Write-Success "Deployment package created"
    Write-Success "Total files: $(($packageFiles).Count)"
    Write-Success "Total size: $([math]::Round($packageSize, 2)) MB"

    return $OutputPath
}

# =============================================================================
# MAIN BUILD FLOW
# =============================================================================

function Main {
    # Handle -CleanCache parameter
    if ($CleanCache) {
        Clear-BuildCache
        exit 0
    }

    # Show interactive menu if no component specified
    if ([string]::IsNullOrWhiteSpace($Component)) {
        $script:Component = Show-BuildMenu
    }

    $banner = @"

    ====================================================================
     ROA2WEB - Unified Build Script (v2.0)
     Building: $Component
    ====================================================================

"@
    Write-Host $banner -ForegroundColor Cyan

    try {
        # Resolve paths
        $paths = @{
            # Ultrathin Monolith sources
            BackendSource = Resolve-FullPath -Path $config.BackendSource
            FrontendSource = Resolve-FullPath -Path $config.FrontendSource
            SharedSource = Resolve-FullPath -Path $config.SharedSource
            ConfigSource = Resolve-FullPath -Path $config.ConfigSource
        }

        $outputFullPath = if ([System.IO.Path]::IsPathRooted($OutputPath)) { $OutputPath } else { Resolve-FullPath -Path $OutputPath }

        Write-Host "`nConfiguration:" -ForegroundColor Yellow
        Write-Host "  Component:    $Component"
        Write-Host "  Output Path:  $outputFullPath"

        # Validate Node.js for frontend builds
        if ($Component -eq "All" -or $Component -eq "Frontend" -or $Component -eq "DataEntryApp") {
            Test-NodeJS
        }

        # Build package
        $packagePath = New-DeploymentPackage `
            -OutputPath $outputFullPath `
            -ComponentType $Component `
            -Paths $paths

        # Show success
        Write-Host "`n" + ("=" * 70) -ForegroundColor Cyan
        Write-Host "  BUILD COMPLETED SUCCESSFULLY" -ForegroundColor Green
        Write-Host ("=" * 70) -ForegroundColor Cyan

        Write-Host "`nDeployment Package: $packagePath" -ForegroundColor Yellow
        Write-Host "`nNext Steps:" -ForegroundColor Yellow
        Write-Host "  1. Transfer package to Windows Server" -ForegroundColor Gray
        Write-Host "  2. On server, run deployment scripts from scripts/ directory" -ForegroundColor Gray
        Write-Host "  3. Use Manage-ROA2WEB.ps1 for service management" -ForegroundColor Gray

        Write-Host "`n" + ("=" * 70) -ForegroundColor Cyan

    } catch {
        Write-Host "`n[BUILD FAILED] $_" -ForegroundColor Red
        Write-Host $_.ScriptStackTrace -ForegroundColor Red
        exit 1
    }
}

# Run main build
Main