[CmdletBinding()]
param(
    [string]$OutputDirectory = '',
    [switch]$IncludeUploads,
    [switch]$IncludeDatabase,
    [switch]$SkipBuild
)

$ErrorActionPreference = 'Stop'

$ProjectRoot = (Resolve-Path (Join-Path $PSScriptRoot '..')).Path
if ([string]::IsNullOrWhiteSpace($OutputDirectory)) {
    $OutputDirectory = Join-Path $ProjectRoot 'release'
}
$OutputDirectory = [System.IO.Path]::GetFullPath($OutputDirectory)

function Require-File([string]$Path, [string]$Message) {
    if (-not (Test-Path -LiteralPath $Path -PathType Leaf)) {
        throw "$Message`nMissing: $Path"
    }
}

function Copy-OptionalFile([string]$Source, [string]$DestinationDirectory) {
    if (Test-Path -LiteralPath $Source -PathType Leaf) {
        Copy-Item -LiteralPath $Source -Destination $DestinationDirectory -Force
        return $true
    }
    return $false
}

function Validate-YamlWindowsPaths([string]$Path) {
    $lineNumber = 0
    foreach ($line in Get-Content -LiteralPath $Path) {
        $lineNumber++
        if ($line -match ':\s*"[^"]*\\[^"]*"') {
            throw "Invalid YAML path at $Path line $lineNumber. Use forward slashes (D:/data) or single quotes ('D:\data'), not a double-quoted backslash path."
        }
    }
}

if (-not $SkipBuild) {
    if ($null -eq (Get-Command wails -ErrorAction SilentlyContinue)) {
        throw 'Wails CLI was not found. Install Wails v2 before publishing.'
    }
    Write-Host 'Building Wails release...' -ForegroundColor Cyan
    Push-Location $ProjectRoot
    try {
        & wails build
        if ($LASTEXITCODE -ne 0) {
            throw "wails build failed with exit code $LASTEXITCODE"
        }
    } finally {
        Pop-Location
    }
}

$BinDirectory = Join-Path $ProjectRoot 'build\bin'
$Executable = Join-Path $BinDirectory 'smart-parking.exe'
$Config = Join-Path $ProjectRoot 'config.yaml'
Require-File $Executable 'The Wails executable was not found. Run without -SkipBuild or build the project first.'
Require-File $Config 'Production config.yaml was not found.'
Validate-YamlWindowsPaths $Config

$ReleaseName = 'smart-parking-' + (Get-Date -Format 'yyyyMMdd-HHmmss')
$ReleaseDirectory = Join-Path $OutputDirectory $ReleaseName
New-Item -ItemType Directory -Path $ReleaseDirectory -Force | Out-Null

Copy-Item -LiteralPath $Executable -Destination $ReleaseDirectory -Force
Copy-Item -LiteralPath $Config -Destination $ReleaseDirectory -Force

$PrinterDLL = Join-Path $BinDirectory 'CsnPrinterLibs.dll'
if (-not (Copy-OptionalFile $PrinterDLL $ReleaseDirectory)) {
    Write-Warning 'CsnPrinterLibs.dll was not found. Printing will be unavailable unless it is added before deployment.'
}

if ($IncludeUploads) {
    $Uploads = Join-Path $ProjectRoot 'uploads'
    if (Test-Path -LiteralPath $Uploads -PathType Container) {
        Copy-Item -LiteralPath $Uploads -Destination (Join-Path $ReleaseDirectory 'uploads') -Recurse -Force
    } else {
        Write-Warning 'uploads directory was not found; no local images were included.'
    }
}

if ($IncludeDatabase) {
    $AppData = [Environment]::GetFolderPath([Environment+SpecialFolder]::ApplicationData)
    $DatabaseDirectory = Join-Path $AppData 'smart-parking'
    $Database = Join-Path $DatabaseDirectory 'lc_garage.db'
    if (Test-Path -LiteralPath $Database -PathType Leaf) {
        $DatabasePackageDirectory = Join-Path $ReleaseDirectory 'data\AppData\smart-parking'
        New-Item -ItemType Directory -Path $DatabasePackageDirectory -Force | Out-Null
        Copy-Item -LiteralPath $Database -Destination $DatabasePackageDirectory -Force
        Copy-OptionalFile ($Database + '-wal') $DatabasePackageDirectory | Out-Null
        Copy-OptionalFile ($Database + '-shm') $DatabasePackageDirectory | Out-Null
        Write-Warning 'Database files were copied. Stop the source application before deployment to guarantee a consistent SQLite backup.'
    } else {
        Write-Warning "Database was not found: $Database"
    }
}

$Readme = @"
Smart Parking deployment package

Contents:
- smart-parking.exe: Wails desktop application
- config.yaml: production configuration. Review it before first start.
- CsnPrinterLibs.dll: required when the CSN ticket printer is used.

Prerequisites:
- Windows x64
- Microsoft Edge WebView2 Evergreen Runtime
- Allow inbound TCP 8888 when edge devices or the central payment machine connect to this host.

Before starting:
1. Set system.gate-simulator to false in config.yaml.
2. Set the production MQTT, camera, and ffmpeg configuration in config.yaml.
3. For Windows paths in YAML, use forward slashes (D:/SmartParking/data) or
   single quotes ('D:\SmartParking\data'). Do not use double-quoted paths with
   backslashes such as "D:\SmartParking\data"; YAML treats backslashes as escapes.
4. Start smart-parking.exe with this folder as its working directory.

Database:
- Default path: %APPDATA%\smart-parking\lc_garage.db for the Windows account that starts the application.
- If a data folder is included, copy data\AppData\smart-parking\* to that exact path after the application is stopped.

Local images:
- Copy the included uploads folder next to smart-parking.exe when historical local images must be retained.
"@
Set-Content -LiteralPath (Join-Path $ReleaseDirectory 'DEPLOYMENT.txt') -Value $Readme -Encoding UTF8

Write-Host ''
Write-Host "Release package created: $ReleaseDirectory" -ForegroundColor Green
Write-Host 'Deploy the complete directory to the production machine.' -ForegroundColor Green