Set-StrictMode -Version Latest
$ErrorActionPreference = 'Stop'

$script:LoaderRoot = Split-Path -Parent $MyInvocation.MyCommand.Path
$script:ConfigPath = Join-Path -Path $script:LoaderRoot -ChildPath 'config.json'
$script:ConfigCache = $null

function Get-ProjectStructureConfig {
    if ($null -ne $script:ConfigCache) {
        return $script:ConfigCache
    }

    if (Test-Path -LiteralPath $script:ConfigPath) {
        try {
            $raw = Get-Content -LiteralPath $script:ConfigPath -Raw -ErrorAction Stop
            if ($raw.Trim().Length -gt 0) {
                $script:ConfigCache = $raw | ConvertFrom-Json
                return $script:ConfigCache
            }
        }
        catch {
            Write-Warning "Failed to parse config.json: $($_.Exception.Message)"
        }
    }

    $script:ConfigCache = [pscustomobject]@{}
    return $script:ConfigCache
}

function Get-ConfigValue {
    param(
        [Parameter(Mandatory)] [string]$Name,
        $Default = $null
    )

    $config = Get-ProjectStructureConfig
    if ($config.PSObject.Properties.Name -contains $Name) {
        $value = $config.$Name
        if ($null -ne $value -and ($value -isnot [string] -or $value.Trim().Length -gt 0)) {
            return $value
        }
    }

    return $Default
}

function Get-StructDirectory {
    $value = Get-ConfigValue -Name 'structDir'
    if ($null -eq $value -or [string]::IsNullOrWhiteSpace($value)) {
        return $script:LoaderRoot
    }

    if ([System.IO.Path]::IsPathRooted($value)) {
        $resolved = Resolve-Path -LiteralPath $value -ErrorAction SilentlyContinue
        if ($null -ne $resolved) { return $resolved.Path }
        return $value
    }

    $candidate = Join-Path -Path $script:LoaderRoot -ChildPath $value
    $resolvedCandidate = Resolve-Path -LiteralPath $candidate -ErrorAction SilentlyContinue
    if ($null -ne $resolvedCandidate) { return $resolvedCandidate.Path }
    return $candidate
}

function Get-ProjectsRoot {
    $value = Get-ConfigValue -Name 'projectsRoot'
    if ($null -eq $value -or [string]::IsNullOrWhiteSpace($value)) {
        $structDir = Get-StructDirectory
        $parent = Split-Path -Parent $structDir
        if ($null -eq $parent -or $parent.Length -eq 0 -or $parent -eq $structDir) {
            return $structDir
        }
        return $parent
    }

    if ([System.IO.Path]::IsPathRooted($value)) {
        $resolved = Resolve-Path -LiteralPath $value -ErrorAction SilentlyContinue
        if ($null -ne $resolved) { return $resolved.Path }
        return $value
    }

    $candidate = Join-Path -Path $script:LoaderRoot -ChildPath $value
    $resolvedCandidate = Resolve-Path -LiteralPath $candidate -ErrorAction SilentlyContinue
    if ($null -ne $resolvedCandidate) { return $resolvedCandidate.Path }
    return $candidate
}

function Get-ProjectPathFromUser {
    param(
        [string]$Prompt = "Paste the project path to deploy in"
    )

    do {
        $inputPath = Read-Host -Prompt $Prompt
        if ([string]::IsNullOrWhiteSpace($inputPath)) {
            Write-Warning "Path cannot be empty. Please try again."
            continue
        }

        # Remove quotes if present
        $inputPath = $inputPath.Trim('"', "'")

        # Try to resolve the path
        try {
            if (Test-Path -LiteralPath $inputPath -PathType Container) {
                $resolved = Resolve-Path -LiteralPath $inputPath -ErrorAction Stop
                return $resolved.Path
            }
            else {
                Write-Warning "Path does not exist or is not a directory: $inputPath"
                $retry = Read-Host "Try again? (Y/N)"
                if ($retry -notmatch '^[Yy]') {
                    return $null
                }
            }
        }
        catch {
            Write-Warning "Invalid path: $($_.Exception.Message)"
            $retry = Read-Host "Try again? (Y/N)"
            if ($retry -notmatch '^[Yy]') {
                return $null
            }
        }
    } while ($true)
}

function Use-IsoDailyFormat {
    $dailyFormat = Get-ConfigValue -Name 'dailyFormat' -Default $true
    
    # Handle backward compatibility with boolean values
    if ($dailyFormat -is [bool]) {
        return $dailyFormat
    }
    
    # Handle string values
    if ($dailyFormat -is [string]) {
        $formatStr = $dailyFormat.Trim()
        # ISO format contains YYYY-MM-DD pattern
        if ($formatStr -match 'YYYY-MM-DD' -or $formatStr -match '\d{4}-\d{2}-\d{2}') {
            return $true
        }
        # daily_YYMMDD or other formats are not ISO
        return $false
    }
    
    # Default to false (not ISO format) for unknown types
    return $false
}

function Use-7Zip {
    $zipper = Get-ConfigValue -Name 'zipper' -Default $true
    
    # Handle backward compatibility with boolean values
    if ($zipper -is [bool]) {
        return $zipper
    }
    
    # Handle string values
    if ($zipper -is [string]) {
        $zipperStr = $zipper.Trim().ToLower()
        return ($zipperStr -eq '7z')
    }
    
    # Default to false (use zip) for unknown types
    return $false
}

function Get-ZipCompressionLevel {
    $value = Get-ConfigValue -Name 'compression' -Default 9
    if ($value -is [string]) {
        $parsed = 0
        if ([int]::TryParse($value, [ref]$parsed)) {
            $value = $parsed
        }
    }

    if ($value -isnot [int]) {
        return 9
    }

    return [Math]::Min(9, [Math]::Max(0, $value))
}

# If script is run directly (not dot-sourced), prompt for project path and deploy
# When dot-sourced, InvocationName is '.'; when run directly, it's the script path or name
if ($MyInvocation.InvocationName -ne '.') {
    $projectPath = Get-ProjectPathFromUser
    if ($null -ne $projectPath) {
        Write-Host "`nDeploying to: $projectPath" -ForegroundColor Cyan
        
        # Find UpdateProjectBatches.ps1 in the same directory as ConfigLoader.ps1
        $updateScript = Join-Path -Path $script:LoaderRoot -ChildPath 'UpdateProjectBatches.ps1'
        if (Test-Path -LiteralPath $updateScript) {
            Write-Host "Running UpdateProjectBatches.ps1...`n" -ForegroundColor Yellow
            & powershell -NoProfile -ExecutionPolicy Bypass -File $updateScript -ProjectPath $projectPath
            $exitCode = $LASTEXITCODE
            if ($exitCode -eq 0) {
                Write-Host "`nDeployment completed successfully." -ForegroundColor Green
            }
            else {
                Write-Host "`nDeployment completed with errors (exit code: $exitCode)." -ForegroundColor Red
            }
            exit $exitCode
        }
        else {
            Write-Warning "UpdateProjectBatches.ps1 not found in $script:LoaderRoot"
            Write-Host "Project path: $projectPath" -ForegroundColor Green
            return $projectPath
        }
    }
    else {
        Write-Host "No project path provided." -ForegroundColor Yellow
        exit 1
    }
}