Set-StrictMode -Version 2.0

function ConvertFrom-ThemeColor {
    param([Parameter(Mandatory=$true)][string]$Value)
    $hex = $Value.Trim().TrimStart('#')
    if ($hex -notmatch '^[0-9A-Fa-f]{6}$') {
        throw "Couleur invalide dans un thème : '$Value'. Utiliser #RRGGBB."
    }
    return [System.Drawing.Color]::FromArgb(
        [Convert]::ToInt32($hex.Substring(0,2),16),
        [Convert]::ToInt32($hex.Substring(2,2),16),
        [Convert]::ToInt32($hex.Substring(4,2),16)
    )
}

function Get-DeployCenterThemeNames {
    param([Parameter(Mandatory=$true)][string]$ThemesRoot)
    $names = @()
    foreach ($file in (Get-ChildItem -LiteralPath $ThemesRoot -Filter '*.psd1' -File -ErrorAction SilentlyContinue)) {
        if ($file.BaseName -match '^[A-Za-z0-9_-]+$') { $names += $file.BaseName }
    }
    return @($names | Sort-Object -Unique)
}

function Import-DeployCenterTheme {
    param(
        [Parameter(Mandatory=$true)][string]$ThemesRoot,
        [Parameter(Mandatory=$true)][string]$ThemeName
    )
    if ($ThemeName -notmatch '^[A-Za-z0-9_-]+$') { throw "Nom de thème invalide : $ThemeName" }
    $path = Join-Path $ThemesRoot ($ThemeName + '.psd1')
    if (-not (Test-Path -LiteralPath $path -PathType Leaf)) { throw "Thème introuvable : $ThemeName" }
    $data = Import-PowerShellDataFile -LiteralPath $path
    $required = @('Background','Panel','PanelAlt','Text','Secondary','Accent','Success','Border','Danger')
    foreach ($key in $required) {
        if (-not $data.ContainsKey($key)) { throw "Le thème '$ThemeName' ne contient pas la clé '$key'." }
    }
    $theme = @{}
    foreach ($key in $required) { $theme[$key] = ConvertFrom-ThemeColor -Value ([string]$data[$key]) }
    foreach ($key in @('TableHeader','TableRowEven','TableRowOdd')) {
        if ($data.ContainsKey($key)) { $theme[$key] = ConvertFrom-ThemeColor -Value ([string]$data[$key]) }
        else { $theme[$key] = $theme.PanelAlt }
    }
    $buttonDefaults = @{
        Button = @{ Background=$theme.PanelAlt; Foreground=$theme.Text; Border=$theme.Border; HoverBackground=$theme.Panel; PressedBackground=$theme.Border; DisabledBackground=$theme.Panel; DisabledForeground=$theme.Secondary }
        PrimaryButton = @{ Background=$theme.Accent; Foreground=[System.Drawing.Color]::White; Border=$theme.Accent; HoverBackground=$theme.Accent; PressedBackground=$theme.Accent; DisabledBackground=$theme.PanelAlt; DisabledForeground=$theme.Secondary }
        DangerButton = @{ Background=$theme.Danger; Foreground=[System.Drawing.Color]::White; Border=$theme.Danger; HoverBackground=$theme.Danger; PressedBackground=$theme.Danger; DisabledBackground=$theme.PanelAlt; DisabledForeground=$theme.Secondary }
    }
    foreach ($role in @('Button','PrimaryButton','DangerButton')) {
        $theme[$role] = @{}
        $provided = $data[$role]
        foreach ($property in @('Background','Foreground','Border','HoverBackground','PressedBackground','DisabledBackground','DisabledForeground')) {
            $raw = $null
            if ($provided -is [System.Collections.IDictionary] -and $provided.Contains($property)) { $raw = [string]$provided[$property] }
            if ([string]::IsNullOrWhiteSpace($raw)) { $theme[$role][$property] = $buttonDefaults[$role][$property] }
            else { $theme[$role][$property] = ConvertFrom-ThemeColor -Value $raw }
        }
    }
    return $theme
}

Export-ModuleMember -Function ConvertFrom-ThemeColor, Get-DeployCenterThemeNames, Import-DeployCenterTheme