$script:ModuleRoot = Split-Path -Parent $PSScriptRoot
$script:ModuleManifest = Join-Path -Path $script:ModuleRoot -ChildPath 'Merge-DSCConfigurationData.psd1'

Import-Module $script:ModuleManifest -Force

Describe 'Merge-DSCConfigurationData Extends' {
    It 'keeps the existing hashtable merge behavior' {
        $Template = @{
            Parameters = @{
                DomainFQDN = @{
                    Type = 'string'
                    Required = $true
                    DefaultValue = 'example.local'
                }
            }
        }

        $Deployment = @{
            Parameters = @{
                DomainFQDN = @{
                    Value = 'contoso.local'
                }
            }
        }

        $Result = Merge-DSCConfigurationData -Template $Template -Deployment $Deployment

        $Result.Parameters.DomainFQDN.Type | Should Be 'string'
        $Result.Parameters.DomainFQDN.Required | Should Be $true
        $Result.Parameters.DomainFQDN.Value | Should Be 'contoso.local'
    }

    It 'merges a child template with Metadata.Extends' {
        $DefaultPath = Join-Path -Path $TestDrive -ChildPath 'Default.psd1'
        $ChildPath = Join-Path -Path $TestDrive -ChildPath 'Contoso.psd1'

        @'
@{
    Metadata = @{
        TemplateType = 'Environment'
        Name = 'Default'
    }
    Parameters = @{
        DomainFQDN = @{
            Type = 'string'
            Required = $true
            DefaultValue = 'example.local'
        }
        DomainNetBIOS = @{
            Type = 'string'
            Required = $true
        }
    }
    Resources = @{
        NonNodeData = @{
            RequiredModules = @(
                @{
                    Name = 'ActiveDirectoryDsc'
                    Version = '6.7.1'
                }
            )
        }
    }
}
'@ | Set-Content -Path $DefaultPath -Encoding UTF8

        @'
@{
    Metadata = @{
        TemplateType = 'Environment'
        Name = 'Contoso'
        Extends = './Default.psd1'
    }
    Parameters = @{
        DomainFQDN = @{
            Value = 'contoso.local'
        }
        DomainNetBIOS = @{
            Value = 'CONTOSO'
        }
    }
}
'@ | Set-Content -Path $ChildPath -Encoding UTF8

        $Result = Merge-DSCConfigurationData -Path $ChildPath -PassThru

        $Result.Files.Count | Should Be 2
        [System.IO.Path]::GetFileName($Result.Files[0]) | Should Be 'Default.psd1'
        [System.IO.Path]::GetFileName($Result.Files[1]) | Should Be 'Contoso.psd1'
        $Result.ConfigurationData.Parameters.DomainFQDN.Type | Should Be 'string'
        $Result.ConfigurationData.Parameters.DomainFQDN.Value | Should Be 'contoso.local'
        $Result.ConfigurationData.Parameters.DomainNetBIOS.Required | Should Be $true
        $Result.ConfigurationData.Parameters.DomainNetBIOS.Value | Should Be 'CONTOSO'
        $Result.ConfigurationData.Resources.NonNodeData.RequiredModules[0].Name | Should Be 'ActiveDirectoryDsc'
        $Result.ConfigurationData.ContainsKey('Metadata') | Should Be $false
    }

    It 'detects circular Metadata.Extends references' {
        $APath = Join-Path -Path $TestDrive -ChildPath 'A.psd1'
        $BPath = Join-Path -Path $TestDrive -ChildPath 'B.psd1'

        @'
@{
    Metadata = @{
        Extends = './B.psd1'
    }
}
'@ | Set-Content -Path $APath -Encoding UTF8

        @'
@{
    Metadata = @{
        Extends = './A.psd1'
    }
}
'@ | Set-Content -Path $BPath -Encoding UTF8

        { Merge-DSCConfigurationData -Path $APath } | Should Throw
    }

    It 'exports importable PSD1 files with quoted metadata keys' {
        $Path = Join-Path -Path $TestDrive -ChildPath 'Export.psd1'

        @{
            Metadata = @{
                Description = @{
                    'de-DE' = 'Deutsch'
                    'en-US' = 'English'
                }
            }
        } | Export-PowerShellDataFile -Path $Path -Force

        $Data = Import-PowerShellDataFile -Path $Path
        $Data.Metadata.Description['de-DE'] | Should Be 'Deutsch'
        $Data.Metadata.Description['en-US'] | Should Be 'English'
    }

    It 'creates materialized deployment data without exporting by default' {
        $DefaultPath = Join-Path -Path $TestDrive -ChildPath 'Default.psd1'
        $ChildPath = Join-Path -Path $TestDrive -ChildPath 'Contoso.psd1'

        @'
@{
    Metadata = @{
        TemplateType = 'Environment'
        Name = 'Default'
    }
    Parameters = @{
        DomainFQDN = @{
            Type = 'string'
            Required = $true
        }
    }
    Resources = @{
        AllNodes = @(
            @{
                NodeName = '*'
                PSDSCAllowPlainTextPassword = $true
            }
        )
    }
}
'@ | Set-Content -Path $DefaultPath -Encoding UTF8

        @'
@{
    Metadata = @{
        TemplateType = 'Environment'
        Name = 'Contoso'
        Extends = './Default.psd1'
    }
    Parameters = @{
        DomainFQDN = @{
            Value = 'contoso.local'
        }
    }
}
'@ | Set-Content -Path $ChildPath -Encoding UTF8

        $Result = New-DSCConfigurationDataDeployment `
            -Name 'Contoso-Test' `
            -DeploymentId '123' `
            -SourceTemplatePath $ChildPath `
            -AllNodes @(
                @{
                    NodeName = 'Node01'
                    RunCentralAdministration = $true
                }
            )

        $Result.Metadata.TemplateType | Should Be 'Deployment'
        $Result.Metadata.Sources.Files.Count | Should Be 2
        $Result.Parameters.DomainFQDN.Value | Should Be 'contoso.local'
        $Result.Resources.AllNodes[0].NodeName | Should Be 'Node01'
        $Result.Resources.AllNodes[0].PSDSCAllowPlainTextPassword | Should Be $true
    }

    It 'exports materialized deployment data as PSD1' {
        $DefaultPath = Join-Path -Path $TestDrive -ChildPath 'Default.psd1'
        $ChildPath = Join-Path -Path $TestDrive -ChildPath 'Contoso.psd1'
        $DeploymentPath = Join-Path -Path $TestDrive -ChildPath 'Deployments\Deployment_123.psd1'

        @'
@{
    Metadata = @{
        TemplateType = 'Environment'
        Name = 'Default'
    }
    Parameters = @{
        DomainFQDN = @{
            Type = 'string'
            Required = $true
        }
    }
    Variables = @{
    }
}
'@ | Set-Content -Path $DefaultPath -Encoding UTF8

        @'
@{
    Metadata = @{
        TemplateType = 'Environment'
        Name = 'Contoso'
        Extends = './Default.psd1'
    }
    Parameters = @{
        DomainFQDN = @{
            Value = 'contoso.local'
        }
    }
}
'@ | Set-Content -Path $ChildPath -Encoding UTF8

        $Result = New-DSCConfigurationDataDeployment `
            -Path $DeploymentPath `
            -Name 'Contoso-Test' `
            -DeploymentId '123' `
            -SourceTemplatePath $ChildPath `
            -AllNodes @(
                @{
                    NodeName = 'Node01'
                    RunCentralAdministration = $true
                }
            ) `
            -UseRelativePaths `
            -Export `
            -Format PowerShellDataFile `
            -Force `
            -PassThru

        $DeploymentPath | Should Exist
        $Result.ConfigurationData.Metadata.TemplateType | Should Be 'Deployment'
        $Result.ConfigurationData.Metadata.Sources.Files.Count | Should Be 2
        $Result.ConfigurationData.Metadata.Sources.Files[0].Hash.Length | Should Be 64
        $Result.ConfigurationData.Metadata.Sources.Files[0].Algorithm | Should Be 'SHA256'
        $Result.ConfigurationData.Parameters.DomainFQDN.Value | Should Be 'contoso.local'
        $Result.ConfigurationData.Resources.AllNodes[0].NodeName | Should Be 'Node01'
        $Result.ConfigurationData.Resources.AllNodes[0].RunCentralAdministration | Should Be $true

        $Imported = Import-PowerShellDataFile -Path $DeploymentPath
        $Imported.Metadata.Name | Should Be 'Contoso-Test'
        $Imported.Metadata.Sources.Templates.Count | Should Be 1

        $Validation = Test-DSCConfigurationDataDeployment -Path $DeploymentPath -PassThru
        $Validation.IsValid | Should Be $true
        $Validation.IsStale | Should Be $false
    }

    It 'exports materialized deployment data as JSON' {
        $DefaultPath = Join-Path -Path $TestDrive -ChildPath 'Default.psd1'
        $DeploymentPath = Join-Path -Path $TestDrive -ChildPath 'Deployment_123.json'

        @'
@{
    Parameters = @{
        DomainFQDN = @{
            Type = 'string'
            Value = 'contoso.local'
        }
    }
    Variables = @{
    }
}
'@ | Set-Content -Path $DefaultPath -Encoding UTF8

        New-DSCConfigurationDataDeployment `
            -Path $DeploymentPath `
            -Name 'Contoso-Test' `
            -DeploymentId '123' `
            -SourceTemplatePath $DefaultPath `
            -Export `
            -Format Json `
            -Force

        $DeploymentPath | Should Exist
        $Imported = Get-Content -Path $DeploymentPath -Raw | ConvertFrom-Json
        $Imported.Metadata.TemplateType | Should Be 'Deployment'
        $Imported.Parameters.DomainFQDN.Value | Should Be 'contoso.local'
    }

    It 'detects changed deployment source files by hash' {
        $DefaultPath = Join-Path -Path $TestDrive -ChildPath 'Default.psd1'
        $DeploymentPath = Join-Path -Path $TestDrive -ChildPath 'Deployment_123.psd1'

        @'
@{
    Parameters = @{
        DomainFQDN = @{
            Type = 'string'
            Value = 'contoso.local'
        }
    }
    Variables = @{
    }
}
'@ | Set-Content -Path $DefaultPath -Encoding UTF8

        New-DSCConfigurationDataDeployment `
            -Path $DeploymentPath `
            -Name 'Contoso-Test' `
            -DeploymentId '123' `
            -SourceTemplatePath $DefaultPath `
            -AllNodes @(
                @{
                    NodeName = 'Node01'
                }
            ) `
            -Export `
            -Force

        @'
@{
    Parameters = @{
        DomainFQDN = @{
            Type = 'string'
            Value = 'changed.local'
        }
    }
    Variables = @{
    }
}
'@ | Set-Content -Path $DefaultPath -Encoding UTF8

        $Validation = Test-DSCConfigurationDataDeployment -Path $DeploymentPath -PassThru
        $Validation.IsValid | Should Be $true
        $Validation.IsStale | Should Be $true
        @($Validation.Issues | Where-Object { $_.Code -eq 'SourceChanged' }).Count | Should Be 1
    }

    It 'prevents overriding a sealed parameter definition' {
        $Template = @{
            Parameters = @{
                DomainNetBIOS = @{
                    Type = 'string'
                    Value = 'CONTOSO'
                    Sealed = $true
                }
            }
        }

        $Deployment = @{
            Parameters = @{
                DomainNetBIOS = @{
                    Value = 'OTHER'
                }
            }
        }

        { Merge-DSCConfigurationData -Template $Template -Deployment $Deployment } | Should Throw
    }

    It 'prevents adding values below a sealed resource tree' {
        $Template = @{
            Resources = @{
                NonNodeData = @{
                    Services = @{
                        SharePoint = @{
                            Farm = @{
                                ManagedAccounts = @{
                                    Sealed = $true
                                    FarmAccount = "[parameters('FarmCredential')]"
                                }
                            }
                        }
                    }
                }
            }
        }

        $Deployment = @{
            Resources = @{
                NonNodeData = @{
                    Services = @{
                        SharePoint = @{
                            Farm = @{
                                ManagedAccounts = @{
                                    SearchAccount = "[parameters('SearchCredential')]"
                                }
                            }
                        }
                    }
                }
            }
        }

        { Merge-DSCConfigurationData -Template $Template -Deployment $Deployment } | Should Throw
    }
}