#Requires -Modules @{ ModuleName = 'Pester'; ModuleVersion = '5.0.0' }

<#
    SC-009, VR-003 half: every safety condition produces a finding.

    Layer 3 asks whether a configuration makes sense. These tests are about layer 4,
    which asks what happens to the directory if it runs - a coherent configuration can
    still be a silent no-op or a change nobody declared.

    Several findings change severity with -EnforcementEnabled. Both cases are asserted
    for each: the same configuration carries very different risk in preview and in
    enforcement, and a validator that ignored the difference would either block
    harmless previews or wave through real writes.
#>

BeforeAll {
    $repoRoot = Split-Path (Split-Path $PSScriptRoot -Parent) -Parent
    . (Join-Path $repoRoot 'tests/TestHelpers.ps1')
    foreach ($file in (Get-PersonaSourceFile -RepoRoot $repoRoot)) { . $file }

    $script:corpus = Join-Path $repoRoot 'tests/TestData/InvalidConfigs'
    $script:baseline = Join-Path $script:corpus 'baseline-deployed.json'

    function Get-SafetyFinding {
        param(
            [string] $Fixture,
            [string] $Code,
            [switch] $EnforcementEnabled,
            [string] $PreviousConfigPath
        )

        $document = Get-Content -LiteralPath (Join-Path $script:corpus "$Fixture.json") -Raw | ConvertFrom-Json -Depth 32

        $params = @{ Document = $document; EnforcementEnabled = $EnforcementEnabled }
        if ($PreviousConfigPath) { $params['PreviousConfigPath'] = $PreviousConfigPath }

        @(Test-PersonaConfigurationSafety @params | Where-Object Code -EQ $Code)
    }
}

Describe 'Safety validation, VR-003 conditions (SC-009)' {

    It 'detects a blank target attribute and blocks it under enforcement' {
        $findings = Get-SafetyFinding -Fixture 'PE-SAF-001-blank-target-production' -Code 'PE-SAF-001' -EnforcementEnabled

        $findings.Count | Should -Be 1
        $findings[0].Severity | Should -Be 'Error'
    }

    It 'reports the same blank target attribute as a Warning in preview' {
        # In preview there is nothing to write, so the configuration is merely
        # pointless rather than dangerous.
        $findings = Get-SafetyFinding -Fixture 'PE-SAF-001-blank-target-production' -Code 'PE-SAF-001'

        $findings.Count | Should -Be 1
        $findings[0].Severity | Should -Be 'Warning'
    }

    It 'detects an unsupported writable attribute' {
        # 'department' is authoritative in the sync source. Holding permission to
        # write it is not the same as owning it.
        $findings = Get-SafetyFinding -Fixture 'PE-SAF-002-unsupported-writable-attribute' -Code 'PE-SAF-002'

        $findings.Count | Should -BeGreaterThan 0
        $findings[0].Severity | Should -Be 'Error'
        $findings[0].Description | Should -Match 'department'
    }

    It 'detects enabled group rules while group retrieval is disabled' {
        $findings = Get-SafetyFinding -Fixture 'PE-SAF-003-group-rules-without-group-retrieval' -Code 'PE-SAF-003'

        $findings.Count | Should -BeGreaterThan 0
        $findings[0].Severity | Should -Be 'Error'
        $findings[0].Location | Should -Be 'dataSources.groups.enabled'
    }

    It 'detects a configuration version downgrade against the deployed baseline' {
        $findings = Get-SafetyFinding -Fixture 'PE-SAF-004-version-downgrade' -Code 'PE-SAF-004' `
            -PreviousConfigPath $script:baseline -EnforcementEnabled

        $findings.Count | Should -BeGreaterThan 0
        $findings[0].Severity | Should -Be 'Error'
        $findings[0].Location | Should -Be 'configVersion'
    }

    It 'detects a rule removed without a version change' {
        $findings = Get-SafetyFinding -Fixture 'PE-SAF-005-rule-removed-without-version-change' -Code 'PE-SAF-005' `
            -PreviousConfigPath $script:baseline -EnforcementEnabled

        $findings.Count | Should -BeGreaterThan 0
        $findings[0].Severity | Should -Be 'Error'
        $findings[0].Description | Should -Match 'RULE-0900-EMPLOYEE'
    }

    It 'accepts a rule removal when the version was raised to declare it' {
        $document = Get-Content -LiteralPath (Join-Path $script:corpus 'PE-SAF-005-rule-removed-without-version-change.json') -Raw | ConvertFrom-Json -Depth 32
        $document.configVersion = '1.1.0'

        $findings = @(Test-PersonaConfigurationSafety -Document $document -PreviousConfigPath $script:baseline -EnforcementEnabled |
                Where-Object Code -EQ 'PE-SAF-005')

        $findings.Count | Should -Be 0
    }

    It 'detects condition tracing enabled without acknowledgement' {
        $findings = Get-SafetyFinding -Fixture 'PE-SAF-006-tracing-without-acknowledgement' -Code 'PE-SAF-006'

        $findings.Count | Should -Be 1
        $findings[0].Severity | Should -Be 'Error'
        $findings[0].Location | Should -Be 'logging.traceConditionValues'
    }

    It 'accepts tracing when it is acknowledged in the same configuration' {
        $document = Get-Content -LiteralPath (Join-Path $script:corpus 'PE-SAF-006-tracing-without-acknowledgement.json') -Raw | ConvertFrom-Json -Depth 32
        $document.logging | Add-Member -NotePropertyName 'acknowledgeConditionTracing' -NotePropertyValue $true

        @(Test-PersonaConfigurationSafety -Document $document | Where-Object Code -EQ 'PE-SAF-006') | Should -BeNullOrEmpty
    }

    It 'detects a save that would overwrite an existing configuration with no backup' {
        $document = Get-Content -LiteralPath $script:baseline -Raw | ConvertFrom-Json -Depth 32

        $findings = @(Test-PersonaConfigurationSafety -Document $document -SavePath $script:baseline |
                Where-Object Code -EQ 'PE-SAF-007')

        $findings.Count | Should -Be 1
        $findings[0].Severity | Should -Be 'Error'
    }

    It 'accepts the same save when a backup is planned' {
        $document = Get-Content -LiteralPath $script:baseline -Raw | ConvertFrom-Json -Depth 32

        @(Test-PersonaConfigurationSafety -Document $document -SavePath $script:baseline -BackupPlanned |
            Where-Object Code -EQ 'PE-SAF-007') | Should -BeNullOrEmpty
    }
}

Describe 'A skipped check is reported as skipped, never as a pass' {

    It 'reports an Information finding when no baseline is supplied' {
        # Silence would be read as approval. The comparison checks did not run, and
        # the output has to say so.
        $document = Get-Content -LiteralPath $script:baseline -Raw | ConvertFrom-Json -Depth 32

        $findings = @(Test-PersonaConfigurationSafety -Document $document | Where-Object Code -EQ 'PE-SAF-004')

        $findings.Count | Should -Be 1
        $findings[0].Severity | Should -Be 'Information'
        $findings[0].Description | Should -Match 'not a pass'
    }

    It 'does not block on the skipped-check notice' {
        $document = Get-Content -LiteralPath $script:baseline -Raw | ConvertFrom-Json -Depth 32

        @(Test-PersonaConfigurationSafety -Document $document | Where-Object Severity -EQ 'Error') | Should -BeNullOrEmpty
    }
}

Describe 'Safety findings carry everything VR-004 requires' {

    It 'gives every finding a severity, code, location, description, resolution, and layer' {
        foreach ($fixture in (Get-ChildItem -Path $script:corpus -Filter 'PE-SAF-*.json')) {
            $document = Get-Content -LiteralPath $fixture.FullName -Raw | ConvertFrom-Json -Depth 32

            foreach ($finding in (Test-PersonaConfigurationSafety -Document $document -PreviousConfigPath $script:baseline)) {
                $finding.Severity | Should -BeIn @('Error', 'Warning', 'Information')
                $finding.Code | Should -Match '^PE-SAF-\d{3}$'
                $finding.Location | Should -Not -BeNullOrEmpty
                $finding.Description | Should -Not -BeNullOrEmpty
                $finding.SuggestedResolution | Should -Not -BeNullOrEmpty
                $finding.Layer | Should -Be 'Safety'
            }
        }
    }
}