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

BeforeAll {
    $repoRoot = Split-Path (Split-Path $PSScriptRoot -Parent) -Parent
    foreach ($f in @(
            'src/Normalization/New-PersonaMembershipRecord.ps1'
            'src/Normalization/New-PersonaUserRecord.ps1'
            'src/RuleEngine/Test-PersonaCondition.ps1'
            'src/RuleEngine/Test-PersonaConditionGroup.ps1'
            'src/RuleEngine/Test-PersonaRule.ps1'
            'src/RuleEngine/Resolve-UserPersona.ps1'
        )) { . (Join-Path $repoRoot $f) }

    $script:user = New-PersonaUserRecord `
        -AccountObjectId '00000000-0000-0000-0000-000000000105' `
        -UserPrincipalName 'ellis.minimal@example.invalid' `
        -UserType 'Member' `
        -StoredPersona 'Employee'

    function New-NonMatchingRule {
        param([string] $Id, [int] $Priority)
        [pscustomobject]@{
            id = $Id; priority = $Priority; persona = 'Tier0-Admin'; enabled = $true
            match = [pscustomobject]@{
                operator = 'all'
                conditions = @([pscustomobject]@{ type = 'property'; property = 'Department'; operator = 'equals'; value = 'NoSuchDepartment' })
            }
        }
    }
}

Describe 'Unclassified outcome (FR-010)' {

    It 'is the result when every enabled rule evaluates successfully and none match' {
        $result = Resolve-UserPersona -UserRecord $user -Rules @(
            New-NonMatchingRule -Id 'R-010' -Priority 10
            New-NonMatchingRule -Id 'R-020' -Priority 20
        )

        $result.Outcome | Should -Be 'Unclassified'
        $result.CalculatedPersona | Should -Be 'Unclassified'
        $result.MatchedRuleId | Should -BeNullOrEmpty
    }

    It 'evaluates every enabled rule before concluding' {
        $result = Resolve-UserPersona -UserRecord $user -Rules @(
            New-NonMatchingRule -Id 'R-010' -Priority 10
            New-NonMatchingRule -Id 'R-020' -Priority 20
            New-NonMatchingRule -Id 'R-030' -Priority 30
        )
        $result.RulesEvaluated | Should -Be 3
    }

    It 'is the result for an empty rule set' {
        $result = Resolve-UserPersona -UserRecord $user -Rules @()
        $result.Outcome | Should -Be 'Unclassified'
    }

    It 'is the result when every rule is disabled' {
        $disabled = New-NonMatchingRule -Id 'R-010' -Priority 10
        $disabled.enabled = $false

        $result = Resolve-UserPersona -UserRecord $user -Rules @($disabled)
        $result.Outcome | Should -Be 'Unclassified'
        $result.RulesEvaluated | Should -Be 0
    }

    It 'is reported distinctly from EvaluationError' {
        # Both mean "no persona was assigned", but only one means the engine failed.
        # Conflating them would hide data-availability problems inside a normal-
        # looking result bucket.
        $result = Resolve-UserPersona -UserRecord $user -Rules @(New-NonMatchingRule -Id 'R-010' -Priority 10)

        $result.Outcome | Should -Not -Be 'EvaluationError'
        $result.EvaluationErrorReason | Should -BeNullOrEmpty
    }

    It 'preserves the stored persona on the result for later comparison' {
        (Resolve-UserPersona -UserRecord $user -Rules @(New-NonMatchingRule -Id 'R-010' -Priority 10)).StoredPersona |
            Should -Be 'Employee'
    }
}