# Tests\NetAppService.Tests.ps1
# Unit & Integration Tests for NetAppService Module

BeforeAll {
    $scriptDir = Split-Path -Parent $PSScriptRoot
    . (Join-Path $scriptDir "Modules\NetAppService.ps1")
}

Describe "NetAppService Unit Tests" -Tag "Mock", "Unit" {
    Context "Resolve-NetAppParameters Precedence & Resolution" {
        It "prefers explicit parameters over config defaults" {
            $cfg = @{
                NetApp = @{
                    ClusterEndpoint = "https://10.200.10.50"
                    Username = "config_user"
                    Password = "config_password"
                    DefaultSvm = "svm_config"
                    UseLive = $false
                    IgnoreSslErrors = $true
                }
            }

            $resolved = Resolve-NetAppParameters -ClusterEndpoint "https://10.200.10.99" -Username "explicit_user" -SvmName "svm_explicit" -Config $cfg
            $resolved.Endpoint | Should -Be "https://10.200.10.99"
            $resolved.Username | Should -Be "explicit_user"
            $resolved.SvmName | Should -Be "svm_explicit"
        }

        It "falls back to config values when parameters are empty" {
            $cfg = @{
                NetApp = @{
                    ClusterEndpoint = "https://10.200.10.50"
                    Username = "config_admin"
                    DefaultSvm = "svm_prod01"
                    UseLive = $false
                    IgnoreSslErrors = $true
                }
            }

            $resolved = Resolve-NetAppParameters -Config $cfg
            $resolved.Endpoint | Should -Be "https://10.200.10.50"
            $resolved.Username | Should -Be "config_admin"
            $resolved.SvmName | Should -Be "svm_prod01"
            $resolved.UseLive | Should -BeFalse
        }
    }

    Context "Mock Data Retrieval (Qtrees, Quotas, Shares)" {
        It "retrieves sample Qtrees with capacity and volume details" {
            $qtrees = Get-NetAppSampleQtrees
            $qtrees.Count | Should -BeGreaterThan 0

            $first = $qtrees[0]
            $first.QtreeName | Should -Not -BeNullOrEmpty
            $first.Volume | Should -Not -BeNullOrEmpty
            $first.SecurityStyle | Should -Not -BeNullOrEmpty
            $first.IsLive | Should -BeFalse
        }

        It "filters sample Qtrees by Volume name" {
            $filtered = Get-NetAppSampleQtrees -Filter "vol_cifs_share01"
            $filtered.Count | Should -Be 2
            foreach ($q in $filtered) {
                $q.Volume | Should -Be "vol_cifs_share01"
            }
        }

        It "retrieves sample Quota rules with Soft and Hard limits" {
            $quotas = Get-NetAppSampleQuotas
            $quotas.Count | Should -BeGreaterThan 0

            foreach ($q in $quotas) {
                $q.VolumeQtree | Should -Not -BeNullOrEmpty
                $q.QuotaType | Should -Not -BeNullOrEmpty
                $q.Target | Should -Not -BeNullOrEmpty
                $q.HardLimit | Should -Not -BeNullOrEmpty
            }
        }

        It "retrieves sample CIFS shares with paths and permissions" {
            $shares = Get-NetAppSampleShares
            $shares.Count | Should -BeGreaterThan 0

            foreach ($s in $shares) {
                $s.ShareName | Should -Not -BeNullOrEmpty
                $s.Path | Should -Not -BeNullOrEmpty
                $s.Comment | Should -Not -BeNullOrEmpty
                $s.AclSummary | Should -Not -BeNullOrEmpty
            }
        }
    }

    Context "Storage Action Operations (Demo Simulation Mode)" {
        It "simulates Qtree creation on specified volume" {
            $cfg = @{ NetApp = @{ UseLive = $false } }
            $res = New-NetAppQtreeAction -Volume "vol_cifs_share01" -QtreeName "qt_new_project" -SecurityStyle "ntfs" -Config $cfg
            $res.Success | Should -BeTrue
            $res.Message | Should -Match "qt_new_project"
            $res.Message | Should -Match "데모 모드"
        }

        It "simulates CIFS share creation with directory path" {
            $cfg = @{ NetApp = @{ UseLive = $false } }
            $res = New-NetAppShareAction -ShareName "Marketing_Share" -Path "/vol_cifs_share01/qt_marketing" -Comment "Marketing folder" -Config $cfg
            $res.Success | Should -BeTrue
            $res.Message | Should -Match "Marketing_Share"
            $res.Message | Should -Match "가상 생성"
        }

        It "simulates Quota policy adjustment with Soft and Hard limits" {
            $cfg = @{ NetApp = @{ UseLive = $false } }
            $res = Set-NetAppQuotaRule -Volume "vol_cifs_share01" -Qtree "qt_marketing" -SoftLimitGb 200 -HardLimitGb 250 -Config $cfg
            $res.Success | Should -BeTrue
            $res.Message | Should -Match "200GB"
            $res.Message | Should -Match "250GB"
        }
    }

    Context "Active DC Discovery: Edge Case Parsing (REST JSON Schema Variants)" {
        It "parses discovered_servers schema using 'server_name' property" {
            $mockRecord = [PSCustomObject]@{
                records = @(
                    [PSCustomObject]@{
                        svm = [PSCustomObject]@{ name = "svm_cifs_prod01" }
                        discovered_servers = @(
                            [PSCustomObject]@{
                                server_name = "dc04.corp.local"
                                server_ip   = "10.20.1.14"
                                server_type = "dc"
                                preference  = "preferred"
                                state       = "ok"
                                node        = [PSCustomObject]@{ name = "node-01" }
                            }
                        )
                    }
                )
            }
            Mock Invoke-NetAppRestRequest { return $mockRecord }
            $res = Get-NetAppActiveDc -ClusterEndpoint "https://fake-cluster" -SvmName "svm_cifs_prod01" -UseLive $true
            $res.ActiveDC | Should -Be "dc04.corp.local"
            $res.Node | Should -Be "node-01"
            $res.IsLive | Should -BeTrue
        }

        It "falls back to 'name' property when server_name is absent" {
            $mockRecord = [PSCustomObject]@{
                records = @(
                    [PSCustomObject]@{
                        svm = [PSCustomObject]@{ name = "svm_cifs_prod01" }
                        discovered_servers = @(
                            [PSCustomObject]@{
                                name        = "dc02.corp.local"
                                server_ip   = "10.10.1.12"
                                server_type = "dc"
                                preference  = "favored"
                                state       = "ok"
                            }
                        )
                    }
                )
            }
            Mock Invoke-NetAppRestRequest { return $mockRecord }
            $res = Get-NetAppActiveDc -ClusterEndpoint "https://fake-cluster" -SvmName "svm_cifs_prod01" -UseLive $true
            $res.ActiveDC | Should -Be "dc02.corp.local"
        }

        It "falls back to 'server' property when both server_name and name are absent" {
            $mockRecord = [PSCustomObject]@{
                records = @(
                    [PSCustomObject]@{
                        svm = [PSCustomObject]@{ name = "svm_cifs_prod01" }
                        discovered_servers = @(
                            [PSCustomObject]@{
                                server      = "dc03.corp.local"
                                server_ip   = "10.10.1.13"
                                server_type = "dc"
                                preference  = "regular"
                                state       = "ok"
                            }
                        )
                    }
                )
            }
            Mock Invoke-NetAppRestRequest { return $mockRecord }
            $res = Get-NetAppActiveDc -ClusterEndpoint "https://fake-cluster" -SvmName "svm_cifs_prod01" -UseLive $true
            $res.ActiveDC | Should -Be "dc03.corp.local"
        }

        It "falls back to 'server_ip' when no hostname is provided" {
            $mockRecord = [PSCustomObject]@{
                records = @(
                    [PSCustomObject]@{
                        svm = [PSCustomObject]@{ name = "svm_cifs_prod01" }
                        discovered_servers = @(
                            [PSCustomObject]@{
                                server_ip   = "10.30.1.15"
                                server_type = "dc"
                                preference  = "regular"
                                state       = "ok"
                            }
                        )
                    }
                )
            }
            Mock Invoke-NetAppRestRequest { return $mockRecord }
            $res = Get-NetAppActiveDc -ClusterEndpoint "https://fake-cluster" -SvmName "svm_cifs_prod01" -UseLive $true
            $res.ActiveDC | Should -Be "10.30.1.15"
        }
    }

    Context "Active DC Discovery: Preference Sorting & State Filtering" {
        It "selects 'preferred' over 'favored' and 'regular' among OK servers" {
            $mockRecord = [PSCustomObject]@{
                records = @(
                    [PSCustomObject]@{
                        svm = [PSCustomObject]@{ name = "svm_cifs_prod01" }
                        discovered_servers = @(
                            [PSCustomObject]@{ server_name = "dc-regular.corp.local"; state = "ok"; server_type = "dc"; preference = "regular" },
                            [PSCustomObject]@{ server_name = "dc-preferred.corp.local"; state = "ok"; server_type = "dc"; preference = "preferred" },
                            [PSCustomObject]@{ server_name = "dc-favored.corp.local"; state = "ok"; server_type = "dc"; preference = "favored" }
                        )
                    }
                )
            }
            Mock Invoke-NetAppRestRequest { return $mockRecord }
            $res = Get-NetAppActiveDc -ClusterEndpoint "https://fake-cluster" -SvmName "svm_cifs_prod01" -UseLive $true
            $res.ActiveDC | Should -Be "dc-preferred.corp.local"
            $res.Preference | Should -Be "preferred"
        }

        It "discards down servers even if their preference is preferred" {
            $mockRecord = [PSCustomObject]@{
                records = @(
                    [PSCustomObject]@{
                        svm = [PSCustomObject]@{ name = "svm_cifs_prod01" }
                        discovered_servers = @(
                            [PSCustomObject]@{ server_name = "dc-down.corp.local"; state = "down"; server_type = "dc"; preference = "preferred" },
                            [PSCustomObject]@{ server_name = "dc-active.corp.local"; state = "ok"; server_type = "dc"; preference = "favored" }
                        )
                    }
                )
            }
            Mock Invoke-NetAppRestRequest { return $mockRecord }
            $res = Get-NetAppActiveDc -ClusterEndpoint "https://fake-cluster" -SvmName "svm_cifs_prod01" -UseLive $true
            $res.ActiveDC | Should -Be "dc-active.corp.local"
            $res.Preference | Should -Be "favored"
        }

        It "returns demo active DC dc04.corp.local when UseLive is false" {
            $cfg = @{ NetApp = @{ UseLive = $false } }
            $activeDc = Get-NetAppActiveDc -Config $cfg
            $activeDc.ActiveDC | Should -Be "dc04.corp.local"
            $activeDc.Node | Should -Be "ontap-node-02"
            $activeDc.Status | Should -Match "OK"
            $activeDc.IsLive | Should -BeFalse
            $activeDc.AllOkDcs | Should -Contain "dc04.corp.local"
            $activeDc.AllOkDcs | Should -Contain "dc01.corp.local"
        }

        It "falls back to demo DC when live REST endpoints fail" {
            Mock Invoke-NetAppRestRequest { throw "Network unreachable" }
            $res = Get-NetAppActiveDc -ClusterEndpoint "https://bad-cluster" -UseLive $true
            $res.ActiveDC | Should -Be "dc04.corp.local"
            $res.IsLive | Should -BeFalse
            $res.FallbackReason | Should -Match "Network unreachable"
        }
    }

    Context "CIFS Share ACL Binding with Smart Retry Corridor" {
        It "successfully applies share ACL in demo mode" {
            $cfg = @{ NetApp = @{ UseLive = $false } }
            $res = Set-NetAppShareAcl -ShareName "Finance_Share" -UserOrGroup "Finance_Share" -Permission "change" -ActionType "grant" -Config $cfg
            $res.Success | Should -BeTrue
            $res.Message | Should -Match "Finance_Share"
            $res.Message | Should -Match "데모 모드"
        }

        It "formats retry count correctly without Unicode variable expansion failure" {
            # Regression test for Korean interpolation bug where $MaxRetries회 evaluated to empty
            $attempt = 3
            $maxRetries = 3
            $lastError = "SID lookup timeout"
            $obj = [PSCustomObject]@{
                Success  = $false
                Message  = "NetApp Share ACL 반영 실패 ($($maxRetries)회 재시도 초과): $lastError"
                Attempts = $attempt
            }
            $obj.Message | Should -Match "\(3회 재시도 초과\)"
            $obj.Message | Should -Not -Match "\(\s*회 재시도 초과\)"
        }
    }

    Context "Live Infrastructure Path & Timeout Handling" -Tag "Live" {
        It "gracefully fails over and reports unreachable endpoint in live mode" {
            $res = Test-NetAppConnection -ClusterEndpoint "https://127.0.0.1:65531" -TimeoutSec 1
            $res.Success | Should -BeFalse
            $res.Message | Should -Match "NetApp.*연결 실패"
        }
    }
}