# ============================================================================
# ROA UNINSTALL SCRIPT
# ============================================================================
# Removes all ROA application objects from Oracle database
#
# Usage:
#   .\99-uninstall-roa.ps1 -SystemPassword "yourpassword"
#   .\99-uninstall-roa.ps1 -SystemPassword "yourpassword" -Force
#
# Parameters:
#   -SystemPassword : SYS password for database connection
#   -Force          : Skip confirmation prompt
#
# ============================================================================

param(
    [Parameter(Mandatory=$false)]
    [string]$SystemPassword,

    [Parameter(Mandatory=$false)]
    [switch]$Force
)

$ErrorActionPreference = "Stop"

# ============================================================================
# LOAD CONFIGURATION AND LIBRARIES
# ============================================================================

$ScriptDir = Split-Path -Parent $MyInvocation.MyCommand.Path
$RootDir = Split-Path -Parent $ScriptDir

# Load config
$ConfigFile = Join-Path $RootDir "config.ps1"
if (Test-Path $ConfigFile) {
    . $ConfigFile
} else {
    Write-Host "ERROR: config.ps1 not found. Copy config.example.ps1 to config.ps1" -ForegroundColor Red
    exit 1
}

# Load libraries
. (Join-Path $ScriptDir "lib\logging-functions.ps1")
. (Join-Path $ScriptDir "lib\oracle-functions.ps1")

# ============================================================================
# MAIN
# ============================================================================

Write-Host ""
Write-Host "============================================================" -ForegroundColor Cyan
Write-Host "       ROA UNINSTALL - REMOVING ALL ROA OBJECTS" -ForegroundColor Cyan
Write-Host "============================================================" -ForegroundColor Cyan
Write-Host ""

# Get password if not provided
if (-not $SystemPassword) {
    $SecurePassword = Read-Host "Enter SYS password" -AsSecureString
    $SystemPassword = [Runtime.InteropServices.Marshal]::PtrToStringAuto(
        [Runtime.InteropServices.Marshal]::SecureStringToBSTR($SecurePassword)
    )
}

# Build connection string
$OracleService = if ($Config.OracleService) { $Config.OracleService } else { "XEPDB1" }
$OracleHost = if ($Config.OracleHost) { $Config.OracleHost } else { "localhost" }
$OraclePort = if ($Config.OraclePort) { $Config.OraclePort } else { 1521 }
$ConnString = "${OracleHost}:${OraclePort}/${OracleService}"

Write-Host "Target database: $ConnString" -ForegroundColor Yellow
Write-Host ""

# Confirmation
if (-not $Force) {
    Write-Host "WARNING: This will PERMANENTLY DELETE all ROA data!" -ForegroundColor Red
    Write-Host ""
    Write-Host "Objects to be removed:" -ForegroundColor Yellow
    Write-Host "  - All company user schemas (using ROA tablespace)"
    Write-Host "  - CONTAFIN_ORACLE user and all objects"
    Write-Host "  - Public synonyms pointing to CONTAFIN_ORACLE"
    Write-Host "  - SYS custom objects (AUTH_PACK, AUTH_SERII, etc.)"
    Write-Host "  - Application context SESIUNE"
    Write-Host "  - Tablespace ROA (including datafile)"
    Write-Host ""

    $confirm = Read-Host "Type 'YES' to confirm uninstall"
    if ($confirm -ne "YES") {
        Write-Host "Uninstall cancelled." -ForegroundColor Yellow
        exit 0
    }
}

Write-Host ""
Write-Host "Starting uninstall..." -ForegroundColor Cyan
Write-Host ""

# Find sqlplus
$SqlPlus = Get-SqlPlusPath
if (-not $SqlPlus) {
    Write-Host "ERROR: sqlplus.exe not found" -ForegroundColor Red
    exit 1
}

# Run uninstall script
$SqlScript = Join-Path $RootDir "sql\uninstall-roa.sql"

if (-not (Test-Path $SqlScript)) {
    Write-Host "ERROR: uninstall-roa.sql not found at $SqlScript" -ForegroundColor Red
    exit 1
}

Write-Host "Running uninstall script..." -ForegroundColor Cyan

$SqlInput = @"
@"$SqlScript"
EXIT
"@

$process = Start-Process -FilePath $SqlPlus `
    -ArgumentList "sys/${SystemPassword}@${ConnString} as sysdba" `
    -NoNewWindow -Wait -PassThru `
    -RedirectStandardInput (New-TemporaryFile | ForEach-Object {
        $SqlInput | Set-Content $_.FullName
        $_.FullName
    })

# Alternative: run directly
& $SqlPlus "sys/${SystemPassword}@${ConnString} as sysdba" "@$SqlScript"

Write-Host ""
Write-Host "============================================================" -ForegroundColor Green
Write-Host "       ROA UNINSTALL COMPLETE" -ForegroundColor Green
Write-Host "============================================================" -ForegroundColor Green
Write-Host ""
Write-Host "Database is now clean. You can re-run the setup scripts." -ForegroundColor Cyan
Write-Host ""