[CmdletBinding()]
param(
    # The account the task runs as. Defaults to the current user, but MUST be passed
    # explicitly when launching this script elevated — if UAC is satisfied with a
    # different admin account, $env:USERNAME inside the elevated process is that
    # admin, not the intended owner, and the task would be registered for the wrong
    # user (whose credential vault lacks the git remote's stored credential).
    [string] $UserId = "$env:USERDOMAIN\$env:USERNAME",

    # Optional path to write a transcript of the result to, so a caller that cannot
    # see the elevated console can read the outcome.
    [string] $LogPath
)

$ErrorActionPreference = 'Stop'
$repositoryRoot = $PSScriptRoot
$syncScript = Join-Path $repositoryRoot 'sync-skills.ps1'

if (-not (Test-Path -LiteralPath $syncScript)) {
    throw "Sync script not found at '$syncScript'."
}

$action = New-ScheduledTaskAction `
    -Execute 'powershell.exe' `
    -Argument "-NoProfile -NonInteractive -ExecutionPolicy Bypass -File `"$syncScript`""
$trigger = New-ScheduledTaskTrigger -Weekly -DaysOfWeek Sunday -At 10:00AM

# Must run as the interactive user, NOT SYSTEM. The git remote is HTTPS and
# authenticates via credential.helper=manager, whose vault is per-user — SYSTEM
# cannot read it, so `git fetch origin main` fails and the whole sync aborts.
# Interactive logon keeps access to that vault; StartWhenAvailable catches up a
# missed run at the next logon.
$currentUser = $UserId
$principal = New-ScheduledTaskPrincipal -UserId $currentUser -LogonType Interactive -RunLevel Limited
$settings = New-ScheduledTaskSettingsSet `
    -StartWhenAvailable `
    -RunOnlyIfNetworkAvailable `
    -MultipleInstances IgnoreNew `
    -ExecutionTimeLimit (New-TimeSpan -Hours 1)

Register-ScheduledTask `
    -TaskName 'PromptWorks Weekly Skill Sync' `
    -Action $action `
    -Trigger $trigger `
    -Principal $principal `
    -Settings $settings `
    -Description 'Mirrors custom Microsoft Scout skills to PromptWorks.' `
    -Force | Out-Null

$msg = "Registered 'PromptWorks Weekly Skill Sync' to run as $currentUser, Sundays at 10:00 AM."
Write-Host $msg
if ($LogPath) {
    $info = Get-ScheduledTask -TaskName 'PromptWorks Weekly Skill Sync' | Get-ScheduledTaskInfo
    $task = Get-ScheduledTask -TaskName 'PromptWorks Weekly Skill Sync'
    @(
        "OK: $msg",
        "RunAs    : $($task.Principal.UserId)",
        "LogonType: $($task.Principal.LogonType)",
        "State    : $($task.State)",
        "NextRun  : $($info.NextRunTime)"
    ) | Set-Content -LiteralPath $LogPath -Encoding UTF8
}