#requires -RunAsAdministrator
Set-StrictMode -Version Latest
$ErrorActionPreference = "Stop"

# =========================
# Parámetros Globales
# =========================
$RepoUrl         = "https://git.insidemicro.com/panotuco/dex.git"
$RepoLocalPath   = "C:\ProgramData\Alloy\repo_config"
$DataPath        = "C:\ProgramData\Alloy"
$ScriptsRoot     = Join-Path $DataPath "scripts"
$BookmarksPath   = Join-Path $DataPath "bookmarks"
$TmpDir          = Join-Path $env:TEMP "grafana-alloy-install"

$TaskNameSync    = "Sync Alloy Config from Git"
$TaskNameBoot    = "Send Windows Boot Event to Loki"

$SyncScriptPath  = Join-Path $ScriptsRoot "sync-alloy-git.ps1"
$BootScriptPath  = Join-Path $ScriptsRoot "send-boot-event.ps1"

$GitHubLatestApi  = "https://api.github.com/repos/grafana/alloy/releases/latest"

# =========================
# Utilidades
# =========================
function Write-Log {
    param([string]$Message, [string]$Level = "INFO")
    $line = "[{0}] [{1}] {2}" -f (Get-Date -Format "yyyy-MM-dd HH:mm:ss"), $Level, $Message
    Write-Host $line
}

function Ensure-Directory {
    param([string]$Path)
    if (-not (Test-Path -LiteralPath $Path)) {
        New-Item -ItemType Directory -Path $Path -Force | Out-Null
    }
}

# =========================
# Validaciones e Directorios
# =========================
Ensure-Directory -Path $TmpDir
Ensure-Directory -Path $ScriptsRoot
Ensure-Directory -Path $DataPath
Ensure-Directory -Path $BookmarksPath

# =========================
# 1. Instalación de Grafana Alloy
# =========================
$installerName = "alloy-installer-windows-amd64.exe"
$installerPath = Join-Path $TmpDir $installerName

Write-Log "Consultando última release de Grafana Alloy..."
$release = Invoke-RestMethod -Uri $GitHubLatestApi -Headers @{ "Accept" = "application/vnd.github+json" }
$asset = $release.assets | Where-Object { $_.name -eq $installerName } | Select-Object -First 1
$downloadUrl = $asset.browser_download_url

Write-Log "Descargando e instalando Alloy..."
Invoke-WebRequest -Uri $downloadUrl -OutFile $installerPath
$installProcess = Start-Process -FilePath $installerPath -ArgumentList "/S" -Wait -PassThru

# Detectar ruta de instalación (normalmente Program Files\GrafanaLabs\Alloy)
$InstallRoot = Join-Path $env:ProgramFiles "GrafanaLabs\Alloy"
if (-not (Test-Path $InstallRoot)) { $InstallRoot = Join-Path $env:ProgramFiles "Alloy" }
$AlloyConfigPath = Join-Path $InstallRoot "config.alloy"

# =========================
# 2. Instalación de Git y Clonación
# =========================
if (!(Get-Command git -ErrorAction SilentlyContinue)) {
    Write-Log "Instalando Git vía winget..."
    winget install --id Git.Git -e --source winget --accept-package-agreements --accept-source-agreements
    $env:Path += ";C:\Program Files\Git\cmd" 
}

if (!(Test-Path $RepoLocalPath)) {
    Write-Log "Clonando repositorio de configuración..."
    git clone $RepoUrl $RepoLocalPath
}

# =========================
# 3. Script de Sincronización (GitOps)
# =========================
$SyncScriptContent = @"
Set-Location "$RepoLocalPath"
git fetch origin
`$local = git rev-parse HEAD
`$remote = git rev-parse origin/main

if (`$local -ne `$remote) {
    git reset --hard origin/main
    Copy-Item -Path (Join-Path "$RepoLocalPath" "config.alloy") -Destination "$AlloyConfigPath" -Force
    Restart-Service -Name "Alloy" -Force
    Write-Output "Configuracion actualizada y servicio reiniciado"
}
"@
Set-Content -Path $SyncScriptPath -Value $SyncScriptContent -Encoding UTF8



# =========================
# 5. Registro de Tareas Programadas
# =========================
$principal = New-ScheduledTaskPrincipal -UserId "SYSTEM" -RunLevel Highest
$settings = New-ScheduledTaskSettingsSet -AllowStartIfOnBatteries -DontStopIfGoingOnBatteries -StartWhenAvailable

# Tarea Sync (Cada 10 min)
$actionSync = New-ScheduledTaskAction -Execute "powershell.exe" -Argument "-NoProfile -ExecutionPolicy Bypass -File `"$SyncScriptPath`""
$triggerSync = New-ScheduledTaskTrigger -Once -At (Get-Date) -RepetitionInterval (New-TimeSpan -Minutes 10)
Register-ScheduledTask -TaskName $TaskNameSync -Action $actionSync -Trigger $triggerSync -Principal $principal -Settings $settings -Force

# =========================
# 6. Arranque Inicial
# =========================
Write-Log "Sincronizando configuración inicial..."
& $SyncScriptPath
Write-Log "Proceso completado."