param(
    [string]$SshTarget = "docker-gpu",
    [string]$DockerHost = "ssh://docker-gpu",
    [switch]$PlanOnly,
    [switch]$SkipDownload,
    [switch]$SkipPreflight,
    [switch]$SkipTrain,
    [switch]$SkipConvert,
    [switch]$SkipRestart,
    [switch]$SkipSmoke,
    [switch]$DetachedDownload,
    [switch]$DetachedConvert,
    [string]$BaseModelCardId = "qwen3-coder-30b-a3b-instruct",
    [string]$BaseModelDir = "/models/base/qwen3-coder-30b-a3b-instruct",
    [string]$AdapterDir = "/models/adapters/1c/qwen3-coder-30b-a3b-1c-lora-v1",
    [string]$AdapterGgufPath = "/models/adapters/1c/qwen3-coder-30b-a3b-1c-lora-v1.gguf",
    [string]$InferenceBaseUrl = "http://docker-gpu.cin.su:8081",
    [string]$InferenceModel = "qwen3-coder-1c-q6"
)

$ErrorActionPreference = "Stop"

function Invoke-Step {
    param(
        [Parameter(Mandatory = $true)]
        [string]$Name,
        [Parameter(Mandatory = $true)]
        [string[]]$Command
    )

    Write-Host ""
    Write-Host "== $Name"
    Write-Host ($Command -join " ")
    if ($PlanOnly) {
        return
    }
    & $Command[0] @($Command | Select-Object -Skip 1)
    if ($LASTEXITCODE -ne 0) {
        throw "Step failed with exit code ${LASTEXITCODE}: ${Name}"
    }
}

$steps = @()

$steps += @{
    Name = "GPU host preflight"
    Command = @(
        "powershell", "-NoProfile", "-ExecutionPolicy", "Bypass",
        "-File", "scripts/check_gpu_host.ps1",
        "-SshTarget", $SshTarget
    )
}

if (-not $SkipDownload) {
    $downloadCommand = @(
        "powershell", "-NoProfile", "-ExecutionPolicy", "Bypass",
        "-File", "scripts/download_hf_range_gpu.ps1",
        "-CardId", $BaseModelCardId,
        "-LocalDir", $BaseModelDir,
        "-ContainerName", "llm-hf-range-qwen3-coder-base"
    )
    if ($DetachedDownload) {
        $downloadCommand += "-Detached"
    }
    $steps += @{
        Name = "Download base HF model"
        Command = $downloadCommand
    }
}

if (-not $SkipPreflight) {
    $steps += @{
        Name = "Training preflight"
        Command = @(
            "powershell", "-NoProfile", "-ExecutionPolicy", "Bypass",
            "-File", "scripts/run_1c_lora_training_gpu.ps1",
            "-PreflightOnly"
        )
    }
}

if (-not $SkipTrain) {
    $steps += @{
        Name = "Train LoRA adapter"
        Command = @(
            "powershell", "-NoProfile", "-ExecutionPolicy", "Bypass",
            "-File", "scripts/run_1c_lora_training_gpu.ps1"
        )
    }
}

if (-not $SkipConvert) {
    $convertCommand = @(
        "powershell", "-NoProfile", "-ExecutionPolicy", "Bypass",
        "-File", "scripts/convert_1c_lora_to_gguf_gpu.ps1",
        "-AdapterDir", $AdapterDir,
        "-BaseModelDir", $BaseModelDir,
        "-OutputFile", $AdapterGgufPath
    )
    if ($DetachedConvert) {
        $convertCommand += "-Detached"
    }
    $steps += @{
        Name = "Convert adapter to GGUF"
        Command = $convertCommand
    }
}

if (-not $SkipRestart) {
    $steps += @{
        Name = "Stop Q6 service"
        Command = @(
            "powershell", "-NoProfile", "-ExecutionPolicy", "Bypass",
            "-File", "scripts/manage_gpu_q6_service.ps1",
            "-Action", "stop"
        )
    }
    $steps += @{
        Name = "Start Q6 service with LoRA"
        Command = @(
            "powershell", "-NoProfile", "-ExecutionPolicy", "Bypass",
            "-File", "scripts/manage_gpu_q6_service.ps1",
            "-Action", "start",
            "-LoraPath", $AdapterGgufPath
        )
    }
    $steps += @{
        Name = "Check Q6 service status"
        Command = @(
            "powershell", "-NoProfile", "-ExecutionPolicy", "Bypass",
            "-File", "scripts/manage_gpu_q6_service.ps1",
            "-Action", "status",
            "-LoraPath", $AdapterGgufPath
        )
    }
}

if (-not $SkipSmoke) {
    $steps += @{
        Name = "Check inference endpoint"
        Command = @(
            "python", "scripts/check_inference_endpoint.py",
            "--base-url", $InferenceBaseUrl,
            "--expected-model", $InferenceModel,
            "--print"
        )
    }
    $steps += @{
        Name = "Run 1C smoke eval"
        Command = @(
            "python", "scripts/run_1c_smoke_eval.py",
            "--base-url", $InferenceBaseUrl,
            "--model", $InferenceModel
        )
    }
}

foreach ($step in $steps) {
    if ($SkipPreflight -and $step.Name -eq "GPU host preflight") {
        continue
    }
    Invoke-Step -Name $step.Name -Command $step.Command
}

if ($PlanOnly) {
    Write-Host ""
    Write-Host "Plan complete. Re-run without -PlanOnly to execute."
} else {
    Write-Host ""
    Write-Host "Q6 LoRA training/publish flow completed."
}