package config

import (
	"strings"
	"time"
)

// WorkstationConfig — the big model on the owner's desktop (workpc, a
// 7900 GRE with 16GB), fronted by mavgpud.
//
// homesrv cannot grow a GPU, so the resident Qwen3-1.7B is the floor and this
// is the preferred model above it (owner's call, 2026-08-02, docs/offload.md).
// The workstation is never assumed up: its card is often held by a CPT run and
// the machine sleeps. No block, or an empty URL, and homesrv behaves exactly as
// it does today.
//
// Only the prompt crosses the LAN, and the workstation is not "the box". The
// rules in CLAUDE.md about what may leave still apply.
type WorkstationConfig struct {
	// URL — where mavgpud listens, e.g. "http://192.168.1.105:8080". Empty ⇒
	// the whole block is normalised to nil and nothing probes anything.
	URL string `json:"url,omitempty"`

	// Health — the admission endpoint. Empty ⇒ URL + "/health", which is what
	// mavgpud serves. It answers 503 while the card is held, and that is the
	// signal, so it must be the supervisor's endpoint and not llama-server's.
	Health string `json:"health,omitempty"`

	// Probe — how often admission is re-checked. 0 ⇒ DefaultWorkstationProbe.
	// Nothing on the hot path waits for it: the answer is cached and read
	// atomically, so this only sets how late Maven notices the card came back.
	Probe Duration `json:"probe,omitempty"`

	// Timeout — the per-request budget for a completion on the workstation.
	// 0 ⇒ DefaultWorkstationTimeout. A big model on a LAN host is slower than
	// the resident one, and a request that overruns falls back to the floor.
	Timeout Duration `json:"timeout,omitempty"`
}

// Workstation defaults, applied in normaliseWorkstation.
const (
	DefaultWorkstationProbe   = 15 * time.Second
	DefaultWorkstationTimeout = 90 * time.Second
)

// normaliseWorkstation applies the block's defaults. No address, no preferred
// model: an unconfigured workstation is the default deploy and must be
// indistinguishable from today.
func (c *Config) normaliseWorkstation() {
	if c.Workstation != nil && strings.TrimSpace(c.Workstation.URL) == "" {
		c.Workstation = nil
	}
	if c.Workstation == nil {
		return
	}
	w := c.Workstation
	if strings.TrimSpace(w.Health) == "" {
		w.Health = strings.TrimRight(w.URL, "/") + "/health"
	}
	if w.Probe <= 0 {
		w.Probe = Duration(DefaultWorkstationProbe)
	}
	if w.Timeout <= 0 {
		w.Timeout = Duration(DefaultWorkstationTimeout)
	}
}