// Command minimal is executus's "hello, agentic world": wire a model resolver,
// a tool registry, and the run executor, then run an agent. With no batteries
// (Audit/Budget/Critic/Checkpointer/Palette/Delivery all nil) this is a
// bounded, in-memory run — the light-host shape (gadfly's case).
//
// Run it with a provider key for the configured tier, e.g.
//
//	ANTHROPIC_API_KEY=sk-... go run ./examples/minimal
//
// Override a tier from the environment without touching code, e.g.
//
//	EXECUTUS_MODEL_TIER_FAST=openai/gpt-4o-mini ANTHROPIC_API_KEY= OPENAI_KEY=sk-... go run ./examples/minimal
package main

import (
	"context"
	"fmt"
	"log"

	"gitea.stevedudenhoeffer.com/steve/executus/config"
	"gitea.stevedudenhoeffer.com/steve/executus/model"
	"gitea.stevedudenhoeffer.com/steve/executus/run"
	"gitea.stevedudenhoeffer.com/steve/executus/tool"
)

func main() {
	// 1. Configure model tiers: live values come from the environment
	//    (EXECUTUS_MODEL_TIER_<NAME>), falling back to these defaults.
	model.Configure(config.Env("EXECUTUS_"), map[string]string{
		"fast":     "anthropic/claude-haiku-4-5",
		"thinking": "anthropic/claude-opus-4-8",
	}, 0)

	// 2. Build the executor: a tool registry + the model resolver. No batteries.
	ex := run.New(run.Config{
		Registry: tool.NewRegistry(),
		Models:   model.ParseModelForContext,
	})

	// 3. Run an agent and print its answer.
	res := ex.Run(context.Background(),
		run.RunnableAgent{Name: "assistant", SystemPrompt: "You are concise.", ModelTier: "fast"},
		tool.Invocation{RunID: "demo-1", CallerID: "local"},
		"In one sentence, what is an agent harness?")
	if res.Err != nil {
		log.Fatalf("run failed: %v", res.Err)
	}
	fmt.Println(res.Output)
}