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package main

import (
	"context"
	"slices"
	"testing"

	"mm/internal/config"
	"mm/internal/detector"
	"mm/internal/engine"

	"github.com/firebase/genkit/go/genkit"
)

// assembledNames runs assembleTools on a fresh Genkit with only the built-in
// tools in play (no MCP gateway, no skills, no lsp).
func assembledNames(t *testing.T) []string {
	t.Helper()
	t.Setenv("MCP_GATEWAY_URL", "")
	e := &engine.Engine{G: genkit.Init(context.Background())}
	set := assembleTools(e, detector.NewLoopDetector(10, 3), nil)
	return set.names
}

func withConfig(t *testing.T, change func(*config.Config)) {
	t.Helper()
	saved := config.Cfg
	t.Cleanup(func() { config.Cfg = saved })
	config.Cfg.SkillsDir = t.TempDir()
	config.Cfg.MMConfigs = nil
	config.Cfg.LSP.Servers = nil
	config.Cfg.MCP.Enabled = false
	change(&config.Cfg)
}

// ask_user is declared by default, not when askUserTool is off, and never
// beside a structuredOutput (which would refuse to start with a tool).
func TestAskUserIsDeclaredUnlessTurnedOffOrStructured(t *testing.T) {
	cases := []struct {
		name   string
		change func(*config.Config)
		want   bool
	}{
		{"default", func(*config.Config) {}, true},
		{"askUserTool: false", func(c *config.Config) { c.AskUserTool = false }, false},
		{"structuredOutput", func(c *config.Config) { c.OutputSchema = map[string]any{"type": "object"} }, false},
	}
	for _, c := range cases {
		t.Run(c.name, func(t *testing.T) {
			withConfig(t, c.change)
			if got := slices.Contains(assembledNames(t), "ask_user"); got != c.want {
				t.Errorf("ask_user declared = %v, want %v", got, c.want)
			}
		})
	}
}