package api

import (
	"errors"
	"fmt"
	"testing"

	"gitea.stevedudenhoeffer.com/steve/pansy/internal/domain"
)

// TestInputMessage: the bare sentinel stays generic; a wrapped reason reaches
// the person without the "invalid input: " prefix in front of it.
func TestInputMessage(t *testing.T) {
	cases := []struct {
		err  error
		want string
	}{
		{domain.ErrInvalidInput, "invalid input"},
		{fmt.Errorf("%w: chat model %q: unknown provider", domain.ErrInvalidInput, "nonesuch/model"), `chat model "nonesuch/model": unknown provider`},
		{fmt.Errorf("loading: %w", domain.ErrInvalidInput), "loading: invalid input"},
	}
	for _, c := range cases {
		if !errors.Is(c.err, domain.ErrInvalidInput) {
			t.Fatalf("%v should still be an ErrInvalidInput", c.err)
		}
		if got := inputMessage(c.err); got != c.want {
			t.Errorf("inputMessage(%v) = %q, want %q", c.err, got, c.want)
		}
	}
}