package bonfire

import (
	"bytes"
	"context"
	"errors"
	"strings"
	"testing"
)

func TestCall(t *testing.T) {
	var gotArgs []string
	var gotFlag string
	cmds := []Command{{
		Name:  "acme:echo",
		Flags: []Flag{{Name: "loud", Bare: true}},
		Args:  []Arg{{Name: "word"}},
		Run: func(ctx context.Context, in Input, out Output) error {
			gotArgs = in.Args()
			gotFlag, _ = in.Flag("loud")
			out.Printf("echo %s\n", strings.Join(in.Args(), " "))
			return nil
		},
	}}

	var out bytes.Buffer
	if err := Call(t.Context(), cmds, "acme:echo", []string{"--loud", "hello", "world"}, &out); err != nil {
		t.Fatal(err)
	}
	if strings.Join(gotArgs, ",") != "hello,world" || gotFlag != "true" {
		t.Fatalf("args = %v, loud = %q", gotArgs, gotFlag)
	}
	if out.String() != "echo hello world\n" {
		t.Fatalf("out = %q", out.String())
	}

	err := Call(t.Context(), cmds, "acme:missing", nil, &out)
	if !errors.Is(err, ErrUnknownCommand) || !strings.Contains(err.Error(), `"acme:missing"`) {
		t.Fatalf("err = %v, want ErrUnknownCommand naming the command", err)
	}

	cat := NewCatalog(cmds)
	cmds[0].Name = "acme:renamed"
	if !cat.Has("acme:echo") || cat.Has("acme:renamed") {
		t.Fatal("catalog does not hold a copy of the commands")
	}
	out.Reset()
	if err := cat.Call(t.Context(), "acme:echo", []string{"x"}, &out); err != nil || out.String() != "echo x\n" {
		t.Fatalf("catalog call: out %q, err %v", out.String(), err)
	}
	var nilCat *Catalog
	if nilCat.Has("acme:echo") || !errors.Is(nilCat.Call(t.Context(), "acme:echo", nil, &out), ErrUnknownCommand) {
		t.Fatal("nil catalog must hold no commands")
	}
}