package opencode

import (
	"os"
	"path/filepath"
	"testing"
)

func TestReadModelRef_String(t *testing.T) {
	dir := t.TempDir()
	path := filepath.Join(dir, "opencode.jsonc")
	// конфиг с комментариями и trailing-запятыми (JSONC).
	src := `{
		// комментарий
		"model": "tokentool/deepseek/deepseek-v4-flash-0731", /* и блочный */
		"provider": {
			"tokentool": {"api": {"type": "aisdk", "package": "@ai-sdk/openai-compatible", "url": "https://x"}},
		},
	}`
	if err := os.WriteFile(path, []byte(src), 0o644); err != nil {
		t.Fatalf("write: %v", err)
	}
	m, err := ReadModelRef(path, "")
	if err != nil {
		t.Fatalf("ReadModelRef err: %v", err)
	}
	if m == nil || m.ProviderID != "tokentool" || m.ID != "deepseek/deepseek-v4-flash-0731" {
		t.Errorf("model = %+v, want tokentool/deepseek-v4-flash-0731", m)
	}
}

func TestReadModelRef_Object(t *testing.T) {
	dir := t.TempDir()
	path := filepath.Join(dir, "opencode.json")
	src := `{"model": {"providerID": "tokentool", "id": "deepseek/deepseek-v4-flash-0731"}}`
	if err := os.WriteFile(path, []byte(src), 0o644); err != nil {
		t.Fatalf("write: %v", err)
	}
	m, err := ReadModelRef(path, "")
	if err != nil {
		t.Fatalf("ReadModelRef err: %v", err)
	}
	if m == nil || m.ID != "deepseek/deepseek-v4-flash-0731" {
		t.Errorf("model = %+v, want object-форма", m)
	}
}

func TestReadModelRef_Missing(t *testing.T) {
	dir := t.TempDir()
	path := filepath.Join(dir, "opencode.json")
	src := `{"provider": {}}`
	if err := os.WriteFile(path, []byte(src), 0o644); err != nil {
		t.Fatalf("write: %v", err)
	}
	m, err := ReadModelRef(path, "")
	if err != nil {
		t.Fatalf("ReadModelRef err: %v", err)
	}
	if m != nil {
		t.Errorf("model = %+v, want nil (model не задан)", m)
	}
}

func TestReadModelRef_NoFile(t *testing.T) {
	dir := t.TempDir()
	m, err := ReadModelRef(filepath.Join(dir, "nope.json"), dir)
	if err != nil {
		t.Fatalf("ReadModelRef err: %v", err)
	}
	if m != nil {
		t.Errorf("model = %+v, want nil", m)
	}
}

func TestReadModelRef_Bad(t *testing.T) {
	dir := t.TempDir()
	path := filepath.Join(dir, "opencode.json")
	src := `{"model": 12345}`
	if err := os.WriteFile(path, []byte(src), 0o644); err != nil {
		t.Fatalf("write: %v", err)
	}
	if _, err := ReadModelRef(path, ""); err == nil {
		t.Error("ReadModelRef должен упасть на некорректной model")
	}
}