package config

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

func writeConfig(t *testing.T, body string) {
	t.Helper()
	dir := t.TempDir()
	t.Setenv("XDG_CONFIG_HOME", dir)
	if err := os.MkdirAll(filepath.Join(dir, "terdut-tui"), 0o755); err != nil {
		t.Fatal(err)
	}
	if err := os.WriteFile(filepath.Join(dir, "terdut-tui", "config.yaml"), []byte(body), 0o600); err != nil {
		t.Fatal(err)
	}
}

func TestLoad_TeamIsOptional(t *testing.T) {
	writeConfig(t, "server_url: https://terdut.example.com\n")
	cfg, err := Load()
	if err != nil {
		t.Fatalf("load: %v", err)
	}
	if cfg.Team != "" {
		t.Errorf("expected no default team, got %q", cfg.Team)
	}

	writeConfig(t, "server_url: https://terdut.example.com\nteam: Ops\n")
	cfg, err = Load()
	if err != nil {
		t.Fatalf("load: %v", err)
	}
	if cfg.Team != "Ops" {
		t.Errorf("expected team Ops, got %q", cfg.Team)
	}
}

// Signing in replaced the API key, so a config that has only a server URL is
// complete, and one that still carries an api_key is noted rather than refused.
func TestLoad_NoAPIKeyNeeded(t *testing.T) {
	writeConfig(t, "server_url: https://terdut.example.com\nusername: niklas\n")
	cfg, err := Load()
	if err != nil {
		t.Fatalf("load: %v", err)
	}
	if cfg.Username != "niklas" || cfg.LegacyAPIKey {
		t.Errorf("unexpected config %+v", cfg)
	}

	writeConfig(t, "server_url: https://terdut.example.com\napi_key: old\n")
	cfg, err = Load()
	if err != nil {
		t.Fatalf("a leftover api_key must not stop the TUI starting: %v", err)
	}
	if !cfg.LegacyAPIKey {
		t.Error("expected the leftover api_key to be noted")
	}
}

func TestLoad_AuthIsOptionalAndChecked(t *testing.T) {
	for _, tc := range []struct {
		yaml, want string
		bad        bool
	}{
		{"", "", false},
		{"auth: password\n", "password", false},
		{"auth: sso\n", "sso", false},
		{"auth: oidc\n", "", true},
	} {
		writeConfig(t, "server_url: https://terdut.example.com\n"+tc.yaml)
		cfg, err := Load()
		switch {
		case tc.bad && err == nil:
			t.Errorf("%q: expected an error", tc.yaml)
		case !tc.bad && err != nil:
			t.Errorf("%q: %v", tc.yaml, err)
		case !tc.bad && cfg.Auth != tc.want:
			t.Errorf("%q: auth %q, want %q", tc.yaml, cfg.Auth, tc.want)
		}
	}
}