package config

import (
	"os"
	"testing"
	"time"
)

func TestLoadValidConfig(t *testing.T) {
	content := `
yandex:
  token: "test-token"
artists:
  - id: 12345
storage:
  path: "/data/music"
  organize: true
monitor:
  interval: "24h"
`
	tmpfile, err := os.CreateTemp("", "config-*.yaml")
	if err != nil {
		t.Fatal(err)
	}
	defer os.Remove(tmpfile.Name())

	if _, err := tmpfile.WriteString(content); err != nil {
		t.Fatal(err)
	}
	tmpfile.Close()

	cfg, err := Load(tmpfile.Name())
	if err != nil {
		t.Fatalf("Load failed: %v", err)
	}

	if cfg.Yandex.Token != "test-token" {
		t.Errorf("expected token 'test-token', got '%s'", cfg.Yandex.Token)
	}
	if len(cfg.Artists) != 1 || cfg.Artists[0].ID != 12345 {
		t.Errorf("expected artist ID 12345, got %v", cfg.Artists)
	}
	if cfg.Storage.Path != "/data/music" {
		t.Errorf("expected path '/data/music', got '%s'", cfg.Storage.Path)
	}
	if !cfg.Storage.Organize {
		t.Error("expected organize=true")
	}
	interval, err := cfg.GetMonitorInterval()
	if err != nil {
		t.Fatalf("GetMonitorInterval failed: %v", err)
	}
	if interval != 24*time.Hour {
		t.Errorf("expected 24h, got %v", interval)
	}
}

func TestLoadConfigWithUsernamePassword(t *testing.T) {
	content := `
yandex:
  username: "user"
  password: "pass"
artists:
  - id: 1
storage:
  path: "/data"
monitor:
  interval: "1h"
`
	tmpfile, err := os.CreateTemp("", "config-*.yaml")
	if err != nil {
		t.Fatal(err)
	}
	defer os.Remove(tmpfile.Name())

	if _, err := tmpfile.WriteString(content); err != nil {
		t.Fatal(err)
	}
	tmpfile.Close()

	cfg, err := Load(tmpfile.Name())
	if err != nil {
		t.Fatalf("Load failed: %v", err)
	}

	if cfg.Yandex.Username != "user" || cfg.Yandex.Password != "pass" {
		t.Errorf("expected username/password, got %v", cfg.Yandex)
	}
}

func TestLoadConfigMissingAuth(t *testing.T) {
	content := `
yandex: {}
artists:
  - id: 1
storage:
  path: "/data"
monitor:
  interval: "1h"
`
	tmpfile, err := os.CreateTemp("", "config-*.yaml")
	if err != nil {
		t.Fatal(err)
	}
	defer os.Remove(tmpfile.Name())

	if _, err := tmpfile.WriteString(content); err != nil {
		t.Fatal(err)
	}
	tmpfile.Close()

	_, err = Load(tmpfile.Name())
	if err == nil {
		t.Error("expected error for missing auth")
	}
}

func TestLoadConfigNoArtists(t *testing.T) {
	content := `
yandex:
  token: "test"
artists: []
storage:
  path: "/data"
monitor:
  interval: "1h"
`
	tmpfile, err := os.CreateTemp("", "config-*.yaml")
	if err != nil {
		t.Fatal(err)
	}
	defer os.Remove(tmpfile.Name())

	if _, err := tmpfile.WriteString(content); err != nil {
		t.Fatal(err)
	}
	tmpfile.Close()

	_, err = Load(tmpfile.Name())
	if err == nil {
		t.Error("expected error for no artists")
	}
}

func TestLoadConfigInvalidInterval(t *testing.T) {
	content := `
yandex:
  token: "test"
artists:
  - id: 1
storage:
  path: "/data"
monitor:
  interval: "invalid"
`
	tmpfile, err := os.CreateTemp("", "config-*.yaml")
	if err != nil {
		t.Fatal(err)
	}
	defer os.Remove(tmpfile.Name())

	if _, err := tmpfile.WriteString(content); err != nil {
		t.Fatal(err)
	}
	tmpfile.Close()

	_, err = Load(tmpfile.Name())
	if err == nil {
		t.Error("expected error for invalid interval")
	}
}

func TestLoadConfigNegativeArtistID(t *testing.T) {
	content := `
yandex:
  token: "test"
artists:
  - id: -1
storage:
  path: "/data"
monitor:
  interval: "1h"
`
	tmpfile, err := os.CreateTemp("", "config-*.yaml")
	if err != nil {
		t.Fatal(err)
	}
	defer os.Remove(tmpfile.Name())

	if _, err := tmpfile.WriteString(content); err != nil {
		t.Fatal(err)
	}
	tmpfile.Close()

	_, err = Load(tmpfile.Name())
	if err == nil {
		t.Error("expected error for negative artist ID")
	}
}