package config

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

func TestLoad(t *testing.T) {
	// Create a temporary test config file
	content := []byte(`
database:
  driver: postgres
  dsn: postgres://user:pass@localhost:5432/dbname
server:
  port: 8080
  host: localhost
jwt:
  secret: test-secret
  expiration: 24h
storage:
  type: local
  local:
    root_dir: /tmp/storage
  upload:
    max_size: 10485760
logging:
  level: info
  format: json
`)

	tmpDir := t.TempDir()
	configPath := filepath.Join(tmpDir, "config.yaml")
	if err := os.WriteFile(configPath, content, 0644); err != nil {
		t.Fatalf("Failed to write test config: %v", err)
	}

	// Test loading config
	cfg, err := Load(configPath)
	if err != nil {
		t.Fatalf("Load() error = %v", err)
	}

	// Verify loaded values
	tests := []struct {
		name     string
		got      interface{}
		want     interface{}
		errorMsg string
	}{
		{"Database Driver", cfg.Database.Driver, "postgres", "incorrect database driver"},
		{"Server Port", cfg.Server.Port, 8080, "incorrect server port"},
		{"JWT Secret", cfg.JWT.Secret, "test-secret", "incorrect JWT secret"},
		{"Storage Type", cfg.Storage.Type, "local", "incorrect storage type"},
		{"Logging Level", cfg.Logging.Level, "info", "incorrect logging level"},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			if tt.got != tt.want {
				t.Errorf("%s = %v, want %v", tt.name, tt.got, tt.want)
			}
		})
	}
}

func TestLoadError(t *testing.T) {
	// Test loading non-existent file
	_, err := Load("non-existent-file.yaml")
	if err == nil {
		t.Error("Load() error = nil, want error for non-existent file")
	}

	// Test loading invalid YAML
	tmpDir := t.TempDir()
	invalidPath := filepath.Join(tmpDir, "invalid.yaml")
	if err := os.WriteFile(invalidPath, []byte("invalid: }{yaml"), 0644); err != nil {
		t.Fatalf("Failed to write invalid config: %v", err)
	}

	_, err = Load(invalidPath)
	if err == nil {
		t.Error("Load() error = nil, want error for invalid YAML")
	}
}