package config

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

func TestLoadRootList(t *testing.T) {
	dir := t.TempDir()
	path := filepath.Join(dir, "config.yml")
	content := `
- name: weatherdb
  driver: postgres
  params:
    uri: postgres://weatherdb:5432/weatherdb?sslmode=disable
    username: weatherdb
    password: weatherdb
`
	if err := os.WriteFile(path, []byte(content), 0o600); err != nil {
		t.Fatalf("write temp config: %v", err)
	}

	cfg, err := Load(path)
	if err != nil {
		t.Fatalf("load config: %v", err)
	}
	if len(cfg.Databases) != 1 {
		t.Fatalf("expected one database, got %d", len(cfg.Databases))
	}
	if cfg.Databases[0].Name != "weatherdb" {
		t.Fatalf("unexpected db name %q", cfg.Databases[0].Name)
	}
}

func TestLoadMissingRequiredFieldFails(t *testing.T) {
	dir := t.TempDir()
	path := filepath.Join(dir, "config.yml")
	content := `
- name: weatherdb
  driver: postgres
  params:
    username: weatherdb
    password: weatherdb
`
	if err := os.WriteFile(path, []byte(content), 0o600); err != nil {
		t.Fatalf("write temp config: %v", err)
	}

	if _, err := Load(path); err == nil {
		t.Fatalf("expected validation error for missing params.uri")
	}
}