package config

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

func TestLoadValid(t *testing.T) {
	yaml := `
global:
  backup_dir: /tmp/backups
projects:
  - name: testapp
    path: /opt/testapp
`
	dir := t.TempDir()
	path := filepath.Join(dir, "config.yaml")
	if err := os.WriteFile(path, []byte(yaml), 0644); err != nil {
		t.Fatal(err)
	}
	cfg, err := Load(path)
	if err != nil {
		t.Fatalf("Load: %v", err)
	}
	if cfg.Global.BackupDir != "/tmp/backups" {
		t.Errorf("backup_dir = %q", cfg.Global.BackupDir)
	}
	if len(cfg.Projects) != 1 {
		t.Fatalf("expected 1 project, got %d", len(cfg.Projects))
	}
	p := cfg.Projects[0]
	if p.Name != "testapp" {
		t.Errorf("name = %q", p.Name)
	}
	if p.ComposeFile != "docker-compose.yml" {
		t.Errorf("compose_file default = %q", p.ComposeFile)
	}
	if p.Retention.Count != DefaultRetentionCount {
		t.Errorf("retention count default = %d", p.Retention.Count)
	}
	if cfg.HasRemote() {
		t.Error("HasRemote should be false")
	}
}

func TestLoadMissingBackupDir(t *testing.T) {
	yaml := `
projects:
  - name: x
    path: /x
`
	dir := t.TempDir()
	path := filepath.Join(dir, "config.yaml")
	os.WriteFile(path, []byte(yaml), 0644)
	_, err := Load(path)
	if err == nil {
		t.Fatal("expected error for missing backup_dir")
	}
}

func TestLoadNoProjects(t *testing.T) {
	yaml := `
global:
  backup_dir: /tmp
`
	dir := t.TempDir()
	path := filepath.Join(dir, "config.yaml")
	os.WriteFile(path, []byte(yaml), 0644)
	_, err := Load(path)
	if err == nil {
		t.Fatal("expected error for no projects")
	}
}

func TestHasCron(t *testing.T) {
	cfg := &Config{
		Projects: []ProjectConfig{
			{Name: "a", Cron: ""},
			{Name: "b", Cron: "0 3 * * *"},
		},
	}
	if !cfg.HasCron() {
		t.Error("HasCron should be true")
	}
	cfg2 := &Config{
		Projects: []ProjectConfig{
			{Name: "a", Cron: ""},
		},
	}
	if cfg2.HasCron() {
		t.Error("HasCron should be false")
	}
}

func TestValidateWebDAVRequiresURL(t *testing.T) {
	cfg := &Config{
		Global: GlobalConfig{BackupDir: "/tmp/backups"},
		Projects: []ProjectConfig{{Name: "app", Path: "/tmp/app"}},
		Remote: &RemoteConfig{WebDAV: &WebDAVConfig{}},
	}
	err := cfg.Validate()
	if err == nil || !strings.Contains(err.Error(), "remote.webdav.url is required") {
		t.Fatalf("expected webdav url error, got %v", err)
	}
}

func TestValidateS3RequiresFields(t *testing.T) {
	cfg := &Config{
		Global: GlobalConfig{BackupDir: "/tmp/backups"},
		Projects: []ProjectConfig{{Name: "app", Path: "/tmp/app"}},
		Remote: &RemoteConfig{S3: &S3Config{}},
	}
	err := cfg.Validate()
	if err == nil || !strings.Contains(err.Error(), "remote.s3.bucket is required") {
		t.Fatalf("expected s3 bucket error, got %v", err)
	}
}