package app

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

	"gitea.maximumdirect.net/eric/narratio/internal/config"
)

func TestResolveCampaignConfigPathCampaignFileWins(t *testing.T) {
	explicit := filepath.Join(t.TempDir(), "custom-campaign.yml")
	got, err := resolveCampaignConfigPath(&config.PipelineConfig{}, "", explicit)
	if err != nil {
		t.Fatalf("resolveCampaignConfigPath() error = %v", err)
	}
	if got != explicit {
		t.Fatalf("path = %q, want explicit path %q", got, explicit)
	}
}

func TestResolveCampaignConfigPathUsesSelectedCampaignID(t *testing.T) {
	dir := t.TempDir()
	pipelineCfg := &config.PipelineConfig{}
	pipelineCfg.Campaigns.Root = dir

	got, err := resolveCampaignConfigPath(pipelineCfg, "icewind", "")
	if err != nil {
		t.Fatalf("resolveCampaignConfigPath() error = %v", err)
	}
	want := filepath.Join(dir, "icewind", "campaign.yml")
	if got != filepath.Clean(want) {
		t.Fatalf("path = %q, want %q", got, filepath.Clean(want))
	}
}

func TestResolveCampaignConfigPathUsesDefaultCampaignID(t *testing.T) {
	dir := t.TempDir()
	pipelineCfg := &config.PipelineConfig{}
	pipelineCfg.Campaigns.Root = dir
	pipelineCfg.Campaigns.DefaultCampaignID = "dilfs"

	got, err := resolveCampaignConfigPath(pipelineCfg, "", "")
	if err != nil {
		t.Fatalf("resolveCampaignConfigPath() error = %v", err)
	}
	want := filepath.Join(dir, "dilfs", "campaign.yml")
	if got != filepath.Clean(want) {
		t.Fatalf("path = %q, want %q", got, filepath.Clean(want))
	}
}

func TestResolveCampaignConfigPathRejectsCampaignIDAndFile(t *testing.T) {
	_, err := resolveCampaignConfigPath(&config.PipelineConfig{}, "dilfs", filepath.Join(t.TempDir(), "campaign.yml"))
	if err == nil {
		t.Fatal("expected error, got nil")
	}
	if !strings.Contains(err.Error(), "mutually exclusive") {
		t.Fatalf("error = %q, want mutual exclusion", err.Error())
	}
}

func TestResolveCampaignConfigPathRequiresCampaignSelection(t *testing.T) {
	_, err := resolveCampaignConfigPath(&config.PipelineConfig{}, "", "")
	if err == nil {
		t.Fatal("expected error, got nil")
	}
	if !strings.Contains(err.Error(), "no campaign selected") {
		t.Fatalf("error = %q, want missing selection guidance", err.Error())
	}
}

func TestResolveCampaignConfigPathRejectsPathLikeCampaignID(t *testing.T) {
	pipelineCfg := &config.PipelineConfig{}
	pipelineCfg.Campaigns.Root = t.TempDir()

	_, err := resolveCampaignConfigPath(pipelineCfg, "../icewind", "")
	if err == nil {
		t.Fatal("expected error, got nil")
	}
	if !strings.Contains(err.Error(), "single path segment") {
		t.Fatalf("error = %q, want path segment guidance", err.Error())
	}
}