package app

import (
	"context"
	"os"
	"strings"
	"testing"

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

func TestLoadCommandConfigRetainsInitiallyLoadedPipeline(t *testing.T) {
	workspaceRoot := t.TempDir()
	pipelinePath, campaignPath, sessionPath := writeValidConfigFiles(t, workspaceRoot)

	originalLoader := loadPipelineConfigFn
	loadCalls := 0
	loadPipelineConfigFn = func(path string, opts config.PipelineLoadOptions) (*config.PipelineConfig, error) {
		loaded, err := originalLoader(path, opts)
		if err != nil {
			return nil, err
		}
		loadCalls++

		data, err := os.ReadFile(path)
		if err != nil {
			return nil, err
		}
		changedRoot := workspaceRoot + "-changed"
		updated := strings.ReplaceAll(string(data), workspaceRoot, changedRoot)
		if err := os.WriteFile(path, []byte(updated), 0o644); err != nil {
			return nil, err
		}
		return loaded, nil
	}
	t.Cleanup(func() { loadPipelineConfigFn = originalLoader })

	loaded, err := loadCommandConfig(context.Background(), pipelinePath, "", campaignPath, sessionPath, config.SessionLoadOptions{SessionID: "2026-05-03"})
	if err != nil {
		t.Fatalf("loadCommandConfig() error = %v", err)
	}
	defer func() { _ = loaded.Close() }()

	if loadCalls != 1 {
		t.Fatalf("pipeline load calls = %d, want 1", loadCalls)
	}
	if got := loaded.Config.Pipeline.Workspace.Root; got != workspaceRoot {
		t.Fatalf("resolved workspace root = %q, want originally loaded %q", got, workspaceRoot)
	}
}