package editor

import (
	"testing"
	"time"

	"pad/internal/io/pool/mock"
)

func TestAutoSaveE2E(t *testing.T) {
	// 1. Setup
	mockFS := mock.NewFileSystem()
	filename := "/test.txt"
	initialContent := "Hello"
	mockFS.AddFile(filename, []byte(initialContent), time.Now())

	l := NewLogic(mockFS)
	go l.Run()
	defer l.Done()

	// Drain frameChan to prevent deadlocks
	go func() {
		for range l.FrameChan() {
		}
	}()

	l.state.Editor.Filename = filename
	TheState = l.state

	// 2. Open File
	OpenFile(filename)
	l.state.Editor.Buffer = initialContent
	l.state.Editor.CursorPosition = len(initialContent)

	// 3. Edit
	HandleInsert(" World")

	// 4. Trigger auto-save
	l.markDirty()

	// 5. Wait for the write to complete
	success := false
	for i := 0; i < 20; i++ {
		content, _ := mockFS.ReadFile(filename)
		if string(content) == "Hello World" {
			success = true
			break
		}
		time.Sleep(200 * time.Millisecond)
	}

	// 6. Assert
	if !success {
		t.Errorf("Timed out waiting for file to save")
	}
}

func TestFlushOnExitE2E(t *testing.T) {
	// 1. Setup
	mockFS := mock.NewFileSystem()
	filename := "/test.txt"
	initialContent := "Hello"
	mockFS.AddFile(filename, []byte(initialContent), time.Now())

	l := NewLogic(mockFS)
	go l.Run()
	defer l.Done()

	// Drain frameChan to prevent deadlocks
	go func() {
		for range l.FrameChan() {
		}
	}()

	l.state.Editor.Filename = filename
	l.state.Editor.Buffer = initialContent
	TheState = l.state

	// 2. Edit
	l.state.Editor.CursorPosition = len(initialContent)
	HandleInsert(" World")

	// 3. Trigger Flush
	l.FlushAll()

	// 4. Assert
	content, _ := mockFS.ReadFile(filename)
	if string(content) != "Hello World" {
		t.Errorf("Expected 'Hello World', got %q", string(content))
	}
}