package ws

import (
	"context"
	"path/filepath"
	"sync"
	"testing"
	"time"

	"everypublish/server/internal/config"
	"everypublish/server/internal/models"
	"everypublish/server/internal/platform"
	"everypublish/server/internal/task"

	gormsqlite "gorm.io/driver/sqlite"
	"gorm.io/gorm"
)

type testPlatformAdapter struct {
	mu       sync.Mutex
	called   int
	block    bool
	canceled chan struct{}
}

func (a *testPlatformAdapter) Platform() string { return "test-platform" }
func (a *testPlatformAdapter) BeginLogin(context.Context) (platform.LoginSession, error) {
	return platform.LoginSession{}, nil
}
func (a *testPlatformAdapter) PollLogin(context.Context, string) (platform.LoginPoll, error) {
	return platform.LoginPoll{}, nil
}
func (a *testPlatformAdapter) SaveCredentials(uint64, uint64, string) error { return nil }
func (a *testPlatformAdapter) Publish(ctx context.Context, in platform.PublishInput) (platform.PublishResult, error) {
	a.mu.Lock()
	a.called++
	a.mu.Unlock()
	if a.block {
		select {
		case <-ctx.Done():
			close(a.canceled)
			return platform.PublishResult{}, ctx.Err()
		case <-time.After(2 * time.Second):
		}
	}
	return platform.PublishResult{URL: "https://example.test/task/" + in.Title, Receipt: "receipt"}, nil
}

func platformTestDB(t *testing.T) *gorm.DB {
	t.Helper()
	db, err := gorm.Open(gormsqlite.Open(filepath.Join(t.TempDir(), "dispatcher.db")), &gorm.Config{})
	if err != nil {
		t.Fatal(err)
	}
	if err = db.AutoMigrate(&models.Task{}, &models.TaskEvent{}, &models.Account{}, &models.Material{}, &models.TransferToken{}, &models.Notification{}); err != nil {
		t.Fatal(err)
	}
	return db
}

func TestDispatcherUsesRegisteredPlatformAndPublishesPerAccount(t *testing.T) {
	db := platformTestDB(t)
	account := models.Account{WorkspaceID: 1, Platform: "test-platform", Status: "active"}
	material := models.Material{WorkspaceID: 1, Name: "video.mp4", Status: "ready", StorageKey: "1/video.mp4"}
	if err := db.Create(&account).Error; err != nil {
		t.Fatal(err)
	}
	if err := db.Create(&material).Error; err != nil {
		t.Fatal(err)
	}
	row := models.Task{WorkspaceID: 1, Title: "platform", Status: task.Queued, AccountIDs: "[1]", MaterialIDs: "[1]"}
	if err := db.Create(&row).Error; err != nil {
		t.Fatal(err)
	}
	adapter := &testPlatformAdapter{}
	registry := platform.NewRegistry()
	if err := registry.Register(adapter); err != nil {
		t.Fatal(err)
	}
	d := NewDispatcher(db, NewHub(), &config.Config{ExecutorMode: "web", BaseURL: "http://127.0.0.1:8090"})
	d.Registry = registry
	if !d.TryDispatch(row.ID) {
		t.Fatal("registered adapter should accept queued task")
	}
	deadline := time.Now().Add(2 * time.Second)
	for time.Now().Before(deadline) {
		var got models.Task
		if err := db.First(&got, row.ID).Error; err != nil {
			t.Fatal(err)
		}
		if got.Status == task.Success {
			if got.PublishedURLs != `["https://example.test/task/platform"]` || got.Receipts != `["receipt"]` {
				t.Fatalf("unexpected platform result: urls=%s receipts=%s", got.PublishedURLs, got.Receipts)
			}
			adapter.mu.Lock()
			called := adapter.called
			adapter.mu.Unlock()
			if called != 1 {
				t.Fatalf("adapter called %d times", called)
			}
			return
		}
		time.Sleep(20 * time.Millisecond)
	}
	t.Fatal("platform task did not reach success")
}

func TestDispatcherCancelStopsRegisteredPlatform(t *testing.T) {
	db := platformTestDB(t)
	account := models.Account{WorkspaceID: 1, Platform: "test-platform", Status: "active"}
	material := models.Material{WorkspaceID: 1, Name: "video.mp4", Status: "ready", StorageKey: "1/video.mp4"}
	_ = db.Create(&account).Error
	_ = db.Create(&material).Error
	row := models.Task{WorkspaceID: 1, Title: "cancel", Status: task.Queued, AccountIDs: "[1]", MaterialIDs: "[1]"}
	_ = db.Create(&row).Error
	adapter := &testPlatformAdapter{block: true, canceled: make(chan struct{})}
	registry := platform.NewRegistry()
	_ = registry.Register(adapter)
	d := NewDispatcher(db, NewHub(), &config.Config{ExecutorMode: "web", BaseURL: "http://127.0.0.1:8090"})
	d.Registry = registry
	if !d.TryDispatch(row.ID) {
		t.Fatal("registered adapter should accept queued task")
	}
	time.Sleep(60 * time.Millisecond)
	d.Cancel(row.ID)
	select {
	case <-adapter.canceled:
	case <-time.After(time.Second):
		t.Fatal("adapter context was not cancelled")
	}
}