package handlers

import (
	"net/http"
	"net/http/httptest"
	"strings"
	"testing"

	"task-dashboard/internal/models"
)

func TestHandleBucketsCreate_Web_CreatesBucket(t *testing.T) {
	h, cleanup := setupTestHandler(t)
	defer cleanup()

	req := httptest.NewRequest("POST", "/settings/buckets", strings.NewReader("name=Gutters&cycle_days=30&pick_n=2"))
	req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
	w := httptest.NewRecorder()
	h.HandleBucketsCreate(w, req)

	if w.Code != http.StatusOK {
		t.Fatalf("status = %d, want 200, body=%s", w.Code, w.Body.String())
	}
	buckets, err := h.store.GetBuckets()
	if err != nil {
		t.Fatal(err)
	}
	if len(buckets) != 1 || buckets[0].Name != "Gutters" {
		t.Errorf("buckets = %+v", buckets)
	}
}

func TestHandleBucketsCreate_Web_InvalidPickN_Returns400(t *testing.T) {
	h, cleanup := setupTestHandler(t)
	defer cleanup()

	req := httptest.NewRequest("POST", "/settings/buckets", strings.NewReader("name=Gutters&cycle_days=30&pick_n=0"))
	req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
	w := httptest.NewRecorder()
	h.HandleBucketsCreate(w, req)

	if w.Code != http.StatusBadRequest {
		t.Fatalf("status = %d, want 400", w.Code)
	}
}

func TestHandleBucketItemAdd_Web_CreatesAndAssignsTask(t *testing.T) {
	h, cleanup := setupTestHandler(t)
	defer cleanup()
	bucket, err := h.store.CreateBucket("Gutters", 30, 2)
	if err != nil {
		t.Fatal(err)
	}

	req := withURLParam(httptest.NewRequest("POST", "/settings/buckets/"+bucket.ID+"/items", strings.NewReader("title=Clean+gutters")), "id", bucket.ID)
	req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
	w := httptest.NewRecorder()
	h.HandleBucketItemAdd(w, req)

	if w.Code != http.StatusOK {
		t.Fatalf("status = %d, want 200, body=%s", w.Code, w.Body.String())
	}
	items, err := h.store.GetBucketItems(bucket.ID)
	if err != nil {
		t.Fatal(err)
	}
	if len(items) != 1 || items[0].Content != "Clean gutters" || items[0].BucketState != "dormant" {
		t.Errorf("items = %+v", items)
	}
}

func TestHandleBucketItemAdd_Web_EmptyTitle_Returns400(t *testing.T) {
	h, cleanup := setupTestHandler(t)
	defer cleanup()
	bucket, err := h.store.CreateBucket("Gutters", 30, 2)
	if err != nil {
		t.Fatal(err)
	}

	req := withURLParam(httptest.NewRequest("POST", "/settings/buckets/"+bucket.ID+"/items", strings.NewReader("title=")), "id", bucket.ID)
	req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
	w := httptest.NewRecorder()
	h.HandleBucketItemAdd(w, req)

	if w.Code != http.StatusBadRequest {
		t.Fatalf("status = %d, want 400", w.Code)
	}
}

func TestHandleBucketItemRemove_Web_RemovesMembership(t *testing.T) {
	h, cleanup := setupTestHandler(t)
	defer cleanup()
	bucket, err := h.store.CreateBucket("Gutters", 30, 2)
	if err != nil {
		t.Fatal(err)
	}
	if err := h.store.CreateNativeTask(models.Task{ID: "task-1", Content: "Clean gutters", Priority: 1}); err != nil {
		t.Fatal(err)
	}
	if err := h.store.AddBucketItem(bucket.ID, "task-1"); err != nil {
		t.Fatal(err)
	}

	req := httptest.NewRequest("POST", "/settings/buckets/items/remove", strings.NewReader("task_id=task-1"))
	req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
	w := httptest.NewRecorder()
	h.HandleBucketItemRemove(w, req)

	if w.Code != http.StatusOK {
		t.Fatalf("status = %d, want 200, body=%s", w.Code, w.Body.String())
	}
	task, err := h.store.GetNativeTaskByID("task-1")
	if err != nil {
		t.Fatal(err)
	}
	if task.BucketID != "" {
		t.Errorf("task.BucketID = %q, want empty", task.BucketID)
	}
}

func TestHandleBucketDelete_Web_RemovesBucket(t *testing.T) {
	h, cleanup := setupTestHandler(t)
	defer cleanup()
	bucket, err := h.store.CreateBucket("Gutters", 30, 2)
	if err != nil {
		t.Fatal(err)
	}

	req := withURLParam(httptest.NewRequest("DELETE", "/settings/buckets/"+bucket.ID, nil), "id", bucket.ID)
	w := httptest.NewRecorder()
	h.HandleBucketDelete(w, req)

	if w.Code != http.StatusOK {
		t.Fatalf("status = %d, want 200, body=%s", w.Code, w.Body.String())
	}
	buckets, err := h.store.GetBuckets()
	if err != nil {
		t.Fatal(err)
	}
	if len(buckets) != 0 {
		t.Errorf("buckets = %+v, want none", buckets)
	}
}

func TestHandleTabTasks_IncludesBucketsProjectsLabels(t *testing.T) {
	h, cleanup := setupTestHandler(t)
	defer cleanup()
	if _, err := h.store.CreateBucket("Gutters", 30, 1); err != nil {
		t.Fatal(err)
	}
	if _, err := h.store.CreateProject("Home", "#3B82F6"); err != nil {
		t.Fatal(err)
	}
	if err := h.store.SetLabelColor("chore", "#F59E0B"); err != nil {
		t.Fatal(err)
	}

	req := httptest.NewRequest("GET", "/tabs/tasks", nil)
	w := httptest.NewRecorder()
	h.HandleTabTasks(w, req)

	if w.Code != http.StatusOK {
		t.Fatalf("status = %d, want 200, body=%s", w.Code, w.Body.String())
	}

	mock := h.renderer.(*MockRenderer)
	lastCall := mock.Calls[len(mock.Calls)-1]
	data, ok := lastCall.Data.(struct {
		Atoms       []models.Atom
		FutureAtoms []models.Atom
		Boards      []models.Board
		Chains      []models.ChainSummary
		Buckets     []models.BucketSummary
		Projects    []models.Project
		Labels      []models.LabelColor
		Today       string
	})
	if !ok {
		t.Fatalf("unexpected data type %T", lastCall.Data)
	}
	if len(data.Buckets) != 1 || data.Buckets[0].Bucket.Name != "Gutters" {
		t.Errorf("Buckets = %+v", data.Buckets)
	}
	if len(data.Projects) != 1 || data.Projects[0].Name != "Home" {
		t.Errorf("Projects = %+v", data.Projects)
	}
	if len(data.Labels) != 1 || data.Labels[0].Name != "chore" {
		t.Errorf("Labels = %+v", data.Labels)
	}
}