package http

import (
	"context"
	"encoding/json"
	"net/http"
	"net/http/httptest"
	"strings"
	"testing"

	"github.com/nomadcode/nomadcode-core/internal/storage"
	"github.com/nomadcode/nomadcode-core/internal/workitem"
	"github.com/nomadcode/nomadcode-core/internal/workitempipeline"
)

type fakeWorkItemTaskCreator struct {
	task       storage.Task
	err        error
	calledWith *workitempipeline.CreateTaskInput
}

func (f *fakeWorkItemTaskCreator) CreateTaskFromWorkItem(_ context.Context, input workitempipeline.CreateTaskInput) (storage.Task, error) {
	f.calledWith = &input
	return f.task, f.err
}

func TestPlaneTaskRequestBuildsProviderNeutralRef(t *testing.T) {
	req := createPlaneTaskRequest{
		WorkspaceSlug: "  acme  ",
		ProjectID:     "  proj-1  ",
		WorkItemID:    "  work-1  ",
		ExternalURL:   "  https://plane.example/work-1  ",
	}
	ref, err := req.workItemRef()
	if err != nil {
		t.Fatalf("workItemRef returned error: %v", err)
	}
	if ref.Provider != workitem.ProviderID("plane") {
		t.Errorf("provider: got %q", ref.Provider)
	}
	if ref.Tenant != "acme" {
		t.Errorf("tenant: got %q", ref.Tenant)
	}
	if ref.Project != "proj-1" {
		t.Errorf("project: got %q", ref.Project)
	}
	if ref.ID != "work-1" {
		t.Errorf("id: got %q", ref.ID)
	}
	if ref.URL != "https://plane.example/work-1" {
		t.Errorf("url: got %q", ref.URL)
	}
}

func TestCreatePlaneTaskDelegatesToWorkItemPipeline(t *testing.T) {
	creator := &fakeWorkItemTaskCreator{
		task: storage.Task{ID: "task-123", Status: "pending"},
	}
	h := &Handler{planeWorkItemTasks: creator}

	body := `{"workspace_slug":"acme","project_id":"proj-1","work_item_id":"work-1","state_id":"state-1","comment":"my note"}`
	req := httptest.NewRequest(http.MethodPost, "/api/integrations/plane/tasks", strings.NewReader(body))
	req.Header.Set("Content-Type", "application/json")
	rec := httptest.NewRecorder()

	h.CreatePlaneTask(rec, req)

	if rec.Code != http.StatusCreated {
		t.Fatalf("expected %d, got %d: %s", http.StatusCreated, rec.Code, rec.Body.String())
	}
	if creator.calledWith == nil {
		t.Fatal("CreateTaskFromWorkItem was not called")
	}
	if creator.calledWith.Ref.Provider != "plane" {
		t.Errorf("ref.provider: got %q", creator.calledWith.Ref.Provider)
	}
	if creator.calledWith.Ref.Tenant != "acme" {
		t.Errorf("ref.tenant: got %q", creator.calledWith.Ref.Tenant)
	}
	if creator.calledWith.Ref.Project != "proj-1" {
		t.Errorf("ref.project: got %q", creator.calledWith.Ref.Project)
	}
	if creator.calledWith.Ref.ID != "work-1" {
		t.Errorf("ref.id: got %q", creator.calledWith.Ref.ID)
	}
	if creator.calledWith.StateID != "state-1" {
		t.Errorf("state_id: got %q", creator.calledWith.StateID)
	}
	if creator.calledWith.Comment != "my note" {
		t.Errorf("comment: got %q", creator.calledWith.Comment)
	}

	var resp map[string]string
	if err := json.NewDecoder(rec.Body).Decode(&resp); err != nil {
		t.Fatalf("decode response: %v", err)
	}
	if resp["id"] != "task-123" || resp["status"] != "pending" {
		t.Errorf("response: %v", resp)
	}
}

func TestCreatePlaneTaskReturns503WhenPipelineNotConfigured(t *testing.T) {
	h := &Handler{}
	req := httptest.NewRequest(http.MethodPost, "/api/integrations/plane/tasks", strings.NewReader(`{}`))
	rec := httptest.NewRecorder()

	h.CreatePlaneTask(rec, req)

	if rec.Code != http.StatusServiceUnavailable {
		t.Fatalf("expected 503, got %d", rec.Code)
	}
	var resp map[string]string
	if err := json.NewDecoder(rec.Body).Decode(&resp); err != nil {
		t.Fatalf("decode response: %v", err)
	}
	if resp["error"] != "plane client is not configured" {
		t.Errorf("error message: got %q", resp["error"])
	}
}