package handlers

import (
	"bytes"
	"encoding/json"
	"net/http"
	"net/http/httptest"
	"testing"

	"bookhoard/internal/database"

	"github.com/google/uuid"
	"github.com/jackc/pgx/v5/pgtype"
	"github.com/labstack/echo/v5"
	"github.com/stretchr/testify/assert"
)

func TestPreviewCollection_NoAuth(t *testing.T) {
	e := echo.New()
	handler := &CollectionHandler{}

	reqBody := map[string]interface{}{
		"library_id":      uuid.New().String(),
		"rules":           []map[string]interface{}{},
		"manual_book_ids": []string{},
		"limit":           20,
	}
	body, _ := json.Marshal(reqBody)

	req := httptest.NewRequest("POST", "/api/collections/preview", bytes.NewBuffer(body))
	req.Header.Set("Content-Type", "application/json")
	rec := httptest.NewRecorder()

	c := e.NewContext(req, rec)

	err := handler.PreviewCollection(c)
	assert.NoError(t, err)

	assert.Equal(t, http.StatusUnauthorized, rec.Code)
}

func TestPreviewCollection_MissingLibraryID(t *testing.T) {
	e := echo.New()
	handler := &CollectionHandler{}

	reqBody := map[string]interface{}{
		"library_id":      "",
		"rules":           []map[string]interface{}{},
		"manual_book_ids": []string{},
		"limit":           20,
	}
	body, _ := json.Marshal(reqBody)

	req := httptest.NewRequest("POST", "/api/collections/preview", bytes.NewBuffer(body))
	req.Header.Set("Content-Type", "application/json")
	rec := httptest.NewRecorder()

	// Mock user (would normally come from middleware)
	user := database.Users{
		ID: pgtype.UUID{Bytes: uuid.New(), Valid: true},
	}
	c := e.NewContext(req, rec)
	c.Set("user", user)

	err := handler.PreviewCollection(c)
	assert.NoError(t, err)

	assert.Equal(t, http.StatusBadRequest, rec.Code)
}

func TestPreviewCollection_InvalidLibraryID(t *testing.T) {
	e := echo.New()
	handler := &CollectionHandler{}

	reqBody := map[string]interface{}{
		"library_id":      "invalid-uuid",
		"rules":           []map[string]interface{}{},
		"manual_book_ids": []string{},
		"limit":           20,
	}
	body, _ := json.Marshal(reqBody)

	req := httptest.NewRequest("POST", "/api/collections/preview", bytes.NewBuffer(body))
	req.Header.Set("Content-Type", "application/json")
	rec := httptest.NewRecorder()

	// Mock user
	user := database.Users{
		ID: pgtype.UUID{Bytes: uuid.New(), Valid: true},
	}
	c := e.NewContext(req, rec)
	c.Set("user", user)

	err := handler.PreviewCollection(c)
	assert.NoError(t, err)

	assert.Equal(t, http.StatusBadRequest, rec.Code)
}