package httpapi

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

	"data-terminal-cloud/internal/identity"
	"data-terminal-cloud/internal/sharing"

	"github.com/google/uuid"
)

func sharingRequest(method, target, body string, authenticated bool) *http.Request {
	request := httptest.NewRequest(method, target, strings.NewReader(body))
	if body != "" {
		request.Header.Set("Content-Type", "application/json")
	}
	if authenticated {
		request = request.WithContext(identity.WithPrincipal(request.Context(), identity.Principal{Issuer: "issuer", Subject: "subject"}))
	}
	return request
}

func TestSharingHandlersRejectInvalidAuthenticationAndInputsBeforeService(t *testing.T) {
	validID := uuid.NewString()
	tests := []struct {
		name    string
		handler http.Handler
		request *http.Request
		status  int
		code    string
	}{
		{"create unauthenticated", CreateSharingGrantHandler(nil), sharingRequest(http.MethodPost, "/api/v1/sharing-grants", `{}`, false), http.StatusUnauthorized, "AUTHENTICATION_REQUIRED"},
		{"create short idempotency", CreateSharingGrantHandler(nil), sharingRequest(http.MethodPost, "/api/v1/sharing-grants", `{}`, true), http.StatusBadRequest, "VALIDATION_FAILED"},
		{"create malformed body", CreateSharingGrantHandler(nil), sharingRequest(http.MethodPost, "/api/v1/sharing-grants", `{`, true), http.StatusBadRequest, "VALIDATION_FAILED"},
		{"create invalid grant", CreateSharingGrantHandler(nil), sharingRequest(http.MethodPost, "/api/v1/sharing-grants", `{"resource_type":"story","resource_id":"bad","grantee_user_id":"bad","expires_at":"2026-08-24T00:00:00Z"}`, true), http.StatusBadRequest, "VALIDATION_FAILED"},
		{"list unauthenticated", ListSharingGrantsHandler(nil), sharingRequest(http.MethodGet, "/api/v1/sharing-grants?subject_id="+validID, "", false), http.StatusUnauthorized, "AUTHENTICATION_REQUIRED"},
		{"list invalid subject", ListSharingGrantsHandler(nil), sharingRequest(http.MethodGet, "/api/v1/sharing-grants?subject_id=bad", "", true), http.StatusBadRequest, "VALIDATION_FAILED"},
		{"revoke unauthenticated", RevokeSharingGrantHandler(nil), sharingRequest(http.MethodPost, "/api/v1/sharing-grants/"+validID+"/revoke", `{}`, false), http.StatusUnauthorized, "AUTHENTICATION_REQUIRED"},
		{"access unauthenticated", AccessSharedResourceHandler(nil), sharingRequest(http.MethodGet, "/api/v1/sharing-grants/"+validID+"/resource", "", false), http.StatusUnauthorized, "AUTHENTICATION_REQUIRED"},
		{"public invalid token", AccessPublicSharedResourceHandler(nil), sharingRequest(http.MethodGet, "/public/v1/sharing-grants/"+validID, "", false), http.StatusBadRequest, "VALIDATION_FAILED"},
		{"edit missing if-match", EditSharedStoryHandler(nil), sharingRequest(http.MethodPatch, "/api/v1/sharing-grants/"+validID+"/story", `{"content":"updated","reason":"review"}`, true), http.StatusPreconditionRequired, "PRECONDITION_REQUIRED"},
	}
	for _, item := range tests {
		t.Run(item.name, func(t *testing.T) {
			if strings.Contains(item.name, "create ") && !strings.Contains(item.name, "unauthenticated") && !strings.Contains(item.name, "short") {
				item.request.Header.Set("Idempotency-Key", "sharing-handler-test-key-1234")
			}
			if strings.Contains(item.name, "revoke") || strings.Contains(item.name, "access unauthenticated") || strings.Contains(item.name, "edit") {
				item.request.SetPathValue("id", validID)
			}
			if strings.Contains(item.name, "public") {
				item.request.SetPathValue("id", validID)
			}
			recorder := httptest.NewRecorder()
			item.handler.ServeHTTP(recorder, item.request)
			if recorder.Code != item.status || !strings.Contains(recorder.Body.String(), item.code) {
				t.Fatalf("status=%d body=%s", recorder.Code, recorder.Body.String())
			}
		})
	}
}

func TestWriteSharingErrorStableMappings(t *testing.T) {
	tests := []struct {
		err    error
		status int
		code   string
	}{
		{sharing.ErrInvalid, http.StatusBadRequest, "VALIDATION_FAILED"},
		{sharing.ErrAccessDenied, http.StatusForbidden, "SHARING_ACCESS_DENIED"},
		{sharing.ErrExpired, http.StatusGone, "SHARING_GRANT_INACTIVE"},
		{sharing.ErrNotFound, http.StatusNotFound, "RESOURCE_NOT_FOUND"},
		{sharing.ErrVersionConflict, http.StatusPreconditionFailed, "VERSION_CONFLICT"},
		{errors.New("database unavailable"), http.StatusInternalServerError, "INTERNAL_ERROR"},
	}
	for _, item := range tests {
		recorder := httptest.NewRecorder()
		request := httptest.NewRequest(http.MethodGet, "/api/v1/sharing-grants", nil)
		writeSharingError(recorder, request, item.err)
		if recorder.Code != item.status || !strings.Contains(recorder.Body.String(), item.code) {
			t.Fatalf("error=%v status=%d body=%s", item.err, recorder.Code, recorder.Body.String())
		}
	}
}