package api_impl

// SPDX-License-Identifier: GPL-3.0-or-later

import (
	"context"
	"net/http"
	"testing"

	"github.com/golang/mock/gomock"
	"github.com/stretchr/testify/assert"

	"git.blender.org/flamenco/internal/manager/persistence"
	"git.blender.org/flamenco/pkg/api"
)

func TestTaskScheduleHappy(t *testing.T) {
	mockCtrl := gomock.NewController(t)
	defer mockCtrl.Finish()

	mf := newMockedFlamenco(mockCtrl)
	worker := testWorker()

	echo := mf.prepareMockedRequest(nil)
	requestWorkerStore(echo, &worker)

	// Expect a call into the persistence layer, which should return a scheduled task.
	job := persistence.Job{
		UUID: "583a7d59-887a-4c6c-b3e4-a753018f71b0",
	}
	task := persistence.Task{
		UUID: "4107c7aa-e86d-4244-858b-6c4fce2af503",
		Job:  &job,
	}
	mf.persistence.EXPECT().ScheduleTask(echo.Request().Context(), &worker).Return(&task, nil)

	err := mf.flamenco.ScheduleTask(echo)
	assert.NoError(t, err)

	// Check the response
	assignedTask := api.AssignedTask{
		Uuid:     task.UUID,
		Job:      job.UUID,
		Commands: []api.Command{},
	}
	assertJSONResponse(t, echo, http.StatusOK, assignedTask)
	resp := getRecordedResponse(echo)
	assert.Equal(t, http.StatusOK, resp.StatusCode)
}

func TestTaskScheduleNonActiveStatus(t *testing.T) {
	mockCtrl := gomock.NewController(t)
	defer mockCtrl.Finish()

	mf := newMockedFlamenco(mockCtrl)
	worker := testWorker()
	worker.Status = api.WorkerStatusAsleep

	// Explicitly NO expected calls to the persistence layer. Since the worker is
	// not in a state that allows task execution, there should be no DB queries.

	echoCtx := mf.prepareMockedRequest(nil)
	requestWorkerStore(echoCtx, &worker)
	err := mf.flamenco.ScheduleTask(echoCtx)
	assert.NoError(t, err)

	resp := getRecordedResponse(echoCtx)
	assert.Equal(t, http.StatusConflict, resp.StatusCode)
}

func TestTaskScheduleOtherStatusRequested(t *testing.T) {
	mockCtrl := gomock.NewController(t)
	defer mockCtrl.Finish()

	mf := newMockedFlamenco(mockCtrl)
	worker := testWorker()
	worker.StatusRequested = api.WorkerStatusAsleep

	// Explicitly NO expected calls to the persistence layer. Since the worker is
	// not in a state that allows task execution, there should be no DB queries.

	echoCtx := mf.prepareMockedRequest(nil)
	requestWorkerStore(echoCtx, &worker)
	err := mf.flamenco.ScheduleTask(echoCtx)
	assert.NoError(t, err)

	expectBody := api.WorkerStateChange{StatusRequested: api.WorkerStatusAsleep}
	assertJSONResponse(t, echoCtx, http.StatusLocked, expectBody)
}

func TestWorkerSignoffTaskRequeue(t *testing.T) {
	mockCtrl := gomock.NewController(t)
	defer mockCtrl.Finish()

	mf := newMockedFlamenco(mockCtrl)
	worker := testWorker()

	job := persistence.Job{
		UUID: "583a7d59-887a-4c6c-b3e4-a753018f71b0",
	}
	// Mock that the worker has two active tasks. It shouldn't happen, but even
	// when it does, both should be requeued when the worker signs off.
	task1 := persistence.Task{
		UUID:   "4107c7aa-e86d-4244-858b-6c4fce2af503",
		Job:    &job,
		Status: api.TaskStatusActive,
	}
	task2 := persistence.Task{
		UUID:   "beb3f39b-57a5-44bf-a0ad-533e3513a0b6",
		Job:    &job,
		Status: api.TaskStatusActive,
	}
	workerTasks := []*persistence.Task{&task1, &task2}

	// Signing off should be handled completely, even when the HTTP connection
	// breaks. This means using a different context than the one passed by Echo.
	echo := mf.prepareMockedRequest(nil)
	requestWorkerStore(echo, &worker)
	expectCtx := gomock.Not(gomock.Eq(echo.Request().Context()))

	// Expect worker's tasks to be re-queued.
	mf.persistence.EXPECT().
		FetchTasksOfWorkerInStatus(expectCtx, &worker, api.TaskStatusActive).
		Return(workerTasks, nil)
	mf.stateMachine.EXPECT().TaskStatusChange(expectCtx, &task1, api.TaskStatusQueued)
	mf.stateMachine.EXPECT().TaskStatusChange(expectCtx, &task2, api.TaskStatusQueued)

	// Expect worker to be saved as 'offline'.
	mf.persistence.EXPECT().
		SaveWorkerStatus(expectCtx, &worker).
		Do(func(ctx context.Context, w *persistence.Worker) error {
			assert.Equal(t, api.WorkerStatusOffline, w.Status)
			return nil
		})

	err := mf.flamenco.SignOff(echo)
	assert.NoError(t, err)

	resp := getRecordedResponse(echo)
	assert.Equal(t, http.StatusNoContent, resp.StatusCode)
}