package testsuite

import (
	"context"
	"fmt"
	"testing"
	"time"

	"forge.cadoles.com/cadoles/bouncer/internal/proxy/director/layer/queue"
	"github.com/pkg/errors"
)

type adapterTestCase struct {
	Name string
	Do   func(adapter queue.Adapter) error
}

var adapterTestCases = []adapterTestCase{
	{
		Name: "Test queue ranking",
		Do: func(adapter queue.Adapter) error {
			ctx := context.Background()
			queueName := "test_queue_ranking"

			sessionIdPattern := "session-%d"
			totalSessions := int64(100)

			for idx := int64(0); idx < totalSessions; idx++ {
				sessionId := fmt.Sprintf(sessionIdPattern, idx)
				rank, err := adapter.Touch(ctx, queueName, sessionId)
				if err != nil {
					return errors.Wrapf(err, "could not touch session '%s' (index: %d, rank: %d)", sessionId, idx, rank)
				}

				if e, g := int64(idx), rank; e != g {
					return errors.Errorf("rank('%s'): expected '%v', got '%v'", sessionId, e, g)
				}
			}

			status, err := adapter.Status(ctx, queueName)
			if err != nil {
				return errors.Wrap(err, "could not retrieve queue status")
			}

			if e, g := totalSessions, status.Sessions; e != g {
				return errors.Errorf("status.Sessions: expected '%v', got '%v'", e, g)
			}

			return nil
		},
	},
	{
		Name: "Test session expiration",
		Do: func(adapter queue.Adapter) error {
			ctx := context.Background()
			queueName := "test_session_expiration"

			sessionId := "session-1"

			rank, err := adapter.Touch(ctx, queueName, sessionId)
			if err != nil {
				return errors.Wrapf(err, "could not touch session '%s'", sessionId)
			}

			if e, g := int64(0), rank; e != g {
				return errors.Errorf("rank('%s'): expected '%v', got '%v'", sessionId, e, g)
			}

			<-time.After(time.Second)

			if err := adapter.Refresh(ctx, queueName, time.Second); err != nil {
				return errors.Wrap(err, "could not refresh queue")
			}

			status, err := adapter.Status(ctx, queueName)
			if err != nil {
				return errors.Wrap(err, "could not retrieve queue status")
			}

			if e, g := int64(0), status.Sessions; e != g {
				return errors.Errorf("status.Sessions: expected '%v', got '%v'", e, g)
			}

			return nil
		},
	},
}

func TestAdapter(t *testing.T, adapter queue.Adapter) {
	for _, tc := range adapterTestCases {
		func(tc adapterTestCase) {
			t.Run(tc.Name, func(t *testing.T) {
				if err := tc.Do(adapter); err != nil {
					t.Fatalf("%+v", errors.WithStack(err))
				}
			})
		}(tc)
	}
}