package rabbitmq

import (
	"fmt"
	"git.sch9.ru/new_gate/ms-runner/internal/runner"
	"git.sch9.ru/new_gate/ms-runner/internal/runner/usecase"
	runnerv1 "git.sch9.ru/new_gate/ms-runner/pkg/go/gen/proto/runner/v1"
	"github.com/golang/protobuf/proto"
	amqp "github.com/rabbitmq/amqp091-go"
)

func NewRunnerBuilderConsumer(ch *amqp.Channel, runnerUC runner.RunnerUseCase, queueName string, instanceName string) {
	msgs, err := ch.Consume(
		queueName,
		instanceName,
		false,
		false,
		false,
		false,
		nil,
	)
	if err != nil {
		panic(err)
	}

	go func() {
		for {
			runnerUC.Lock()
			if !runnerUC.Ready() {
				continue
			}
			runnerUC.Unlock()

			select {
			case d := <-msgs:
				var msg runnerv1.Instruction

				err = proto.Unmarshal(d.Body, &msg)
				if err != nil {
					panic(err)
				}

				switch msg.Instruction.(type) {
				case *runnerv1.Instruction_Build:
					err = runnerUC.Process(usecase.BuildInstruction{
						SolutionId: msg.GetBuild().GetSolutionId(),
						BindingKey: msg.GetBuild().GetBindingKey(),
						Language:   msg.GetBuild().GetLanguage(),
						Solution:   msg.GetBuild().GetSolution(),
					})
					if err != nil {
						fmt.Println(err)
					} else {
						err = d.Ack(false)
						if err != nil {
							panic(err)
						}
					}
				case *runnerv1.Instruction_Run:
					err = runnerUC.Process(usecase.RunInstruction{
						SolutionId: msg.GetRun().GetSolutionId(),
						TestId:     msg.GetRun().GetTestId(),
						BindingKey: msg.GetRun().GetBindingKey(),
					})
					if err != nil {
						fmt.Println(err)
					} else {
						err = d.Ack(false)
						if err != nil {
							panic(err)
						}
					}
				default:
					fmt.Println("unknown instruction: ", msg.Instruction)
				}
			}
		}
	}()
}

func NewRunnerBuilderProducer(ch *amqp.Channel, runnerUC runner.RunnerUseCase) {
	go func() {
		for res := range runnerUC.Results() {
			var (
				body       []byte
				err        error
				bindingKey string
			)

			switch result := res.(type) {
			case usecase.BuildResult:
				msg := &runnerv1.Result{
					Result: &runnerv1.Result_Build{
						Build: &runnerv1.BuildResult{
							SolutionId: result.SolutionId,
							Status:     result.Status,
						},
					},
				}
				body, err = proto.Marshal(msg)
				if err != nil {
					panic(err)
				}
				bindingKey = result.BindingKey
			case usecase.RunResult:
				msg := &runnerv1.Result{
					Result: &runnerv1.Result_Run{
						Run: &runnerv1.RunResult{
							SolutionId: result.SolutionId,
							TestId:     result.TestId,
							Status:     result.Status,
						},
					},
				}
				body, err = proto.Marshal(msg)
				if err != nil {
					panic(err)
				}
				bindingKey = result.BindingKey
			default:
				fmt.Println("unknown result: ", result)
				continue
			}

			fmt.Println("publishing: ", bindingKey)
			err = ch.Publish(
				"",
				bindingKey,
				false,
				false,
				amqp.Publishing{
					ContentType: "text/plain",
					Body:        body,
				})
			if err != nil {
				panic(err)
			}
		}
	}()
}