package main

import (
	"context"
	"fmt"
)

type SlackToMessage struct {
	pipeline Pipeline
}

func NewSlackToMessagePipeline(ctx context.Context, cfg Config) (Pipeline, error) {
	reader, err := NewQueue(ctx, "slack_event", cfg.driver)
	if err != nil {
		return Pipeline{}, err
	}
	writer, err := NewQueue(ctx, "new_message", cfg.driver)
	if err != nil {
		return Pipeline{}, err
	}
	return Pipeline{
		writer:  writer,
		reader:  reader,
		process: newSlackToMessageProcess(cfg),
	}, nil
}

func newSlackToMessageProcess(cfg Config) processFunc {
	return func(ctx context.Context, slack []byte) ([]byte, error) {
		m, err := ParseSlack(slack, cfg.AssetPattern, cfg.DatacenterPattern, cfg.EventNamePattern)
		if err != nil {
			return nil, fmt.Errorf("failed to deserialize slack %w: %s", err, slack)
		}
		return m.Serialize(), nil
	}
}