package rss

import (
	"errors"
	"fmt"
	"log/slog"
	"net/http"
	"time"

	"go.dev.pztrn.name/rsser/configuration"
	"go.dev.pztrn.name/rsser/outputs"
)

var (
	errNoOutputs = errors.New("no outputs")
	errRSS       = errors.New("RSS controller")
)

// RSS is an RSS feeds parsing controlling structure.
type RSS struct {
	cfg        *configuration.Config
	httpClient *http.Client
	outputs    []outputs.Output
}

// New creates new RSS parsing instance.
func New(cfg *configuration.Config, outs []outputs.Output) (*RSS, error) {
	rss := &RSS{
		cfg:     cfg,
		outputs: outs,
	}

	if err := rss.initialize(); err != nil {
		return nil, fmt.Errorf("%w: %w", errRSS, err)
	}

	return rss, nil
}

func (r *RSS) initialize() error {
	if len(r.outputs) == 0 {
		return fmt.Errorf("initialize: %w", errNoOutputs)
	}

	slog.Info(
		"HTTP client configuration.",
		"request_timeout_seconds", r.cfg.RSS.HTTPClient.RequestTimeoutSeconds,
	)

	r.httpClient = &http.Client{
		Timeout: time.Second * time.Duration(r.cfg.RSS.HTTPClient.RequestTimeoutSeconds),
	}

	return nil
}