// basic demonstrates use of the SDK: fetching a single submission and
// printing a few fields.
//
// The example runs anonymously by default. If the FA_A / FA_B (and ideally
// CF_CLEARANCE + FA_UA) environment variables are set, it authenticates
// with them required for any submission FA gates behind login, mature
// content guard, or Cloudflare challenges.
//
//	go run ./examples/basic 12345678
package main

import (
	"context"
	"fmt"
	"log"
	"os"
	"strconv"

	fa "git.anthrove.art/public/go-fa-api"
)

func main() {
	if len(os.Args) < 2 {
		log.Fatalf("usage: %s <submission-id>", os.Args[0])
	}
	id, err := strconv.ParseInt(os.Args[1], 10, 64)
	if err != nil {
		log.Fatalf("invalid submission id: %v", err)
	}

	opts := []fa.Option{fa.WithUserAgent("go-fa-api-example/0.1")}
	if a, b := os.Getenv("FA_A"), os.Getenv("FA_B"); a != "" && b != "" {
		log.Printf("using FA_A/FA_B cookies for authenticated request")
		opts = []fa.Option{
			fa.WithCookies(fa.Cookies{A: a, B: b}),
			fa.WithCloudflare(fa.CFCookies{Clearance: os.Getenv("CF_CLEARANCE")}),
			fa.WithUserAgent(envOr("FA_UA", "go-fa-api-example/0.1")),
		}
	}
	client := fa.New(opts...)

	sub, err := client.GetSubmission(context.Background(), fa.SubmissionID(id))
	if err != nil {
		log.Fatalf("GetSubmission: %v", err)
	}
	fmt.Printf("%s\nby %s\nrating: %s\ntags: %v\nfile: %s\n",
		sub.Title, sub.Author.DisplayName, sub.Rating, sub.Tags, sub.FileURL)
}

func envOr(key, fallback string) string {
	if v := os.Getenv(key); v != "" {
		return v
	}
	return fallback
}