package series

import (
	"encoding/json"
	"fmt"
	"hugo-medialog/utils"
	"io/ioutil"
	"net/http"
	"os"
	"path/filepath"
	"strconv"
)

// FanartResponse Struct
type FanartResponse struct {
	SeriePosters     []FanartImage `json:"tvposter"`
	SerieBackgrounds []FanartImage `json:"showbackground"`
	SerieLogos       []FanartImage `json:"hdtvlogo"`
}

// FanartImage struct
type FanartImage struct {
	URL   string `json:"url"`
	Likes string `json:"likes"`
}

func FetchImagesFromFanart(ID int) (posterURL, backgroundURL string, logoURL string, err error) {
	fanartAPIKey := os.Getenv("FANART_API_KEY")
	url := fmt.Sprintf("https://webservice.fanart.tv/v3/tv/%s?api_key=%s", strconv.Itoa(ID), fanartAPIKey)

	resp, err := http.Get(url)
	if err != nil {
		return "", "", "", fmt.Errorf("error fetching data from fanart.tv: %w", err)
	}
	defer resp.Body.Close()

	if resp.StatusCode != http.StatusOK {
		return "", "", "", fmt.Errorf("fanart.tv returned non-200 status: %d", resp.StatusCode)
	}

	body, err := ioutil.ReadAll(resp.Body)
	if err != nil {
		return "", "", "", fmt.Errorf("error reading response body: %w", err)
	}

	var fanartResp FanartResponse
	err = json.Unmarshal(body, &fanartResp)
	if err != nil {
		return "", "", "", fmt.Errorf("error unmarshalling response: %w", err)
	}

	// Get the most voted poster
	if len(fanartResp.SeriePosters) > 0 {
		posterURL = fanartResp.SeriePosters[0].URL
	}

	// Get the most voted background
	if len(fanartResp.SerieBackgrounds) > 0 {
		backgroundURL = fanartResp.SerieBackgrounds[0].URL
	}

	// Get the most voted logo
	if len(fanartResp.SerieLogos) > 0 {
		logoURL = fanartResp.SerieLogos[0].URL
	}

	return posterURL, backgroundURL, logoURL, nil
}

func DownloadImage(url, slug, imageType string) error {
	imageDir := filepath.Join(os.Getenv("MARKDOWN_OUTPUT_SERIES_DIR"), os.Getenv("IMAGES_OUTPUT_DIR"))
	if err := utils.CreateDirIfNotExists(imageDir); err != nil {
		return err
	}
	filename := fmt.Sprintf("%s-%s.jpg", slug, imageType)
	filePath := filepath.Join(imageDir, filename)

	resp, err := http.Get(url)
	if err != nil {
		return fmt.Errorf("error downloading image: %w", err)
	}
	defer resp.Body.Close()

	if resp.StatusCode != http.StatusOK {
		return fmt.Errorf("non-200 response while downloading image: %d", resp.StatusCode)
	}

	file, err := os.Create(filePath)
	if err != nil {
		return fmt.Errorf("error creating image file: %w", err)
	}
	defer file.Close()

	body, err := ioutil.ReadAll(resp.Body)
	if err != nil {
		return fmt.Errorf("error reading image data: %w", err)
	}

	_, err = file.Write(body)
	if err != nil {
		return fmt.Errorf("error writing image data: %w", err)
	}

	fmt.Printf(" - Image saved successfully at: %s\n", filePath)

	// Generate thumbnails for the specified resolutions
	thumbnail_slug := fmt.Sprintf("%s-%s", slug, imageType)
	resolutions := []uint{1024, 640, 320} // Define resolutions array for thumbnails
	if err := utils.GenerateThumbnails(filePath, thumbnail_slug, imageDir, resolutions); err != nil {
		return fmt.Errorf("error generating thumbnails: %w", err)
	}

	return nil
}