package movies

import (
	"fmt"
	"hugo-medialog/utils"
	"os"
	"path/filepath"

	"gopkg.in/yaml.v3"
)

func LoadMovies() ([]Movie, error) {
	moviesFile := os.Getenv("OBSIDIAN_MOVIES_FILE")
	fileData, err := os.ReadFile(moviesFile)
	if err != nil {
		return nil, err
	}

	var movies []Movie
	err = yaml.Unmarshal(fileData, &movies)
	if err != nil {
		return nil, err
	}

	return movies, nil
}

func ProcessMovies(movies []Movie, update bool) error {
	utils.Sep()
	fmt.Printf(" M O V I E S\n")
	utils.Sep()
	for _, movie := range movies {
		// Debug print
		fmt.Printf("Título: %s\n", movie.Title)

		// If we're updating, the process is a bit different
		if update || !movie.New {
			outputDir := os.Getenv("MARKDOWN_OUTPUT_MOVIES_DIR")
			mdFilePath := filepath.Join(outputDir, fmt.Sprintf("%s.md", utils.Sluggify(movie.Title)))
			frontmatter, content, err := utils.LoadMarkdown(mdFilePath)
			if err != nil {
				fmt.Printf(" ! Error loading markdown frontmatter for movie %s: %v\n", movie.Title, err)
				continue
			}
			updatedFrontmatter := updateFrontmatterWithYAML(frontmatter, movie)
			err = utils.SaveUpdatedMarkdown(mdFilePath, updatedFrontmatter, content)
			if err != nil {
				fmt.Printf(" ! Error saving updated markdown for movie %s: %v\n", movie.Title, err)
				continue
			}
			// We want to continue the loop here, in update's cases we don't
			// want to do any api calls for info nor for images
			continue
		}

		// If we dont have IDs, search movie by Title and get the IDs
		if movie.IDs.Trakt == 0 {
			err := SearchMovieByTitle(movie.Title, &movie)
			if err != nil {
				fmt.Printf(" ! Error searching movie by title %s: %s\n", movie.Title, err)
				continue
			}
		}

		// Now we need to get the images from fanart
		posterURL, backgroundURL, logoURL, err := FetchImagesFromFanart(movie.IDs.TMDB)
		if err != nil {
			fmt.Printf(" ! Error fetching images from Fanart.tv for %s: %s\n", movie.Title, err)
			continue
		}

		imageTypes := []struct {
			URL       string
			ImageType string
			SetField  func(imagePath string)
		}{
			{
				URL:       posterURL,
				ImageType: "poster",
				SetField:  func(imagePath string) { movie.Poster = imagePath },
			},
			{
				URL:       backgroundURL,
				ImageType: "background",
				SetField:  func(imagePath string) { movie.Background = imagePath },
			},
			{
				URL:       logoURL,
				ImageType: "logo",
				SetField:  func(imagePath string) { movie.Image = imagePath },
			},
		}

		for _, image := range imageTypes {
			if image.URL != "" {
				err := DownloadImage(image.URL, movie.IDs.Slug, image.ImageType)
				if err != nil {
					fmt.Printf(" ! Error downloading %s for %s: %s\n", image.ImageType, movie.Title, err)
				} else {
					image.SetField(fmt.Sprintf("%s-%s.jpg", movie.IDs.Slug, image.ImageType))
				}
			}
		}
		// utils.Debug(movie)

		err = generateMovieMarkdown(movie)
		if err != nil {
			return err
		}
		utils.Sep()
	}
	return nil
}

func generateMovieMarkdown(movie Movie) error {
	templatePath := filepath.Join(os.Getenv("TEMPLATES_DIR"), "movie.md.tpl")
	outputDir := os.Getenv("MARKDOWN_OUTPUT_MOVIES_DIR")
	if err := utils.CreateDirIfNotExists(outputDir); err != nil {
		return err
	}
	outputPath := filepath.Join(outputDir, fmt.Sprintf("%s.md", movie.IDs.Slug))

	data := map[string]interface{}{
		"Title":      movie.Title,
		"Link":       movie.Link,
		"Subtitle":   movie.Year,
		"Year":       movie.Year,
		"Rate":       movie.Rate,
		"Progress":   movie.Progress,
		"Image":      movie.Image,
		"Poster":     movie.Poster,
		"Background": movie.Background,
		"Date":       movie.Date,
		"Tags":       "watching",
	}

	return utils.GenerateMarkdown(templatePath, outputPath, data)
}

// Helper function to update only YAML fields that exist in both the frontmatter and YAML data
func updateFrontmatterWithYAML(frontmatter utils.FrontMatter, movie Movie) utils.FrontMatter {
	frontmatter.Progress = movie.Progress
	frontmatter.Date = movie.Date
	frontmatter.Rate = movie.Rate
	return frontmatter
}