package cmd

import (
	"fmt"
	"os"
	"strconv"
	"strings"
	"gitea.dcglab.co.uk/steve/arrman/sonarr"
)

func filterSeries(series []sonarr.Series, term string) []sonarr.Series {
	lower := strings.ToLower(term)
	var filtered []sonarr.Series
	for _, s := range series {
		if strings.Contains(strings.ToLower(s.Title), lower) {
			filtered = append(filtered, s)
		}
	}
	return filtered
}

type SonarrClient interface {
	List() ([]sonarr.Series, error)
	Lookup(term string) ([]sonarr.Series, error)
	Get(id int) (*sonarr.Series, error)
	QualityProfiles() ([]sonarr.QualityProfile, error)
	RootFolders() ([]sonarr.RootFolder, error)
	Add(s sonarr.Series) (*sonarr.Series, error)
}

func TVList(client SonarrClient, term string, includeExternal bool, jsonOut bool) error {
	var series []sonarr.Series
	var err error

	if term != "" && includeExternal {
		series, err = client.Lookup(term)
	} else {
		series, err = client.List()
		if err == nil && term != "" {
			series = filterSeries(series, term)
		}
	}
	if err != nil {
		return err
	}

	if jsonOut {
		out := make([]jsonSeries, len(series))
		for i, s := range series {
			out[i] = seriesToJSON(s)
		}
		return writeJSON(out)
	}

	if len(series) == 0 {
		fmt.Println("No series found")
		return nil
	}

	for _, s := range series {
		eps := ""
		if s.Statistics != nil {
			pct := 0.0
			if s.Statistics.EpisodeCount > 0 {
				pct = float64(s.Statistics.EpisodeFileCount) / float64(s.Statistics.EpisodeCount) * 100
			}
			eps = fmt.Sprintf(" — Episodes: %d/%d (%.0f%%)", s.Statistics.EpisodeFileCount, s.Statistics.EpisodeCount, pct)
		}
		fmt.Printf("%s (%d) — %s%s\n", s.Title, s.Year, s.Status, eps)
	}
	return nil
}

func TVAdd(client SonarrClient, args []string, jsonOut bool) error {
	term, profile, rootfolder, err := parseAddArgs(args)
	if err != nil {
		return err
	}

	profileID, err := strconv.Atoi(profile)
	if err != nil {
		return fmt.Errorf("--profile must be a number")
	}

	var series *sonarr.Series

	// Check if term is all digits (TVDB ID)
	if isAllDigits(term) {
		results, err := client.Lookup("tvdb:" + term)
		if err != nil {
			return err
		}
		if len(results) == 0 {
			return fmt.Errorf("No series found with TVDB ID %s", term)
		}
		series = &results[0]
	} else {
		results, err := client.Lookup(term)
		if err != nil {
			return err
		}
		if len(results) == 0 {
			return fmt.Errorf("No series found for '%s'", term)
		}

		// Rank results by similarity
		titles := make([]string, len(results))
		for i, s := range results {
			titles[i] = s.Title
		}
		ranked := rankMatches(term, titles)

		if ranked[0].Similarity >= fuzzyThreshold {
			series = &results[ranked[0].Index]
		} else {
			if jsonOut {
				suggestions := jsonSuggestions{
					Error:       fmt.Sprintf("no match for '%s'", term),
					Suggestions: make([]jsonSuggestion, 0),
				}
				limit := 5
				if len(ranked) < limit {
					limit = len(ranked)
				}
				for _, m := range ranked[:limit] {
					s := results[m.Index]
					suggestions.Suggestions = append(suggestions.Suggestions, jsonSuggestion{
						Title:  s.Title,
						Year:   s.Year,
						TvdbID: s.TvdbID,
					})
				}
				writeJSON(suggestions)
				return fmt.Errorf("no match found")
			}
			fmt.Fprintf(os.Stderr, "No match for '%s'. Did you mean:\n", term)
			limit := 5
			if len(ranked) < limit {
				limit = len(ranked)
			}
			for _, m := range ranked[:limit] {
				s := results[m.Index]
				fmt.Fprintf(os.Stderr, "  %s (%d) — TVDB ID: %d\n", s.Title, s.Year, s.TvdbID)
			}
			return fmt.Errorf("no match found")
		}
	}

	if series.ID != 0 {
		return fmt.Errorf("'%s' (%d) is already in your library", series.Title, series.Year)
	}

	series.QualityProfileID = profileID
	series.RootFolderPath = rootfolder
	series.Monitored = true
	series.AddOptions = &sonarr.AddOptions{SearchForMissingEpisodes: true}

	result, err := client.Add(*series)
	if err != nil {
		return err
	}

	if jsonOut {
		return writeJSON(jsonAdded{
			Status: "added",
			Title:  result.Title,
			Year:   result.Year,
			TvdbID: result.TvdbID,
		})
	}

	fmt.Printf("Added: %s (%d) — TVDB ID: %d\n", result.Title, result.Year, result.TvdbID)
	return nil
}

func TVSummary(client SonarrClient, term string, jsonOut bool) error {
	if term == "" {
		return fmt.Errorf("usage: arrman tv summary <title or TVDB ID>")
	}

	var s *sonarr.Series

	if isAllDigits(term) {
		results, err := client.Lookup("tvdb:" + term)
		if err != nil {
			return err
		}
		if len(results) == 0 {
			return fmt.Errorf("No series found with TVDB ID %s", term)
		}
		s = &results[0]
	} else {
		results, err := client.Lookup(term)
		if err != nil {
			return err
		}
		if len(results) == 0 {
			return fmt.Errorf("No series found for '%s'", term)
		}
		// Use best fuzzy match
		titles := make([]string, len(results))
		for i, r := range results {
			titles[i] = r.Title
		}
		ranked := rankMatches(term, titles)
		s = &results[ranked[0].Index]
	}

	if jsonOut {
		return writeJSON(seriesToJSON(*s))
	}

	fmt.Printf("Title: %s\n", s.Title)
	fmt.Printf("Year: %d\n", s.Year)
	fmt.Printf("Status: %s\n", s.Status)
	if s.Network != "" {
		fmt.Printf("Network: %s\n", s.Network)
	}
	fmt.Printf("Seasons: %d\n", s.SeasonCount)
	if s.Statistics != nil {
		pct := 0.0
		if s.Statistics.EpisodeCount > 0 {
			pct = float64(s.Statistics.EpisodeFileCount) / float64(s.Statistics.EpisodeCount) * 100
		}
		fmt.Printf("Episodes: %d/%d (%.0f%%)\n", s.Statistics.EpisodeFileCount, s.Statistics.EpisodeCount, pct)
	}
	if s.NextAiring != "" {
		fmt.Printf("Next Airing: %s\n", s.NextAiring)
	}
	if s.Added != "" {
		fmt.Printf("Added: %s\n", s.Added)
	}
	if s.Overview != "" {
		fmt.Printf("Overview: %s\n", s.Overview)
	}

	return nil
}

func TVProfiles(client SonarrClient, jsonOut bool) error {
	profiles, err := client.QualityProfiles()
	if err != nil {
		return err
	}
	if jsonOut {
		out := make([]jsonProfile, len(profiles))
		for i, p := range profiles {
			out[i] = jsonProfile{ID: p.ID, Name: p.Name}
		}
		return writeJSON(out)
	}
	for _, p := range profiles {
		fmt.Printf("ID: %d — Name: %s\n", p.ID, p.Name)
	}
	return nil
}

func TVRootFolders(client SonarrClient, jsonOut bool) error {
	folders, err := client.RootFolders()
	if err != nil {
		return err
	}
	if jsonOut {
		out := make([]jsonRootFolder, len(folders))
		for i, f := range folders {
			out[i] = jsonRootFolder{ID: f.ID, Path: f.Path, FreeSpace: f.FreeSpace, FreeHuman: formatBytes(f.FreeSpace)}
		}
		return writeJSON(out)
	}
	for _, f := range folders {
		fmt.Printf("ID: %d — Path: %s — Free: %s\n", f.ID, f.Path, formatBytes(f.FreeSpace))
	}
	return nil
}

func seriesToJSON(s sonarr.Series) jsonSeries {
	js := jsonSeries{
		Title:       s.Title,
		Year:        s.Year,
		Status:      s.Status,
		TvdbID:      s.TvdbID,
		Network:     s.Network,
		SeasonCount: s.SeasonCount,
		NextAiring:  s.NextAiring,
		Overview:    s.Overview,
		Added:       s.Added,
	}
	if s.Statistics != nil {
		js.EpisodesHave = s.Statistics.EpisodeFileCount
		js.EpisodesTotal = s.Statistics.EpisodeCount
	}
	return js
}