// Package radarr is a client for the Radarr v3 API.
package radarr

import (
	"context"
	"encoding/json"
	"net/http"
	"net/url"
	"strconv"
	"time"

	"git.stinnesbeck.com/nils/arr-tui/internal/arr"
)

// Client talks to a Radarr instance. The embedded arr.Client provides
// SystemStatus, QualityProfiles and RootFolders.
type Client struct {
	*arr.Client
}

// NewClient returns a Radarr client.
func NewClient(baseURL, apiKey string) *Client {
	return &Client{arr.NewClient(baseURL, apiKey)}
}

// Ratings holds the per-source ratings Radarr reports.
type Ratings struct {
	IMDB           *Rating `json:"imdb,omitempty"`
	TMDB           *Rating `json:"tmdb,omitempty"`
	Metacritic     *Rating `json:"metacritic,omitempty"`
	RottenTomatoes *Rating `json:"rottenTomatoes,omitempty"`
}

// Rating is a single rating value.
type Rating struct {
	Votes int     `json:"votes"`
	Value float64 `json:"value"`
}

// Movie is a lookup result or library movie. ID is 0 when the movie is not
// in the library yet.
type Movie struct {
	ID               int            `json:"id"`
	Title            string         `json:"title"`
	OriginalTitle    string         `json:"originalTitle,omitempty"`
	Year             int            `json:"year"`
	Overview         string         `json:"overview,omitempty"`
	Runtime          int            `json:"runtime"`
	Genres           []string       `json:"genres,omitempty"`
	Studio           string         `json:"studio,omitempty"`
	Status           string         `json:"status,omitempty"`
	TMDBID           int            `json:"tmdbId"`
	IMDBID           string         `json:"imdbId,omitempty"`
	TitleSlug        string         `json:"titleSlug,omitempty"`
	Images           []arr.Image    `json:"images,omitempty"`
	Ratings          Ratings        `json:"ratings"`
	Monitored        bool           `json:"monitored"`
	HasFile          bool           `json:"hasFile"`
	QualityProfileID int            `json:"qualityProfileId"`
	InCinemas        string         `json:"inCinemas,omitempty"` // ISO timestamps, empty if unknown
	PhysicalRelease  string         `json:"physicalRelease,omitempty"`
	DigitalRelease   string         `json:"digitalRelease,omitempty"`
	SizeOnDisk       int64          `json:"sizeOnDisk"`
	IsAvailable      bool           `json:"isAvailable"`
	Path             string         `json:"path,omitempty"`
	MovieFile        *arr.MediaFile `json:"movieFile,omitempty"`
}

// QualityName returns the quality of the downloaded file, or "".
func (m Movie) QualityName() string {
	if m.MovieFile == nil {
		return ""
	}
	return m.MovieFile.Quality.Quality.Name
}

// InLibrary reports whether the movie has already been added to Radarr.
func (m Movie) InLibrary() bool { return m.ID != 0 }

// Rating returns the best available rating (IMDb, then TMDb), or 0.
func (m Movie) Rating() float64 {
	switch {
	case m.Ratings.IMDB != nil && m.Ratings.IMDB.Value > 0:
		return m.Ratings.IMDB.Value
	case m.Ratings.TMDB != nil:
		return m.Ratings.TMDB.Value
	}
	return 0
}

// Lookup searches for movies by free text ("The Matrix"), "tmdb:603" or "imdb:tt0133093".
func (c *Client) Lookup(ctx context.Context, term string) ([]Movie, error) {
	var movies []Movie
	err := c.Do(ctx, http.MethodGet, "movie/lookup", url.Values{"term": {term}}, nil, &movies)
	return movies, err
}

// Movies lists the movies in the library.
func (c *Client) Movies(ctx context.Context) ([]Movie, error) {
	var movies []Movie
	err := c.Do(ctx, http.MethodGet, "movie", nil, nil, &movies)
	return movies, err
}

// MovieByTMDB returns the library movie with the TMDb id, ok=false if the
// library has none. Unlike a lookup it does not ask the metadata provider.
func (c *Client) MovieByTMDB(ctx context.Context, tmdbID int) (Movie, bool, error) {
	var movies []Movie
	err := c.Do(ctx, http.MethodGet, "movie", url.Values{"tmdbId": {strconv.Itoa(tmdbID)}}, nil, &movies)
	for _, m := range movies { // checked: a version that ignores the filter sends the whole library
		if m.TMDBID == tmdbID && m.InLibrary() {
			return m, true, err
		}
	}
	return Movie{}, false, err
}

// AddOptions are the choices from the add form.
type AddOptions struct {
	QualityProfileID    int
	RootFolderPath      string
	Monitored           bool
	SearchNow           bool
	MinimumAvailability string // "announced", "inCinemas" or "released"; defaults to "released"
}

type addMovieRequest struct {
	Title               string      `json:"title"`
	Year                int         `json:"year"`
	TMDBID              int         `json:"tmdbId"`
	TitleSlug           string      `json:"titleSlug,omitempty"`
	Images              []arr.Image `json:"images,omitempty"`
	QualityProfileID    int         `json:"qualityProfileId"`
	RootFolderPath      string      `json:"rootFolderPath"`
	Monitored           bool        `json:"monitored"`
	MinimumAvailability string      `json:"minimumAvailability"`
	AddOptions          struct {
		SearchForMovie bool `json:"searchForMovie"`
	} `json:"addOptions"`
}

// AddMovie adds a lookup result to Radarr and returns the created movie.
func (c *Client) AddMovie(ctx context.Context, m Movie, opts AddOptions) (Movie, error) {
	req := addMovieRequest{
		Title:               m.Title,
		Year:                m.Year,
		TMDBID:              m.TMDBID,
		TitleSlug:           m.TitleSlug,
		Images:              m.Images,
		QualityProfileID:    opts.QualityProfileID,
		RootFolderPath:      opts.RootFolderPath,
		Monitored:           opts.Monitored,
		MinimumAvailability: opts.MinimumAvailability,
	}
	if req.MinimumAvailability == "" {
		req.MinimumAvailability = "released"
	}
	req.AddOptions.SearchForMovie = opts.SearchNow

	var created Movie
	err := c.Do(ctx, http.MethodPost, "movie", nil, req, &created)
	return created, err
}

// SearchMovie triggers an automatic search for an existing library movie.
func (c *Client) SearchMovie(ctx context.Context, movieID int) error {
	return c.Command(ctx, map[string]any{"name": "MoviesSearch", "movieIds": []int{movieID}})
}

// TMDBTerm builds a lookup term for a TMDb id.
func TMDBTerm(tmdbID int) string { return "tmdb:" + strconv.Itoa(tmdbID) }

// Queue lists Radarr's download queue, including movie info.
func (c *Client) Queue(ctx context.Context) ([]arr.QueueItem, error) {
	return c.QueueWith(ctx, url.Values{"includeMovie": {"true"}})
}

// Releases runs an interactive search for a library movie.
func (c *Client) Releases(ctx context.Context, movieID int) ([]arr.Release, error) {
	return c.Client.Releases(ctx, url.Values{"movieId": {strconv.Itoa(movieID)}})
}

// SetMonitored changes the monitored flag of a library movie.
func (c *Client) SetMonitored(ctx context.Context, movieID int, monitored bool) error {
	return c.Update(ctx, "movie", movieID, func(o map[string]json.RawMessage) error {
		arr.SetBool(o, "monitored", monitored)
		return nil
	})
}

// DeleteMovie removes a movie from the library. With deleteFiles the movie's
// files are deleted from disk too; addExclusion keeps it from coming back
// through import lists.
func (c *Client) DeleteMovie(ctx context.Context, id int, deleteFiles, addExclusion bool) error {
	q := url.Values{
		"deleteFiles":        {strconv.FormatBool(deleteFiles)},
		"addImportExclusion": {strconv.FormatBool(addExclusion)},
	}
	return c.Do(ctx, http.MethodDelete, "movie/"+strconv.Itoa(id), q, nil, nil)
}

// Calendar lists the library movies with a release date (cinemas, digital or
// physical) between start and end, both inclusive. Unmonitored movies are
// only included when asked for.
func (c *Client) Calendar(ctx context.Context, start, end time.Time, unmonitored bool) ([]Movie, error) {
	q := url.Values{
		"start":       {start.Format("2006-01-02")},
		"end":         {end.Format("2006-01-02")},
		"unmonitored": {strconv.FormatBool(unmonitored)},
	}
	var movies []Movie
	err := c.Do(ctx, http.MethodGet, "calendar", q, nil, &movies)
	return movies, err
}