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

import (
	"context"
	"net/http"
	"net/url"
	"strconv"

	"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"`
}

// 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
}

// 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 {
	body := map[string]any{"name": "MoviesSearch", "movieIds": []int{movieID}}
	return c.Do(ctx, http.MethodPost, "command", nil, body, nil)
}

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