package com.miniabs;

import org.json.JSONException;
import org.json.JSONObject;

/** One podcast episode, trimmed down to what Podlite needs. */
final class Episode {
    String itemId = "";   // library item (the podcast) id
    String id = "";       // episode id
    String title = "";
    String show = "";     // podcast title
    String author = "";
    String desc = "";
    String ino = "";      // audio file inode, used for downloads
    String ext = ".mp3";
    String mime = "";
    long published;       // ms since epoch
    double duration;      // seconds
    long size;            // bytes

    /** Builds an episode from an Audiobookshelf episode object. Returns null if it has no audio. */
    static Episode fromApi(JSONObject e, String itemId, String show, String author) {
        if (e == null) return null;
        Episode ep = new Episode();
        ep.id = Util.str(e, "id");
        ep.itemId = itemId != null && itemId.length() > 0 ? itemId : Util.str(e, "libraryItemId");
        ep.title = Util.str(e, "title");
        ep.show = show == null ? "" : show;
        ep.author = author == null ? "" : author;
        ep.desc = Util.str(e, "description");
        if (ep.desc.length() == 0) ep.desc = Util.str(e, "subtitle");
        ep.published = e.optLong("publishedAt", 0);
        JSONObject af = e.optJSONObject("audioFile");
        if (af != null) {
            ep.duration = af.optDouble("duration", 0);
            ep.ino = Util.str(af, "ino");
            ep.mime = Util.str(af, "mimeType");
            JSONObject meta = af.optJSONObject("metadata");
            if (meta != null) {
                String x = Util.str(meta, "ext");
                if (x.length() > 0) ep.ext = x;
                ep.size = meta.optLong("size", 0);
            }
        }
        if (ep.duration <= 0) ep.duration = e.optDouble("duration", 0);
        if (ep.id.length() == 0 || ep.itemId.length() == 0 || af == null) return null;
        ep.ext = safeExt(ep.ext);
        // The podcast object (when the API sends it) carries the show name
        JSONObject pod = e.optJSONObject("podcast");
        if (pod != null && ep.show.length() == 0) {
            JSONObject md = pod.optJSONObject("metadata");
            if (md != null) {
                ep.show = Util.str(md, "title");
                ep.author = Util.str(md, "author");
            }
        }
        return ep;
    }

    private static String safeExt(String x) {
        x = x.toLowerCase();
        if (!x.startsWith(".")) x = "." + x;
        if (!x.matches("\\.[a-z0-9]{1,5}")) x = ".mp3";
        return x;
    }

    JSONObject toJson() {
        JSONObject o = new JSONObject();
        try {
            o.put("itemId", itemId).put("id", id).put("title", title).put("show", show)
                    .put("author", author).put("desc", desc).put("ino", ino).put("ext", ext)
                    .put("mime", mime).put("published", published).put("duration", duration)
                    .put("size", size);
        } catch (JSONException ignored) {
        }
        return o;
    }

    static Episode fromStored(JSONObject o) {
        Episode e = new Episode();
        e.itemId = Util.str(o, "itemId");
        e.id = Util.str(o, "id");
        e.title = Util.str(o, "title");
        e.show = Util.str(o, "show");
        e.author = Util.str(o, "author");
        e.desc = Util.str(o, "desc");
        e.ino = Util.str(o, "ino");
        e.ext = safeExt(o.optString("ext", ".mp3"));
        e.mime = Util.str(o, "mime");
        e.published = o.optLong("published", 0);
        e.duration = o.optDouble("duration", 0);
        e.size = o.optLong("size", 0);
        return e;
    }
}