package com.minamp;

import java.util.ArrayList;
import java.util.List;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;

import com.minamp.plex.Item;

/** Rows for artists / albums / tracks / playlists, with section headers and paging. */
public class ItemAdapter extends BaseAdapter {

    public static final int MODE_DEFAULT = 0, MODE_ALBUM_TRACKS = 1, MODE_QUEUE = 2;

    public interface Pager { void loadMore(int from); }

    private final Context ctx;
    private final LayoutInflater inflater;
    private final List<Item> items = new ArrayList<Item>();
    private final int mode;
    private final int artPx;
    private final int accent, text;
    private int total = -1;          // total available on the server, -1 = everything loaded
    private boolean loadingMore;
    private Pager pager;
    private String albumArtist = "";
    private int highlight = -1;      // queue index highlight
    private final App app;

    public ItemAdapter(Context c, int mode) {
        ctx = c;
        this.mode = mode;
        inflater = LayoutInflater.from(c);
        artPx = Ui.dimen(c, R.dimen.row_art);
        accent = c.getResources().getColor(R.color.accent);
        text = c.getResources().getColor(R.color.text);
        app = App.get();
    }

    public void setPager(Pager p) { pager = p; }
    public void setAlbumArtist(String a) { albumArtist = a == null ? "" : a; }
    public void setHighlight(int i) { highlight = i; notifyDataSetChanged(); }

    public void set(List<Item> list, int totalSize) {
        items.clear();
        items.addAll(list);
        total = totalSize;
        loadingMore = false;
        notifyDataSetChanged();
    }

    public void append(List<Item> list, int totalSize) {
        items.addAll(list);
        total = totalSize;
        loadingMore = false;
        notifyDataSetChanged();
    }

    public void loadFailed() { loadingMore = false; }

    public List<Item> items() { return items; }

    /** Only the tracks, and the index of position within them (for "play from here"). */
    public List<Item> tracks() {
        List<Item> t = new ArrayList<Item>();
        for (int i = 0; i < items.size(); i++) if (items.get(i).type == Item.TRACK) t.add(items.get(i));
        return t;
    }

    public int trackIndex(int position) {
        int n = 0;
        for (int i = 0; i < position && i < items.size(); i++) if (items.get(i).type == Item.TRACK) n++;
        return n;
    }

    @Override public int getCount() { return items.size(); }
    @Override public Item getItem(int i) { return items.get(i); }
    @Override public long getItemId(int i) { return i; }
    @Override public int getViewTypeCount() { return 2; }
    @Override public int getItemViewType(int i) { return items.get(i).type == Item.HEADER ? 1 : 0; }
    @Override public boolean areAllItemsEnabled() { return false; }
    @Override public boolean isEnabled(int i) { return items.get(i).type != Item.HEADER; }

    private static final class Holder {
        ImageView art; TextView num, title, sub, right;
    }

    @Override
    public View getView(int pos, View v, ViewGroup parent) {
        if (pager != null && !loadingMore && total > items.size() && pos >= items.size() - 15) {
            loadingMore = true;
            final int from = items.size();
            app.handler.post(new Runnable() { public void run() { pager.loadMore(from); } });
        }
        Item it = items.get(pos);
        if (it.type == Item.HEADER) {
            if (v == null) v = inflater.inflate(R.layout.row_header, parent, false);
            ((TextView) v).setText(it.title.toUpperCase());
            return v;
        }
        Holder h;
        if (v == null) {
            v = inflater.inflate(R.layout.row_item, parent, false);
            h = new Holder();
            h.art = (ImageView) v.findViewById(R.id.row_art);
            h.num = (TextView) v.findViewById(R.id.row_num);
            h.title = (TextView) v.findViewById(R.id.row_title);
            h.sub = (TextView) v.findViewById(R.id.row_sub);
            h.right = (TextView) v.findViewById(R.id.row_right);
            v.setTag(h);
        } else {
            h = (Holder) v.getTag();
        }

        h.title.setText(it.title);
        boolean numbered = mode == MODE_ALBUM_TRACKS && it.type == Item.TRACK;
        if (numbered) {
            h.art.setVisibility(View.GONE);
            h.art.setTag(R.id.tag_image, null);
            h.num.setVisibility(View.VISIBLE);
            h.num.setText(it.index > 0 ? String.valueOf(it.index) : "•");
            boolean showArtist = it.artist.length() > 0 && !it.artist.equals(albumArtist);
            h.sub.setVisibility(showArtist ? View.VISIBLE : View.GONE);
            h.sub.setText(it.artist);
        } else {
            h.art.setVisibility(View.VISIBLE);
            h.num.setVisibility(View.GONE);
            app.images.load(h.art, it.thumb, artPx, R.drawable.art_placeholder);
            String sub = it.subtitle();
            h.sub.setVisibility(sub.length() > 0 ? View.VISIBLE : View.GONE);
            h.sub.setText(sub);
        }

        String right = "";
        if (it.type == Item.TRACK && it.duration > 0) right = Ui.time(it.duration);
        h.right.setText(right);

        boolean current;
        if (mode == MODE_QUEUE) current = pos == highlight;
        else {
            Item playing = PlayQueue.get().current();
            current = playing != null && it.type == Item.TRACK && playing.ratingKey.equals(it.ratingKey);
        }
        h.title.setTextColor(current ? accent : text);
        return v;
    }
}