/*
 * Copyright (C) 2017 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.android.tv.twopanelsettings.slices.compat;

import static android.app.slice.Slice.HINT_ACTIONS;
import static android.app.slice.Slice.HINT_ERROR;
import static android.app.slice.Slice.HINT_HORIZONTAL;
import static android.app.slice.Slice.HINT_KEYWORDS;
import static android.app.slice.Slice.HINT_LARGE;
import static android.app.slice.Slice.HINT_LAST_UPDATED;
import static android.app.slice.Slice.HINT_LIST;
import static android.app.slice.Slice.HINT_LIST_ITEM;
import static android.app.slice.Slice.HINT_NO_TINT;
import static android.app.slice.Slice.HINT_PARTIAL;
import static android.app.slice.Slice.HINT_PERMISSION_REQUEST;
import static android.app.slice.Slice.HINT_SEE_MORE;
import static android.app.slice.Slice.HINT_SELECTED;
import static android.app.slice.Slice.HINT_SHORTCUT;
import static android.app.slice.Slice.HINT_SUMMARY;
import static android.app.slice.Slice.HINT_TITLE;
import static android.app.slice.Slice.HINT_TTL;
import static android.app.slice.SliceItem.FORMAT_ACTION;
import static android.app.slice.SliceItem.FORMAT_IMAGE;
import static android.app.slice.SliceItem.FORMAT_INT;
import static android.app.slice.SliceItem.FORMAT_LONG;
import static android.app.slice.SliceItem.FORMAT_REMOTE_INPUT;
import static android.app.slice.SliceItem.FORMAT_SLICE;
import static android.app.slice.SliceItem.FORMAT_TEXT;
import static com.android.tv.twopanelsettings.slices.compat.SliceConvert.unwrap;
import static com.android.tv.twopanelsettings.slices.compat.core.SliceHints.HINT_ACTIVITY;
import static com.android.tv.twopanelsettings.slices.compat.core.SliceHints.HINT_CACHED;
import static com.android.tv.twopanelsettings.slices.compat.core.SliceHints.HINT_END_OF_SECTION;
import static com.android.tv.twopanelsettings.slices.compat.core.SliceHints.HINT_OVERLAY;
import static com.android.tv.twopanelsettings.slices.compat.core.SliceHints.HINT_RAW;
import static com.android.tv.twopanelsettings.slices.compat.core.SliceHints.HINT_SELECTION_OPTION;
import static com.android.tv.twopanelsettings.slices.compat.core.SliceHints.HINT_SHOW_LABEL;

import android.app.RemoteInput;
import android.content.Context;
import android.graphics.drawable.Icon;
import android.net.Uri;
import android.os.Bundle;
import android.os.Parcelable;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.annotation.StringDef;
import androidx.core.graphics.drawable.IconCompat;
import androidx.core.util.Preconditions;
import com.android.tv.twopanelsettings.slices.base.SliceManager;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Set;

/**
 * A slice is a piece of app content and actions that can be surfaced outside of the app. A slice is
 * identified by a Uri and served via a {@link SliceProvider}.
 *
 * <p>Slices are constructed using {@link
 * com.android.tv.twopanelsettings.slices.compat.builders.TemplateSliceBuilder}s in a tree structure
 * that provides the OS some information about how the content should be displayed.
 *
 * <p>Slice framework has been deprecated, it will not receive any updates moving forward. If you
 * are looking for a framework that handles communication across apps, consider using {@link
 * android.app.appsearch.AppSearchManager}.
 */
// @Deprecated // Supported for TV
public final class Slice {

  /** Key to retrieve an extra added to an intent when an item in a selection is selected. */
  public static final String EXTRA_SELECTION = "android.app.slice.extra.SELECTION";

  /**
   * Subtype to tag an item as representing the progress bar mode for a {@link
   * android.app.slice.Slice#SUBTYPE_RANGE}
   */
  // @RestrictTo(Scope.LIBRARY_GROUP)
  public static final String SUBTYPE_RANGE_MODE = "range_mode";

  private static final String HINTS = "hints";
  private static final String ITEMS = "items";
  private static final String URI = "uri";
  private static final String SPEC_TYPE = "type";
  private static final String SPEC_REVISION = "revision";

  static final String[] NO_HINTS = new String[0];
  static final SliceItem[] NO_ITEMS = new SliceItem[0];

  /** */
  // @RestrictTo(Scope.LIBRARY)
  @StringDef({
    HINT_TITLE,
    HINT_LIST,
    HINT_LIST_ITEM,
    HINT_LARGE,
    HINT_ACTIONS,
    HINT_SELECTED,
    HINT_HORIZONTAL,
    HINT_NO_TINT,
    HINT_PARTIAL,
    HINT_SUMMARY,
    HINT_SEE_MORE,
    HINT_SHORTCUT,
    HINT_KEYWORDS,
    HINT_TTL,
    HINT_LAST_UPDATED,
    HINT_PERMISSION_REQUEST,
    HINT_ERROR,
    HINT_ACTIVITY,
    HINT_CACHED,
    HINT_END_OF_SECTION,
    HINT_SELECTION_OPTION,
    HINT_RAW,
    HINT_OVERLAY,
    HINT_SHOW_LABEL
  })
  @Retention(RetentionPolicy.SOURCE)
  public @interface SliceHint {}

  SliceSpec mSpec = null;

  SliceItem[] mItems = NO_ITEMS;

  @SliceHint
  String[] mHints = NO_HINTS;

  String mUri = null;

  /** */
  // @RestrictTo(Scope.LIBRARY)
  Slice(ArrayList<SliceItem> items, @SliceHint String[] hints, Uri uri, SliceSpec spec) {
    mHints = hints;
    mItems = items.toArray(new SliceItem[items.size()]);
    mUri = uri.toString();
    mSpec = spec;
  }

  /** */
  // @RestrictTo(Scope.LIBRARY)
  @SuppressWarnings("deprecation")
  public Slice(@NonNull Bundle in) {
    mHints = in.getStringArray(HINTS);
    Parcelable[] items = in.getParcelableArray(ITEMS);
    mItems = new SliceItem[items.length];
    for (int i = 0; i < mItems.length; i++) {
      if (items[i] instanceof Bundle) {
        mItems[i] = new SliceItem((Bundle) items[i]);
      }
    }
    mUri = in.getParcelable(URI).toString();
    mSpec =
        in.containsKey(SPEC_TYPE)
            ? new SliceSpec(in.getString(SPEC_TYPE), in.getInt(SPEC_REVISION))
            : null;
  }

  /** */
  // @RestrictTo(Scope.LIBRARY)
  public @NonNull Bundle toBundle() {
    Bundle b = new Bundle();
    b.putStringArray(HINTS, mHints);
    Parcelable[] p = new Parcelable[mItems.length];
    for (int i = 0; i < mItems.length; i++) {
      p[i] = mItems[i].toBundle();
    }
    b.putParcelableArray(ITEMS, p);
    b.putParcelable(URI, Uri.parse(mUri));
    if (mSpec != null) {
      b.putString(SPEC_TYPE, mSpec.getType());
      b.putInt(SPEC_REVISION, mSpec.getRevision());
    }
    return b;
  }

  /**
   * @return The spec for this slice
   */
  // @RestrictTo(RestrictTo.Scope.LIBRARY_GROUP_PREFIX)
  public @Nullable SliceSpec getSpec() {
    return mSpec;
  }

  /**
   * @return The Uri that this Slice represents.
   */
  public @NonNull Uri getUri() {
    return Uri.parse(mUri);
  }

  /**
   * @return All child {@link SliceItem}s that this Slice contains.
   */
  public @NonNull List<SliceItem> getItems() {
    return Arrays.asList(mItems);
  }

  /**
   * @return
   */
  // @RestrictTo(LIBRARY)
  public @NonNull SliceItem[] getItemArray() {
    return mItems;
  }

  /**
   * @return All hints associated with this Slice.
   */
  public @NonNull @SliceHint List<String> getHints() {
    return Arrays.asList(mHints);
  }

  /** */
  // @RestrictTo(LIBRARY)
  public @NonNull @SliceHint String[] getHintArray() {
    return mHints;
  }

  /** */
  // @RestrictTo(Scope.LIBRARY_GROUP_PREFIX)
  public boolean hasHint(@NonNull @SliceHint String hint) {
    return ArrayUtils.contains(mHints, hint);
  }

  /** A Builder used to construct {@link Slice}s */
  // @RestrictTo(Scope.LIBRARY_GROUP_PREFIX)
  public static class Builder {

    private final Uri mUri;
    private ArrayList<SliceItem> mItems = new ArrayList<>();
    private @SliceHint ArrayList<String> mHints = new ArrayList<>();
    private SliceSpec mSpec;
    private int mChildId;

    /**
     * Create a builder which will construct a {@link Slice} for the Given Uri.
     *
     * @param uri Uri to tag for this slice.
     */
    public Builder(@NonNull Uri uri) {
      mUri = uri;
    }

    /**
     * Create a builder for a {@link Slice} that is a sub-slice of the slice being constructed by
     * the provided builder.
     *
     * @param parent The builder constructing the parent slice
     */
    public Builder(@NonNull Builder parent) {
      mUri = parent.getChildUri();
    }

    private Uri getChildUri() {
      return mUri.buildUpon().appendPath("_gen").appendPath(String.valueOf(mChildId++)).build();
    }

    /** Add the spec for this slice. */
    // @RestrictTo(RestrictTo.Scope.LIBRARY_GROUP_PREFIX)
    public @NonNull Builder setSpec(@Nullable SliceSpec spec) {
      mSpec = spec;
      return this;
    }

    /** Add hints to the Slice being constructed */
    public @NonNull Builder addHints(@NonNull @SliceHint String... hints) {
      mHints.addAll(Arrays.asList(hints));
      return this;
    }

    /** Add hints to the Slice being constructed */
    public @NonNull Builder addHints(@NonNull @SliceHint List<String> hints) {
      return addHints(hints.toArray(new String[hints.size()]));
    }

    /** Add a sub-slice to the slice being constructed */
    public @NonNull Builder addSubSlice(@NonNull Slice slice) {
      Preconditions.checkNotNull(slice);
      return addSubSlice(slice, null);
    }

    /**
     * Add a sub-slice to the slice being constructed
     *
     * @param subType Optional template-specific type information
     * @see SliceItem#getSubType()
     */
    public @NonNull Builder addSubSlice(@NonNull Slice slice, @Nullable String subType) {
      Preconditions.checkNotNull(slice);
      mItems.add(new SliceItem(slice, FORMAT_SLICE, subType, slice.getHintArray()));
      return this;
    }

    /**
     * Add an action to the slice being constructed
     *
     * @param subType Optional template-specific type information
     * @see SliceItem#getSubType()
     */
    public @NonNull Builder addAction(
        @NonNull Parcelable action, @NonNull Slice s, @Nullable String subType) {
      Preconditions.checkNotNull(action);
      Preconditions.checkNotNull(s);
      @SliceHint String[] hints = s.getHintArray();
      mItems.add(new SliceItem(action, s, FORMAT_ACTION, subType, hints));
      return this;
    }

    /**
     * Add an action to the slice being constructed
     *
     * @param subType Optional template-specific type information
     * @param action Callback to be triggered when a pending intent would normally be fired.
     * @see SliceItem#getSubType()
     */
    public @NonNull Builder addAction(
        @NonNull Slice s, @Nullable String subType, @NonNull SliceItem.ActionHandler action) {
      Preconditions.checkNotNull(s);
      @SliceHint String[] hints = s.getHintArray();
      mItems.add(new SliceItem(action, s, FORMAT_ACTION, subType, hints));
      return this;
    }

    /**
     * Add text to the slice being constructed
     *
     * @param subType Optional template-specific type information
     * @see SliceItem#getSubType()
     */
    public @NonNull Builder addText(
        @Nullable CharSequence text,
        @Nullable String subType,
        @NonNull @SliceHint String... hints) {
      mItems.add(new SliceItem(text, FORMAT_TEXT, subType, hints));
      return this;
    }

    /**
     * Add text to the slice being constructed
     *
     * @param subType Optional template-specific type information
     * @see SliceItem#getSubType()
     */
    public @NonNull Builder addText(
        @Nullable CharSequence text,
        @Nullable String subType,
        @NonNull @SliceHint List<String> hints) {
      return addText(text, subType, hints.toArray(new String[hints.size()]));
    }

    /**
     * Add an image to the slice being constructed
     *
     * @param subType Optional template-specific type information
     * @see SliceItem#getSubType()
     */
    public @NonNull Builder addIcon(
        @NonNull IconCompat icon, @Nullable String subType, @NonNull @SliceHint String... hints) {
      Preconditions.checkNotNull(icon);
      if (isValidIcon(icon)) {
        mItems.add(new SliceItem(icon, FORMAT_IMAGE, subType, hints));
      }
      return this;
    }

    /**
     * Add an image to the slice being constructed
     *
     * @param subType Optional template-specific type information
     * @see SliceItem#getSubType()
     */
    public @NonNull Builder addIcon(
        @NonNull IconCompat icon,
        @Nullable String subType,
        @NonNull @SliceHint List<String> hints) {
      Preconditions.checkNotNull(icon);
      if (isValidIcon(icon)) {
        return addIcon(icon, subType, hints.toArray(new String[hints.size()]));
      }
      return this;
    }

    /**
     * Add remote input to the slice being constructed
     *
     * @param subType Optional template-specific type information
     * @see SliceItem#getSubType()
     */
    // @RestrictTo(RestrictTo.Scope.LIBRARY_GROUP_PREFIX)
    public @NonNull Builder addRemoteInput(
        @NonNull RemoteInput remoteInput,
        @Nullable String subType,
        @NonNull @SliceHint List<String> hints) {
      Preconditions.checkNotNull(remoteInput);
      return addRemoteInput(remoteInput, subType, hints.toArray(new String[hints.size()]));
    }

    /**
     * Add remote input to the slice being constructed
     *
     * @param subType Optional template-specific type information
     * @see SliceItem#getSubType()
     */
    // @RestrictTo(RestrictTo.Scope.LIBRARY_GROUP_PREFIX)
    public @NonNull Builder addRemoteInput(
        @NonNull RemoteInput remoteInput,
        @Nullable String subType,
        @NonNull @SliceHint String... hints) {
      Preconditions.checkNotNull(remoteInput);
      mItems.add(new SliceItem(remoteInput, FORMAT_REMOTE_INPUT, subType, hints));
      return this;
    }

    /**
     * Add a int to the slice being constructed
     *
     * @param subType Optional template-specific type information
     * @see SliceItem#getSubType()
     */
    public @NonNull Builder addInt(
        int value, @Nullable String subType, @NonNull @SliceHint String... hints) {
      mItems.add(new SliceItem(value, FORMAT_INT, subType, hints));
      return this;
    }

    /**
     * Add a int to the slice being constructed
     *
     * @param subType Optional template-specific type information
     * @see SliceItem#getSubType()
     */
    public @NonNull Builder addInt(
        int value, @Nullable String subType, @NonNull @SliceHint List<String> hints) {
      return addInt(value, subType, hints.toArray(new String[hints.size()]));
    }

    /**
     * Add a long to the slice being constructed
     *
     * @param subType Optional template-specific type information
     * @see SliceItem#getSubType()
     */
    public @NonNull Builder addLong(
        long time, @Nullable String subType, @NonNull @SliceHint String... hints) {
      mItems.add(new SliceItem(time, FORMAT_LONG, subType, hints));
      return this;
    }

    /**
     * Add a long to the slice being constructed
     *
     * @param subType Optional template-specific type information
     * @see SliceItem#getSubType()
     */
    public @NonNull Builder addLong(
        long time, @Nullable String subType, @NonNull @SliceHint List<String> hints) {
      return addLong(time, subType, hints.toArray(new String[hints.size()]));
    }

    /**
     * Add a timestamp to the slice being constructed
     *
     * @param subType Optional template-specific type information
     * @see SliceItem#getSubType() TO BE REMOVED
     */
    // @Deprecated // Supported for TV
    public Builder addTimestamp(long time, @Nullable String subType, @SliceHint String... hints) {
      mItems.add(new SliceItem(time, FORMAT_LONG, subType, hints));
      return this;
    }

    /**
     * Add a timestamp to the slice being constructed
     *
     * @param subType Optional template-specific type information
     * @see SliceItem#getSubType()
     */
    public @NonNull Builder addTimestamp(
        long time, @Nullable String subType, @NonNull @SliceHint List<String> hints) {
      return addTimestamp(time, subType, hints.toArray(new String[hints.size()]));
    }

    /** Add a SliceItem to the slice being constructed. */
    // @RestrictTo(Scope.LIBRARY_GROUP)
    public @NonNull Builder addItem(@NonNull SliceItem item) {
      mItems.add(item);
      return this;
    }

    /** Construct the slice. */
    public @NonNull Slice build() {
      return new Slice(mItems, mHints.toArray(new String[mHints.size()]), mUri, mSpec);
    }
  }

  /**
   * @return A string representation of this slice.
   */
  @NonNull
  @Override
  public String toString() {
    return toString("");
  }

  /**
   * @return A string representation of this slice.
   */
  @NonNull
  // @RestrictTo(Scope.LIBRARY)
  public String toString(@NonNull String indent) {
    StringBuilder sb = new StringBuilder();
    sb.append(indent);
    sb.append("Slice ");
    if (mHints.length > 0) {
      appendHints(sb, mHints);
      sb.append(' ');
    }
    sb.append('[');
    sb.append(mUri);
    sb.append("] {\n");
    final String nextIndent = indent + "  ";
    for (int i = 0; i < mItems.length; i++) {
      SliceItem item = mItems[i];
      sb.append(item.toString(nextIndent));
    }
    sb.append(indent);
    sb.append('}');
    return sb.toString();
  }

  /** */
  // @RestrictTo(Scope.LIBRARY)
  public static void appendHints(@NonNull StringBuilder sb, @Nullable String[] hints) {
    if (hints == null || hints.length == 0) {
      return;
    }

    sb.append('(');
    int end = hints.length - 1;
    for (int i = 0; i < end; i++) {
      sb.append(hints[i]);
      sb.append(", ");
    }
    sb.append(hints[end]);
    sb.append(")");
  }

  /**
   * Turns a slice Uri into slice content.
   *
   * @param context Context to be used.
   * @param uri The URI to a slice provider
   * @return The Slice provided by the app or null if none is given.
   * @see Slice
   */
  // @RestrictTo(Scope.LIBRARY_GROUP_PREFIX)
  @Nullable
  public static Slice bindSlice(
      @NonNull Context context, @NonNull Uri uri, @Nullable Set<SliceSpec> supportedSpecs) {
    return SliceViewManagerWrapper.bindSlice(
        context, SliceManager.from(context), uri, unwrap(supportedSpecs));
  }

  /** */
  // @RestrictTo(LIBRARY)
  static boolean isValidIcon(IconCompat icon) {
    if (icon == null) {
      return false;
    }
    if (icon.mType == Icon.TYPE_RESOURCE && icon.getResId() == 0) {
      throw new IllegalArgumentException(
          "Failed to add icon, invalid resource id: " + icon.getResId());
    }
    return true;
  }
}