/*
 * Copyright 2021 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 androidx.appsearch.localstorage.stats;

import androidx.annotation.NonNull;
import androidx.annotation.RestrictTo;
import androidx.appsearch.annotation.CanIgnoreReturnValue;
import androidx.appsearch.app.AppSearchResult;
import androidx.core.util.Preconditions;

/**
 * Class holds detailed stats for Optimize.
 *
 * @exportToFramework:hide
 */
@RestrictTo(RestrictTo.Scope.LIBRARY_GROUP)
public final class OptimizeStats {
    /**
     * The status code returned by {@link AppSearchResult#getResultCode()} for the call or
     * internal state.
     */
    @AppSearchResult.ResultCode
    private final int mStatusCode;
    private final int mTotalLatencyMillis;
    private final int mNativeLatencyMillis;

    // Time used to optimize the document store in millis.
    private final int mNativeDocumentStoreOptimizeLatencyMillis;

    // Time used to restore the index in millis.
    private final int mNativeIndexRestorationLatencyMillis;

    // Number of documents before the optimization.
    private final int mNativeOriginalDocumentCount;

    // Number of documents deleted during the optimization.
    private final int mNativeDeletedDocumentCount;

    // Number of documents expired during the optimization.
    private final int mNativeExpiredDocumentCount;

    // Size of storage in bytes before the optimization.
    private final long mNativeStorageSizeBeforeBytes;

    // Size of storage in bytes after the optimization.
    private final long mNativeStorageSizeAfterBytes;

    // The amount of time in millis since the last optimization ran calculated using wall clock time
    private final long mNativeTimeSinceLastOptimizeMillis;

    OptimizeStats(@NonNull Builder builder) {
        Preconditions.checkNotNull(builder);
        mStatusCode = builder.mStatusCode;
        mTotalLatencyMillis = builder.mTotalLatencyMillis;
        mNativeLatencyMillis = builder.mNativeLatencyMillis;
        mNativeDocumentStoreOptimizeLatencyMillis =
                builder.mNativeDocumentStoreOptimizeLatencyMillis;
        mNativeIndexRestorationLatencyMillis = builder.mNativeIndexRestorationLatencyMillis;
        mNativeOriginalDocumentCount = builder.mNativeOriginalDocumentCount;
        mNativeDeletedDocumentCount = builder.mNativeDeletedDocumentCount;
        mNativeExpiredDocumentCount = builder.mNativeExpiredDocumentCount;
        mNativeStorageSizeBeforeBytes = builder.mNativeStorageSizeBeforeBytes;
        mNativeStorageSizeAfterBytes = builder.mNativeStorageSizeAfterBytes;
        mNativeTimeSinceLastOptimizeMillis = builder.mNativeTimeSinceLastOptimizeMillis;
    }

    /** Returns status code for this optimization. */
    @AppSearchResult.ResultCode
    public int getStatusCode() {
        return mStatusCode;
    }

    /** Returns total latency of this optimization in millis. */
    public int getTotalLatencyMillis() {
        return mTotalLatencyMillis;
    }

    /** Returns how much time in millis spent in the native code. */
    public int getNativeLatencyMillis() {
        return mNativeLatencyMillis;
    }

    /** Returns time used to optimize the document store in millis. */
    public int getDocumentStoreOptimizeLatencyMillis() {
        return mNativeDocumentStoreOptimizeLatencyMillis;
    }

    /** Returns time used to restore the index in millis. */
    public int getIndexRestorationLatencyMillis() {
        return mNativeIndexRestorationLatencyMillis;
    }

    /** Returns number of documents before the optimization. */
    public int getOriginalDocumentCount() {
        return mNativeOriginalDocumentCount;
    }

    /** Returns number of documents deleted during the optimization. */
    public int getDeletedDocumentCount() {
        return mNativeDeletedDocumentCount;
    }

    /** Returns number of documents expired during the optimization. */
    public int getExpiredDocumentCount() {
        return mNativeExpiredDocumentCount;
    }

    /** Returns size of storage in bytes before the optimization. */
    public long getStorageSizeBeforeBytes() {
        return mNativeStorageSizeBeforeBytes;
    }

    /** Returns size of storage in bytes after the optimization. */
    public long getStorageSizeAfterBytes() {
        return mNativeStorageSizeAfterBytes;
    }

    /**
     * Returns the amount of time in millis since the last optimization ran calculated using wall
     * clock time.
     */
    public long getTimeSinceLastOptimizeMillis() {
        return mNativeTimeSinceLastOptimizeMillis;
    }

    /** Builder for {@link RemoveStats}. */
    public static class Builder {
        /**
         * The status code returned by {@link AppSearchResult#getResultCode()} for the call or
         * internal state.
         */
        @AppSearchResult.ResultCode
        int mStatusCode;
        int mTotalLatencyMillis;
        int mNativeLatencyMillis;
        int mNativeDocumentStoreOptimizeLatencyMillis;
        int mNativeIndexRestorationLatencyMillis;
        int mNativeOriginalDocumentCount;
        int mNativeDeletedDocumentCount;
        int mNativeExpiredDocumentCount;
        long mNativeStorageSizeBeforeBytes;
        long mNativeStorageSizeAfterBytes;
        long mNativeTimeSinceLastOptimizeMillis;

        /** Sets the status code. */
        @CanIgnoreReturnValue
        @NonNull
        public Builder setStatusCode(@AppSearchResult.ResultCode int statusCode) {
            mStatusCode = statusCode;
            return this;
        }

        /** Sets total latency in millis. */
        @CanIgnoreReturnValue
        @NonNull
        public Builder setTotalLatencyMillis(int totalLatencyMillis) {
            mTotalLatencyMillis = totalLatencyMillis;
            return this;
        }

        /** Sets native latency in millis. */
        @CanIgnoreReturnValue
        @NonNull
        public Builder setNativeLatencyMillis(int nativeLatencyMillis) {
            mNativeLatencyMillis = nativeLatencyMillis;
            return this;
        }

        /** Sets time used to optimize the document store. */
        @CanIgnoreReturnValue
        @NonNull
        public Builder setDocumentStoreOptimizeLatencyMillis(
                int documentStoreOptimizeLatencyMillis) {
            mNativeDocumentStoreOptimizeLatencyMillis = documentStoreOptimizeLatencyMillis;
            return this;
        }

        /** Sets time used to restore the index. */
        @CanIgnoreReturnValue
        @NonNull
        public Builder setIndexRestorationLatencyMillis(int indexRestorationLatencyMillis) {
            mNativeIndexRestorationLatencyMillis = indexRestorationLatencyMillis;
            return this;
        }

        /** Sets number of documents before the optimization. */
        @CanIgnoreReturnValue
        @NonNull
        public Builder setOriginalDocumentCount(int originalDocumentCount) {
            mNativeOriginalDocumentCount = originalDocumentCount;
            return this;
        }

        /** Sets number of documents deleted during the optimization. */
        @CanIgnoreReturnValue
        @NonNull
        public Builder setDeletedDocumentCount(int deletedDocumentCount) {
            mNativeDeletedDocumentCount = deletedDocumentCount;
            return this;
        }

        /** Sets number of documents expired during the optimization. */
        @CanIgnoreReturnValue
        @NonNull
        public Builder setExpiredDocumentCount(int expiredDocumentCount) {
            mNativeExpiredDocumentCount = expiredDocumentCount;
            return this;
        }

        /** Sets Storage size in bytes before optimization. */
        @CanIgnoreReturnValue
        @NonNull
        public Builder setStorageSizeBeforeBytes(long storageSizeBeforeBytes) {
            mNativeStorageSizeBeforeBytes = storageSizeBeforeBytes;
            return this;
        }

        /** Sets storage size in bytes after optimization. */
        @CanIgnoreReturnValue
        @NonNull
        public Builder setStorageSizeAfterBytes(long storageSizeAfterBytes) {
            mNativeStorageSizeAfterBytes = storageSizeAfterBytes;
            return this;
        }

        /**
         * Sets the amount the time since the last optimize ran calculated using wall clock time.
         */
        @CanIgnoreReturnValue
        @NonNull
        public Builder setTimeSinceLastOptimizeMillis(long timeSinceLastOptimizeMillis) {
            mNativeTimeSinceLastOptimizeMillis = timeSinceLastOptimizeMillis;
            return this;
        }

        /** Creates a {@link OptimizeStats}. */
        @NonNull
        public OptimizeStats build() {
            return new OptimizeStats(/* builder= */ this);
        }
    }
}