/*
* Copyright 2007 ZXing authors
*
* 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.
*/

using System;

namespace ZXing.QrCode.Internal
{
    /// <summary>
    /// <p>See ISO 18004:2006, 6.5.1. This enum encapsulates the four error correction levels
    /// defined by the QR code standard.</p>
    /// </summary>
    /// <author>Sean Owen</author>
    public sealed class ErrorCorrectionLevel
    {
        /// <summary> L = ~7% correction</summary>
        public static readonly ErrorCorrectionLevel L = new ErrorCorrectionLevel(0, 0x01, "L");
        /// <summary> M = ~15% correction</summary>
        public static readonly ErrorCorrectionLevel M = new ErrorCorrectionLevel(1, 0x00, "M");
        /// <summary> Q = ~25% correction</summary>
        public static readonly ErrorCorrectionLevel Q = new ErrorCorrectionLevel(2, 0x03, "Q");
        /// <summary> H = ~30% correction</summary>
        public static readonly ErrorCorrectionLevel H = new ErrorCorrectionLevel(3, 0x02, "H");

        private static readonly ErrorCorrectionLevel[] FOR_BITS = new[] { M, L, H, Q };

        private readonly int bits;

        private ErrorCorrectionLevel(int ordinal, int bits, String name)
        {
            this.ordinal_Renamed_Field = ordinal;
            this.bits = bits;
            this.name = name;
        }

        /// <summary>
        /// Gets the bits.
        /// </summary>
        public int Bits
        {
            get
            {
                return bits;
            }
        }

        /// <summary>
        /// Gets the name.
        /// </summary>
        public String Name
        {
            get
            {
                return name;
            }
        }

        private readonly int ordinal_Renamed_Field;
        private readonly String name;

        /// <summary>
        /// Ordinals this instance.
        /// </summary>
        /// <returns></returns>
        public int ordinal()
        {
            return ordinal_Renamed_Field;
        }

        /// <summary>
        /// Returns a <see cref="System.String"/> that represents this instance.
        /// </summary>
        /// <returns>
        /// A <see cref="System.String"/> that represents this instance.
        /// </returns>
        public override String ToString()
        {
            return name;
        }

        /// <summary>
        /// Fors the bits.
        /// </summary>
        /// <param name="bits">int containing the two bits encoding a QR Code's error correction level</param>
        /// <returns>
        ///   <see cref="ErrorCorrectionLevel"/> representing the encoded error correction level
        /// </returns>
        public static ErrorCorrectionLevel forBits(int bits)
        {
            if (bits < 0 || bits >= FOR_BITS.Length)
            {
                throw new ArgumentException();
            }
            return FOR_BITS[bits];
        }
    }
}