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 * Copyright (c) 2005-2026 The OPC Foundation, Inc. All rights reserved.
 *
 * OPC Foundation MIT License 1.00
 *
 * Permission is hereby granted, free of charge, to any person
 * obtaining a copy of this software and associated documentation
 * files (the "Software"), to deal in the Software without
 * restriction, including without limitation the rights to use,
 * copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following
 * conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 *
 * The complete license agreement can be found here:
 * http://opcfoundation.org/License/MIT/1.00/
 * ======================================================================*/

using System;
using System.Globalization;
using System.Linq;

namespace Vision.VisualInspectionAgent
{
    internal sealed record VisualInspectionAgentOptions
    {
        public string ServerUrl { get; init; } = "opc.tcp://localhost:62865/VisualInspectionCell";

        public bool Insecure { get; init; }

        public VisualInspectionAgentMode Mode { get; init; } = VisualInspectionAgentMode.Scripted;

        public int Cycles { get; init; } = 3;

        public TimeSpan OperatorTimeout { get; init; } = TimeSpan.FromSeconds(10);

        public string? AIEndpoint { get; init; }

        public static VisualInspectionAgentOptions Parse(string[] args)
        {
            return new VisualInspectionAgentOptions
            {
                ServerUrl = GetOption(args, "--server") ?? "opc.tcp://localhost:62865/VisualInspectionCell",
                Insecure = HasFlag(args, "--insecure"),
                Mode = ParseMode(GetOption(args, "--mode")),
                Cycles = Math.Max(1, int.TryParse(
                    GetOption(args, "--cycles"), NumberStyles.Integer, CultureInfo.InvariantCulture, out int cycles)
                    ? cycles
                    : 3),
                OperatorTimeout = TimeSpan.FromSeconds(Math.Max(1, int.TryParse(
                    GetOption(args, "--operator-timeout"), NumberStyles.Integer, CultureInfo.InvariantCulture,
                    out int timeout)
                    ? timeout
                    : 10)),
                AIEndpoint = GetOption(args, "--ai-endpoint")
            };
        }

        private static VisualInspectionAgentMode ParseMode(string? value)
        {
            if (string.IsNullOrWhiteSpace(value))
            {
                return VisualInspectionAgentMode.Scripted;
            }

            // The documented spellings are hyphenated ("live-ai"), the enum members are not.
            // Silently defaulting an unrecognised mode would drop live-ai into the simulated
            // analyser, which is exactly the degraded run the mode exists to prevent.
            string candidate = value.Replace("-", string.Empty, StringComparison.Ordinal)
                .Replace("_", string.Empty, StringComparison.Ordinal);
            if (Enum.TryParse(candidate, ignoreCase: true, out VisualInspectionAgentMode mode) &&
                Enum.IsDefined(mode))
            {
                return mode;
            }

            throw new FormatException(
                FormattableString.Invariant(
                    $"Unknown --mode '{value}'. Expected one of: scripted, live-ai, human."));
        }

        private static string? GetOption(string[] args, string name)
        {
            for (int ii = 0; ii < args.Length - 1; ii++)
            {
                if (string.Equals(args[ii], name, StringComparison.OrdinalIgnoreCase))
                {
                    return args[ii + 1];
                }
            }
            return null;
        }

        private static bool HasFlag(string[] args, string name)
        {
            return args.Any(a => string.Equals(a, name, StringComparison.OrdinalIgnoreCase));
        }
    }

    internal enum VisualInspectionAgentMode
    {
        Scripted,

        LiveAI,

        Human
    }
}