using System;
using System.Collections.Generic;
using System.IO;
using Microsoft.Extensions.Configuration;
using Newtonsoft.Json;

namespace StandardScene.Fass2Simulator
{
    public static class Fass2SimBootstrap
    {
        public static string SettingsFile { get; private set; } = "appsettings.json";

        public static void ApplyCommandLine(string[] args)
        {
            if (args == null)
            {
                return;
            }

            for (var i = 0; i < args.Length - 1; i++)
            {
                if (string.Equals(args[i], "--config", StringComparison.OrdinalIgnoreCase))
                {
                    SettingsFile = args[i + 1];
                }
            }
        }

        public static Fass2SimConfig LoadConfig(string settingsFile = null)
        {
            var basePath = AppContext.BaseDirectory;
            var builder = new ConfigurationBuilder()
                .SetBasePath(basePath)
                .AddJsonFile(settingsFile ?? SettingsFile, optional: true, reloadOnChange: false);

            var configuration = builder.Build();
            var config = new Fass2SimConfig();
            configuration.GetSection("Fass2Simulator").Bind(config);
            return config;
        }

        public static Fass2SimNodeProfileStore LoadNodeProfiles(Fass2SimConfig config)
        {
            var store = new Fass2SimNodeProfileStore();
            var path = ResolveNodeProfilesPath(config.NodeProfilesPath);
            if (!File.Exists(path))
            {
                return store;
            }

            try
            {
                var json = File.ReadAllText(path);
                var profiles = JsonConvert.DeserializeObject<Dictionary<string, Fass2SimNodeProfile>>(json)
                    ?? new Dictionary<string, Fass2SimNodeProfile>();
                store.Load(profiles);
                Fass2SimLog.WriteLine($"[{DateTime.Now:HH:mm:ss}] 已加载节点配置: {path} ({profiles.Count} 项)");
            }
            catch (Exception ex)
            {
                Fass2SimLog.WriteLine($"[{DateTime.Now:HH:mm:ss}] 加载节点配置失败: {ex.Message}");
            }

            return store;
        }

        public static Fass2SimRuntime CreateRuntime(Fass2SimConfig config)
        {
            var profiles = LoadNodeProfiles(config);
            return new Fass2SimRuntime(config, profiles);
        }

        public static (Fass2SimVehicle vehicle, Fass2SimMotionEngine motion, Fass2SimActionEngine actions) CreateTestStack(
            Fass2SimConfig config)
        {
            var vehicle = new Fass2SimVehicle(config);
            var actions = new Fass2SimActionEngine(vehicle, config, new Fass2SimNodeProfileStore());
            var motion = new Fass2SimMotionEngine(vehicle, config, actions);
            actions.StationActionsCompleted += motion.OnStationActionsCompleted;
            return (vehicle, motion, actions);
        }

        private static string ResolveNodeProfilesPath(string configuredPath)
        {
            if (string.IsNullOrWhiteSpace(configuredPath))
            {
                return Path.Combine(AppContext.BaseDirectory, "sim-nodes.json");
            }

            return Path.IsPathRooted(configuredPath)
                ? configuredPath
                : Path.Combine(AppContext.BaseDirectory, configuredPath);
        }
    }
}