using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.RazorPages;
using System.ComponentModel.DataAnnotations;
using WIDESEAWCS_S7Simulator.Core.Entities;
using WIDESEAWCS_S7Simulator.Core.Enums;

namespace WIDESEAWCS_S7Simulator.Web.Pages;

/// <summary>
/// 创建实例页
/// </summary>
public class CreateModel : PageModel
{
    private readonly ILogger<CreateModel> _logger;
    private readonly HttpClient _httpClient;

    public CreateModel(ILogger<CreateModel> logger, IHttpClientFactory httpClientFactory)
    {
        _logger = logger;
        _httpClient = httpClientFactory.CreateClient();
        _httpClient.BaseAddress = new Uri($"{Request.Scheme}://{Request.Host}");
    }

    [BindProperty]
    public CreateInstanceInputModel Input { get; set; } = new();

    public void OnGet()
    {
        _logger.LogInformation("Loading create instance page");
    }

    public async Task<IActionResult> OnPostAsync()
    {
        if (!ModelState.IsValid)
        {
            return Page();
        }

        try
        {
            var config = new InstanceConfig
            {
                Id = Input.Id,
                Name = Input.Name,
                PLCType = Input.PLCType,
                Port = Input.Port,
                ActivationKey = Input.ActivationKey ?? string.Empty,
                AutoStart = Input.AutoStart,
                MemoryConfig = new MemoryRegionConfig
                {
                    MRegionSize = Input.MRegionSize > 0 ? Input.MRegionSize : 1024,
                    DBBlockCount = Input.DBBlockCount > 0 ? Input.DBBlockCount : 100,
                    DBBlockSize = Input.DBBlockSize > 0 ? Input.DBBlockSize : 1024,
                    IRegionSize = Input.IRegionSize > 0 ? Input.IRegionSize : 256,
                    QRegionSize = Input.QRegionSize > 0 ? Input.QRegionSize : 256,
                    TRegionCount = Input.TRegionCount > 0 ? Input.TRegionCount : 64,
                    CRegionCount = Input.CRegionCount > 0 ? Input.CRegionCount : 64
                }
            };

            var response = await _httpClient.PostAsJsonAsync("/api/SimulatorInstances", config);

            if (response.IsSuccessStatusCode)
            {
                _logger.LogInformation("Instance {InstanceId} created successfully", Input.Id);
                TempData["SuccessMessage"] = $"实例 \"{Input.Id}\" 创建成功!";
                return RedirectToPage("/Index");
            }
            else if (response.StatusCode == System.Net.HttpStatusCode.Conflict)
            {
                ModelState.AddModelError(string.Empty, "实例ID已存在，请使用其他ID");
            }
            else
            {
                var error = await response.Content.ReadFromJsonAsync<object>();
                ModelState.AddModelError(string.Empty, error?.ToString() ?? "创建实例失败");
            }
        }
        catch (HttpRequestException ex)
        {
            _logger.LogError(ex, "Failed to create instance");
            ModelState.AddModelError(string.Empty, "网络错误，请稍后重试");
        }

        return Page();
    }

    /// <summary>
    /// 创建实例输入模型
    /// </summary>
    public class CreateInstanceInputModel
    {
        /// <summary>
        /// 实例ID
        /// </summary>
        [Required(ErrorMessage = "实例ID不能为空")]
        [StringLength(50, MinimumLength = 1, ErrorMessage = "实例ID长度必须在1-50个字符之间")]
        [RegularExpression("^[a-zA-Z0-9_-]+$", ErrorMessage = "实例ID只能包含字母、数字、下划线和连字符")]
        public string Id { get; set; } = string.Empty;

        /// <summary>
        /// 实例名称
        /// </summary>
        [Required(ErrorMessage = "实例名称不能为空")]
        [StringLength(100, ErrorMessage = "实例名称不能超过100个字符")]
        public string Name { get; set; } = string.Empty;

        /// <summary>
        /// PLC型号
        /// </summary>
        [Required(ErrorMessage = "PLC型号不能为空")]
        public SiemensPLCType PLCType { get; set; } = SiemensPLCType.S71200;

        /// <summary>
        /// 监听端口
        /// </summary>
        [Required(ErrorMessage = "端口不能为空")]
        [Range(1, 65535, ErrorMessage = "端口必须在1-65535之间")]
        public int Port { get; set; } = 102;

        /// <summary>
        /// HSL激活码
        /// </summary>
        [StringLength(200, ErrorMessage = "激活码不能超过200个字符")]
        public string? ActivationKey { get; set; }

        /// <summary>
        /// 自动启动
        /// </summary>
        public bool AutoStart { get; set; } = false;

        // 内存配置
        public int MRegionSize { get; set; }
        public int DBBlockCount { get; set; }
        public int DBBlockSize { get; set; }
        public int IRegionSize { get; set; }
        public int QRegionSize { get; set; }
        public int TRegionCount { get; set; }
        public int CRegionCount { get; set; }
    }
}