namespace PS.IPAM.Cmdlets;

using System;
using System.Collections.Generic;
using System.Management.Automation;
using PS.IPAM.Helpers;

/// <summary>
/// Creates a new subnet in phpIPAM.
/// </summary>
[Cmdlet(VerbsCommon.New, "Subnet")]
[OutputType(typeof(Subnetwork))]
public class NewSubnetCmdlet : BaseCmdlet
{
    [Parameter(
        Mandatory = true,
        ValueFromPipeline = true,
        ValueFromPipelineByPropertyName = true,
        Position = 0,
        HelpMessage = "The subnet in CIDR notation (e.g., 192.168.1.0/24).")]
    [ValidatePattern(@"^\d+\.\d+\.\d+\.\d+/\d{1,2}$")]
    [ValidateNotNullOrEmpty]
    public string CIDR { get; set; } = string.Empty;

    [Parameter(
        Mandatory = true,
        ValueFromPipeline = true,
        ValueFromPipelineByPropertyName = true,
        Position = 1,
        HelpMessage = "The section ID to create the subnet in.")]
    [ValidateNotNullOrEmpty]
    public int SectionId { get; set; }

    [Parameter(Mandatory = false, Position = 2, HelpMessage = "Description for the subnet.")]
    public string? Description { get; set; }

    [Parameter(Mandatory = false, Position = 3, HelpMessage = "VLAN ID to associate.")]
    public int? VlanId { get; set; }

    [Parameter(Mandatory = false, Position = 4, HelpMessage = "VRF ID to associate.")]
    public int? VrfId { get; set; }

    [Parameter(Mandatory = false, Position = 5, HelpMessage = "Master subnet ID for hierarchy.")]
    public int? MasterSubnetId { get; set; }

    [Parameter(Mandatory = false, Position = 6, HelpMessage = "Nameserver ID.")]
    public int? NameserverId { get; set; }

    [Parameter(Mandatory = false, Position = 7, HelpMessage = "Show subnet name.")]
    public SwitchParameter ShowName { get; set; }

    [Parameter(Mandatory = false, Position = 8, HelpMessage = "Enable recursive DNS.")]
    public SwitchParameter DNSRecursive { get; set; }

    [Parameter(Mandatory = false, Position = 9, HelpMessage = "Enable DNS records.")]
    public SwitchParameter DNSRecords { get; set; }

    [Parameter(Mandatory = false, Position = 10, HelpMessage = "Allow IP requests.")]
    public SwitchParameter AllowRequests { get; set; }

    [Parameter(Mandatory = false, Position = 11, HelpMessage = "Scan agent ID.")]
    public int? ScanAgentId { get; set; }

    [Parameter(Mandatory = false, Position = 12, HelpMessage = "Enable subnet discovery.")]
    public SwitchParameter DiscoverSubnet { get; set; }

    [Parameter(Mandatory = false, Position = 13, HelpMessage = "Mark subnet as full.")]
    public SwitchParameter IsFull { get; set; }

    [Parameter(Mandatory = false, Position = 14, HelpMessage = "Tag ID for the subnet.")]
    public int? TagId { get; set; }

    [Parameter(Mandatory = false, Position = 15, HelpMessage = "Usage threshold percentage (1-100).")]
    [ValidateRange(1, 100)]
    public int? Threshold { get; set; }

    [Parameter(Mandatory = false, Position = 16, HelpMessage = "Location ID.")]
    public int? LocationId { get; set; }

    [Parameter(Mandatory = false, HelpMessage = "Custom fields as a hashtable or PSObject.")]
    public object? CustomFields { get; set; }

    protected override void ProcessRecord()
    {
        try
        {
            var body = BuildRequestBody();

            var result = RequestHelper.InvokeRequest(
                "POST", ApiController.Subnets, null, null, body
            ).GetAwaiter().GetResult();

            if (result != null)
            {
                // Get the created subnet
                var subnet = RequestHelper.InvokeRequest(
                    "GET", ApiController.Subnets, ModelType.Subnetwork, null, null,
                    new[] { "cidr", CIDR }
                ).GetAwaiter().GetResult();

                WriteResult(subnet);
            }
        }
        catch (Exception ex)
        {
            WriteError(new ErrorRecord(ex, "NewSubnetError", ErrorCategory.InvalidOperation, null));
        }
    }

    private Dictionary<string, object> BuildRequestBody()
    {
        var parts = CIDR.Split('/');
        var body = new Dictionary<string, object>
        {
            ["subnet"] = parts[0],
            ["mask"] = parts[1],
            ["sectionId"] = SectionId
        };

        if (!string.IsNullOrEmpty(Description)) body["description"] = Description;
        if (VlanId.HasValue) body["vlanId"] = VlanId.Value;
        if (VrfId.HasValue) body["vrfId"] = VrfId.Value;
        if (MasterSubnetId.HasValue) body["masterSubnetId"] = MasterSubnetId.Value;
        if (NameserverId.HasValue) body["nameserverId"] = NameserverId.Value;
        if (ShowName.IsPresent) body["showName"] = "1";
        if (DNSRecursive.IsPresent) body["DNSrecursive"] = "1";
        if (DNSRecords.IsPresent) body["DNSrecords"] = "1";
        if (AllowRequests.IsPresent) body["allowRequests"] = "1";
        if (ScanAgentId.HasValue) body["scanAgent"] = ScanAgentId.Value;
        if (DiscoverSubnet.IsPresent) body["discoverSubnet"] = "1";
        if (IsFull.IsPresent) body["isFull"] = "1";
        if (TagId.HasValue) body["state"] = TagId.Value;
        if (Threshold.HasValue) body["threshold"] = Threshold.Value;
        if (LocationId.HasValue) body["location"] = LocationId.Value;

        foreach (var kvp in ConvertCustomFields(CustomFields))
        {
            body[kvp.Key] = kvp.Value;
        }

        return body;
    }
}