namespace PS.IPAM.Cmdlets;

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

/// <summary>
/// Creates a new address using the first available IP in a subnet.
/// </summary>
[Cmdlet(VerbsCommon.New, "FirstFreeIP")]
[OutputType(typeof(Address))]
public class NewFirstFreeIPCmdlet : BaseCmdlet
{
    [Parameter(
        Mandatory = true,
        ValueFromPipeline = true,
        ValueFromPipelineByPropertyName = true,
        Position = 0,
        HelpMessage = "The subnet ID to create the address in.")]
    [ValidateNotNullOrEmpty]
    public string SubnetId { get; set; } = string.Empty;

    [Parameter(Mandatory = false, Position = 1, HelpMessage = "Mark this address as a gateway.")]
    public SwitchParameter Gateway { get; set; }

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

    [Parameter(Mandatory = false, Position = 3, HelpMessage = "Hostname for the address.")]
    public string? Hostname { get; set; }

    [Parameter(Mandatory = false, Position = 4, HelpMessage = "MAC address.")]
    public string? MAC { get; set; }

    [Parameter(Mandatory = false, Position = 5, HelpMessage = "Owner of the address.")]
    public string? Owner { get; set; }

    [Parameter(Mandatory = false, Position = 6, HelpMessage = "Tag ID for the address.")]
    public string? TagId { get; set; }

    [Parameter(Mandatory = false, Position = 7, HelpMessage = "Ignore PTR record generation.")]
    public SwitchParameter PTRIgnore { get; set; }

    [Parameter(Mandatory = false, Position = 8, HelpMessage = "PTR record ID.")]
    public string? PTRId { get; set; }

    [Parameter(Mandatory = false, Position = 9, HelpMessage = "Note for the address.")]
    public string? Note { get; set; }

    [Parameter(Mandatory = false, Position = 10, HelpMessage = "Exclude from ping scanning.")]
    public SwitchParameter ExcludePing { get; set; }

    [Parameter(Mandatory = false, Position = 11, HelpMessage = "Associated device ID.")]
    public string? DeviceId { get; set; }

    [Parameter(Mandatory = false, Position = 12, HelpMessage = "Port information.")]
    public string? Port { get; set; }

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

    protected override void ProcessRecord()
    {
        try
        {
            var identifiers = new[] { "first_free" };
            var body = BuildRequestBody();

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

            if (result != null)
            {
                var ip = result.ToString();
                var address = RequestHelper.InvokeRequest(
                    "GET", ApiController.Addresses, ModelType.Address, null, null,
                    new[] { "search", ip! }
                ).GetAwaiter().GetResult();

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

    private Dictionary<string, object> BuildRequestBody()
    {
        var body = new Dictionary<string, object>
        {
            ["subnetId"] = SubnetId
        };

        if (Gateway.IsPresent) body["is_gateway"] = "1";
        if (!string.IsNullOrEmpty(Description)) body["description"] = Description;
        if (!string.IsNullOrEmpty(Hostname)) body["hostname"] = Hostname;
        if (!string.IsNullOrEmpty(MAC)) body["mac"] = MAC;
        if (!string.IsNullOrEmpty(Owner)) body["owner"] = Owner;
        if (!string.IsNullOrEmpty(TagId)) body["tag"] = TagId;
        if (PTRIgnore.IsPresent) body["PTRignore"] = "1";
        if (!string.IsNullOrEmpty(PTRId)) body["PTR"] = PTRId;
        if (!string.IsNullOrEmpty(Note)) body["note"] = Note;
        if (ExcludePing.IsPresent) body["excludePing"] = "1";
        if (!string.IsNullOrEmpty(DeviceId)) body["deviceId"] = DeviceId;
        if (!string.IsNullOrEmpty(Port)) body["port"] = Port;

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

        return body;
    }
}