using System;
using System.Collections.Generic;
using System.Text.Json;
using System.Threading.Tasks;
using Sandbox;
using Editor;

/// <summary>
/// Setup window for entering Network Storage credentials.
/// Uses Paint for layout/chrome but real LineEdit widgets for text inputs,
/// giving native text selection, copy/paste, drag, and unlimited key length.
///
/// Access via Editor menu → Network Storage → Setup, or the Setup button in the Sync Tool.
/// </summary>
[Dock( "Editor", "Network Storage Setup", "key" )]
public class SetupWindow : DockWindow
{
	// ── Real input widgets (native text selection, copy/paste, any length) ──
	private LineEdit _projectIdInput;
	private LineEdit _publicKeyInput;
	private LineEdit _secretKeyInput;
	private LineEdit _baseUrlInput;
	private LineEdit _cdnUrlInput;
	private LineEdit _dataFolderInput;

	// ── UI state ──
	private string _status = "";
	private string _statusColor = "white";
	private bool _secretKeyMasked = true;
	private List<ButtonRect> _buttons = new();
	private Vector2 _mousePos;

	// ── Test results ──
	private string _testProjectId;
	private string _testSecretKey;
	private string _testPublicKey;
	private string _testProjectTitle;
	private string _testPermissions;

	private struct ButtonRect
	{
		public Rect Rect;
		public string Id;
		public Action OnClick;
	}

	public SetupWindow()
	{
		Title = "Network Storage Setup";
		Size = new Vector2( 520, 720 );
		MinimumSize = new Vector2( 400, 580 );

		SyncToolConfig.Load();
		CreateInputWidgets();
	}

	[Menu( "Editor", "Network Storage/Setup" )]
	public static void OpenWindow()
	{
		var window = new SetupWindow();
		window.Show();
	}

	// ──────────────────────────────────────────────────────
	//  Create real LineEdit widgets (children of the window)
	// ──────────────────────────────────────────────────────

	private void CreateInputWidgets()
	{
		_projectIdInput = CreateLineEdit( SyncToolConfig.ProjectId, "From sbox.cool dashboard" );
		_publicKeyInput = CreateLineEdit( SyncToolConfig.PublicApiKey, "Public key — used by game client" );
		_secretKeyInput = CreateLineEdit( SyncToolConfig.SecretKey, "Secret key — editor only, NEVER ships" );
		_baseUrlInput = CreateLineEdit( SyncToolConfig.BaseUrl, "Default: https://api.sboxcool.com" );
		_cdnUrlInput = CreateLineEdit( SyncToolConfig.CdnUrl, "Optional: storage.sboxcool.com" );
		_dataFolderInput = CreateLineEdit( SyncToolConfig.DataFolder, "Subfolder under Editor/ (default: Network Storage)" );
	}

	private LineEdit CreateLineEdit( string value, string placeholder )
	{
		var input = new LineEdit( this );
		input.Text = value ?? "";
		input.PlaceholderText = placeholder;
		input.Visible = true;
		return input;
	}

	/// <summary>
	/// Position a LineEdit at the given rect. Called during OnPaint so they track layout.
	/// </summary>
	private void PositionInput( LineEdit input, float x, float y, float w, float h )
	{
		input.Position = new Vector2( x, y );
		input.Size = new Vector2( w, h );
	}

	// ──────────────────────────────────────────────────────
	//  Rendering (Paint for chrome, real widgets for inputs)
	// ──────────────────────────────────────────────────────

	protected override void OnPaint()
	{
		base.OnPaint();
		_buttons.Clear();

		var y = 38f;
		var pad = 20f;
		var w = Width - pad * 2;
		var fieldH = 28f;

		// ── Title ──
		Paint.SetDefaultFont( size: 14, weight: 700 );
		Paint.SetPen( Color.White );
		Paint.DrawText( new Rect( pad, y, w, 24 ), "Network Storage Setup", TextFlag.LeftCenter );
		y += 32;

		// ── Description ──
		Paint.SetDefaultFont( size: 9 );
		Paint.SetPen( Color.White.WithAlpha( 0.5f ) );
		Paint.DrawText( new Rect( pad, y, w, 14 ), "Credentials are stored in Editor/ config files (gitignored, never published)", TextFlag.LeftCenter );
		y += 22;

		DrawSeparator( ref y, w, pad );

		// ── Input fields (label + real LineEdit widget) ──
		DrawFieldLabel( ref y, pad, w, "Project ID" );
		PositionInput( _projectIdInput, pad, y, w, fieldH );
		y += fieldH + 6;

		DrawFieldLabel( ref y, pad, w, "Public API Key" );
		PositionInput( _publicKeyInput, pad, y, w, fieldH );
		y += fieldH + 2;

		// Public key prefix hint
		var pubKey = _publicKeyInput.Text?.Trim() ?? "";
		if ( !string.IsNullOrEmpty( pubKey ) && !pubKey.StartsWith( "sbox_ns_" ) )
		{
			Paint.SetDefaultFont( size: 8 );
			Paint.SetPen( Color.Orange.WithAlpha( 0.7f ) );
			Paint.DrawText( new Rect( pad, y, w, 12 ), "Standard public keys start with sbox_ns_", TextFlag.LeftCenter );
			y += 14;
		}
		y += 4;

		// Secret Key — with show/hide toggle
		var toggleW = 48f;
		var toggleGap = 6f;
		var fieldInputW = w - toggleW - toggleGap;

		// Label
		DrawFieldLabel( ref y, pad, w, "Secret Key" );

		if ( _secretKeyMasked )
		{
			// Hide the real input, draw a masked box with dots
			_secretKeyInput.Visible = false;

			var maskedRect = new Rect( pad, y, fieldInputW, fieldH );
			var maskedHovered = maskedRect.IsInside( _mousePos );

			Paint.SetBrush( Color.White.WithAlpha( maskedHovered ? 0.08f : 0.04f ) );
			Paint.SetPen( Color.White.WithAlpha( maskedHovered ? 0.2f : 0.1f ) );
			Paint.DrawRect( maskedRect, 3 );

			Paint.SetDefaultFont( size: 12 );
			var secText = _secretKeyInput.Text?.Trim() ?? "";
			if ( string.IsNullOrEmpty( secText ) )
			{
				Paint.SetPen( Color.White.WithAlpha( 0.25f ) );
				Paint.SetDefaultFont( size: 10 );
				Paint.DrawText( new Rect( pad + 8, y, fieldInputW - 16, fieldH ), "Secret key — editor only, NEVER ships", TextFlag.LeftCenter );
			}
			else
			{
				Paint.SetPen( Color.White.WithAlpha( 0.6f ) );
				var dots = new string( '\u2022', Math.Min( secText.Length, 40 ) );
				Paint.DrawText( new Rect( pad + 8, y, fieldInputW - 16, fieldH ), dots, TextFlag.LeftCenter );
			}
		}
		else
		{
			// Show the real input
			_secretKeyInput.Visible = true;
			PositionInput( _secretKeyInput, pad, y, fieldInputW, fieldH );
		}

		// Show/Hide toggle button
		var toggleRect = new Rect( pad + fieldInputW + toggleGap, y, toggleW, fieldH );
		var toggleHovered = toggleRect.IsInside( _mousePos );
		var toggleColor = Color.Cyan;

		Paint.SetBrush( toggleColor.WithAlpha( toggleHovered ? 0.2f : 0.08f ) );
		Paint.SetPen( toggleColor.WithAlpha( toggleHovered ? 0.5f : 0.2f ) );
		Paint.DrawRect( toggleRect, 3 );
		Paint.SetDefaultFont( size: 9, weight: 600 );
		Paint.SetPen( toggleColor.WithAlpha( toggleHovered ? 1f : 0.7f ) );
		Paint.DrawText( toggleRect, _secretKeyMasked ? "Show" : "Hide", TextFlag.Center );

		_buttons.Add( new ButtonRect
		{
			Rect = toggleRect,
			Id = "toggle_secret",
			OnClick = () =>
			{
				_secretKeyMasked = !_secretKeyMasked;
				Update();
			}
		} );

		y += fieldH + 2;

		// Secret key prefix hint
		var secKey = _secretKeyInput.Text?.Trim() ?? "";
		if ( !string.IsNullOrEmpty( secKey ) && !secKey.StartsWith( "sbox_sk_" ) )
		{
			Paint.SetDefaultFont( size: 8 );
			Paint.SetPen( Color.Orange.WithAlpha( 0.7f ) );
			Paint.DrawText( new Rect( pad, y, w, 12 ), "Standard secret keys start with sbox_sk_", TextFlag.LeftCenter );
			y += 14;
		}
		y += 4;

		DrawFieldLabel( ref y, pad, w, "Base URL" );
		PositionInput( _baseUrlInput, pad, y, w, fieldH );
		y += fieldH + 6;

		DrawFieldLabel( ref y, pad, w, "CDN URL" );
		PositionInput( _cdnUrlInput, pad, y, w, fieldH );
		y += fieldH + 6;

		DrawFieldLabel( ref y, pad, w, "Editor Data Folder" );
		PositionInput( _dataFolderInput, pad, y, w, fieldH );
		y += fieldH + 8;

		DrawSeparator( ref y, w, pad );

		// ── Data Source Preference ──
		Paint.SetDefaultFont( size: 10, weight: 600 );
		Paint.SetPen( Color.White.WithAlpha( 0.7f ) );
		Paint.DrawText( new Rect( pad, y, w, 18 ), "Data Source: API Only", TextFlag.LeftCenter );
		y += 24;

		// ── Save button ──
		var saveBtnH = 34f;
		var saveBtnRect = new Rect( pad, y, w, saveBtnH );
		var saveHovered = saveBtnRect.IsInside( _mousePos );

		Paint.SetBrush( Color.Green.WithAlpha( saveHovered ? 0.25f : 0.15f ) );
		Paint.SetPen( Color.Green.WithAlpha( saveHovered ? 0.6f : 0.3f ) );
		Paint.DrawRect( saveBtnRect, 4 );
		Paint.SetDefaultFont( size: 11, weight: 700 );
		Paint.SetPen( Color.Green.WithAlpha( saveHovered ? 1f : 0.8f ) );
		Paint.DrawText( saveBtnRect, "Save Configuration", TextFlag.Center );

		_buttons.Add( new ButtonRect { Rect = saveBtnRect, Id = "save", OnClick = SaveConfig } );
		y += saveBtnH + 8;

		// ── Test Connection button ──
		var testBtnH = 28f;
		var testBtnRect = new Rect( pad, y, w, testBtnH );
		var testHovered = testBtnRect.IsInside( _mousePos );

		Paint.SetBrush( Color.White.WithAlpha( testHovered ? 0.1f : 0.04f ) );
		Paint.SetPen( Color.White.WithAlpha( testHovered ? 0.3f : 0.15f ) );
		Paint.DrawRect( testBtnRect, 4 );
		Paint.SetDefaultFont( size: 10 );
		Paint.SetPen( Color.White.WithAlpha( testHovered ? 0.9f : 0.6f ) );
		Paint.DrawText( testBtnRect, "Test Connection", TextFlag.Center );

		_buttons.Add( new ButtonRect { Rect = testBtnRect, Id = "test", OnClick = () => _ = TestConnection() } );
		y += testBtnH + 8;

		// ── Test results ──
		if ( _testProjectId != null )
		{
			DrawTestResult( ref y, pad, w, "Project ID", _testProjectId, _testProjectTitle );
			DrawTestResult( ref y, pad, w, "Secret Key", _testSecretKey );
			DrawTestResult( ref y, pad, w, "Public Key", _testPublicKey );

			if ( !string.IsNullOrEmpty( _testPermissions ) )
			{
				y += 4;
				Paint.SetDefaultFont( size: 8, weight: 600 );
				Paint.SetPen( Color.White.WithAlpha( 0.5f ) );
				Paint.DrawText( new Rect( pad, y, w, 12 ), "Key Permissions:", TextFlag.LeftCenter );
				y += 14;
				Paint.SetDefaultFont( size: 8 );
				Paint.SetPen( Color.Cyan.WithAlpha( 0.7f ) );
				Paint.DrawText( new Rect( pad + 8, y, w - 8, 12 ), _testPermissions, TextFlag.LeftCenter );
				y += 14;
			}
			y += 4;
		}

		// ── Status ──
		if ( !string.IsNullOrEmpty( _status ) )
		{
			Paint.SetDefaultFont( size: 9 );
			var col = _statusColor == "green" ? Color.Green : _statusColor == "red" ? Color.Red : Color.White.WithAlpha( 0.6f );
			Paint.SetPen( col );
			Paint.DrawText( new Rect( pad, y, w, 16 ), _status, TextFlag.LeftCenter );
			y += 22;
		}

		// ── File location ──
		Paint.SetDefaultFont( size: 8 );
		Paint.SetPen( Color.White.WithAlpha( 0.25f ) );
		Paint.DrawText( new Rect( pad, y, w, 14 ), $"Saved to: {SyncToolConfig.EnvFilePath}", TextFlag.LeftCenter );
	}

	private void DrawFieldLabel( ref float y, float pad, float w, string label )
	{
		Paint.SetDefaultFont( size: 10, weight: 600 );
		Paint.SetPen( Color.White.WithAlpha( 0.8f ) );
		Paint.DrawText( new Rect( pad, y, w, 16 ), label, TextFlag.LeftCenter );
		y += 18;
	}

	private void DrawSeparator( ref float y, float w, float pad )
	{
		Paint.SetPen( Color.White.WithAlpha( 0.08f ) );
		Paint.DrawLine( new Vector2( pad, y ), new Vector2( pad + w, y ) );
		y += 10;
	}

	private void DrawTestResult( ref float y, float pad, float w, string label, string result, string extra = null )
	{
		if ( result == null ) return;

		var isOk = result.StartsWith( "Valid" ) || result.StartsWith( "Found" );
		var color = isOk ? Color.Green : Color.Red;

		Paint.SetDefaultFont( size: 9, weight: 600 );
		Paint.SetPen( color.WithAlpha( 0.8f ) );
		Paint.DrawText( new Rect( pad, y, 16, 15 ), isOk ? "+" : "x", TextFlag.Center );

		Paint.SetDefaultFont( size: 9 );
		Paint.SetPen( Color.White.WithAlpha( 0.7f ) );
		Paint.DrawText( new Rect( pad + 18, y, 80, 15 ), label, TextFlag.LeftCenter );

		var display = !string.IsNullOrEmpty( extra ) ? $"{result} — {extra}" : result;
		Paint.SetPen( color.WithAlpha( 0.7f ) );
		Paint.DrawText( new Rect( pad + 100, y, w - 100, 15 ), display, TextFlag.LeftCenter );

		y += 17;
	}

	// ──────────────────────────────────────────────────────
	//  Input handling
	// ──────────────────────────────────────────────────────

	protected override void OnMousePress( MouseEvent e )
	{
		base.OnMousePress( e );

		foreach ( var btn in _buttons )
		{
			if ( btn.Rect.IsInside( e.LocalPosition ) )
			{
				btn.OnClick?.Invoke();
				return;
			}
		}
	}

	protected override void OnMouseMove( MouseEvent e )
	{
		base.OnMouseMove( e );
		_mousePos = e.LocalPosition;
		Update();
	}

	// ──────────────────────────────────────────────────────
	//  Actions
	// ──────────────────────────────────────────────────────

	private void SaveConfig()
	{
		var projectId = _projectIdInput.Text?.Trim() ?? "";
		var publicKey = _publicKeyInput.Text?.Trim() ?? "";
		var secretKey = _secretKeyInput.Text?.Trim() ?? "";
		var baseUrl = _baseUrlInput.Text?.Trim() ?? "";
		var cdnUrl = _cdnUrlInput.Text?.Trim() ?? "";
		var dataFolder = _dataFolderInput.Text?.Trim() ?? "";

		if ( string.IsNullOrEmpty( projectId ) )
		{
			_status = "Project ID is required";
			_statusColor = "red";
			Update();
			return;
		}

		SyncToolConfig.Save( secretKey, publicKey, projectId, baseUrl, SyncToolConfig.DataSourceMode.ApiOnly, dataFolder, cdnUrl );

		// Warn about non-standard prefixes but still save
		var warnings = "";
		if ( !string.IsNullOrEmpty( publicKey ) && !publicKey.StartsWith( "sbox_ns_" ) )
			warnings += " (public key: non-standard prefix)";
		if ( !string.IsNullOrEmpty( secretKey ) && !secretKey.StartsWith( "sbox_sk_" ) )
			warnings += " (secret key: non-standard prefix)";

		if ( !string.IsNullOrEmpty( warnings ) )
		{
			_status = $"Saved with warnings:{warnings}";
			_statusColor = "green";
		}
		else
		{
			_status = "Configuration saved successfully";
			_statusColor = "green";
		}

		Update();
	}

	private async Task TestConnection()
	{
		SaveConfig();

		var projectId = _projectIdInput.Text?.Trim() ?? "";
		var secretKey = _secretKeyInput.Text?.Trim() ?? "";
		var publicKey = _publicKeyInput.Text?.Trim() ?? "";

		if ( string.IsNullOrEmpty( projectId ) || string.IsNullOrEmpty( secretKey ) )
		{
			_status = "Need at least Project ID + Secret Key to test";
			_statusColor = "red";
			_testProjectId = null;
			Update();
			return;
		}

		_status = "Testing credentials...";
		_statusColor = "white";
		_testProjectId = null;
		_testSecretKey = null;
		_testPublicKey = null;
		_testProjectTitle = null;
		_testPermissions = null;
		Update();

		var resp = await SyncToolApi.Validate( publicKey );

		if ( !resp.HasValue )
		{
			var errDetail = SyncToolApi.LastErrorMessage ?? "Could not reach server";
			_status = $"Validation failed: {errDetail}";
			_statusColor = "red";
			_testProjectId = SyncToolApi.LastErrorCode ?? "Connection failed";
			_testSecretKey = SyncToolApi.LastErrorCode ?? "Connection failed";
			_testPublicKey = SyncToolApi.LastErrorCode ?? "Connection failed";
			Log.Warning( $"[SyncTool] Validate returned null — LastError: {SyncToolApi.LastErrorCode} — {SyncToolApi.LastErrorMessage}" );
			Update();
			return;
		}

		var result = resp.Value;

		// Check for KEY_UPGRADE_REQUIRED error
		if ( SyncToolApi.LastErrorCode == "KEY_UPGRADE_REQUIRED" ||
		     (result.TryGetProperty( "error", out var errEl ) && errEl.GetString() == "KEY_UPGRADE_REQUIRED") )
		{
			_status = "Secret key uses an old format. Generate a new key at sbox.cool.";
			_statusColor = "red";
			_testProjectId = "Not checked";
			_testSecretKey = "Old format — regenerate on dashboard";
			_testPublicKey = "Not checked";
			Update();
			return;
		}

		if ( result.TryGetProperty( "checks", out var checks ) )
		{
			_testProjectId = GetCheckMessage( checks, "projectId" );
			_testSecretKey = GetCheckMessage( checks, "secretKey" );
			_testPublicKey = GetCheckMessage( checks, "publicKey" );
		}

		if ( result.TryGetProperty( "project", out var proj ) && proj.ValueKind == JsonValueKind.Object )
		{
			_testProjectTitle = proj.TryGetProperty( "title", out var t ) ? t.GetString() : null;
		}

		// Parse permissions if present
		if ( result.TryGetProperty( "permissions", out var perms ) && perms.ValueKind == JsonValueKind.Object )
		{
			var parts = new List<string>();
			var labels = new Dictionary<string, string>
			{
				{ "endpoints", "Endpoints" },
				{ "queries", "Queries" },
				{ "collections", "Collections" },
				{ "workflows", "Workflows" },
				{ "game_values", "Game Values" },
				{ "rate_limits", "Rate Limits" },
				{ "settings", "Settings" }
			};
			foreach ( var kv in labels )
			{
				if ( perms.TryGetProperty( kv.Key, out var val ) )
				{
					var access = val.GetString() ?? "rw";
					var label = FormatPermissionLabel( access );
					parts.Add( $"{kv.Value}: {label}" );
				}
			}
			_testPermissions = string.Join( "  |  ", parts );
		}

		var allOk = result.TryGetProperty( "ok", out var okEl ) && okEl.ValueKind == JsonValueKind.True;
		if ( allOk )
		{
			_status = "All credentials validated";
			_statusColor = "green";
		}
		else
		{
			// Build a meaningful error message from the check results
			var failedChecks = new List<string>();
			if ( _testProjectId != null && _testProjectId != "Found" ) failedChecks.Add( $"Project: {_testProjectId}" );
			if ( _testSecretKey != null && _testSecretKey != "Valid" ) failedChecks.Add( $"Secret key: {_testSecretKey}" );
			if ( _testPublicKey != null && _testPublicKey != "Valid" && _testPublicKey != "Not provided" ) failedChecks.Add( $"Public key: {_testPublicKey}" );

			_status = failedChecks.Count > 0
				? $"Failed: {string.Join( " | ", failedChecks )}"
				: "Validation failed — check console for details";
			_statusColor = "red";
		}
		Update();
	}

	private static string FormatPermissionLabel( string access )
	{
		if ( string.IsNullOrWhiteSpace( access ) || access == "none" ) return "-";
		return access.ToUpperInvariant();
	}

	private static string GetCheckMessage( JsonElement checks, string key )
	{
		if ( !checks.TryGetProperty( key, out var check ) ) return "Not checked";
		var msg = check.TryGetProperty( "message", out var m ) ? m.GetString() : "Unknown";
		return msg ?? "Unknown";
	}
}