import React, { useEffect, useState } from 'react';
import { AiOutlineClose, AiOutlineUpload, AiOutlineEdit } from 'react-icons/ai';
import { MdImage, MdCloudUpload } from 'react-icons/md';
import api from '../../../config/api';
import DrawSignatureCanvas from './DrawSignatureCanvas';
import { FaSpinner } from "react-icons/fa";
import { GrCheckboxSelected } from "react-icons/gr";

interface AddSignatureModalProps {
    setShowAddSignature?: (value: boolean) => void;
    getAllSignatures: () => Promise<void>; 
}
interface Account {
    id: number;
    isDefault: boolean;
    name: string;
}

interface UserData {
    id: string;
    firstName: string;
    lastName: string;
    email: string;
    language: string;
    account: Account;
}

interface SelectStyle {
    id: number,
    style: string
}
const AddSignatureModal: React.FC<AddSignatureModalProps> = ({ setShowAddSignature , getAllSignatures }) => {
    const [activeTab, setActiveTab] = useState<'SELECT' | 'DRAW' | 'UPLOAD'>('SELECT');
    const [fullName, setFullName] = useState('');
    const [initials, setInitials] = useState('');
    const [isSubmitting, setIsSubmitting] = useState<boolean>(false);
    const [signatures, setSignatures] = useState<{
        fullSignature: string | null;
        initials: string | null;
    }>({ fullSignature: null, initials: null });
    const signatureOptions = [
        { id: 1, name: 'print', initials: 'LA', style: 'print' },
        { id: 2, name: 'cursive', initials: 'LA', style: 'cursive' },
        { id: 3, name: 'script', initials: 'LA', style: 'script' },
        { id: 4, name: 'elegant', initials: 'LA', style: 'elegant' },
        { id: 5, name: 'modern', initials: 'LA', style: 'modern' },
        { id: 6, name: 'classic', initials: 'LA', style: 'classic' },
    ];
    const [selectedSignature, setSelectedSignature] = useState<SelectStyle>(
        signatureOptions.length > 0 ? { id: signatureOptions[0].id, style: signatureOptions[0].style } : { id: 0, style: "" }
    );

    // Store the actual file
    const [file1, setFile1] = useState<File | null>(null);
    const [file2, setFile2] = useState<File | null>(null);

    // Store the preview URL
    const [preview1, setPreview1] = useState<string | null>(null);
    const [preview2, setPreview2] = useState<string | null>(null);

    //user
    const [user, setUser] = useState<UserData>({
        id: "",
        firstName: "",
        lastName: "",
        email: "",
        language: "",
        account: {
            id: 0,
            isDefault: false,
            name: "",
        },
    });
    // Navigation items
    const navigationItems = [
        { id: 'SELECT', label: 'SELECT', icon: <GrCheckboxSelected className="w-4 h-4" /> },
        { id: 'DRAW', label: 'DRAW', icon: <AiOutlineEdit className="w-5 h-5" /> },
        { id: 'UPLOAD', label: 'UPLOAD', icon: <AiOutlineUpload className="w-5 h-5" /> },
    ];
    console.log("signatures", signatures)
    const handleSignatureChange = (data: { fullSignature: string | null; initials: string | null }) => {
        setSignatures(data);
    };
    console.log("activeTab", activeTab)
    console.log("selectedSignature", selectedSignature);

    console.log('file1', file1)
    console.log("file1", file2)


    // Cleanup preview URLs when component unmounts or image changes
    useEffect(() => {
        return () => {
            if (preview1) URL.revokeObjectURL(preview1);
            if (preview2) URL.revokeObjectURL(preview2);
        };
    }, [preview1, preview2]);

    const handleImageChange = async (
        e: React.ChangeEvent<HTMLInputElement>,
        setFile: React.Dispatch<React.SetStateAction<File | null>>,
        setPreview: React.Dispatch<React.SetStateAction<string | null>>,
        type: "fullSignature" | "initials"
    ) => {
        const file = e.target.files?.[0];
        if (file) {
            setFile(file);
            const previewUrl = URL.createObjectURL(file);
            setPreview(previewUrl);

            // Convert to base64
            const base64 = await convertToBase64(file);

            // Update the appropriate signature
            setSignatures((prev) => ({
                ...prev,
                [type]: base64,
            }));
        }
    };

    const convertToBase64 = (file: File): Promise<string> => {
        return new Promise((resolve, reject) => {
            const reader = new FileReader();
            reader.readAsDataURL(file);
            reader.onload = () => resolve(reader.result as string);
            reader.onerror = (error) => reject(error);
        });
    };

    const handleSubmit = async () => {
        setIsSubmitting(true)
        if (!signatures.fullSignature || !signatures.initials) {
            alert('Please provide both signature and initials');
            return;
        }
        try {
            const payload = {
                signatureType: activeTab,
                // "signatureId": 0, this work on only the put req.
                signatureBase64: signatures.fullSignature,
                initialsBase64: signatures.initials,
                firstName: user.firstName,
                lastName: user.lastName,
                font: selectedSignature.style
            };

            console.log('Submitting Signature:', payload);
            let res = await api.post(`/api/user/signatures`, payload)
            console.log("handleSubmit", res)
            if (res?.data) {
                getAllSignatures()
                setShowAddSignature?.(false)
            }
        } catch (error) {
            console.error("Error fetching user details:", error);
        } finally {
            setIsSubmitting(false)
        }
    };


    const renderContent = () => {
        switch (activeTab) {
            case 'SELECT':
                return (
                    <div className="h-full flex flex-col ">
                        <div className="mb-6">
                            <h2 className="text-xl font-semibold text-gray-900 mb-2">Choose Signature Style</h2>
                            <p className="text-sm text-gray-600">Select from pre-designed signature styles</p>
                        </div>

                        <div className="flex-1 overflow-y-auto">
                            <div className="space-y-4">
                                {signatureOptions.map((option) => (
                                    <div key={option.id} className="flex items-center space-x-4 px-2 py-1 border border-gray-200 rounded-lg hover:bg-gray-50 transition-colors">
                                        <input
                                            type="radio"
                                            id={`signature-${option.id}`}
                                            name="signature"
                                            checked={selectedSignature.id === option.id}
                                            onChange={() => setSelectedSignature({ id: option.id, style: option.style })}
                                            className="w-4 h-4 text-blue-600 focus:ring-blue-500"
                                        />
                                        <div className="flex-1 grid grid-cols-2 gap-2">
                                            <div className=" border-gray-300 rounded-lg px-2 py-1 bg-white ">
                                                <div className="text-xs text-gray-500 mb-2">Signed by:</div>
                                                <div className={`text-lg ${option.style === 'cursive' ? 'font-serif italic' :
                                                    option.style === 'script' ? 'font-mono' :
                                                        option.style === 'elegant' ? 'font-serif' :
                                                            option.style === 'modern' ? 'font-sans tracking-wide' :
                                                                'font-sans'
                                                    }`}>
                                                    {fullName || option.name}
                                                </div>
                                                <div className="text-xs text-gray-400 mt-2">
                                                    dca3e646-62cd-4cc...
                                                </div>
                                            </div>
                                            <div className=" rounded-lg px-2 py-2 bg-white ">
                                                <div className="text-xs text-gray-500 mb-2">DS</div>
                                                <div className={`text-2xl ${option.style === 'cursive' ? 'font-serif italic' :
                                                    option.style === 'script' ? 'font-mono' :
                                                        option.style === 'elegant' ? 'font-serif' :
                                                            option.style === 'modern' ? 'font-sans tracking-wide' :
                                                                'font-sans'
                                                    }`}>
                                                    {initials || option.initials}
                                                </div>
                                            </div>
                                        </div>
                                    </div>
                                ))}
                            </div>
                        </div>
                    </div>
                );

            case 'DRAW':
                return (
                    <DrawSignatureCanvas onSignatureChange={handleSignatureChange} />
                );

            case 'UPLOAD':
                return (
                    <div className="h-full flex flex-col">
                        <div className="mb-6">
                            <h2 className="text-xl font-semibold text-gray-900 mb-2">Upload Signature</h2>
                        </div>
                        <div className="flex-1 overflow-y-auto">
                            <div>
                                <div className="grid grid-cols-12 gap-6">
                                    {/* Upload 1 */}
                                    <div className="col-span-8">
                                        <label className="block text-sm font-medium text-gray-700 mb-2">Full Signature</label>
                                        <label htmlFor="upload1" className=" border-2 border-dashed border-gray-300 rounded-lg h-62 flex items-center justify-center bg-gray-50 hover:bg-gray-100 cursor-pointer transition-colors">
                                            {preview1 ? (
                                                <img src={preview1} alt="Signature Preview" className="max-h-44 object-contain" />
                                            ) : (
                                                <div className="text-center">
                                                    <MdCloudUpload className="mx-auto h-12 w-12 text-gray-400 mb-3" />
                                                    <p className="text-sm text-gray-500 mb-1">Click to upload or drag and drop</p>
                                                    <p className="text-xs text-gray-400">PNG, JPG, GIF up to 10MB</p>
                                                </div>
                                            )}
                                        </label>
                                        <input
                                            id="upload1"
                                            type="file"
                                            accept="image/*"
                                            className="hidden"
                                            onChange={(e) => handleImageChange(e, setFile1, setPreview1, "fullSignature")}
                                        />
                                    </div>

                                    {/* Upload 2 */}
                                    <div className="col-span-4">
                                        <label className="block text-sm font-medium text-gray-700 mb-2">Initials</label>
                                        <label htmlFor="upload2" className=" border-2 border-dashed border-gray-300 rounded-lg h-62 flex items-center justify-center bg-gray-50 hover:bg-gray-100 cursor-pointer transition-colors">
                                            {preview2 ? (
                                                <img src={preview2} alt="Initials Preview" className="max-h-44 object-contain" />
                                            ) : (
                                                <div className="text-center">
                                                    <MdCloudUpload className="mx-auto h-8 w-8 text-gray-400 mb-2" />
                                                    <p className="text-xs text-gray-500">Upload initials</p>
                                                </div>
                                            )}
                                        </label>
                                        <input
                                            id="upload2"
                                            type="file"
                                            accept="image/*"
                                            className="hidden"
                                            onChange={(e) => handleImageChange(e, setFile2, setPreview2, "initials")}
                                        />
                                    </div>
                                </div>
                            </div>
                        </div>
                    </div>
                );

            default:
                return null;
        }
    };

    const getUserDetails = async () => {
        try {
            let res = await api.get(`/api/user/details`)
            console.log("getuser", res)
            let currUser = res?.data
            setUser(currUser)
            setFullName(currUser.firstName + " " + currUser.lastName)
            setInitials(currUser.firstName.slice(0, 1) + currUser.lastName.slice(0, 1))
        } catch (error) {
            console.error("Error fetching user details:", error);
        }
    }

    useEffect(() => {
        getUserDetails()
    }, [])

    return (
        <div className="fixed inset-0 backdrop-blur-sm bg-opacity-50 flex items-center justify-center z-50 p-4">
            <div className="bg-white rounded-md shadow-xl w-full max-w-[80vw] h-[80vh] flex relative">

                {/* Sidebar Navigation */}
                <div className="w-64 bg-gray-50 rounded-l-lg border-r border-gray-200 flex flex-col">
                    {/* Header */}
                    <div className="px-4 py-4 border-b border-gray-200">
                        <div className="flex items-center space-x-3">
                            <div className='px-1 py-1'>
                                <h3 className="text-md font-semibold text-gray-900">Add Signature</h3>
                                <p className="text-xs text-gray-500">Create your digital signature</p>
                            </div>
                        </div>
                    </div>

                    {/* Form Inputs */}
                    <div className="px-6 py-2.5 border-b border-gray-200">
                        <div className="space-y-2">
                            <div>
                                <label className="block text-sm font-medium text-gray-700 mb-2">
                                    Full Name
                                </label>
                                <input
                                    type="text"
                                    value={fullName}
                                    onChange={(e) => setFullName(e.target.value)}
                                    placeholder="Enter full name"
                                    className="w-full px-3 py-2 text-sm border border-gray-300 rounded-md focus:outline-none focus:ring-2 focus:ring-blue-500 focus:border-transparent"
                                />
                            </div>

                            <div>
                                <label className="block text-sm font-medium text-gray-700 mb-2">
                                    Initials
                                </label>
                                <input
                                    type="text"
                                    value={initials}
                                    onChange={(e) => setInitials(e.target.value)}
                                    placeholder="Enter initials"
                                    className="w-full px-3 py-2 text-sm border border-gray-300 rounded-md focus:outline-none focus:ring-2 focus:ring-blue-500 focus:border-transparent"
                                />
                            </div>
                        </div>
                    </div>

                    {/* Navigation Menu */}
                    <div className="flex-1 px-6 py-2.5">
                        <nav className="space-y-2">
                            {navigationItems.map((item) => (
                                <button
                                    key={item.id}
                                    onClick={() => setActiveTab(item.id as 'SELECT' | 'DRAW' | 'UPLOAD')}
                                    className={`w-full flex items-center space-x-3 px-2 py-2 text-sm font-medium rounded-lg cursor-pointer transition-colors ${activeTab === item.id
                                        ? 'bg-blue-50 text-blue-700 border border-blue-200'
                                        : 'text-gray-600 hover:bg-gray-100 hover:text-gray-900'
                                        }`}
                                >
                                    <span className={activeTab === item.id ? 'text-blue-600' : 'text-gray-400'}>
                                        {item.icon}
                                    </span>

                                    <span>{item.label}</span>
                                </button>
                            ))}
                        </nav>
                    </div>

                </div>

                {/* Main Content Area */}
                <div className="flex-1 flex flex-col ">
                    {/* Header with close button */}

                    {/* Content */}
                    <div className="flex-1 py-5 px-5 overflow-hidden ">
                        {/* <button
                            onClick={() => setShowAddSignature?.(false)}
                            className="absolute top-2 right-3 p-2 hover:bg-gray-100 rounded-full transition-colors z-20"
                        >
                            <AiOutlineClose className="w-5 h-5 text-gray-500" />
                        </button> */}
                        {renderContent()}
                    </div>

                    {/* Footer Buttons in Main Area */}
                    <div className="p-4 border-t border-gray-200 flex justify-end gap-3">
                        <button
                            className="cursor-pointer px-4 py-2 text-sm font-medium rounded-md border border-gray-300 text-gray-700 hover:bg-gray-50 transition-colors disabled:opacity-60 disabled:cursor-not-allowed"
                            onClick={() => setShowAddSignature?.(false)}
                            disabled={isSubmitting}
                        >
                            CANCEL
                        </button>
                        <button
                            className="cursor-pointer px-4 py-2 text-sm font-medium rounded-md bg-blue-600 text-white hover:bg-blue-700 transition-colors flex items-center gap-2 disabled:opacity-60 disabled:cursor-not-allowed"
                            onClick={handleSubmit}
                            disabled={isSubmitting}
                        >
                            {isSubmitting ? (
                                <>
                                    <FaSpinner className="animate-spin" />
                                    CREATING...
                                </>
                            ) : (
                                "CREATE SIGNATURE"
                            )}
                        </button>
                    </div>

                </div>
            </div>
        </div>
    );
};

export default AddSignatureModal;