@extends('layouts.app')

@section('title', 'Teachers')

@section('content')

<div class="space-y-5">

    {{-- ============================================================
        Page Header
    ============================================================ --}}
    <div class="flex flex-col gap-4 lg:flex-row lg:items-center lg:justify-between">

        <div>

            <h1 class="text-xl font-semibold text-text">
                Teachers
            </h1>

            <p class="mt-1 text-sm text-muted">
                Manage teaching staff, employment details, class teacher roles and assignments.
            </p>

        </div>


        <div class="flex flex-wrap items-center gap-2">

            @can('teachers.view')

                <a
                    href="{{ route('teachers.export', [
                        'search' => request('search'),
                        'status' => request('status'),
                        'employment_type' => request('employment_type'),
                        'is_class_teacher' => request('is_class_teacher'),
                    ]) }}"
                    class="btn btn-secondary"
                >
                    <i class="fa-solid fa-file-export"></i>

                    <span>
                        Export CSV
                    </span>
                </a>

            @endcan


            @can('teachers.create')

                <a
                    href="{{ route('teachers.create') }}"
                    class="btn btn-primary"
                >
                    <i class="fa-solid fa-plus"></i>

                    <span>
                        New Teacher
                    </span>
                </a>

            @endcan

        </div>

    </div>


    {{-- ============================================================
        Filters
    ============================================================ --}}
    <div class="card p-4">

        <form
            id="teacher-filter-form"
            action="{{ route('teachers.index') }}"
            method="GET"
            class="flex flex-col gap-3 xl:flex-row xl:items-center"
        >

            {{-- Search --}}
            <div class="relative w-full xl:max-w-sm">

                <label
                    for="search"
                    class="sr-only"
                >
                    Search teachers
                </label>

                {{-- <i
                    class="fa-solid fa-magnifying-glass absolute left-3 top-1/2 -translate-y-1/2 text-xs text-muted"
                ></i> --}}

                <input
                    type="search"
                    id="search"
                    name="search"
                    value="{{ request('search') }}"
                    placeholder="Search name, ID, phone or designation..."
                    autocomplete="off"
                    class="form-input w-full pl-9"
                >

            </div>


            {{-- Employment Type --}}
            <div class="w-full sm:w-48">

                <label
                    for="employment_type"
                    class="sr-only"
                >
                    Employment Type
                </label>

                <select
                    id="employment_type"
                    name="employment_type"
                    class="form-select w-full"
                >
                    <option value="">
                        All Employment Types
                    </option>

                    <option
                        value="full_time"
                        @selected(request('employment_type') === 'full_time')
                    >
                        Full Time
                    </option>

                    <option
                        value="part_time"
                        @selected(request('employment_type') === 'part_time')
                    >
                        Part Time
                    </option>

                    <option
                        value="contract"
                        @selected(request('employment_type') === 'contract')
                    >
                        Contract
                    </option>

                    <option
                        value="temporary"
                        @selected(request('employment_type') === 'temporary')
                    >
                        Temporary
                    </option>
                </select>

            </div>


            {{-- Class Teacher --}}
            <div class="w-full sm:w-44">

                <label
                    for="is_class_teacher"
                    class="sr-only"
                >
                    Class Teacher
                </label>

                <select
                    id="is_class_teacher"
                    name="is_class_teacher"
                    class="form-select w-full"
                >
                    <option value="">
                        All Teacher Roles
                    </option>

                    <option
                        value="1"
                        @selected(request('is_class_teacher') === '1')
                    >
                        Class Teacher
                    </option>

                    <option
                        value="0"
                        @selected(request('is_class_teacher') === '0')
                    >
                        Not Class Teacher
                    </option>
                </select>

            </div>


            {{-- Status --}}
            <div class="w-full sm:w-40">

                <label
                    for="status"
                    class="sr-only"
                >
                    Status
                </label>

                <select
                    id="status"
                    name="status"
                    class="form-select w-full"
                >
                    <option value="">
                        All Status
                    </option>

                    <option
                        value="1"
                        @selected(request('status') === '1')
                    >
                        Active
                    </option>

                    <option
                        value="0"
                        @selected(request('status') === '0')
                    >
                        Inactive
                    </option>
                </select>

            </div>


            {{-- Filter --}}
            <button
                type="submit"
                class="btn btn-secondary shrink-0"
            >
                <i class="fa-solid fa-filter"></i>

                <span>
                    Filter
                </span>
            </button>


            {{-- Reset --}}
            @if(request()->hasAny([
                'search',
                'employment_type',
                'is_class_teacher',
                'status'
            ]))

                <a
                    href="{{ route('teachers.index') }}"
                    class="btn btn-secondary shrink-0"
                >
                    <i class="fa-solid fa-rotate-left"></i>

                    <span>
                        Reset
                    </span>
                </a>

            @endif

        </form>

    </div>


    {{-- ============================================================
        Active Filters
    ============================================================ --}}
    @if(
        filled(request('search')) ||
        filled(request('employment_type')) ||
        request('is_class_teacher') !== null &&
        request('is_class_teacher') !== '' ||
        request('status') !== null &&
        request('status') !== ''
    )

        <div class="flex flex-wrap items-center gap-2">

            <span class="text-xs font-medium text-muted">
                Active filters:
            </span>


            @if(filled(request('search')))

                <span class="badge-info">

                    {{-- <i class="fa-solid fa-magnifying-glass mr-1"></i> --}}

                    {{ request('search') }}

                </span>

            @endif


            @if(filled(request('employment_type')))

                <span class="badge-info">

                    <i class="fa-solid fa-briefcase mr-1"></i>

                    {{ ucwords(
                        str_replace(
                            '_',
                            ' ',
                            request('employment_type')
                        )
                    ) }}

                </span>

            @endif


            @if(
                request('is_class_teacher') !== null &&
                request('is_class_teacher') !== ''
            )

                @if(request('is_class_teacher') === '1')

                    <span class="badge-info">
                        Class Teacher
                    </span>

                @else

                    <span class="badge-info">
                        Not Class Teacher
                    </span>

                @endif

            @endif


            @if(
                request('status') !== null &&
                request('status') !== ''
            )

                @if(request('status') === '1')

                    <span class="badge-success">
                        Active
                    </span>

                @else

                    <span class="badge-danger">
                        Inactive
                    </span>

                @endif

            @endif

        </div>

    @endif


    {{-- ============================================================
        Bulk Actions
    ============================================================ --}}
    <div
        id="bulk-actions"
        class="hidden items-center justify-between gap-3 rounded-lg border border-border bg-card px-4 py-3"
    >

        <div class="flex items-center gap-3">

            <div class="flex h-8 w-8 items-center justify-center rounded-lg bg-primary/10 text-primary">
                <i class="fa-solid fa-check"></i>
            </div>

            <div>

                <p
                    id="selected-count"
                    class="text-sm font-medium text-text"
                >
                    0 selected
                </p>

                <p class="text-xs text-muted">
                    Selected teachers
                </p>

            </div>

        </div>


        @can('teachers.delete')

            <button
                type="button"
                id="bulk-delete"
                class="btn btn-danger"
            >
                <i class="fa-regular fa-trash-can"></i>

                <span>
                    Delete Selected
                </span>
            </button>

        @endcan

    </div>


    {{-- ============================================================
        Teachers Table
    ============================================================ --}}
    <div class="card overflow-hidden">

        {{-- Table Header --}}
        <div class="flex flex-col gap-3 border-b border-border px-5 py-4 sm:flex-row sm:items-center sm:justify-between">

            <div>

                <h2 class="text-base font-semibold text-text">
                    Teacher List
                </h2>

                <p class="mt-1 text-xs text-muted">

                    @if($teachers->total() > 0)

                        Showing
                        {{ number_format($teachers->firstItem()) }}
                        to
                        {{ number_format($teachers->lastItem()) }}
                        of
                        {{ number_format($teachers->total()) }}
                        teachers.

                    @else

                        No teachers available.

                    @endif

                </p>

            </div>


            @if($teachers->total() > 0)

                <div class="text-xs text-muted">

                    Page

                    <span class="font-medium text-text">
                        {{ $teachers->currentPage() }}
                    </span>

                    of

                    <span class="font-medium text-text">
                        {{ $teachers->lastPage() }}
                    </span>

                </div>

            @endif

        </div>


        <div class="overflow-x-auto">

            <table class="table">

                <thead>

                    <tr>

                        {{-- Select --}}
                        <th class="w-12">

                            <input
                                type="checkbox"
                                id="select-all"
                                class="rounded border-border"
                                aria-label="Select all teachers"
                            >

                        </th>


                        <th>
                            Teacher
                        </th>


                        <th>
                            Contact
                        </th>


                        <th>
                            Designation
                        </th>


                        <th>
                            Employment
                        </th>


                        <th class="text-center">
                            Assignments
                        </th>


                        <th>
                            Role
                        </th>


                        <th>
                            Status
                        </th>


                        <th class="text-right">
                            Actions
                        </th>

                    </tr>

                </thead>


                <tbody>

                    @forelse($teachers as $teacher)

                        <tr>

                            {{-- Checkbox --}}
                            <td>

                                <input
                                    type="checkbox"
                                    value="{{ $teacher->id }}"
                                    class="row-checkbox rounded border-border"
                                    aria-label="Select {{ $teacher->fullName() }}"
                                >

                            </td>


                            {{-- Teacher --}}
                            <td>

                                <div class="flex items-center gap-3">

                                    {{-- Profile --}}
                                    @if($teacher->hasPhoto())

                                        <img
                                            src="{{ asset('storage/' . $teacher->profile_photo) }}"
                                            alt="{{ $teacher->fullName() }}"
                                            class="h-9 w-9 shrink-0 rounded-lg object-cover"
                                        >

                                    @else

                                        <div class="flex h-9 w-9 shrink-0 items-center justify-center rounded-lg bg-primary/10 text-xs font-semibold text-primary">
                                            {{ $teacher->initials() }}
                                        </div>

                                    @endif


                                    <div class="min-w-0">

                                        @can('teachers.view')

                                            <a
                                                href="{{ route('teachers.show', $teacher) }}"
                                                class="block truncate text-sm font-medium text-text transition hover:text-primary"
                                            >
                                                {{ $teacher->fullName() }}
                                            </a>

                                        @else

                                            <p class="truncate text-sm font-medium text-text">
                                                {{ $teacher->fullName() }}
                                            </p>

                                        @endcan


                                        <div class="mt-1 flex flex-wrap items-center gap-2">

                                            <span class="text-xs text-muted">
                                                {{ $teacher->teacher_id }}
                                            </span>

                                            @if($teacher->gender)

                                                <span class="text-xs text-muted">
                                                    •
                                                </span>

                                                <span class="text-xs text-muted">
                                                    {{ $teacher->genderLabel() }}
                                                </span>

                                            @endif

                                        </div>

                                    </div>

                                </div>

                            </td>


                            {{-- Contact --}}
                            <td>

                                <div class="space-y-1">

                                    <div class="flex items-center gap-2 text-sm text-text">

                                        <i class="fa-solid fa-phone w-3 text-[10px] text-muted"></i>

                                        <span class="whitespace-nowrap">
                                            {{ $teacher->phone }}
                                        </span>

                                    </div>


                                    @if($teacher->email)

                                        <div class="flex max-w-52 items-center gap-2 text-xs text-muted">

                                            <i class="fa-regular fa-envelope w-3 text-[10px]"></i>

                                            <span
                                                class="truncate"
                                                title="{{ $teacher->email }}"
                                            >
                                                {{ $teacher->email }}
                                            </span>

                                        </div>

                                    @endif

                                </div>

                            </td>


                            {{-- Designation --}}
                            <td>

                                <div>

                                    <p class="text-sm font-medium text-text">
                                        {{ $teacher->designation }}
                                    </p>

                                    @if($teacher->qualification)

                                        <p
                                            class="mt-1 max-w-44 truncate text-xs text-muted"
                                            title="{{ $teacher->qualification }}"
                                        >
                                            {{ $teacher->qualification }}
                                        </p>

                                    @endif

                                </div>

                            </td>


                            {{-- Employment --}}
                            <td>

                                <div>

                                    <span class="badge-info">
                                        {{ $teacher->employmentTypeLabel() }}
                                    </span>

                                    @if($teacher->joining_date)

                                        <p class="mt-1.5 whitespace-nowrap text-xs text-muted">
                                            Joined {{ $teacher->joining_date->format('d M Y') }}
                                        </p>

                                    @endif

                                </div>

                            </td>


                            {{-- Assignments --}}
                            <td class="text-center">

                                <span class="inline-flex min-w-8 items-center justify-center rounded-lg bg-background px-2 py-1 text-xs font-medium text-text">
                                    {{ number_format($teacher->assignments_count ?? 0) }}
                                </span>

                            </td>


                            {{-- Class Teacher --}}
                            <td>

                                @if($teacher->is_class_teacher)

                                    <span class="badge-info">

                                        <i class="fa-solid fa-chalkboard-user mr-1"></i>

                                        Class Teacher

                                    </span>

                                @else

                                    <span class="text-xs text-muted">
                                        Teacher
                                    </span>

                                @endif

                            </td>


                            {{-- Status --}}
                            <td>

                                @if($teacher->is_active)

                                    <span class="badge-success">

                                        <span class="mr-1.5 h-1.5 w-1.5 rounded-full bg-success"></span>

                                        Active

                                    </span>

                                @else

                                    <span class="badge-danger">

                                        <span class="mr-1.5 h-1.5 w-1.5 rounded-full bg-danger"></span>

                                        Inactive

                                    </span>

                                @endif

                            </td>


                            {{-- Actions --}}
                            <td>

                                <div class="flex items-center justify-end gap-1">

                                    {{-- View --}}
                                    @can('teachers.view')

                                        <a
                                            href="{{ route('teachers.show', $teacher) }}"
                                            class="flex h-8 w-8 items-center justify-center rounded-lg text-muted transition hover:bg-background hover:text-primary"
                                            title="View teacher"
                                            aria-label="View {{ $teacher->fullName() }}"
                                        >
                                            <i class="fa-regular fa-eye text-xs"></i>
                                        </a>

                                    @endcan


                                    {{-- Edit --}}
                                    @can('teachers.edit')

                                        <a
                                            href="{{ route('teachers.edit', $teacher) }}"
                                            class="flex h-8 w-8 items-center justify-center rounded-lg text-muted transition hover:bg-background hover:text-primary"
                                            title="Edit teacher"
                                            aria-label="Edit {{ $teacher->fullName() }}"
                                        >
                                            <i class="fa-solid fa-pen text-xs"></i>
                                        </a>

                                    @endcan


                                    {{-- Delete --}}
                                    @can('teachers.delete')

                                        <form
                                            action="{{ route('teachers.destroy', $teacher) }}"
                                            method="POST"
                                            class="delete-form"
                                        >
                                            @csrf
                                            @method('DELETE')

                                            <button
                                                type="submit"
                                                data-name="{{ $teacher->fullName() }}"
                                                class="flex h-8 w-8 items-center justify-center rounded-lg text-muted transition hover:bg-dangerLight hover:text-danger"
                                                title="Delete teacher"
                                                aria-label="Delete {{ $teacher->fullName() }}"
                                            >
                                                <i class="fa-regular fa-trash-can text-xs"></i>
                                            </button>

                                        </form>

                                    @endcan

                                </div>

                            </td>

                        </tr>

                    @empty

                        <tr>

                            <td
                                colspan="9"
                                class="py-14 text-center"
                            >

                                <div class="mx-auto flex h-12 w-12 items-center justify-center rounded-lg bg-background text-muted">
                                    <i class="fa-solid fa-chalkboard-user text-lg"></i>
                                </div>


                                @if(
                                    filled(request('search')) ||
                                    filled(request('employment_type')) ||
                                    request('is_class_teacher') !== null &&
                                    request('is_class_teacher') !== '' ||
                                    request('status') !== null &&
                                    request('status') !== ''
                                )

                                    <p class="mt-4 text-sm font-medium text-text">
                                        No matching teachers found
                                    </p>

                                    <p class="mx-auto mt-1 max-w-sm text-xs leading-5 text-muted">
                                        No teachers match the current search or filter criteria.
                                    </p>

                                    <a
                                        href="{{ route('teachers.index') }}"
                                        class="btn btn-secondary mt-4"
                                    >
                                        <i class="fa-solid fa-rotate-left"></i>

                                        Clear Filters
                                    </a>

                                @else

                                    <p class="mt-4 text-sm font-medium text-text">
                                        No teachers found
                                    </p>

                                    <p class="mx-auto mt-1 max-w-sm text-xs leading-5 text-muted">
                                        Add your first teacher to start managing teaching staff and class assignments.
                                    </p>

                                    @can('teachers.create')

                                        <a
                                            href="{{ route('teachers.create') }}"
                                            class="btn btn-primary mt-4"
                                        >
                                            <i class="fa-solid fa-plus"></i>

                                            New Teacher
                                        </a>

                                    @endcan

                                @endif

                            </td>

                        </tr>

                    @endforelse

                </tbody>

            </table>

        </div>


        {{-- ========================================================
            Pagination
        ======================================================== --}}
        @if($teachers->hasPages())

            <div class="border-t border-border px-5 py-4">

                {{ $teachers->withQueryString()->links() }}

            </div>

        @endif

    </div>

</div>


{{-- ================================================================
    Bulk Delete Form
================================================================ --}}
<form
    id="bulk-delete-form"
    action="{{ route('teachers.bulk-delete') }}"
    method="POST"
    class="hidden"
>
    @csrf
    @method('DELETE')

    <div id="bulk-delete-inputs"></div>

</form>

@endsection


@push('scripts')

<script>
document.addEventListener('DOMContentLoaded', function () {

    /*
    |--------------------------------------------------------------------------
    | Elements
    |--------------------------------------------------------------------------
    */

    const filterForm =
        document.getElementById('teacher-filter-form');

    const searchInput =
        document.getElementById('search');

    const employmentTypeFilter =
        document.getElementById('employment_type');

    const classTeacherFilter =
        document.getElementById('is_class_teacher');

    const statusFilter =
        document.getElementById('status');

    const selectAll =
        document.getElementById('select-all');

    const rowCheckboxes =
        document.querySelectorAll('.row-checkbox');

    const bulkActions =
        document.getElementById('bulk-actions');

    const selectedCount =
        document.getElementById('selected-count');

    const bulkDeleteButton =
        document.getElementById('bulk-delete');

    const bulkDeleteForm =
        document.getElementById('bulk-delete-form');

    const bulkDeleteInputs =
        document.getElementById('bulk-delete-inputs');


    /*
    |--------------------------------------------------------------------------
    | Debounced Search
    |--------------------------------------------------------------------------
    */

    let searchTimer = null;

    if (searchInput && filterForm) {

        searchInput.addEventListener('input', function () {

            clearTimeout(searchTimer);

            searchTimer = setTimeout(function () {

                filterForm.submit();

            }, 500);

        });

    }


    /*
    |--------------------------------------------------------------------------
    | Automatic Filters
    |--------------------------------------------------------------------------
    */

    [
        employmentTypeFilter,
        classTeacherFilter,
        statusFilter
    ].forEach(function (filter) {

        filter?.addEventListener(
            'change',
            function () {

                filterForm?.submit();

            }
        );

    });


    /*
    |--------------------------------------------------------------------------
    | Selected Rows
    |--------------------------------------------------------------------------
    */

    function getSelectedCheckboxes() {

        return document.querySelectorAll(
            '.row-checkbox:checked'
        );

    }


    /*
    |--------------------------------------------------------------------------
    | Update Bulk Actions
    |--------------------------------------------------------------------------
    */

    function updateBulkActions() {

        const selected =
            getSelectedCheckboxes();

        const count =
            selected.length;


        if (selectedCount) {

            selectedCount.textContent =
                `${count} selected`;

        }


        if (bulkActions) {

            bulkActions.classList.toggle(
                'hidden',
                count === 0
            );

            bulkActions.classList.toggle(
                'flex',
                count > 0
            );

        }


        if (selectAll) {

            selectAll.checked =
                rowCheckboxes.length > 0 &&
                count === rowCheckboxes.length;

            selectAll.indeterminate =
                count > 0 &&
                count < rowCheckboxes.length;

        }

    }


    /*
    |--------------------------------------------------------------------------
    | Select All
    |--------------------------------------------------------------------------
    */

    selectAll?.addEventListener(
        'change',
        function () {

            rowCheckboxes.forEach(
                function (checkbox) {

                    checkbox.checked =
                        selectAll.checked;

                }
            );

            updateBulkActions();

        }
    );


    /*
    |--------------------------------------------------------------------------
    | Individual Selection
    |--------------------------------------------------------------------------
    */

    rowCheckboxes.forEach(
        function (checkbox) {

            checkbox.addEventListener(
                'change',
                updateBulkActions
            );

        }
    );


    /*
    |--------------------------------------------------------------------------
    | Bulk Delete
    |--------------------------------------------------------------------------
    */

    bulkDeleteButton?.addEventListener(
        'click',
        function () {

            const selected =
                getSelectedCheckboxes();


            if (selected.length === 0) {

                window.alert(
                    'Please select at least one teacher.'
                );

                return;

            }


            const confirmed =
                window.confirm(
                    `Are you sure you want to delete ${selected.length} selected teacher(s)? Teachers with existing assignments will be protected automatically.`
                );


            if (!confirmed) {
                return;
            }


            if (
                !bulkDeleteInputs ||
                !bulkDeleteForm
            ) {
                return;
            }


            bulkDeleteInputs.innerHTML = '';


            selected.forEach(
                function (checkbox) {

                    const input =
                        document.createElement('input');

                    input.type =
                        'hidden';

                    input.name =
                        'ids[]';

                    input.value =
                        checkbox.value;

                    bulkDeleteInputs.appendChild(
                        input
                    );

                }
            );


            bulkDeleteButton.disabled =
                true;

            bulkDeleteForm.submit();

        }
    );


    /*
    |--------------------------------------------------------------------------
    | Individual Delete Confirmation
    |--------------------------------------------------------------------------
    */

    document
        .querySelectorAll('.delete-form')
        .forEach(
            function (form) {

                form.addEventListener(
                    'submit',
                    function (event) {

                        const button =
                            form.querySelector(
                                '[data-name]'
                            );

                        const name =
                            button?.dataset.name ??
                            'this teacher';


                        const confirmed =
                            window.confirm(
                                `Are you sure you want to delete "${name}"? Teachers with existing assignments cannot be deleted.`
                            );


                        if (!confirmed) {

                            event.preventDefault();

                        }

                    }
                );

            }
        );


    /*
    |--------------------------------------------------------------------------
    | Initial State
    |--------------------------------------------------------------------------
    */

    updateBulkActions();

});
</script>

@endpush