<?php

namespace App\DAL;

use App\Models\Enums\ReportStatus;
use App\Models\Study;
use Illuminate\Contracts\Pagination\LengthAwarePaginator;
use Illuminate\Database\Query\Builder;

final readonly class UserStudies
{
    private static function assignedStudiesQuery(?int $user_id = null): Builder
    {
        $user_id = (int) ($user_id ?? auth()->id());

        return self::defaultSortQuery(
            Study::active()->where('assigned_physician_id', $user_id)
        );
    }

    public static function assignedAll(?int $user_id = null): LengthAwarePaginator
    {
        return self::assignedStudiesQuery($user_id)
            ->paginate(user_per_page($user_id));
    }

    private static function reportCompleteQuery(Builder $query): Builder
    {
        return $query->where('report_status', '=', ReportStatus::Signed->value);
    }

    private static function defaultSortQuery(Builder $query): Builder
    {
        return $query
            ->orderBy('study_priority', 'desc')
            ->orderBy('received_at', 'asc');
    }

    private static function reportPendingQuery(Builder $query): Builder
    {
        return $query->where('report_status', '<', ReportStatus::Finalized->value);
    }

    public static function assignedPending(?int $user_id = null): LengthAwarePaginator
    {
        return self::reportPendingQuery(self::assignedStudiesQuery($user_id))
            ->paginate(user_per_page($user_id));
    }

    public static function assignedCompleted(?int $user_id = null): LengthAwarePaginator
    {
        return self::reportCompleteQuery(self::assignedStudiesQuery($user_id))
            ->paginate(user_per_page($user_id));
    }

    private static function institutedStudiesQuery(): Builder
    {
        $query = Study::active();
        $facility_id = auth()->user()->facility_id;
        if ($facility_id) {
            $query = $query->where('facility_id', $facility_id);
        } else {
            $institute_id = auth()->user()->institute_id;
            $query = $query->where('institute_id', $institute_id);
        }

        return self::defaultSortQuery($query);
    }

    public static function technicianAll(): LengthAwarePaginator
    {
        return self::institutedStudiesQuery()
            ->paginate(user_per_page());
    }

    public static function technicianPending(): LengthAwarePaginator
    {
        return self::reportPendingQuery(self::institutedStudiesQuery())
            ->paginate(user_per_page());
    }

    public static function technicianCompleted(): LengthAwarePaginator
    {
        return self::reportCompleteQuery(self::institutedStudiesQuery())
            ->paginate(user_per_page());
    }

    public static function adminAll(): LengthAwarePaginator
    {
        return self::defaultSortQuery(Study::active())
            ->paginate(user_per_page());
    }

    public static function adminPending(): LengthAwarePaginator
    {
        return self::reportPendingQuery(Study::active())
            ->paginate(user_per_page());
    }

    public static function adminCompleted(): LengthAwarePaginator
    {
        return self::reportCompleteQuery(Study::active())
            ->paginate(user_per_page());
    }
}