<?php

namespace Modules\ClinicalData\Http\Controllers;

use Illuminate\Http\Request;
use Streamline\Models\AgeGroup;
use Streamline\Models\Observation;
use Illuminate\Support\Facades\Auth;
use Illuminate\Database\QueryException;

class ObservationController extends Controller {

    public function __construct() {
        $this->middleware('auth');
        $this->middleware('permission:observation-list', ['only' => ['index']]);
        $this->middleware('permission:observation-create', ['only' => ['create', 'store']]);
        $this->middleware('permission:observation-edit', ['only' => ['edit', 'update']]);
        $this->middleware('permission:observation-delete', ['only' => ['destroy', 'inactive', 'activate']]);
    }

    /**
     * Display a listing of the resource.
     *
     * @return \Illuminate\Http\Response
     */
    public function index() {
        $observations = Observation::orderBy('name', 'asc')->paginate(50);

        return view('clinical_data::observations.index', compact('observations'));
    }

    /**
     * Show the form for creating a new resource.
     *
     */
    public function create() {
        $age_groups = AgeGroup::orderBy('name', 'asc')
                ->pluck('name', 'id')
                ->toArray();

        return view('clinical_data::observations.create', compact('age_groups'));
    }

    /**
     * Store a newly created resource in storage.
     *
     */
    public function store(Request $request) {
        request()->validate([
            'name' => 'required'
        ]);

        $logged_in_user_id = Auth::user()->id;
        $observation = new Observation;
        $observation->name = $request->name;
        $observation->measurement = $request->measurement;

        if ($request->options_or_range == "2") {
            $options = implode(',', $request->options);

            if ($options == "") {
                flash("Please select options for this observation")->error();
                return back()->withInput();
            }

            $observation->options = $options;
        }

        $observation->option_for_normal = $request->option_for_normal;
        $observation->lower_limit = $request->lower_limit;
        $observation->upper_limit = $request->upper_limit;

        if(is_array($request->age_group)){
            $age_group = implode(',', $request->age_group);
        } else {
            $age_group = "";
        }

        $observation->age_group = $age_group;
        $observation->slug = str_replace(' ', '_', strtolower($request->name));
        $observation->compulsory = $request->compulsory;
        $observation->created_by = $logged_in_user_id;
        $observation->updated_by = $logged_in_user_id;
        try {
            $observation->save();
            flash($request->name . " Observation has been saved")->success();
            return redirect("/observations/");
        } catch (QueryException $e) {
            flash("An error occurred")->error();
            return back()->withInput();
        }
    }

    /**
     * Display the specified resource.
     *
     * @param  int  $id
     * @return \Illuminate\Http\Response
     */
    public function show($id) {
        //
    }

    /**
     * Show the form for editing the specified resource.
     *
     * @param  int  $id
     * @return \Illuminate\Http\Response
     */
    public function edit($id) {
        $observation = Observation::where(['id' => $id])->first();

        $age_groups = AgeGroup::orderBy('name', 'asc')
                ->pluck('name', 'id')
                ->toArray();

        if (!$observation) {
            flash()->error("There is no such observation");
            return redirect('/observations/');
        } else {
            return view('clinical_data::observations.edit', compact('observation', 'age_groups'));
        }
    }

    /**
     * Update the specified resource in storage.
     *
     */
    public function update(Request $request, $id) {
        request()->validate([
            'name' => 'required'
        ]);

        $logged_in_user_id = Auth::user()->id;

        $observation = Observation::find($id);
        $observation->name = $request->name;
        $observation->measurement = $request->measurement;

        if ($request->options_or_range == "2") {
            if (!is_array($request->options)) {
                flash("Please select options for this observation")->error();
                return back()->withInput();
            }

            $options = implode(',', $request->options);

            $observation->options = $options;
        } else {
            $observation->options = NULL;
        }

        $observation->option_for_normal = $request->option_for_normal;
        $observation->lower_limit = $request->lower_limit;
        $observation->upper_limit = $request->upper_limit;

        if(is_array($request->age_group)){
            $age_group = implode(',', $request->age_group);
        } else {
            $age_group = "";
        }

        $observation->age_group = $age_group;
        $observation->compulsory = $request->compulsory;
        $observation->created_by = $logged_in_user_id;
        $observation->updated_by = $logged_in_user_id;
        try {
            $observation->save();
            flash($request->name . " Observation has been updated")->success();
            return redirect("/observations/");
        } catch (QueryException $e) {
            flash("An error occurred")->error();
            return back()->withInput();
        }
    }

    /**
     * Remove the specified resource from storage.
     *
     * @param  int  $id
     * @return \Illuminate\Http\Response
     */
    public function destroy($id) {
        $observation = Observation::find($id);

        if ($observation->delete()):
            flash("Observation has been deleted.")->success();
            return redirect('/observations/');
        endif;
    }

    /**
     * Display a listing of the inactive resource(s).
     *
     * @return \Illuminate\Http\Response
     */
    public function inactive() {
        $observations = Observation::onlyTrashed()
                ->orderBy('name', 'asc')
                ->paginate(50);

        if (count($observations) < 1) {
            flash()->error("There is no inactive observation");
            return redirect('/observations/');
        } else {
            return view('clinical_data::observations.inactive', compact('observations'));
        }
    }

    /**
     * Activate the specified resource in storage.
     *
     * @param  int  $id
     * @return \Illuminate\Http\Response
     */
    public function activate($id) {
        $observation = Observation::withTrashed()->find($id);

        if ($observation->restore()){
            flash("Observation has been activated.")->success();
            return redirect('/observations/inactive');
        }
    }

    public function get_observation_info($id) {
        $observation = Observation::find($id);

        $return_data = [];

        if ($observation) {
            $return_data["error"] = 0;
            $return_data["slug"] = $observation->slug;
            $return_data["normal_range"] = $observation->lower_limit . ' - ' . $observation->upper_limit;
        } else {
            $return_data["error"] = 1;
        }

        return json_encode($return_data);
    }
}