<?php

namespace App\Http\Controllers;

use DB;
use Storage;
use App\User;
use App\Couple;
use Illuminate\Http\Request;
use App\Http\Requests\Users\UpdateRequest;

class UsersController extends Controller
{
    /**
     * Search user by keyword.
     *
     * @return \Illuminate\Http\Response
     */
    public function search(Request $request)
    {
        $q = $request->get('q');
        $users = [];

        if ($q) {
            $users = User::with('father', 'mother')->where(function ($query) use ($q) {
                $query->where('name', 'like', '%'.$q.'%');
                $query->orWhere('nickname', 'like', '%'.$q.'%');
            })
                ->orderBy('name', 'asc')
                ->paginate(24);
        }

        return view('users.search', compact('users'));
    }

    /**
     * Display the specified User.
     *
     * @param \App\User $user
     *
     * @return \Illuminate\Http\Response
     */
    public function show(User $user)
    {
        $usersMariageList = $this->getUserMariageList($user);
        $allMariageList = $this->getAllMariageList();
        $malePersonList = $this->getPersonList(1);
        $femalePersonList = $this->getPersonList(2);

        return view('users.show', [
            'user'             => $user,
            'usersMariageList' => $usersMariageList,
            'malePersonList'   => $malePersonList,
            'femalePersonList' => $femalePersonList,
            'allMariageList'   => $allMariageList,
        ]);
    }

    /**
     * Display the user's family chart.
     *
     * @param \App\User $user
     *
     * @return \Illuminate\Http\Response
     */
    public function chart(User $user)
    {
        $father = $user->father_id ? $user->father : null;
        $mother = $user->mother_id ? $user->mother : null;

        $fatherGrandpa = $father && $father->father_id ? $father->father : null;
        $fatherGrandma = $father && $father->mother_id ? $father->mother : null;

        $motherGrandpa = $mother && $mother->father_id ? $mother->father : null;
        $motherGrandma = $mother && $mother->mother_id ? $mother->mother : null;

        $childs = $user->childs;
        $colspan = $childs->count();
        $colspan = $colspan < 4 ? 4 : $colspan;

        $siblings = $user->siblings();
        return view('users.chart', compact('user', 'childs', 'father', 'mother', 'fatherGrandpa', 'fatherGrandma', 'motherGrandpa', 'motherGrandma', 'siblings', 'colspan'));
    }

    /**
     * Show user family tree.
     *
     * @param \App\User $user
     *
     * @return \Illuminate\Http\Response
     */
    public function tree(User $user)
    {
        return view('users.tree', compact('user'));
    }

    /**
     * Show the form for editing the specified User.
     *
     * @param \App\User $user
     *
     * @return \Illuminate\Http\Response
     */
    public function edit(User $user)
    {
        $this->authorize('edit', $user);

        $replacementUsers = [];
        if (request('action') == 'delete') {
            $replacementUsers = $this->getPersonList($user->gender_id);
        }

        return view('users.edit', compact('user', 'replacementUsers'));
    }

    /**
     * Update the specified User in storage.
     *
     * @param \App\Http\Requests\Users\UpdateRequest $request
     * @param \App\User                $user
     *
     * @return \Illuminate\Http\Response
     */
    public function update(UpdateRequest $request, User $user)
    {
        $user->update($request->validated());

        return redirect()->route('users.show', $user->id);
    }

    /**
     * Remove the specified User from storage.
     *
     * @param \Illuminate\Http\Request $request
     * @param \App\User                $user
     *
     * @return \Illuminate\Http\Response
     */
    public function destroy(Request $request, User $user)
    {
        $this->authorize('delete', $user);

        if ($request->has('replace_delete_button')) {
            $attributes = $request->validate([
                'replacement_user_id' => 'required|exists:users,id',
            ], [
                'replacement_user_id.required' => __('validation.user.replacement_user_id.required'),
            ]);

            DB::beginTransaction();
            $this->replaceUserOnUsersTable($user->id, $attributes['replacement_user_id']);
            $this->replaceUserOnCouplesTable($user->id, $attributes['replacement_user_id']);
            $user->delete();
            DB::commit();

            return redirect()->route('users.show', $attributes['replacement_user_id']);
        }

        request()->validate([
            'user_id' => 'required',
        ]);

        if (request('user_id') == $user->id && $user->delete()) {
            return redirect()->route('users.search');
        }

        return back();
    }

    /**
     * Upload users photo.
     *
     * @param \Illuminate\Http\Request $request
     * @param \App\User                $user
     *
     * @return \Illuminate\Http\Response
     */
    public function photoUpload(Request $request, User $user)
    {
        $request->validate([
            'photo' => 'required|image|max:200',
        ]);

        $storage = env('APP_ENV') == 'testing' ? 'avatars' : 'public';

        if (Storage::disk($storage)->exists($user->photo_path)) {
            Storage::disk($storage)->delete($user->photo_path);
        }

        $user->photo_path = $request->photo->store('images', $storage);
        $user->save();

        return back();
    }

    /**
     * Replace User Ids on users table.
     *
     * @param string $oldUserId
     * @param string $replacementUserId
     *
     * @return void
     */
    private function replaceUserOnUsersTable($oldUserId, $replacementUserId)
    {
        foreach (['father_id', 'mother_id', 'manager_id'] as $field) {
            DB::table('users')->where($field, $oldUserId)->update([
                $field => $replacementUserId,
            ]);
        }
    }

    /**
     * Replace User Ids on couples table.
     *
     * @param string $oldUserId
     * @param string $replacementUserId
     *
     * @return void
     */
    private function replaceUserOnCouplesTable($oldUserId, $replacementUserId)
    {
        foreach (['husband_id', 'wife_id', 'manager_id'] as $field) {
            DB::table('couples')->where($field, $oldUserId)->update([
                $field => $replacementUserId,
            ]);
        }
    }

    /**
     * Get User list based on gender.
     *
     * @param int $genderId
     *
     * @return \Illuminate\Support\Collection
     */
    private function getPersonList(int $genderId)
    {
        return User::where('gender_id', $genderId)->pluck('nickname', 'id');
    }

    /**
     * Get marriage list of a user.
     *
     * @param \App\User $user
     *
     * @return array
     */
    private function getUserMariageList(User $user)
    {
        $usersMariageList = [];

        foreach ($user->couples as $spouse) {
            $usersMariageList[$spouse->pivot->id] = $user->name.' & '.$spouse->name;
        }

        return $usersMariageList;
    }

    /**
     * Get all marriage list.
     *
     * @return array
     */
    private function getAllMariageList()
    {
        $allMariageList = [];

        foreach (Couple::with('husband', 'wife')->get() as $couple) {
            $allMariageList[$couple->id] = $couple->husband->name.' & '.$couple->wife->name;
        }

        return $allMariageList;
    }
}