<?php

namespace App\Http\Controllers\Web;

use App\Http\Controllers\Controller;
use App\Models\Character;
use App\Models\Relationship;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;
use Illuminate\Support\Str;

/**
 * Social graph actions: friendships, marriage and children.
 */
class CitySocialController extends Controller
{
    /**
     * Handle a social verb for the caller's character.
     */
    public function handle(Request $request, string $verb): JsonResponse
    {
        $me = Character::ensureForUser($request->user());

        return match ($verb) {
            'friend' => $this->friend($request, $me),
            'accept-friend' => $this->acceptFriend($request, $me),
            'marry' => $this->marry($request, $me),
            'child' => $this->child($request, $me),
            default => response()->json(['message' => __('city.social_unknown')], 422),
        };
    }

    /**
     * Pending incoming social requests for the caller.
     */
    public function inbox(Request $request): JsonResponse
    {
        $me = Character::ensureForUser($request->user());

        $pending = Relationship::query()
            ->where('character_b_id', $me->id)
            ->where('status', Relationship::STATUS_PENDING)
            ->with('characterA:id,name')
            ->get()
            ->map(fn (Relationship $r) => [
                'id' => $r->id,
                'type' => $r->type,
                'from' => $r->characterA?->name,
            ]);

        $friends = Relationship::query()
            ->where('status', Relationship::STATUS_ACCEPTED)
            ->where('type', Relationship::TYPE_FRIEND)
            ->where(fn ($q) => $q->where('character_a_id', $me->id)->orWhere('character_b_id', $me->id))
            ->get()
            ->map(function (Relationship $r) use ($me) {
                $otherId = (int) $r->character_a_id === (int) $me->id ? $r->character_b_id : $r->character_a_id;

                return Character::query()->whereKey($otherId)->first(['id', 'name']);
            })
            ->filter();

        return response()->json([
            'pending' => $pending,
            'friends' => $friends,
        ]);
    }

    /**
     * Send a friendship request to another character.
     */
    private function friend(Request $request, Character $me): JsonResponse
    {
        $data = $request->validate(['character_id' => ['required', 'integer', 'exists:characters,id']]);
        $other = Character::query()->findOrFail($data['character_id']);

        if ((int) $other->id === (int) $me->id) {
            return response()->json(['message' => __('city.social_self')], 422);
        }

        $existing = Relationship::query()
            ->where('type', Relationship::TYPE_FRIEND)
            ->where(fn ($q) => $q->where('character_a_id', $me->id)->where('character_b_id', $other->id))
            ->orWhere(fn ($q) => $q->where('character_a_id', $other->id)->where('character_b_id', $me->id))
            ->first();

        if ($existing) {
            return response()->json(['message' => __('city.social_exists')], 422);
        }

        Relationship::create([
            'character_a_id' => $me->id,
            'character_b_id' => $other->id,
            'type' => Relationship::TYPE_FRIEND,
            'status' => Relationship::STATUS_PENDING,
        ]);

        return response()->json(['message' => __('city.social_friend_sent')]);
    }

    /**
     * Accept an incoming friendship request.
     */
    private function acceptFriend(Request $request, Character $me): JsonResponse
    {
        $data = $request->validate(['relationship_id' => ['required', 'integer', 'exists:relationships,id']]);
        $rel = Relationship::query()->findOrFail($data['relationship_id']);

        if ((int) $rel->character_b_id !== (int) $me->id || $rel->type !== Relationship::TYPE_FRIEND) {
            return response()->json(['message' => __('auth.forbidden')], 403);
        }

        $rel->status = Relationship::STATUS_ACCEPTED;
        $rel->save();

        return response()->json(['message' => __('city.social_friend_ok')]);
    }

    /**
     * Marry an accepted friend (one spouse max).
     */
    private function marry(Request $request, Character $me): JsonResponse
    {
        $data = $request->validate(['character_id' => ['required', 'integer', 'exists:characters,id']]);
        $other = Character::query()->findOrFail($data['character_id']);

        $friendship = Relationship::query()
            ->where('type', Relationship::TYPE_FRIEND)
            ->where('status', Relationship::STATUS_ACCEPTED)
            ->where(fn ($q) => $q->where('character_a_id', $me->id)->where('character_b_id', $other->id)
                ->orWhere(fn ($q2) => $q2->where('character_a_id', $other->id)->where('character_b_id', $me->id)))
            ->exists();

        if (! $friendship) {
            return response()->json(['message' => __('city.social_need_friend')], 422);
        }

        $existingSpouse = Relationship::query()
            ->where('type', Relationship::TYPE_SPOUSE)
            ->where('status', Relationship::STATUS_ACCEPTED)
            ->where(fn ($q) => $q->where('character_a_id', $me->id)->orWhere('character_b_id', $me->id))
            ->exists();

        if ($existingSpouse) {
            return response()->json(['message' => __('city.social_married')], 422);
        }

        Relationship::create([
            'character_a_id' => $me->id,
            'character_b_id' => $other->id,
            'type' => Relationship::TYPE_SPOUSE,
            'status' => Relationship::STATUS_ACCEPTED,
        ]);

        return response()->json(['message' => __('city.social_married_ok')]);
    }

    /**
     * Have a child with the current spouse (creates an NPC character).
     */
    private function child(Request $request, Character $me): JsonResponse
    {
        $data = $request->validate(['character_id' => ['required', 'integer', 'exists:characters,id']]);
        $spouse = Character::query()->findOrFail($data['character_id']);

        $married = Relationship::query()
            ->where('type', Relationship::TYPE_SPOUSE)
            ->where('status', Relationship::STATUS_ACCEPTED)
            ->where(fn ($q) => $q->where('character_a_id', $me->id)->where('character_b_id', $spouse->id)
                ->orWhere(fn ($q2) => $q2->where('character_a_id', $spouse->id)->where('character_b_id', $me->id)))
            ->exists();

        if (! $married) {
            return response()->json(['message' => __('city.social_need_spouse')], 422);
        }

        $childName = Str::limit($me->name.' '.$spouse->name, 40, '');
        $child = Character::create([
            'user_id' => null,
            'city_id' => $me->city_id,
            'name' => trim($childName) ?: 'Child',
            'skin' => $me->skin,
            'hair' => $me->hair,
            'shirt' => random_int(1, 5),
            'pos_x' => $me->pos_x + 1,
            'pos_z' => $me->pos_z + 1,
            'money' => 0,
            'energy' => 100,
            'hunger' => 100,
            'thirst' => 100,
            'state' => Character::STATE_AWAKE,
            'education' => 0,
            'is_online' => false,
        ]);

        foreach ([$me, $spouse] as $parent) {
            Relationship::create([
                'character_a_id' => $child->id,
                'character_b_id' => $parent->id,
                'type' => Relationship::TYPE_PARENT_CHILD,
                'status' => Relationship::STATUS_ACCEPTED,
            ]);
        }

        return response()->json([
            'message' => __('city.social_child_ok'),
            'child' => ['id' => $child->id, 'name' => $child->name],
        ]);
    }
}