<?php

namespace App\Http\Controllers;

use App\Models\Post;
use App\Models\PostThank;
use App\Models\User;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;
use Illuminate\Support\Str;

class PostThankController extends Controller
{
    public function store(Request $request, Post $post): JsonResponse
    {
        $user = $request->user();
        if (!$user) {
            return response()->json(['message' => 'Unauthenticated.'], 401);
        }

        $thank = PostThank::firstOrCreate([
            'post_id' => $post->id,
            'user_id' => $user->id,
        ]);

        return response()->json([
            'id' => $thank->id,
            'post_id' => $post->id,
            'user_id' => $user->id,
        ], 201);
    }

    public function destroy(Request $request, Post $post): JsonResponse
    {
        $user = $request->user();
        if (!$user) {
            return response()->json(['message' => 'Unauthenticated.'], 401);
        }

        PostThank::where('post_id', $post->id)
            ->where('user_id', $user->id)
            ->delete();

        return response()->json(null, 204);
    }

    public function given(User $user): JsonResponse
    {
        $thanks = PostThank::query()
            ->where('user_id', $user->id)
            ->with(['post.thread', 'post.user.rank', 'post.user.roles'])
            ->latest('created_at')
            ->get()
            ->map(fn (PostThank $thank) => $this->serializeGiven($thank));

        return response()->json($thanks);
    }

    public function received(User $user): JsonResponse
    {
        $thanks = PostThank::query()
            ->whereHas('post', fn ($query) => $query->where('user_id', $user->id))
            ->with(['post.thread', 'user.rank', 'user.roles'])
            ->latest('created_at')
            ->get()
            ->map(fn (PostThank $thank) => $this->serializeReceived($thank));

        return response()->json($thanks);
    }

    private function serializeGiven(PostThank $thank): array
    {
        return [
            'id' => $thank->id,
            'post_id' => $thank->post_id,
            'thread_id' => $thank->post?->thread_id,
            'thread_title' => $thank->post?->thread?->title,
            'post_excerpt' => $thank->post?->body ? Str::limit($thank->post->body, 120) : null,
            'post_author_id' => $thank->post?->user_id,
            'post_author_name' => $thank->post?->user?->name,
            'post_author_rank_color' => $thank->post?->user?->rank?->color,
            'post_author_group_color' => $this->resolveGroupColor($thank->post?->user),
            'thanked_at' => $thank->created_at?->toIso8601String(),
        ];
    }

    private function serializeReceived(PostThank $thank): array
    {
        return [
            'id' => $thank->id,
            'post_id' => $thank->post_id,
            'thread_id' => $thank->post?->thread_id,
            'thread_title' => $thank->post?->thread?->title,
            'post_excerpt' => $thank->post?->body ? Str::limit($thank->post->body, 120) : null,
            'thanker_id' => $thank->user_id,
            'thanker_name' => $thank->user?->name,
            'thanker_rank_color' => $thank->user?->rank?->color,
            'thanker_group_color' => $this->resolveGroupColor($thank->user),
            'thanked_at' => $thank->created_at?->toIso8601String(),
        ];
    }

    private function resolveGroupColor(?\App\Models\User $user): ?string
    {
        if (!$user) {
            return null;
        }

        $roles = $user->roles;
        if (!$roles) {
            return null;
        }

        foreach ($roles->sortBy('name') as $role) {
            if (!empty($role->color)) {
                return $role->color;
            }
        }

        return null;
    }
}