<?php

declare(strict_types=1);

namespace App\Http\Controllers\Admin;

use App\Http\Controllers\Controller;
use App\Models\Story;
use App\Models\StoryTag;
use App\Models\User;
use App\Notifications\StoryStatusNotification;
use Illuminate\Http\RedirectResponse;
use Illuminate\Http\Request;
use Illuminate\Support\Str;
use Illuminate\Validation\Rule;
use Illuminate\View\View;

class StoryAdminController extends Controller
{
    public function index(): View
    {
        $stories = Story::query()
            ->with(['creator'])
            ->latest('created_at')
            ->paginate(25);

        return view('admin.stories.index', ['stories' => $stories]);
    }

    public function review(): View
    {
        $stories = Story::query()
            ->with(['creator'])
            ->where('status', 'pending_review')
            ->orderByDesc('submitted_for_review_at')
            ->paginate(25);

        return view('admin.stories.review', ['stories' => $stories]);
    }

    public function create(): View
    {
        return view('admin.stories.create', [
            'creators' => User::query()->orderBy('username')->limit(200)->get(['id', 'username']),
            'tags' => StoryTag::query()->orderBy('name')->get(['id', 'name']),
        ]);
    }

    public function store(Request $request): RedirectResponse
    {
        $validated = $request->validate([
            'creator_id' => ['required', 'integer', 'exists:users,id'],
            'title' => ['required', 'string', 'max:255'],
            'excerpt' => ['nullable', 'string', 'max:500'],
            'cover_image' => ['nullable', 'string', 'max:500'],
            'content' => ['required', 'string'],
            'story_type' => ['required', 'in:creator_story,tutorial,interview,project_breakdown,announcement,resource'],
            'status' => ['required', Rule::in(['draft', 'pending_review', 'published', 'scheduled', 'archived', 'rejected'])],
            'tags' => ['nullable', 'array'],
            'tags.*' => ['integer', 'exists:story_tags,id'],
        ]);

        $story = Story::query()->create([
            'creator_id' => (int) $validated['creator_id'],
            'title' => $validated['title'],
            'slug' => $this->uniqueSlug($validated['title']),
            'excerpt' => $validated['excerpt'] ?? null,
            'cover_image' => $validated['cover_image'] ?? null,
            'content' => $validated['content'],
            'story_type' => $validated['story_type'],
            'reading_time' => max(1, (int) ceil(str_word_count(strip_tags((string) $validated['content'])) / 200)),
            'status' => $validated['status'],
            'published_at' => $validated['status'] === 'published' ? now() : null,
            'submitted_for_review_at' => $validated['status'] === 'pending_review' ? now() : null,
        ]);

        if (! empty($validated['tags'])) {
            $story->tags()->sync($validated['tags']);
        }

        return redirect()->route('admin.stories.edit', ['story' => $story->id])
            ->with('status', 'Story created.');
    }

    public function edit(Story $story): View
    {
        $story->load('tags');

        return view('admin.stories.edit', [
            'story' => $story,
            'creators' => User::query()->orderBy('username')->limit(200)->get(['id', 'username']),
            'tags' => StoryTag::query()->orderBy('name')->get(['id', 'name']),
        ]);
    }

    public function update(Request $request, Story $story): RedirectResponse
    {
        $validated = $request->validate([
            'creator_id' => ['required', 'integer', 'exists:users,id'],
            'title' => ['required', 'string', 'max:255'],
            'excerpt' => ['nullable', 'string', 'max:500'],
            'cover_image' => ['nullable', 'string', 'max:500'],
            'content' => ['required', 'string'],
            'story_type' => ['required', 'in:creator_story,tutorial,interview,project_breakdown,announcement,resource'],
            'status' => ['required', Rule::in(['draft', 'pending_review', 'published', 'scheduled', 'archived', 'rejected'])],
            'tags' => ['nullable', 'array'],
            'tags.*' => ['integer', 'exists:story_tags,id'],
        ]);

        $story->update([
            'creator_id' => (int) $validated['creator_id'],
            'title' => $validated['title'],
            'excerpt' => $validated['excerpt'] ?? null,
            'cover_image' => $validated['cover_image'] ?? null,
            'content' => $validated['content'],
            'story_type' => $validated['story_type'],
            'reading_time' => max(1, (int) ceil(str_word_count(strip_tags((string) $validated['content'])) / 200)),
            'status' => $validated['status'],
            'published_at' => $validated['status'] === 'published' ? ($story->published_at ?? now()) : $story->published_at,
            'submitted_for_review_at' => $validated['status'] === 'pending_review' ? ($story->submitted_for_review_at ?? now()) : $story->submitted_for_review_at,
        ]);

        $story->tags()->sync($validated['tags'] ?? []);

        return back()->with('status', 'Story updated.');
    }

    public function destroy(Story $story): RedirectResponse
    {
        $story->delete();

        return redirect()->route('admin.stories.index')->with('status', 'Story deleted.');
    }

    public function publish(Story $story): RedirectResponse
    {
        $story->update([
            'status' => 'published',
            'published_at' => $story->published_at ?? now(),
            'reviewed_at' => now(),
        ]);

        $story->creator?->notify(new StoryStatusNotification($story, 'published'));

        return back()->with('status', 'Story published.');
    }

    public function show(Story $story): View
    {
        return view('admin.stories.show', [
            'story' => $story->load(['creator', 'tags']),
        ]);
    }

    public function approve(Request $request, Story $story): RedirectResponse
    {
        $story->update([
            'status' => 'published',
            'published_at' => $story->published_at ?? now(),
            'reviewed_at' => now(),
            'reviewed_by_id' => (int) $request->user()->id,
            'rejected_reason' => null,
        ]);

        $story->creator?->notify(new StoryStatusNotification($story, 'approved'));

        return back()->with('status', 'Story approved and published.');
    }

    public function reject(Request $request, Story $story): RedirectResponse
    {
        $validated = $request->validate([
            'reason' => ['required', 'string', 'max:1000'],
        ]);

        $story->update([
            'status' => 'rejected',
            'reviewed_at' => now(),
            'reviewed_by_id' => (int) $request->user()->id,
            'rejected_reason' => $validated['reason'],
        ]);

        $story->creator?->notify(new StoryStatusNotification($story, 'rejected', $validated['reason']));

        return back()->with('status', 'Story rejected and creator notified.');
    }

    public function moderateComments(): View
    {
        return view('admin.stories.comments-moderation');
    }

    private function uniqueSlug(string $title): string
    {
        $base = Str::slug($title);
        $slug = $base;
        $n = 2;

        while (Story::query()->where('slug', $slug)->exists()) {
            $slug = $base . '-' . $n;
            $n++;
        }

        return $slug;
    }
}