<?php

namespace App\Http\Controllers;

use App\Models\CoachReview;
use App\Models\MatchPoint;
use App\Models\MatchRound;
use App\Models\Video;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Auth;

class MatchEventController extends Controller
{
    // ==================== ROUNDS ====================

    public function storeRound(Request $request, Video $video)
    {
        $request->validate([
            'round_number' => 'required|integer|min:1',
            'name' => 'nullable|string|max:50',
            'start_time_seconds' => 'nullable|integer|min:0',
        ]);

        // Check if user owns the video
        if (Auth::id() !== $video->user_id) {
            return response()->json(['success' => false, 'message' => 'Unauthorized'], 403);
        }

        $round = MatchRound::create([
            'video_id' => $video->id,
            'round_number' => $request->round_number,
            'name' => $request->name ?? 'ROUND '.$request->round_number,
            'start_time_seconds' => $request->start_time_seconds,
        ]);

        return response()->json([
            'success' => true,
            'round' => $round,
            'message' => 'Round added successfully!',
        ]);
    }

    public function updateRound(Request $request, MatchRound $round)
    {
        $request->validate([
            'round_number' => 'sometimes|integer|min:1',
            'name' => 'required|string|max:50',
            'start_time_seconds' => 'nullable|integer|min:0',
        ]);

        // Check if user owns the video
        if (Auth::id() !== $round->video->user_id) {
            return response()->json(['success' => false, 'message' => 'Unauthorized'], 403);
        }

        $round->update([
            'round_number' => $request->round_number ?? $round->round_number,
            'name' => $request->name,
            'start_time_seconds' => $request->start_time_seconds,
        ]);

        return response()->json([
            'success' => true,
            'round' => $round,
            'message' => 'Round updated successfully!',
        ]);
    }

    public function destroyRound(MatchRound $round)
    {
        // Check if user owns the video
        if (Auth::id() !== $round->video->user_id) {
            return response()->json(['success' => false, 'message' => 'Unauthorized'], 403);
        }

        $round->delete();

        return response()->json([
            'success' => true,
            'message' => 'Round deleted successfully!',
        ]);
    }

    // ==================== POINTS ====================

    public function storePoint(Request $request, Video $video)
    {
        $request->validate([
            'round_id' => 'required|exists:match_rounds,id',
            'timestamp_seconds' => 'required|integer|min:0',
            'action' => 'required|string|max:255',
            'points' => 'required|integer|min:1',
            'competitor' => 'required|in:blue,red',
            'notes' => 'nullable|string|max:500',
        ]);

        // Check if user owns the video
        if (Auth::id() !== $video->user_id) {
            return response()->json(['success' => false, 'message' => 'Unauthorized'], 403);
        }

        // Create the row first with placeholder scores, then recompute the whole
        // round's running scores. This is the only correct approach when two
        // points can share a timestamp (Blue + Red at the same moment) or when
        // a point is inserted between existing ones.
        $point = MatchPoint::create([
            'video_id' => $video->id,
            'match_round_id' => $request->round_id,
            'timestamp_seconds' => $request->timestamp_seconds,
            'action' => $request->action,
            'points' => $request->points,
            'competitor' => $request->competitor,
            'notes' => $request->notes,
            'score_blue' => 0,
            'score_red' => 0,
        ]);

        $this->recomputeRoundScores($request->round_id);

        return response()->json([
            'success' => true,
            'point' => $point->fresh(),
            'message' => 'Point added successfully!',
        ]);
    }

    /**
     * Recompute cumulative score_blue/score_red for every point in a round,
     * ordered by (timestamp_seconds, id). Handles same-timestamp ties by
     * insertion order, so Blue and Red saved at the same moment both end up
     * reflecting the running score after that moment.
     */
    private function recomputeRoundScores(int $roundId): void
    {
        $blue = 0;
        $red  = 0;
        MatchPoint::where('match_round_id', $roundId)
            ->orderBy('timestamp_seconds', 'asc')
            ->orderBy('id', 'asc')
            ->get()
            ->each(function (MatchPoint $p) use (&$blue, &$red) {
                if ($p->competitor === 'blue') $blue += (int) $p->points;
                else                            $red  += (int) $p->points;
                if ((int) $p->score_blue !== $blue || (int) $p->score_red !== $red) {
                    $p->update(['score_blue' => $blue, 'score_red' => $red]);
                }
            });
    }

    public function updatePoint(Request $request, MatchPoint $point)
    {
        $request->validate([
            'timestamp_seconds' => 'required|integer|min:0',
            'action' => 'required|string|max:255',
            'points' => 'required|integer|min:1',
            'competitor' => 'required|in:blue,red',
            'notes' => 'nullable|string|max:500',
        ]);

        // Check if user owns the video
        if (Auth::id() !== $point->video->user_id) {
            return response()->json(['success' => false, 'message' => 'Unauthorized'], 403);
        }

        $roundId = $point->match_round_id;
        $point->update([
            'timestamp_seconds' => $request->timestamp_seconds,
            'action' => $request->action,
            'points' => $request->points,
            'competitor' => $request->competitor,
            'notes' => $request->notes,
        ]);

        $this->recomputeRoundScores($roundId);

        return response()->json([
            'success' => true,
            'point' => $point->fresh(),
            'message' => 'Point updated successfully!',
        ]);
    }

    public function destroyPoint(MatchPoint $point)
    {
        // Check if user owns the video
        if (Auth::id() !== $point->video->user_id) {
            return response()->json(['success' => false, 'message' => 'Unauthorized'], 403);
        }

        $roundId = $point->match_round_id;
        $point->delete();
        $this->recomputeRoundScores($roundId);

        return response()->json([
            'success' => true,
            'message' => 'Point deleted successfully!',
        ]);
    }

    // ==================== COACH REVIEWS ====================

    public function storeReview(Request $request, Video $video)
    {
        $request->validate([
            'start_time_seconds' => 'required|integer|min:0',
            'end_time_seconds' => 'nullable|integer|min:0',
            'note' => 'required|string|max:1000',
            'coach_name' => 'required|string|max:100',
            'emoji' => 'nullable|string|max:10',
        ]);

        // Check if user owns the video
        if (Auth::id() !== $video->user_id) {
            return response()->json(['success' => false, 'message' => 'Unauthorized'], 403);
        }

        $review = CoachReview::create([
            'video_id' => $video->id,
            'user_id' => Auth::id(),
            'start_time_seconds' => $request->start_time_seconds,
            'end_time_seconds' => $request->end_time_seconds,
            'note' => $request->note,
            'coach_name' => $request->coach_name,
            'emoji' => $request->emoji ?? '🔥',
        ]);

        return response()->json([
            'success' => true,
            'review' => $review,
            'message' => 'Coach note added successfully!',
        ]);
    }

    public function updateReview(Request $request, CoachReview $review)
    {
        $request->validate([
            'start_time_seconds' => 'required|integer|min:0',
            'end_time_seconds' => 'nullable|integer|min:0',
            'note' => 'required|string|max:1000',
            'coach_name' => 'required|string|max:100',
            'emoji' => 'nullable|string|max:10',
        ]);

        // Check if user owns the video
        if (Auth::id() !== $review->video->user_id) {
            return response()->json(['success' => false, 'message' => 'Unauthorized'], 403);
        }

        $review->update([
            'start_time_seconds' => $request->start_time_seconds,
            'end_time_seconds' => $request->end_time_seconds,
            'note' => $request->note,
            'coach_name' => $request->coach_name,
            'emoji' => $request->emoji,
        ]);

        return response()->json([
            'success' => true,
            'review' => $review,
            'message' => 'Coach note updated successfully!',
        ]);
    }

    public function destroyReview(CoachReview $review)
    {
        // Check if user owns the video
        if (Auth::id() !== $review->video->user_id) {
            return response()->json(['success' => false, 'message' => 'Unauthorized'], 403);
        }

        $review->delete();

        return response()->json([
            'success' => true,
            'message' => 'Coach note deleted successfully!',
        ]);
    }

    // ==================== GET DATA ====================

    public function getMatchData(Video $video)
    {
        // Check if user can view this video
        if (! $video->canView(Auth::user())) {
            return response()->json(['success' => false, 'message' => 'Unauthorized'], 403);
        }

        $rounds = MatchRound::where('video_id', $video->id)
            ->with('points')
            ->orderBy('round_number')
            ->get();

        $reviews = CoachReview::where('video_id', $video->id)
            ->orderBy('start_time_seconds')
            ->get();

        return response()->json([
            'success' => true,
            'rounds' => $rounds,
            'reviews' => $reviews,
        ]);
    }
}