<?php

namespace App\Http\Controllers;

use App\Http\Requests\StoreMutationRequest;
use App\Models\Dynamic;
use App\Models\Ledger;
use App\Models\Mutation;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\DB;

class MutationController extends Controller
{
    /**
     * Display a listing of the resource.
     */
    public function index()
    {
        //
    }

    /**
     * Show the form for creating a new resource.
     */
    public function create()
    {
        //
    }

    /**
     * Store a newly created resource in storage.
     */
    public function store(StoreMutationRequest $request, Dynamic $dynamic, Ledger $ledger)
    {
        $isOwner = $dynamic->participants()
            ->where('user_id', $request->user()->id)
            ->where('role', 'owner')
            ->exists();

        // If the user is an owner, default status to 'approved'. Otherwise default to 'pending'.
        $status = $isOwner ? 'approved' : 'pending';

        $mutation = DB::transaction(function () use ($request, $ledger, $status) {
            $mutation = $ledger->mutations()->create([
                ...$request->except(['media', 'type', 'status']),
                'user_id' => $request->user()->id,
                'type' => $request->input('type', $request->input('amount') >= 0 ? 'addition' : 'subtraction'),
                'status' => $status,
            ]);

            if ($request->hasFile('media')) {
                foreach ($request->file('media') as $file) {
                    $path = $file->store('media', 'public');
                    $mutation->media()->create([
                        'file_path' => $path,
                        'file_name' => $file->getClientOriginalName(),
                        'mime_type' => $file->getMimeType(),
                    ]);
                }
            }

            // Only increment score if the status is approved!
            if ($status === 'approved') {
                $ledger->increment('score', $request->validated('amount'));
            }

            return $mutation;
        });

        // Broadcast the real-time creation event!
        broadcast(new \App\Events\MutationCreated($mutation));

        return redirect()->route('dynamics.ledgers.show', [$dynamic, $ledger]);
    }

    /**
     * Display the specified resource.
     */
    public function show(Dynamic $dynamic, Ledger $ledger, Mutation $mutation)
    {
        //
    }

    /**
     * Show the form for editing the specified resource.
     */
    public function edit(Dynamic $dynamic, Ledger $ledger, Mutation $mutation)
    {
        //
    }

    /**
     * Update the specified resource in storage.
     */
    public function update(Request $request, Dynamic $dynamic, Ledger $ledger, Mutation $mutation)
    {
        // 1. Authorize - only owners can update mutation status!
        $isOwner = $dynamic->participants()
            ->where('user_id', $request->user()->id)
            ->where('role', 'owner')
            ->exists();

        if (!$isOwner) {
            abort(403, 'Only dynamic owners can approve or reject mutations.');
        }

        $request->validate([
            'status' => ['required', 'string', 'in:approved,rejected'],
        ]);

        $oldStatus = $mutation->status;
        $newStatus = $request->input('status');

        DB::transaction(function () use ($mutation, $ledger, $oldStatus, $newStatus) {
            $mutation->update(['status' => $newStatus]);

            // Adjust the ledger score if status transitions to approved or from approved!
            if ($oldStatus !== 'approved' && $newStatus === 'approved') {
                $ledger->increment('score', $mutation->amount);
            } elseif ($oldStatus === 'approved' && $newStatus !== 'approved') {
                $ledger->decrement('score', $mutation->amount);
            }
        });

        // Log to Mutation and Dynamic chats
        $user = $request->user();
        $statusText = strtoupper($newStatus);

        $mutationMsg = $mutation->chat->messages()->create([
            'user_id' => $user->id,
            'content' => "System: Suggestion was {$statusText} by {$user->name}.",
        ]);
        broadcast(new \App\Events\MessageSent($mutationMsg));

        if ($newStatus === 'approved') {
            $dynamicMsg = $dynamic->chat->messages()->create([
                'user_id' => $user->id,
                'content' => "System: {$user->name} APPROVED the suggestion \"{$mutation->description}\" for " . ($mutation->amount >= 0 ? '+' : '') . "{$mutation->amount} points on \"{$ledger->name}\" ledger.",
            ]);
        } else {
            $dynamicMsg = $dynamic->chat->messages()->create([
                'user_id' => $user->id,
                'content' => "System: {$user->name} REJECTED the suggestion \"{$mutation->description}\" on \"{$ledger->name}\" ledger.",
            ]);
        }
        broadcast(new \App\Events\MessageSent($dynamicMsg));

        // Broadcast the real-time update event!
        broadcast(new \App\Events\MutationUpdated($mutation));

        return redirect()->back();
    }

    /**
     * Remove the specified resource from storage.
     */
    public function destroy(Dynamic $dynamic, Ledger $ledger, Mutation $mutation)
    {
        //
    }
}