<?php

namespace App\Http\Controllers\Transactions;

use App\Http\Controllers\Controller;
use App\Models\Transactions\Purchase;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Redirect;

class PurchaseController extends Controller
{
    public function index(): JsonResponse
    {
        $purchases = Purchase::orderBy('date', 'desc')->get();

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

    public function store(Request $request): \Illuminate\Http\RedirectResponse
    {
        $validated = $request->validate([
            'date' => 'required|date|before_or_equal:today',
            'shares' => 'required|numeric|min:0.000001',
            'price_per_share' => 'required|numeric|min:0.01',
            'total_cost' => 'required|numeric|min:0.01',
        ]);

        // Verify calculation is correct
        $calculatedTotal = $validated['shares'] * $validated['price_per_share'];
        if (abs($calculatedTotal - $validated['total_cost']) > 0.01) {
            return back()->withErrors([
                'total_cost' => 'Total cost does not match shares × price per share.'
            ]);
        }

        Purchase::create([
            'date' => $validated['date'],
            'shares' => $validated['shares'],
            'price_per_share' => $validated['price_per_share'],
            'total_cost' => $validated['total_cost'],
        ]);

        return Redirect::back()->with('success', 'Purchase added successfully!');
    }

    public function summary()
    {
        $totalShares = Purchase::totalShares();
        $totalInvestment = Purchase::totalInvestment();
        $averageCost = Purchase::averageCostPerShare();

        return response()->json([
            'total_shares' => $totalShares,
            'total_investment' => $totalInvestment,
            'average_cost_per_share' => $averageCost,
        ]);
    }

    /**
     * Remove the specified purchase.
     */
    public function destroy(Purchase $purchase)
    {
        $purchase->delete();

        return Redirect::back()->with('success', 'Purchase deleted successfully!');
    }
}