<?php

namespace App\Http\Controllers\Reports;

use App\Enums\ExpenseCategory;
use App\Enums\FundingSource;
use App\Http\Controllers\Controller;
use App\Http\Requests\Reports\StoreMedicationExpenseValuesRequest;
use App\Models\Department;
use App\Models\MedicationExpenseRow;
use App\Models\MedicationExpenseValue;
use App\Models\ReportPeriod;
use App\Models\Team;
use App\Services\Reports\MedicationExpenseService;
use Illuminate\Http\RedirectResponse;
use Illuminate\Http\Request;
use Inertia\Inertia;
use Inertia\Response;

class MedicationExpenseController extends Controller
{
    /**
     * Display the medication expense page.
     */
    public function index(Request $request, Team $current_team, MedicationExpenseService $medicationExpenseService): Response
    {
        $periods = ReportPeriod::query()
            ->whereBelongsTo($current_team)
            ->orderByDesc('year')
            ->orderByDesc('month')
            ->get();

        $departments = Department::query()
            ->where('is_active', true)
            ->orderBy('name')
            ->get();

        /** @var ReportPeriod|null $selectedPeriod */
        $selectedPeriod = $periods->firstWhere('id', $request->integer('period', $periods->first()?->id));
        /** @var Department|null $selectedDepartment */
        $selectedDepartment = $departments->firstWhere('id', $request->integer('department', $departments->first()?->id));

        $expense = $selectedPeriod && $selectedDepartment
            ? $medicationExpenseService->calculateForDepartmentPeriod($selectedPeriod, $selectedDepartment)
            : ['matrix' => [], 'totals' => []];

        return Inertia::render('reports/medication-expenses/Index', [
            'periods' => $periods->map(fn (ReportPeriod $period) => [
                'id' => $period->id,
                'label' => $period->label(),
                'status' => $period->status->value,
                'statusLabel' => $period->status->label(),
                'isEditable' => $period->isEditable(),
            ])->values(),
            'departments' => $departments->map(fn (Department $department) => [
                'id' => $department->id,
                'name' => $department->name,
            ])->values(),
            'selectedPeriodId' => $selectedPeriod?->id,
            'selectedDepartmentId' => $selectedDepartment?->id,
            'fundingSources' => collect(FundingSource::cases())->map(fn (FundingSource $source) => [
                'value' => $source->value,
                'label' => $source->label(),
            ])->all(),
            'expenseCategories' => collect(ExpenseCategory::cases())->map(fn (ExpenseCategory $category) => [
                'value' => $category->value,
                'label' => $category->label(),
            ])->all(),
            'values' => $expense['matrix'],
            'totals' => $expense['totals'],
            'canEdit' => $selectedPeriod?->isEditable() ?? false,
        ]);
    }

    /**
     * Store medication expense values for a department and period.
     */
    public function storeValues(StoreMedicationExpenseValuesRequest $request, Team $current_team): RedirectResponse
    {
        $period = ReportPeriod::query()
            ->whereBelongsTo($current_team)
            ->findOrFail($request->integer('report_period_id'));

        abort_unless($period->isEditable(), 422);

        $department = Department::query()->findOrFail($request->integer('department_id'));

        $row = MedicationExpenseRow::query()->firstOrCreate([
            'report_period_id' => $period->id,
            'department_id' => $department->id,
        ]);

        foreach (FundingSource::cases() as $fundingSource) {
            foreach (ExpenseCategory::cases() as $expenseCategory) {
                MedicationExpenseValue::updateOrCreate([
                    'medication_expense_row_id' => $row->id,
                    'funding_source' => $fundingSource,
                    'expense_category' => $expenseCategory,
                ], [
                    'amount' => (float) ($request->input("values.{$fundingSource->value}.{$expenseCategory->value}") ?? 0),
                ]);
            }
        }

        return to_route('reports.medication-expenses.index', [
            'current_team' => $current_team,
            'period' => $period->id,
            'department' => $department->id,
        ]);
    }
}