<?php

namespace App\Http\Controllers;

use App\Http\Resources\PublicBusinessOpportunityResource;
use App\Models\ExistingBusiness;
use App\Services\CountryCatalogue;
use App\Services\ExistingBusinessDrafts;
use App\Services\ExistingBusinessClassification;
use App\Services\OpportunityClassification;
use App\Services\InvestmentGeography;
use Illuminate\Database\Eloquent\Builder;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\DB;
use Illuminate\Validation\Rule;
use Inertia\Inertia;
use Inertia\Response;

class PublicBusinessOpportunityController extends Controller
{
    public function index(Request $request): Response|JsonResponse
    {
        $filters = $this->filters($request);

        $query = $this->publishedQuery();
        app(ExistingBusinessClassification::class)->constrain($query, $filters);
        $path = app(InvestmentGeography::class)->selection($filters);
        if ($path !== []) {
            $territoryIds = app(InvestmentGeography::class)->descendants($path[array_key_last($path)]->id);
            $query->whereExists(fn ($locations) => $locations->selectRaw('1')->from('existing_business_locations as matching_location')
                ->whereColumn('matching_location.existing_business_id', 'existing_businesses.id')->where('matching_location.is_public', true)
                ->where(function ($match) use ($territoryIds): void {
                    foreach (['province_id', 'district_id', 'admin_post_id', 'locality_id'] as $field) {
                        $match->orWhereIn('matching_location.'.$field, $territoryIds);
                    }
                }));
        }
        if (! empty($filters['q'])) {
            $term = trim($filters['q']);
            $query->where(fn (Builder $builder) => $builder->whereLike('existing_businesses.public_title', '%'.$term.'%')
                ->orWhereLike('existing_businesses.activity_code', '%'.$term.'%')
                ->orWhereLike('existing_businesses.objective', '%'.$term.'%'));
        }
        if (! empty($filters['sector'])) {
            $query->where('existing_businesses.sector_id', $filters['sector']);
        }
        if (! empty($filters['modality'])) {
            $query->where('existing_businesses.modality', $filters['modality']);
        }

        $results = PublicBusinessOpportunityResource::collection($query->paginate($filters['per_page'] ?? 12)->appends($filters));
        if ($request->expectsJson()) {
            return $results->response();
        }

        return Inertia::render('investment/business-marketplace', ['results' => $results, 'filters' => $filters, 'territorySelection' => $path,
            'classificationOptions' => app(OpportunityClassification::class)->options(),
            'authorities' => DB::table('authorities')->where('status', 'published')->orderBy('label_pt_mz')->get(['id', 'label_pt_mz'])]);
    }

    private function filters(Request $request): array
    {
        return $request->validate([
            'q' => ['nullable', 'string', 'max:120'],
            'modality' => ['nullable', Rule::in(ExistingBusinessDrafts::MODALITIES)],
            'sector' => ['nullable', 'integer', 'min:1'],
            'per_page' => ['nullable', 'integer', 'min:1', 'max:50'],
            'province_id' => ['nullable', 'uuid'], 'district_id' => ['nullable', 'uuid'],
            'admin_post_id' => ['nullable', 'uuid'], 'locality_id' => ['nullable', 'uuid'],
            ...app(ExistingBusinessClassification::class)->filterRules(),
        ]);
    }

    public function show(Request $request, string $slug): Response|JsonResponse
    {
        $record = $this->publishedQuery()->where('existing_businesses.public_slug', $slug)->firstOrFail();
        $resource = new PublicBusinessOpportunityResource($record);
        if ($request->expectsJson()) {
            return $resource->response();
        }

        $returnFilters = $this->filters($request);

        return Inertia::render('investment/business-opportunity', ['record' => $resource->resolve($request),
            'returnUrl' => $returnFilters === [] ? '/negocios' : '/negocios?'.http_build_query($returnFilters),
            'interestUrl' => '/negocios/'.rawurlencode($slug).'/manifestar-interesse'.($returnFilters === [] ? '' : '?'.http_build_query($returnFilters))]);
    }

    public function interest(Request $request, string $slug): Response
    {
        $record = $this->publishedQuery()->where('existing_businesses.public_slug', $slug)->firstOrFail();

        $returnFilters = $this->filters($request);

        return Inertia::render('investment/business-interest', [
            'record' => (new PublicBusinessOpportunityResource($record))->resolve($request),
            'modalities' => ExistingBusinessDrafts::MODALITIES,
            'countries' => app(CountryCatalogue::class)->all(),
            'returnUrl' => $returnFilters === [] ? '/negocios' : '/negocios?'.http_build_query($returnFilters),
        ]);
    }

    /** @return Builder<ExistingBusiness> */
    private function publishedQuery(): Builder
    {
        $publicLocations = DB::table('existing_business_locations as locations')
            ->leftJoin('geo_locations as province', 'province.id', '=', 'locations.province_id')
            ->leftJoin('geo_locations as district', 'district.id', '=', 'locations.district_id')
            ->leftJoin('geo_locations as locality', 'locality.id', '=', 'locations.locality_id')
            ->where('locations.is_public', true)->where('locations.is_primary', true)
            ->whereNull('province.deleted_at')->whereNull('district.deleted_at')->whereNull('locality.deleted_at')
            ->select('locations.existing_business_id', 'province.name as province')
            ->selectRaw("CASE WHEN locations.precision_level IN ('district','admin_post','locality','exact') THEN district.name ELSE NULL END AS district")
            ->selectRaw('NULL::text AS locality');

        return ExistingBusiness::query()->published()->with('sector:id,name,slug')
            ->leftJoinSub($publicLocations, 'public_location', 'public_location.existing_business_id', '=', 'existing_businesses.id')
            ->select(['existing_businesses.id', 'existing_businesses.public_slug', 'existing_businesses.public_title', 'existing_businesses.modality',
                'existing_businesses.activity_code', 'existing_businesses.stage', 'existing_businesses.objective',
                'existing_businesses.currency', 'existing_businesses.amount_min', 'existing_businesses.amount_max',
                'existing_businesses.available_percentage', 'existing_businesses.published_at', 'existing_businesses.sector_id',
                'existing_businesses.owner_user_id', 'existing_businesses.organization_id', 'existing_businesses.version_no', 'existing_businesses.expires_at', 'existing_businesses.status', 'existing_businesses.modality',
                'public_location.province', 'public_location.district', 'public_location.locality']);
    }
}