<?php

namespace App\Services;

use App\Models\User;
use App\Support\StructuredData;
use Illuminate\Support\Arr;

/** An identified opportunity within the authorised dossier, never the account's last choice. */
final class InvestmentConsumerScope
{
    /**
     * @param  array<array-key, mixed>  $context
     */
    public function key(array $context, ?string $key, bool $required = false): ?string
    {
        $choices = $context['opportunity_choices'] ?? [];
        $key = $key ?: (count($choices) === 1 ? $choices[0]['opportunity']['key'] : null);
        abort_if($key && ! collect(StructuredData::collectionItems($choices))->contains('opportunity.key', $key), 422, 'Escolha uma oportunidade deste dossier.');
        abort_if($required && count($choices) > 1 && ! $key, 422, 'Escolha a oportunidade em tratamento.');

        return $key;
    }

    /**
     * @param  array<array-key, mixed>  $context
     * @param  array<array-key, mixed>  $payload
     * @return array<array-key, mixed>
     */
    public function facts(array $payload, array $context, ?string $key): array
    {
        $key = $this->key($context, $key);
        $path = $payload['investor_path'] ?? [];
        $defaults = ['land_needed' => 'unknown', 'external_funding' => 'unknown', 'viability' => 'unknown'];
        // A dossier-wide dispensation cannot decide a distinct opportunity's needs.
        if ($key && count($context['opportunity_choices'] ?? []) > 1) {
            return [...$defaults, ...($path['opportunity_facts'][$key] ?? [])];
        }
        if ($key && isset($path['opportunity_facts'][$key])) {
            return [...$defaults, ...$path['opportunity_facts'][$key]];
        }
        if (count($context['opportunity_choices'] ?? []) > 1) {
            return $defaults;
        }

        return [...$defaults, ...($path['facts'] ?? [])];
    }

    /**
     * @param  array<array-key, mixed>  $context
     * @return array<array-key, mixed>
     */
    public function context(array $context, ?string $key): array
    {
        $choices = $context['opportunity_choices'] ?? [];
        $key = $this->key($context, $key);
        if (! $choices) {
            return $context;
        }
        $choice = $key ? collect(StructuredData::collectionItems($choices))->firstWhere('opportunity.key', $key) : null;
        abort_if($key && ! $choice, 422, 'Escolha uma oportunidade deste dossier.');
        $specific = ['project_summary', 'sector_id', 'sector', 'province_id', 'district_id', 'admin_post_id', 'locality_id', 'province', 'district', 'location', 'special_zone_id', 'investment_regime'];
        $context['fields'] = Arr::except($context['fields'], $specific);
        $context['provenance'] = Arr::except($context['provenance'] ?? [], $specific);
        $context['selection'] = Arr::except($context['selection'], ['opportunity', 'territory', 'park']);
        if (! $choice) {
            $context['opportunity_choices'] = [];
            $context['requirements_assessment']['requirements'] = [];

            return $context;
        }
        $context['selection']['opportunity'] = $choice['opportunity'];
        $context['fields'] = [...$context['fields'], ...Arr::only($choice['opportunity']['fields'], $specific)];
        foreach (Arr::only($choice['opportunity']['fields'], $specific) as $field => $value) {
            $context['provenance'][$field] = Arr::only($choice['opportunity'], ['key', 'kind', 'id', 'title', 'version', 'sha256']);
        }
        unset($context['selection']['sector']);
        if (! empty($context['fields']['sector_id'])) {
            $context['selection']['sector'] = app(InvestorContext::class)->reference('sector:'.$context['fields']['sector_id']);
        }
        if ($choice['territory']) {
            $context['selection']['territory'] = $choice['territory'];
            $context['fields'] = [...Arr::except($context['fields'], array_keys(InvestmentGeography::FIELDS)), ...$choice['territory']['fields']];
            foreach ($choice['territory']['fields'] as $field => $value) {
                $context['provenance'][$field] = Arr::only($choice['territory'], ['key', 'kind', 'id', 'title', 'version', 'sha256']);
            }
        } else {
            $context['fields'] = Arr::except($context['fields'], ['province_id', 'district_id', 'admin_post_id', 'locality_id', 'province', 'district', 'location']);
        }
        $park = $choice['park'] ?? null;
        if ($park) {
            $context['selection']['park'] = $park;
        }
        $context['fields']['special_zone_id'] = $park['id'] ?? '';
        $context['fields']['investment_regime'] = $park['fields']['investment_regime'] ?? 'general';
        $context['opportunity_choices'] = [$choice];
        $context['requirements_assessment']['requirements'] = array_values(array_filter($context['requirements_assessment']['requirements'] ?? [], fn ($r) => $r['opportunity_key'] === $key));
        $context['consumer_opportunity'] = $choice;
        $context['complements'] = array_values(array_filter($context['complements'] ?? [], fn ($c) => ($c['origin']['key'] ?? null) === $key || ($c['target']['key'] ?? null) === $key || in_array(substr($c['origin']['key'] ?? '', 10), array_column($choice['portfolio_origins'] ?? [], 'id'), true)));
        $context['dependency_hash'] = app(InvestorContext::class)->dependencyHash(['opportunity_choices' => [$choice], 'fields' => Arr::except($context['fields'], ['project_title', 'project_summary']), 'complements' => $context['complements']]);

        return $context;
    }

    /**
     * @param  array<array-key, mixed>  $payload
     * @return array<array-key, mixed>
     */
    public function bind(User $actor, string $id, array $payload, bool $required = false): array
    {
        $case = app(VirtualDesk::class)->case($actor, $id, true);
        $context = app(InvestorContext::class)->state($case);
        $scoped = $this->context($context, $payload['context_opportunity'] ?? null);
        $choice = $scoped['consumer_opportunity'] ?? null;
        abort_if($required && count($context['opportunity_choices'] ?? []) > 1 && ! $choice, 422, 'Escolha a oportunidade em tratamento antes de submeter.');
        if (! $choice) {
            return Arr::except($payload, ['context_opportunity', 'context_opportunity_snapshot']);
        }
        // Canonical server snapshot; client text cannot establish a different origin or territory.
        $payload['context_opportunity'] = $choice['opportunity']['key'];
        $payload['context_opportunity_snapshot'] = json_encode(['context_id' => $id, 'revision' => $context['revision'], 'choice' => $choice, 'requirements' => $scoped['requirements_assessment'] ?? null], JSON_THROW_ON_ERROR | JSON_UNESCAPED_UNICODE);

        return $payload;
    }
}