<?php
declare(strict_types=1);

require_once __DIR__ . '/service.php';

function market_management_mcp_token(array $env): string
{
    $token = env_value('MARKET_MCP_TOKEN', $env);
    if ($token === '') {
        throw new RuntimeException('MARKET_MCP_TOKEN ist nicht konfiguriert.');
    }
    return $token;
}

function market_management_mcp_authorize(array $env): string
{
    $header = (string) ($_SERVER['HTTP_AUTHORIZATION'] ?? '');
    if (!preg_match('/^Bearer\s+(.+)$/i', trim($header), $matches)) {
        throw new RuntimeException('Bearer-Token fehlt.');
    }

    $token = trim($matches[1]);
    $expected = market_management_mcp_token($env);
    if ($token === '' || !hash_equals($expected, $token)) {
        throw new RuntimeException('Bearer-Token ist ungültig.');
    }

    return 'bearer:' . hash('sha256', $token);
}

function market_management_mcp_tools(): array
{
    $occurrenceProperties = [
        'status' => ['type' => 'string'], 'place' => ['type' => ['string', 'null']], 'address' => ['type' => ['string', 'null']],
        'municipality_reference_id' => ['type' => ['integer', 'null']], 'notes' => ['type' => ['string', 'null']],
        'registration_deadline' => ['type' => ['string', 'null'], 'format' => 'date'],
        'request_or_registration_date' => ['type' => ['string', 'null'], 'format' => 'date'],
        'confirmation_date' => ['type' => ['string', 'null'], 'format' => 'date'],
        'payment_deadline' => ['type' => ['string', 'null'], 'format' => 'date'],
        'payment_status' => ['type' => ['string', 'null'], 'enum' => ['paid', 'unpaid']],
        'payment_date' => ['type' => ['string', 'null'], 'format' => 'date'], 'paid_amount' => ['type' => ['number', 'null']],
        'payment_method_code' => ['type' => ['string', 'null']], 'stand_size' => ['type' => ['string', 'null']],
        'table_available' => ['type' => ['boolean', 'null']], 'table_rentable' => ['type' => ['boolean', 'null']],
        'own_table_required' => ['type' => ['boolean', 'null']], 'shelter_available' => ['type' => ['boolean', 'null']],
        'power_available' => ['type' => ['boolean', 'null']], 'water_available' => ['type' => ['boolean', 'null']],
        'lighting_available' => ['type' => ['boolean', 'null']], 'other_infrastructure' => ['type' => ['string', 'null']],
        'own_stand_requirements' => ['type' => ['string', 'null']], 'travel_address' => ['type' => ['string', 'null']],
        'travel_distance_km' => ['type' => ['number', 'null']], 'travel_duration_minutes' => ['type' => ['integer', 'null']],
        'parking_options' => ['type' => ['string', 'null']], 'delivery_access' => ['type' => ['string', 'null']],
        'direct_unload_possible' => ['type' => ['boolean', 'null']], 'storage_options' => ['type' => ['string', 'null']],
        'travel_notes' => ['type' => ['string', 'null']], 'cancellation_terms' => ['type' => ['string', 'null']],
        'revenue_share_terms' => ['type' => ['string', 'null']], 'other_participation_conditions' => ['type' => ['string', 'null']],
        'contract_folder_url' => ['type' => ['string', 'null'], 'format' => 'uri'],
        'organization_contact_id' => ['type' => ['integer', 'null']], 'contact_person_id' => ['type' => ['integer', 'null']],
        'contact_email' => ['type' => ['string', 'null'], 'format' => 'email'], 'contact_phone' => ['type' => ['string', 'null']],
    ];
    $dayProperties = [
        'date' => ['type' => 'string', 'format' => 'date'], 'observations' => ['type' => ['string', 'null']],
        'stand_start_time' => ['type' => ['string', 'null'], 'format' => 'time'], 'stand_end_time' => ['type' => ['string', 'null'], 'format' => 'time'],
        'setup_start_time' => ['type' => ['string', 'null'], 'format' => 'time'], 'setup_end_time' => ['type' => ['string', 'null'], 'format' => 'time'],
        'delivery_start_time' => ['type' => ['string', 'null'], 'format' => 'time'], 'delivery_end_time' => ['type' => ['string', 'null'], 'format' => 'time'],
        'inherit_from_first_day' => ['type' => ['boolean', 'null']],
    ];
    $searchProperties = [
        'search' => ['type' => 'string'], 'market_definition_id' => ['type' => 'integer'], 'category_id' => ['type' => 'integer'],
        'status' => ['type' => 'string'], 'place' => ['type' => 'string'], 'address' => ['type' => 'string'],
        'municipality_reference_id' => ['type' => 'integer'], 'date_from' => ['type' => 'string', 'format' => 'date'],
        'date_to' => ['type' => 'string', 'format' => 'date'], 'include_archived' => ['type' => 'boolean'],
        'sort' => ['type' => 'string'], 'sort_direction' => ['type' => 'string', 'enum' => ['asc', 'desc']],
        'limit' => ['type' => 'integer', 'minimum' => 1, 'maximum' => 100], 'offset' => ['type' => 'integer', 'minimum' => 0],
    ];
    return [
        ['name' => 'market_management.search_markets', 'description' => 'Märkte suchen', 'inputSchema' => ['type' => 'object', 'properties' => $searchProperties]],
        ['name' => 'market_management.search_occurrences', 'description' => 'Durchführungen suchen und auflisten', 'inputSchema' => ['type' => 'object', 'properties' => $searchProperties]],
        ['name' => 'market_management.get_market', 'description' => 'Markt mit Durchführungen lesen', 'inputSchema' => ['type' => 'object', 'required' => ['market_id'], 'properties' => ['market_id' => ['type' => 'integer'], 'include_archived' => ['type' => 'boolean']]]],
        ['name' => 'market_management.create_market', 'description' => 'Markt mit bestehender Kategorie und optionaler Website-URL anlegen', 'inputSchema' => ['type' => 'object', 'required' => ['name', 'category_id'], 'properties' => ['name' => ['type' => 'string'], 'category_id' => ['type' => 'integer'], 'website_url' => ['type' => ['string', 'null'], 'format' => 'uri']]]],
        ['name' => 'market_management.update_market', 'description' => 'Markt inklusive Website-URL ändern', 'inputSchema' => ['type' => 'object', 'required' => ['market_id'], 'properties' => ['market_id' => ['type' => 'integer'], 'name' => ['type' => 'string'], 'category_id' => ['type' => 'integer'], 'website_url' => ['type' => ['string', 'null'], 'format' => 'uri']]]],
        ['name' => 'market_management.archive_market', 'description' => 'Markt archivieren', 'inputSchema' => ['type' => 'object', 'required' => ['market_id'], 'properties' => ['market_id' => ['type' => 'integer']]]],
        ['name' => 'market_management.reactivate_market', 'description' => 'Markt reaktivieren', 'inputSchema' => ['type' => 'object', 'required' => ['market_id'], 'properties' => ['market_id' => ['type' => 'integer']]]],
        ['name' => 'market_management.list_categories', 'description' => 'Bestehende Kategorien lesen', 'inputSchema' => ['type' => 'object', 'properties' => []]],
        ['name' => 'market_management.list_reference_data', 'description' => 'Kategorien, Kantone und Gemeinden lesen', 'inputSchema' => ['type' => 'object', 'properties' => []]],
        ['name' => 'market_management.get_overview', 'description' => 'Marktübersicht mit serverseitigen Filtern lesen', 'inputSchema' => ['type' => 'object', 'properties' => $searchProperties]],
        ['name' => 'market_management.create_occurrence', 'description' => 'Durchführung mit mindestens einem Tag anlegen', 'inputSchema' => ['type' => 'object', 'required' => ['market_definition_id', 'days'], 'properties' => ['market_definition_id' => ['type' => 'integer'], 'status' => ['type' => 'string'], 'days' => ['type' => 'array', 'minItems' => 1, 'items' => ['type' => 'object', 'required' => ['date'], 'properties' => $dayProperties]] + $occurrenceProperties]]],
        ['name' => 'market_management.get_occurrence', 'description' => 'Durchführung mit Markt, Tagen und berechneten Verkaufsdaten lesen', 'inputSchema' => ['type' => 'object', 'required' => ['occurrence_id'], 'properties' => ['occurrence_id' => ['type' => 'integer'], 'include_archived' => ['type' => 'boolean']]]],
        ['name' => 'market_management.update_occurrence', 'description' => 'Durchführung ändern', 'inputSchema' => ['type' => 'object', 'required' => ['occurrence_id'], 'properties' => ['occurrence_id' => ['type' => 'integer']] + $occurrenceProperties]],
        ['name' => 'market_management.archive_occurrence', 'description' => 'Durchführung archivieren', 'inputSchema' => ['type' => 'object', 'required' => ['occurrence_id'], 'properties' => ['occurrence_id' => ['type' => 'integer']]]],
        ['name' => 'market_management.reactivate_occurrence', 'description' => 'Durchführung reaktivieren', 'inputSchema' => ['type' => 'object', 'required' => ['occurrence_id'], 'properties' => ['occurrence_id' => ['type' => 'integer']]]],
        ['name' => 'market_management.create_day', 'description' => 'Durchführungstag anlegen', 'inputSchema' => ['type' => 'object', 'required' => ['occurrence_id', 'date'], 'properties' => ['occurrence_id' => ['type' => 'integer']] + $dayProperties]],
        ['name' => 'market_management.update_day', 'description' => 'Durchführungstag ändern', 'inputSchema' => ['type' => 'object', 'required' => ['day_id'], 'properties' => ['day_id' => ['type' => 'integer']] + $dayProperties]],
        ['name' => 'market_management.delete_day', 'description' => 'Durchführungstag entfernen', 'inputSchema' => ['type' => 'object', 'required' => ['day_id'], 'properties' => ['day_id' => ['type' => 'integer']]]],
        ['name' => 'market_management.set_organizer', 'description' => 'Veranstalter einer Durchführung setzen', 'inputSchema' => ['type' => 'object', 'required' => ['occurrence_id', 'organization_contact_id', 'contact_person_id'], 'properties' => ['occurrence_id' => ['type' => 'integer'], 'organization_contact_id' => ['type' => 'integer'], 'contact_person_id' => ['type' => 'integer']]]],
        ['name' => 'market_management.delete_organizer', 'description' => 'Veranstalter einer Durchführung entfernen', 'inputSchema' => ['type' => 'object', 'required' => ['occurrence_id'], 'properties' => ['occurrence_id' => ['type' => 'integer']]]],
        ['name' => 'market_management.create_cost_item', 'description' => 'Kostenposition anlegen', 'inputSchema' => ['type' => 'object', 'required' => ['occurrence_id', 'cost_type', 'gross_amount', 'tax_status'], 'properties' => ['occurrence_id' => ['type' => 'integer'], 'cost_type' => ['type' => 'string'], 'description' => ['type' => ['string', 'null']], 'gross_amount' => ['type' => 'number'], 'tax_status' => ['type' => 'string', 'enum' => ['tax_free', 'taxable']], 'tax_rate' => ['type' => 'number']]]],
        ['name' => 'market_management.update_cost_item', 'description' => 'Kostenposition ändern', 'inputSchema' => ['type' => 'object', 'required' => ['cost_item_id'], 'properties' => ['cost_item_id' => ['type' => 'integer'], 'cost_type' => ['type' => 'string'], 'description' => ['type' => ['string', 'null']], 'gross_amount' => ['type' => ['number', 'null']], 'tax_status' => ['type' => ['string', 'null'], 'enum' => ['tax_free', 'taxable']], 'tax_rate' => ['type' => ['number', 'null']]]]],
        ['name' => 'market_management.delete_cost_item', 'description' => 'Kostenposition entfernen', 'inputSchema' => ['type' => 'object', 'required' => ['cost_item_id'], 'properties' => ['cost_item_id' => ['type' => 'integer']]]],
    ];
}

function market_management_mcp_is_write_tool(string $tool): bool
{
    return in_array($tool, [
        'market_management.create_market', 'market_management.update_market',
        'market_management.archive_market', 'market_management.reactivate_market',
        'market_management.create_occurrence', 'market_management.update_occurrence',
        'market_management.archive_occurrence', 'market_management.reactivate_occurrence',
        'market_management.create_day', 'market_management.update_day', 'market_management.delete_day',
        'market_management.set_organizer', 'market_management.delete_organizer',
        'market_management.create_cost_item', 'market_management.update_cost_item',
        'market_management.delete_cost_item',
    ], true);
}

function market_management_mcp_call_idempotent(PDO $pdo, string $userSubject, string $tool, array $arguments): array
{
    if (!market_management_mcp_is_write_tool($tool)) {
        return market_management_mcp_call($pdo, $tool, $arguments);
    }

    $idempotencyKey = trim((string) ($arguments['idempotency_key'] ?? ''));
    if ($idempotencyKey === '') {
        throw new InvalidArgumentException('Schreibende MCP-Aufrufe benötigen idempotency_key.');
    }
    $clientId = trim((string) ($arguments['client_id'] ?? 'hermes'));
    if ($clientId === '') {
        throw new InvalidArgumentException('client_id darf nicht leer sein.');
    }
    $businessArguments = $arguments;
    unset($businessArguments['idempotency_key'], $businessArguments['client_id']);
    $requestHash = hash('sha256', json_encode([
        'tool' => $tool,
        'arguments' => $businessArguments,
    ], JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES | JSON_THROW_ON_ERROR));

    $pdo->beginTransaction();
    try {
        $existingStmt = $pdo->prepare(
            'SELECT user_subject, request_hash, result_status, result_payload
             FROM market_mcp_idempotency
             WHERE client_id = :client_id AND idempotency_key = :idempotency_key
             FOR UPDATE'
        );
        $existingStmt->execute([':client_id' => $clientId, ':idempotency_key' => $idempotencyKey]);
        $existing = $existingStmt->fetch();
        if (is_array($existing)) {
            if ((string) $existing['user_subject'] !== $userSubject || (string) $existing['request_hash'] !== $requestHash) {
                throw new InvalidArgumentException('Idempotency-Schlüssel wurde bereits für eine andere Anfrage verwendet.');
            }
            if ((string) $existing['result_status'] === 'succeeded' && $existing['result_payload'] !== null) {
                $pdo->commit();
                return (array) json_decode((string) $existing['result_payload'], true, 512, JSON_THROW_ON_ERROR);
            }
            throw new RuntimeException('Idempotency-Anfrage wird bereits verarbeitet oder ist fehlgeschlagen.');
        }

        $insert = $pdo->prepare(
            'INSERT INTO market_mcp_idempotency
             (user_subject, client_id, idempotency_key, tool_name, request_hash, result_status, expires_at)
             VALUES (:user_subject, :client_id, :idempotency_key, :tool_name, :request_hash, \'processing\', NOW() + INTERVAL \'24 hours\')'
        );
        $insert->execute([
            ':user_subject' => $userSubject,
            ':client_id' => $clientId,
            ':idempotency_key' => $idempotencyKey,
            ':tool_name' => $tool,
            ':request_hash' => $requestHash,
        ]);
        $result = market_management_mcp_call($pdo, $tool, $businessArguments);
        $update = $pdo->prepare(
            'UPDATE market_mcp_idempotency
             SET result_status = \'succeeded\', result_payload = CAST(:result_payload AS JSONB)
             WHERE client_id = :client_id AND idempotency_key = :idempotency_key'
        );
        $update->execute([
            ':result_payload' => json_encode($result, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES | JSON_THROW_ON_ERROR),
            ':client_id' => $clientId,
            ':idempotency_key' => $idempotencyKey,
        ]);
        $pdo->commit();
        return $result;
    } catch (Throwable $e) {
        if ($pdo->inTransaction()) {
            $pdo->rollBack();
        }
        throw $e;
    }
}

function market_management_mcp_get_occurrence(PDO $pdo, int $occurrenceId, bool $includeArchived = false): array
{
    $occurrence = market_management_get_occurrence($pdo, $occurrenceId, $includeArchived);
    if ($occurrence === null) {
        throw new RuntimeException('Durchführung nicht gefunden.');
    }
    $market = market_management_get_market($pdo, (int) $occurrence['market_definition_id'], $includeArchived);
    if ($market === null) {
        throw new RuntimeException('Markt nicht gefunden.');
    }
    unset($market['occurrences']);
    $occurrence['market'] = $market;
    return $occurrence;
}

function market_management_mcp_get_market(PDO $pdo, int $marketId, bool $includeArchived = false): array
{
    $market = market_management_get_market($pdo, $marketId, $includeArchived);
    if ($market === null) {
        throw new RuntimeException('Markt nicht gefunden.');
    }
    foreach ($market['occurrences'] as $index => $occurrence) {
        $enriched = market_management_get_occurrence($pdo, (int) $occurrence['id'], $includeArchived);
        if ($enriched !== null) {
            $market['occurrences'][$index] = $enriched;
        }
    }
    return $market;
}

function market_management_mcp_update_occurrence(PDO $pdo, int $occurrenceId, array $input): array
{
    $contactFields = [];
    foreach (['contact_email', 'contact_phone'] as $field) {
        if (array_key_exists($field, $input)) {
            $contactFields[substr($field, 8)] = $input[$field];
            unset($input[$field]);
        }
    }
    $organizerFields = [];
    foreach (['organization_contact_id', 'contact_person_id'] as $field) {
        if (array_key_exists($field, $input)) {
            $organizerFields[$field] = $input[$field];
            unset($input[$field]);
        }
    }
    $existing = null;
    if ($contactFields !== [] || $organizerFields !== []) {
        $existing = market_management_get_occurrence($pdo, $occurrenceId, true);
        if ($existing === null) {
            throw new RuntimeException('Durchführung nicht gefunden.');
        }
    }
    if ($organizerFields !== []) {
        $organizer = $existing['organizer'] ?? [];
        $organizerFields['occurrence_id'] = $occurrenceId;
        $organizerFields['organization_contact_id'] ??= $organizer['organization_contact_id'] ?? null;
        $organizerFields['contact_person_id'] ??= $organizer['contact_person_id'] ?? null;
        market_management_set_organizer($pdo, $organizerFields);
    }
    if ($contactFields !== []) {
        $contactId = (int) ($organizerFields['contact_person_id'] ?? $existing['contact_person_id'] ?? 0);
        $hasContactValue = array_reduce($contactFields, static fn (bool $carry, mixed $value): bool => $carry || trim((string) $value) !== '', false);
        if ($contactId > 0 && ($hasContactValue || array_key_exists('contact_person_id', $organizerFields))) {
            update_contact_details($pdo, $contactId, $contactFields);
        } elseif ($hasContactValue) {
            throw new InvalidArgumentException('Für E-Mail oder Telefon muss eine Kontaktperson ausgewählt sein.');
        }
    }
    if ($input !== []) {
        market_management_update_occurrence($pdo, $occurrenceId, $input);
    }
    return market_management_mcp_get_occurrence($pdo, $occurrenceId, true);
}

function market_management_mcp_call(PDO $pdo, string $tool, array $arguments): array
{
    return match ($tool) {
        'market_management.search_markets' => market_management_search_markets($pdo, $arguments),
        'market_management.search_occurrences' => market_management_search_occurrences($pdo, $arguments),
        'market_management.get_market' => market_management_mcp_get_market(
            $pdo,
            market_management_require_positive_id($arguments['market_id'] ?? null, 'market_id'),
            (bool) ($arguments['include_archived'] ?? false)
        ),
        'market_management.create_market' => market_management_create_market($pdo, $arguments),
        'market_management.update_market' => market_management_update_market(
            $pdo,
            market_management_require_positive_id($arguments['market_id'] ?? null, 'market_id'),
            $arguments
        ),
        'market_management.archive_market' => market_management_set_market_archive(
            $pdo,
            market_management_require_positive_id($arguments['market_id'] ?? null, 'market_id'),
            true
        ),
        'market_management.reactivate_market' => market_management_set_market_archive(
            $pdo,
            market_management_require_positive_id($arguments['market_id'] ?? null, 'market_id'),
            false
        ),
        'market_management.list_categories' => market_management_list_categories($pdo),
        'market_management.list_reference_data' => market_management_list_reference_data($pdo, $arguments),
        'market_management.get_overview' => [
            'markets' => market_management_search_markets($pdo, $arguments),
            'occurrences' => market_management_search_occurrences($pdo, $arguments),
        ],
        'market_management.create_occurrence' => market_management_create_occurrence($pdo, $arguments),
        'market_management.get_occurrence' => market_management_mcp_get_occurrence(
            $pdo,
            market_management_require_positive_id($arguments['occurrence_id'] ?? null, 'occurrence_id'),
            (bool) ($arguments['include_archived'] ?? false)
        ),
        'market_management.update_occurrence' => market_management_mcp_update_occurrence(
            $pdo,
            market_management_require_positive_id($arguments['occurrence_id'] ?? null, 'occurrence_id'),
            $arguments
        ),
        'market_management.archive_occurrence' => market_management_set_occurrence_archive(
            $pdo,
            market_management_require_positive_id($arguments['occurrence_id'] ?? null, 'occurrence_id'),
            true
        ),
        'market_management.reactivate_occurrence' => market_management_set_occurrence_archive(
            $pdo,
            market_management_require_positive_id($arguments['occurrence_id'] ?? null, 'occurrence_id'),
            false
        ),
        'market_management.create_day' => market_management_create_day($pdo, $arguments),
        'market_management.update_day' => market_management_update_day(
            $pdo,
            market_management_require_positive_id($arguments['day_id'] ?? null, 'day_id'),
            $arguments
        ),
        'market_management.delete_day' => market_management_delete_day(
            $pdo,
            market_management_require_positive_id($arguments['day_id'] ?? null, 'day_id')
        ),
        'market_management.set_organizer' => market_management_set_organizer($pdo, $arguments),
        'market_management.delete_organizer' => market_management_delete_organizer(
            $pdo,
            market_management_require_positive_id($arguments['occurrence_id'] ?? null, 'occurrence_id')
        ),
        'market_management.create_cost_item' => market_management_create_cost_item($pdo, $arguments),
        'market_management.update_cost_item' => market_management_update_cost_item(
            $pdo,
            market_management_require_positive_id($arguments['cost_item_id'] ?? null, 'cost_item_id'),
            $arguments
        ),
        'market_management.delete_cost_item' => market_management_delete_cost_item(
            $pdo,
            market_management_require_positive_id($arguments['cost_item_id'] ?? null, 'cost_item_id')
        ),
        default => throw new InvalidArgumentException('Unbekanntes MCP-Tool: ' . $tool),
    };
}