<?php

declare(strict_types=1);

function handleGetItemTemplates(PDO $pdo): void
{
    $stmt = $pdo->query(
        'SELECT id, name, description, default_price, category
        FROM item_templates ORDER BY category, name'
    );
    successResponse(['templates' => $stmt->fetchAll()]);
}

function handleSaveItemTemplate(PDO $pdo): void
{
    $input = getJsonInput();

    if (empty($input['name'])) {
        errorResponse('Název šablony je povinný');
    }

    $id = isset($input['id']) ? (int)$input['id'] : null;

    if ($id) {
        // Update
        $stmt = $pdo->prepare('
            UPDATE item_templates SET
                name = ?, description = ?, default_price = ?, category = ?,
                modified_at = NOW(), sync_version = sync_version + 1
            WHERE id = ?
        ');
        $stmt->execute([
            $input['name'],
            $input['description'] ?? '',
            $input['default_price'] ?? 0,
            $input['category'] ?? '',
            $id,
        ]);
        successResponse(null, 'Šablona byla aktualizována');
    } else {
        // Create
        $uuid = sprintf(
            '%04x%04x-%04x-%04x-%04x-%04x%04x%04x',
            random_int(0, 0xffff),
            random_int(0, 0xffff),
            random_int(0, 0xffff),
            random_int(0, 0x0fff) | 0x4000,
            random_int(0, 0x3fff) | 0x8000,
            random_int(0, 0xffff),
            random_int(0, 0xffff),
            random_int(0, 0xffff)
        );

        $stmt = $pdo->prepare('
            INSERT INTO item_templates (name, description, default_price, category, uuid, modified_at, sync_version)
            VALUES (?, ?, ?, ?, ?, NOW(), 1)
        ');
        $stmt->execute([
            $input['name'],
            $input['description'] ?? '',
            $input['default_price'] ?? 0,
            $input['category'] ?? '',
            $uuid,
        ]);
        $newId = (int)$pdo->lastInsertId();

        AuditLog::logCreate(
            'offers_item_template',
            (int)$newId,
            ['name' => $input['name']],
            "Vytvořena šablona položky '{$input['name']}'"
        );

        successResponse(['id' => $newId], 'Šablona byla vytvořena');
    }
}

function handleDeleteItemTemplate(PDO $pdo, int $id): void
{
    $stmt = $pdo->prepare('SELECT name FROM item_templates WHERE id = ?');
    $stmt->execute([$id]);
    $template = $stmt->fetch();

    if (!$template) {
        errorResponse('Šablona nebyla nalezena', 404);
    }

    $stmt = $pdo->prepare('DELETE FROM item_templates WHERE id = ?');
    $stmt->execute([$id]);


    AuditLog::logDelete(
        'offers_item_template',
        $id,
        ['name' => $template['name']],
        "Smazána šablona položky '{$template['name']}'"
    );

    successResponse(null, 'Šablona byla smazána');
}

// --- Scope Templates ---

function handleGetScopeTemplates(PDO $pdo): void
{
    $stmt = $pdo->query(
        'SELECT id, name, title, description FROM scope_templates ORDER BY name'
    );
    successResponse(['templates' => $stmt->fetchAll()]);
}

function handleGetScopeDetail(PDO $pdo, int $id): void
{
    $stmt = $pdo->prepare(
        'SELECT id, name, title, description FROM scope_templates WHERE id = ?'
    );
    $stmt->execute([$id]);
    $template = $stmt->fetch();

    if (!$template) {
        errorResponse('Šablona nebyla nalezena', 404);
    }

    $stmt = $pdo->prepare(
        'SELECT id, scope_template_id, position, title, title_cz, content
        FROM scope_template_sections WHERE scope_template_id = ? ORDER BY position'
    );
    $stmt->execute([$id]);
    $template['sections'] = $stmt->fetchAll();

    successResponse($template);
}

function handleSaveScopeTemplate(PDO $pdo): void
{
    $input = getJsonInput();

    if (empty($input['name'])) {
        errorResponse('Název šablony je povinný');
    }

    $id = isset($input['id']) ? (int)$input['id'] : null;
    $sections = $input['sections'] ?? [];

    $pdo->beginTransaction();
    try {
        if ($id) {
            // Update template
            $stmt = $pdo->prepare('
                UPDATE scope_templates SET
                    name = ?,
                    title = ?,
                    description = ?,
                    modified_at = NOW(),
                    sync_version = sync_version + 1
                WHERE id = ?
            ');
            $stmt->execute([
                $input['name'],
                $input['title'] ?? '',
                $input['description'] ?? '',
                $id,
            ]);
        } else {
            // Create template
            $uuid = sprintf(
                '%04x%04x-%04x-%04x-%04x-%04x%04x%04x',
                random_int(0, 0xffff),
                random_int(0, 0xffff),
                random_int(0, 0xffff),
                random_int(0, 0x0fff) | 0x4000,
                random_int(0, 0x3fff) | 0x8000,
                random_int(0, 0xffff),
                random_int(0, 0xffff),
                random_int(0, 0xffff)
            );

            $stmt = $pdo->prepare('
                INSERT INTO scope_templates (name, title, description, uuid, modified_at, sync_version)
                VALUES (?, ?, ?, ?, NOW(), 1)
            ');
            $stmt->execute([
                $input['name'],
                $input['title'] ?? '',
                $input['description'] ?? '',
                $uuid,
            ]);
            $id = (int)$pdo->lastInsertId();
        }

        // Delete existing sections and re-insert
        $stmt = $pdo->prepare('DELETE FROM scope_template_sections WHERE scope_template_id = ?');
        $stmt->execute([$id]);

        $stmt = $pdo->prepare('
            INSERT INTO scope_template_sections
                (scope_template_id, title, title_cz, content, position, uuid, modified_at, sync_version)
            VALUES (?, ?, ?, ?, ?, ?, NOW(), 1)
        ');

        foreach ($sections as $i => $section) {
            $sectionUuid = sprintf(
                '%04x%04x-%04x-%04x-%04x-%04x%04x%04x',
                random_int(0, 0xffff),
                random_int(0, 0xffff),
                random_int(0, 0xffff),
                random_int(0, 0x0fff) | 0x4000,
                random_int(0, 0x3fff) | 0x8000,
                random_int(0, 0xffff),
                random_int(0, 0xffff),
                random_int(0, 0xffff)
            );
            $stmt->execute([
                $id,
                $section['title'] ?? '',
                $section['title_cz'] ?? '',
                $section['content'] ?? '',
                $i + 1,
                $sectionUuid,
            ]);
        }

        $pdo->commit();

        AuditLog::logCreate(
            'offers_scope_template',
            $id,
            ['name' => $input['name']],
            "Uložena šablona rozsahu '{$input['name']}'"
        );

        successResponse(['id' => $id], 'Šablona rozsahu byla uložena');
    } catch (PDOException $e) {
        $pdo->rollBack();
        throw $e;
    }
}

function handleDeleteScopeTemplate(PDO $pdo, int $id): void
{
    $stmt = $pdo->prepare('SELECT name FROM scope_templates WHERE id = ?');
    $stmt->execute([$id]);
    $template = $stmt->fetch();

    if (!$template) {
        errorResponse('Šablona nebyla nalezena', 404);
    }

    $pdo->beginTransaction();
    try {
        // Delete sections
        $stmt = $pdo->prepare('DELETE FROM scope_template_sections WHERE scope_template_id = ?');
        $stmt->execute([$id]);

        // Delete template
        $stmt = $pdo->prepare('DELETE FROM scope_templates WHERE id = ?');
        $stmt->execute([$id]);

        $pdo->commit();

        AuditLog::logDelete(
            'offers_scope_template',
            $id,
            ['name' => $template['name']],
            "Smazána šablona rozsahu '{$template['name']}'"
        );

        successResponse(null, 'Šablona rozsahu byla smazána');
    } catch (PDOException $e) {
        $pdo->rollBack();
        throw $e;
    }
}