import type {CloudProvider, FieldSchema, ServiceSchema, TableColumnSchema} from './types'

/**
 * Glue's rule for database and table names. Glue lowercases them, and Athena
 * needs them to start with a letter or underscore to query them unquoted.
 */
export const CATALOG_NAME_PATTERN = '^[a-z_][a-z0-9_]{0,254}$'
/** The data formats TheCloud's Athena engine reads from a table's S3 location. */
export const CATALOG_TABLE_FORMATS = ['csv', 'json', 'parquet'] as const
/** Hive column types Athena understands and the console offers. */
export const CATALOG_COLUMN_TYPES = ['string', 'int', 'bigint', 'double', 'float', 'boolean', 'date', 'timestamp', 'decimal(10,2)'] as const

const databaseColumns: TableColumnSchema[] = [
    {name: 'name', label: 'Name'},
    {name: 'tables', label: 'Tables', path: 'metadata.tableCount', emptyText: '—'},
    {name: 'description', label: 'Description', path: 'metadata.description', emptyText: '—'},
    {name: 'location', label: 'Location', path: 'metadata.locationUri', emptyText: '—'},
    {name: 'createdAt', label: 'Created', format: 'datetime'},
]

const databaseFilters: FieldSchema[] = [{name: 'search', label: 'Search', type: 'text', required: false}]

export function awsDataCatalogSchema(): ServiceSchema {
    return {
        cloud: 'aws',
        service: 'datacatalog',
        displayName: 'Glue Data Catalog databases',
        fields: [
            {
                name: 'name',
                label: 'Name',
                type: 'text',
                required: true,
                description: 'Lowercase letters, numbers and underscores, starting with a letter or underscore, so Athena can query it.',
                validation: {pattern: CATALOG_NAME_PATTERN, message: 'Use lowercase letters, numbers and underscores, starting with a letter or underscore'},
            },
            {name: 'description', label: 'Description', type: 'text', required: false, validation: {maxLength: 2048}},
            {
                name: 'locationUri',
                label: 'Location',
                type: 'text',
                required: false,
                span: true,
                description: 'Optional S3 location for the database, such as s3://my-bucket/warehouse/.',
                validation: {pattern: '^s3://[a-z0-9.-]{3,63}(/.*)?$', message: 'Use an S3 URI such as s3://my-bucket/warehouse/'},
            },
        ],
        actions: ['list', 'create', 'delete', 'inspect'],
        capabilities: {
            resourceActions: [
                {name: 'list', label: 'List databases', enabled: true, status: 'available', runtimeRequired: true},
                {name: 'create', label: 'Create database', enabled: true, status: 'available', runtimeRequired: true},
                {name: 'delete', label: 'Delete database', enabled: true, status: 'available', runtimeRequired: true},
                {name: 'inspect', label: 'Inspect database', enabled: true, status: 'available', runtimeRequired: true},
            ],
            dataCatalogActions: [
                {name: 'createTable', label: 'Create table', enabled: true, status: 'available', runtimeRequired: true},
                {name: 'deleteTable', label: 'Delete table', enabled: true, status: 'available', runtimeRequired: true},
            ],
        },
        filters: databaseFilters,
        columns: databaseColumns,
    }
}

export function dataCatalogSchemaFor(cloud: CloudProvider): ServiceSchema | null {
    return cloud === 'aws' ? awsDataCatalogSchema() : null
}