from pgtoolkit.toolbase import SimpleTool
from pgtoolkit import pgbrowser


class AnalyzeAllTool(SimpleTool):

    """
    Analyze/vacuum all tables in selected schemas.

    Partially emulates VACUUM ANALYZE VERBOSE query.
    But this program is more configurable, skips pg_catalog etc.

    """

    def __init__(self):
        SimpleTool.__init__(self, name='analyzeall')
        self.target_isolation_level = 'autocommit'

    def specify_args(self):
        SimpleTool.specify_args(self)
        self.parser.add_argument('-s', dest='schema', nargs='*', help='Schema filter')
        self.parser.add_argument('--vacuum', action='store_true', help='Call VACUUM ANALYZE')
        self.parser.add_argument('--vacuum-full', action='store_true', help='Call VACUUM FULL ANALYZE')
        self.parser.add_argument('--reindex', action='store_true', help='Call REINDEX TABLE')

    def main(self):
        browser = pgbrowser.PgBrowser(self.pgm.get_conn('target'))

        query_patterns = ['ANALYZE %s.%s;']
        if self.args.vacuum:
            query_patterns = ['VACUUM ANALYZE %s.%s;']
        if self.args.vacuum_full:
            query_patterns = ['VACUUM FULL ANALYZE %s.%s;']
        if self.args.reindex:
            query_patterns += ['REINDEX TABLE %s.%s;']

        schema_list = self.args.schema
        if not schema_list:
            schema_list = [schema['name'] for schema in browser.list_schemas() if not schema['system']]

        for schema in schema_list:
            tables = browser.list_tables(schema=schema)
            with self.pgm.cursor('target') as curs:
                for table in tables:
                    for query_pattern in query_patterns:
                        query = query_pattern % (schema, table['name'])
                        self.log.info(query)
                        curs.execute(query, [])


cls = AnalyzeAllTool