import logging

import schemas
from chalicelib.core import countries, metadata
from chalicelib.utils import ch_client
from chalicelib.utils import helper, exp_ch_helper

logger = logging.getLogger(__name__)
TABLE = "experimental.autocomplete"


def __get_autocomplete_table(value, project_id):
    autocomplete_events = [schemas.FilterType.REV_ID,
                           schemas.EventType.CLICK,
                           schemas.FilterType.USER_DEVICE,
                           schemas.FilterType.USER_ID,
                           schemas.FilterType.USER_BROWSER,
                           schemas.FilterType.USER_OS,
                           schemas.EventType.CUSTOM,
                           schemas.FilterType.USER_COUNTRY,
                           schemas.FilterType.USER_CITY,
                           schemas.FilterType.USER_STATE,
                           schemas.EventType.LOCATION,
                           schemas.EventType.INPUT]
    autocomplete_events.sort()
    sub_queries = []
    c_list = []
    for e in autocomplete_events:
        if e == schemas.FilterType.USER_COUNTRY:
            c_list = countries.get_country_code_autocomplete(value)
            if len(c_list) > 0:
                sub_queries.append(f"""(SELECT DISTINCT ON(value) '{e.value}' AS _type, value
                                        FROM {TABLE}
                                        WHERE project_id = %(project_id)s
                                            AND type= '{e.value.upper()}' 
                                            AND value IN %(c_list)s)""")
            continue
        sub_queries.append(f"""(SELECT '{e.value}' AS _type, value
                                FROM {TABLE}
                                WHERE project_id = %(project_id)s
                                    AND type= '{e.value.upper()}' 
                                    AND value ILIKE %(svalue)s
                                ORDER BY value
                                LIMIT 5)""")
        if len(value) > 2:
            sub_queries.append(f"""(SELECT '{e.value}' AS _type, value
                                    FROM {TABLE}
                                    WHERE project_id = %(project_id)s
                                        AND type= '{e.value.upper()}' 
                                        AND value ILIKE %(value)s
                                    ORDER BY value
                                    LIMIT 5)""")
    with ch_client.ClickHouseClient() as cur:
        query = " UNION DISTINCT ".join(sub_queries) + ";"
        params = {"project_id": project_id,
                  "value": helper.string_to_sql_like(value),
                  "svalue": helper.string_to_sql_like("^" + value),
                  "c_list": tuple(c_list)}
        results = []
        try:
            results = cur.execute(query=query, parameters=params)
        except Exception as err:
            logger.exception("--------- CH AUTOCOMPLETE SEARCH QUERY EXCEPTION -----------")
            logger.exception(cur.format(query=query, parameters=params))
            logger.exception("--------- PARAMS -----------")
            logger.exception(params)
            logger.exception("--------- VALUE -----------")
            logger.exception(value)
            logger.exception("--------------------")
            raise err
    for r in results:
        r["type"] = r.pop("_type")
    results = helper.list_to_camel_case(results)
    return results


def __generic_query(typename, value_length=None):
    if typename == schemas.FilterType.USER_COUNTRY:
        return f"""SELECT DISTINCT value, type
                    FROM {TABLE}
                    WHERE
                      project_id = %(project_id)s
                      AND type='{typename.upper()}'
                      AND value IN %(value)s
                      ORDER BY value"""

    if value_length is None or value_length > 2:
        return f"""SELECT DISTINCT ON(value, type) value, type
                   FROM ((SELECT DISTINCT value, type
                    FROM {TABLE}
                    WHERE
                      project_id = %(project_id)s
                      AND type='{typename.upper()}'
                      AND value ILIKE %(svalue)s
                      ORDER BY value
                    LIMIT 5)
                    UNION DISTINCT
                    (SELECT DISTINCT value, type
                    FROM {TABLE}
                    WHERE
                      project_id = %(project_id)s
                      AND type='{typename.upper()}'
                      AND value ILIKE %(value)s
                      ORDER BY value
                    LIMIT 5)) AS raw;"""
    return f"""SELECT DISTINCT value, type
                FROM {TABLE}
                WHERE
                  project_id = %(project_id)s
                  AND type='{typename.upper()}'
                  AND value ILIKE %(svalue)s
                  ORDER BY value
                LIMIT 10;"""


def __generic_autocomplete(event: str):
    def f(project_id, value, key=None, source=None):
        with ch_client.ClickHouseClient() as cur:
            query = __generic_query(event.ui_type, value_length=len(value))
            params = {"project_id": project_id, "value": helper.string_to_sql_like(value),
                      "svalue": helper.string_to_sql_like("^" + value)}
            results = cur.execute(query=query, parameters=params)
            return helper.list_to_camel_case(results)

    return f


def generic_autocomplete_metas(typename):
    def f(project_id, text):
        with ch_client.ClickHouseClient() as cur:
            params = {"project_id": project_id, "value": helper.string_to_sql_like(text),
                      "svalue": helper.string_to_sql_like("^" + text)}

            if typename == schemas.FilterType.USER_COUNTRY:
                params["value"] = tuple(countries.get_country_code_autocomplete(text))
                if len(params["value"]) == 0:
                    return []

            query = __generic_query(typename, value_length=len(text))
            rows = cur.execute(query=query, parameters=params)
        return rows

    return f


def __pg_errors_query(source=None, value_length=None):
    MAIN_TABLE = exp_ch_helper.get_main_js_errors_sessions_table()
    if value_length is None or value_length > 2:
        return f"""((SELECT DISTINCT ON(message)
                        message AS value,
                        source,
                        '{schemas.EventType.ERROR}' AS type
                    FROM {MAIN_TABLE}
                    WHERE
                      project_id = %(project_id)s
                      AND message ILIKE %(svalue)s
                      AND event_type = 'ERROR'
                      {"AND source = %(source)s" if source is not None else ""}
                    LIMIT 5)
                    UNION DISTINCT
                    (SELECT DISTINCT ON(name)
                        name AS value,
                        source,
                        '{schemas.EventType.ERROR}' AS type
                    FROM {MAIN_TABLE}
                    WHERE
                      project_id = %(project_id)s
                      AND name ILIKE %(svalue)s
                      {"AND source = %(source)s" if source is not None else ""}
                    LIMIT 5)
                    UNION DISTINCT
                    (SELECT DISTINCT ON(message)
                        message AS value,
                        source,
                        '{schemas.EventType.ERROR}' AS type
                    FROM {MAIN_TABLE}
                    WHERE
                      project_id = %(project_id)s
                      AND message ILIKE %(value)s
                      {"AND source = %(source)s" if source is not None else ""}
                    LIMIT 5)
                    UNION DISTINCT
                    (SELECT DISTINCT ON(name)
                        name AS value,
                        source,
                        '{schemas.EventType.ERROR}' AS type
                    FROM {MAIN_TABLE}
                    WHERE
                      project_id = %(project_id)s
                      AND name ILIKE %(value)s
                      {"AND source = %(source)s" if source is not None else ""}
                    LIMIT 5));"""
    return f"""((SELECT DISTINCT ON(message)
                    message AS value,
                    source,
                    '{schemas.EventType.ERROR}' AS type
                FROM {MAIN_TABLE}
                WHERE
                  project_id = %(project_id)s
                  AND message ILIKE %(svalue)s
                  {"AND source = %(source)s" if source is not None else ""}
                LIMIT 5)
                UNION DISTINCT
                (SELECT DISTINCT ON(name)
                    name AS value,
                    source,
                    '{schemas.EventType.ERROR}' AS type
                FROM {MAIN_TABLE}
                WHERE
                  project_id = %(project_id)s
                  AND name ILIKE %(svalue)s
                  {"AND source = %(source)s" if source is not None else ""}
                LIMIT 5));"""


def __search_errors(project_id, value, key=None, source=None):
    with ch_client.ClickHouseClient() as cur:
        query = cur.format(__pg_errors_query(source,
                                             value_length=len(value)),
                           {"project_id": project_id, "value": helper.string_to_sql_like(value),
                            "svalue": helper.string_to_sql_like("^" + value),
                            "source": source})
        results = cur.execute(query)
    return helper.list_to_camel_case(results)


def __search_errors_mobile(project_id, value, key=None, source=None):
    # TODO: define this when ios events are supported in CH
    return []


def __search_metadata(project_id, value, key=None, source=None):
    meta_keys = metadata.get(project_id=project_id)
    meta_keys = {m["key"]: m["index"] for m in meta_keys}
    if len(meta_keys) == 0 or key is not None and key not in meta_keys.keys():
        return []
    sub_from = []
    if key is not None:
        meta_keys = {key: meta_keys[key]}

    for k in meta_keys.keys():
        colname = metadata.index_to_colname(meta_keys[k])
        if len(value) > 2:
            sub_from.append(f"""((SELECT DISTINCT ON ({colname}) {colname} AS value, '{k}' AS key 
                                FROM {exp_ch_helper.get_main_sessions_table()} 
                                WHERE project_id = %(project_id)s 
                                AND {colname} ILIKE %(svalue)s LIMIT 5)
                                UNION DISTINCT
                                (SELECT DISTINCT ON ({colname}) {colname} AS value, '{k}' AS key 
                                FROM {exp_ch_helper.get_main_sessions_table()} 
                                WHERE project_id = %(project_id)s 
                                AND {colname} ILIKE %(value)s LIMIT 5))
                                """)
        else:
            sub_from.append(f"""(SELECT DISTINCT ON ({colname}) {colname} AS value, '{k}' AS key 
                                FROM {exp_ch_helper.get_main_sessions_table()} 
                                WHERE project_id = %(project_id)s
                                AND {colname} ILIKE %(svalue)s LIMIT 5)""")
    with ch_client.ClickHouseClient() as cur:
        query = cur.format(query=f"""SELECT DISTINCT ON(key, value) key, value, 'METADATA' AS TYPE
                                FROM({" UNION ALL ".join(sub_from)}) AS all_metas
                                LIMIT 5;""",
                           parameters={"project_id": project_id, "value": helper.string_to_sql_like(value),
                                       "svalue": helper.string_to_sql_like("^" + value)})
        results = cur.execute(query)
    return helper.list_to_camel_case(results)


TYPE_TO_COLUMN = {
    schemas.EventType.CLICK: "`$properties`.label",
    schemas.EventType.INPUT: "`$properties`.label",
    schemas.EventType.LOCATION: "`$properties`.url_path",
    schemas.EventType.CUSTOM: "`$properties`.name",
    schemas.FetchFilterType.FETCH_URL: "`$properties`.url_path",
    schemas.GraphqlFilterType.GRAPHQL_NAME: "`$properties`.name",
    schemas.EventType.STATE_ACTION: "`$properties`.name",
    # For ERROR, sessions search is happening over name OR message,
    # for simplicity top 10 is using name only
    schemas.EventType.ERROR: "`$properties`.name",
    schemas.FilterType.USER_COUNTRY: "user_country",
    schemas.FilterType.USER_CITY: "user_city",
    schemas.FilterType.USER_STATE: "user_state",
    schemas.FilterType.USER_ID: "user_id",
    schemas.FilterType.USER_ANONYMOUS_ID: "user_anonymous_id",
    schemas.FilterType.USER_OS: "user_os",
    schemas.FilterType.USER_BROWSER: "user_browser",
    schemas.FilterType.USER_DEVICE: "user_device",
    schemas.FilterType.PLATFORM: "platform",
    schemas.FilterType.REV_ID: "rev_id",
    schemas.FilterType.REFERRER: "referrer",
    schemas.FilterType.UTM_SOURCE: "utm_source",
    schemas.FilterType.UTM_MEDIUM: "utm_medium",
    schemas.FilterType.UTM_CAMPAIGN: "utm_campaign",
}


def is_top_supported(event_type):
    return TYPE_TO_COLUMN.get(event_type, False)


def get_top_values(project_id, event_type, event_key=None):
    with ch_client.ClickHouseClient() as cur:
        if schemas.FilterType.has_value(event_type):
            if event_type == schemas.FilterType.METADATA \
                    and (event_key is None \
                         or (colname := metadata.get_colname_by_key(project_id=project_id, key=event_key)) is None) \
                    or event_type != schemas.FilterType.METADATA \
                    and (colname := TYPE_TO_COLUMN.get(event_type)) is None:
                return []

            query = f"""WITH raw AS (SELECT DISTINCT {colname} AS c_value,
                                                     COUNT(1) OVER (PARTITION BY {colname}) AS row_count,
                                                     COUNT(1) OVER () AS total_count
                                     FROM experimental.sessions
                                     WHERE project_id = %(project_id)s
                                       AND isNotNull(c_value)
                                       AND notEmpty(c_value)
                                     ORDER BY row_count DESC
                                     LIMIT 10)
                        SELECT c_value AS value, row_count, truncate(row_count * 100 / total_count, 2) AS row_percentage
                        FROM raw;"""
        else:
            colname = TYPE_TO_COLUMN.get(event_type)
            event_type = exp_ch_helper.get_event_type(event_type)
            query = f"""WITH raw AS (SELECT DISTINCT {colname} AS c_value,
                                                     COUNT(1) OVER (PARTITION BY c_value) AS row_count,
                                                     COUNT(1) OVER ()                   AS total_count
                                     FROM product_analytics.events
                                     WHERE project_id = %(project_id)s
                                       AND `$event_name` = '{event_type}'
                                       AND isNotNull(c_value)
                                       AND notEmpty(c_value)
                                     ORDER BY row_count DESC
                                     LIMIT 10)
                        SELECT c_value AS value, row_count, truncate(row_count * 100 / total_count,2) AS row_percentage
                        FROM raw;"""
        params = {"project_id": project_id}
        results = cur.execute(query=query, parameters=params)
        return helper.list_to_camel_case(results)