# -*- coding: UTF-8 -*-
import api
import config
import logging
import utils
import copy
import time

LOG_FORMAT = "%(asctime)s - %(levelname)s - %(message)s"
logging.basicConfig(format=LOG_FORMAT, level=logging.INFO)

def get_all_records(client: api.Client, access_token: str, app_token: str, table_id: str):
    records = []
    page_token = None
    while True:
        resp = client.get_records_list(access_token, app_token, table_id, page_token=page_token)
        items = resp.get('items', [])
        if items:
            records.extend(items)
        if resp.get('has_more'):
            page_token = resp.get('page_token')
        else:
            break
    return records


def get_all_fields(client: api.Client, access_token: str, app_token: str, table_id: str):
    fields = []
    page_token = None
    while True:
        resp = client.get_fields_list(access_token, app_token, table_id, page_token=page_token)
        items = resp.get('items', [])
        if items:
            fields.extend(items)
        if resp.get('has_more'):
            page_token = resp.get('page_token')
        else:
            break
    return fields


def get_all_tables(client: api.Client, access_token: str, app_token: str):
    tables = []
    page_token = None
    while True:
        resp = client.get_tables_list(access_token, app_token, page_token=page_token)
        items = resp.get('items', [])
        if items:
            tables.extend(items)
        if resp.get('has_more'):
            page_token = resp.get('page_token')
        else:
            break
    return tables


def copy_single_table(client: api.Client, access_token: str, source_app_token: str, source_table_id: str, target_app_token: str, table_name: str):
    logging.info(f"Copying table '{table_name}' ({source_table_id}) from {source_app_token} to {target_app_token}")
    
    fields = get_all_fields(client, access_token, source_app_token, source_table_id)
    
    # Create Target Table
    target_table_id = client.create_table(access_token, target_app_token, table_name)
    
    # Get initial default fields set by Feishu
    target_initial_fields = get_all_fields(client, access_token, target_app_token, target_table_id)
    initial_field_names = {f['field_name']: f['field_id'] for f in target_initial_fields}
    
    target_field_map = {}
    
    for f in fields:
        name = f['field_name']
        ftype = f['type']
        fprop = copy.deepcopy(f.get('property'))
        
        # Clean up IDs from options to avoid errors
        if fprop and 'options' in fprop:
            for opt in fprop['options']:
                if 'id' in opt:
                    del opt['id']

        if name in initial_field_names:
            field_id = initial_field_names[name]
            try:
                client.update_field(access_token, target_app_token, target_table_id, field_id, name, ftype, fprop)
                target_field_map[name] = field_id
            except utils.LarkException as e:
                logging.error(f"Failed to update default field '{name}': {e}")
        else:
            try:
                resp = client.add_field(access_token, target_app_token, target_table_id, name, ftype, fprop)
                target_field_map[name] = resp['field_id']
            except utils.LarkException as e:
                logging.error(f"Failed to create field '{name}': {e}")
                
    # Read Records from Source Table
    records = get_all_records(client, access_token, source_app_token, source_table_id)
    
    target_records = []
    for r in records:
        original_fields = r.get('fields', {})
        new_fields = {}
        for fname, fvalue in original_fields.items():
            if fname in target_field_map:
                new_fields[fname] = fvalue
        target_records.append({'fields': new_fields})
    
    CHUNK_SIZE = 500
    for i in range(0, len(target_records), CHUNK_SIZE):
        chunk = target_records[i:i + CHUNK_SIZE]
        if chunk:
            try:
                client.batch_create_records(access_token, target_app_token, target_table_id, chunk)
            except utils.LarkException as e:
                logging.error(f"Failed to insert chunk of records: {e}")
                
    logging.info(f"Successfully copied table '{table_name}' to {target_table_id}!")
    return target_table_id


def import_all_tables(client: api.Client, access_token: str, source_app_tokens: list, target_app_token: str):
    """
    Imports all tables from a list of source bitable Apps into the target App.
    """
    for source_app_token in source_app_tokens:
        logging.info(f"Fetching tables from source app: {source_app_token}")
        try:
            tables = get_all_tables(client, access_token, source_app_token)
            for table in tables:
                source_table_id = table['table_id']
                table_name = table['name']
                copy_single_table(client, access_token, source_app_token, source_table_id, target_app_token, table_name)
        except Exception as e:
            logging.error(f"Failed to copy tables from {source_app_token}: {e}")

if __name__ == "__main__":
    client = api.Client(config.LARK_HOST)
    
    try:
        access_token = client.get_tenant_access_token(config.APP_ID, config.APP_SECRET)
    except Exception as e:
        logging.error(f"Could not get access token: {e}")
        exit(1)
        
    logging.info(f"Using App ID: {config.APP_ID}")
    
    # Setup source and target tokens. You can put multiple source app tokens in a list.
    SOURCE_APP_TOKENS = [
        config.MERGE_SOURCE_APP_TOKEN_1, # Or replace with an actual App token string
        # "another_source_app_token",
    ]
    TARGET_APP_TOKEN = config.MERGE_TARGET_APP_TOKEN
    
    is_placeholder = (config.MERGE_SOURCE_APP_TOKEN_1 == "source_app_token_1")
    if is_placeholder:
        logging.warning("Please update config.py or environment variables with valid MERGE_* tokens to execute.")
    else:
        import_all_tables(client, access_token, SOURCE_APP_TOKENS, TARGET_APP_TOKEN)