#!/usr/bin/env python
# -*- coding: utf-8 -*-
# File:                Ampel-core/ampel/cli/BufferCommand.py
# License:             BSD-3-Clause
# Author:              valery brinnel <firstname.lastname@gmail.com>
# Date:                25.03.2021
# Last Modified Date:  27.08.2022
# Last Modified By:    valery brinnel <firstname.lastname@gmail.com>

import sys
from argparse import ArgumentParser
from collections.abc import Sequence
from typing import Any

from ampel.cli.AbsLoadCommand import AbsLoadCommand
from ampel.cli.AbsStockCommand import AbsStockCommand
from ampel.cli.AmpelArgumentParser import AmpelArgumentParser
from ampel.cli.ArgParserBuilder import ArgParserBuilder
from ampel.cli.utils import maybe_load_idmapper
from ampel.core.AmpelContext import AmpelContext
from ampel.log.LogFlag import LogFlag
from ampel.t3.T3Processor import T3Processor

hlp = {
	'config': 'Path to an ampel config file (yaml/json)',
	# Optional
	'secrets': 'Path to a YAML secrets store in sops format',
	'db': 'Database prefix. If set, "-mongo.prefix" value will be ignored',
	'out': 'Path to file where serialized views will be saved (printed to stdout otherwise)',
	'log-profile': 'One of: default, compact, headerless, verbose, debug',
	'id-mapper': 'Convert stock ids using the provided id mapper (ex: ZTFIdMapper)',
	'binary': 'Store buffers as compact BSON structures',
	'pretty': 'Show buffers using spacier prettyjson',
	'getch': 'Wait for a key to be pressed in terminal before printing next buffer (not compatible with binary option)'
}

class BufferCommand(AbsStockCommand, AbsLoadCommand):


	@staticmethod
	def get_sub_ops() -> list[str]:
		return ['show', 'save']


	# Mandatory implementation
	def get_parser(self, sub_op: None | str = None) -> ArgumentParser | AmpelArgumentParser:

		if sub_op in self.parsers:
			return self.parsers[sub_op]

		sub_ops = self.get_sub_ops()
		if sub_op is None or sub_op not in sub_ops:
			return AmpelArgumentParser.build_choice_help(
				'buffer', sub_ops, hlp, description = 'Show or save ampel buffers.'
			)

		builder = ArgParserBuilder('buffer')
		hlp.update(self.get_select_args_help())
		hlp.update(self.get_load_args_help())
		builder.add_parsers(sub_ops, hlp)

		builder.req('config')
		builder.req('out', 'save', default=True)

		builder.opt('secrets', default=None)
		builder.opt('id-mapper')
		builder.opt('debug', action='store_true')
		builder.opt('log-profile', default='default')
		builder.opt('binary', 'save', action='store_true')
		builder.opt('pretty', 'show', action='store_true')
		builder.opt('getch', 'show', action='store_true')

		# Selection args
		self.add_selection_args(builder)

		# Content args
		self.add_load_args(builder, 'Views content arguments')

		# Example
		builder.example('show', '-stock 85628462 -no-t0')
		builder.example('show', '-db MyDB -stock 519059889 -no-t0')
		builder.example('save', '-stock 85628462 -no-t0 -out ZTFabcdef.json')
		
		self.parsers.update(
			builder.get()
		)

		return self.parsers[sub_op]


	# Mandatory implementation
	def run(self, args: dict[str, Any], unknown_args: Sequence[str], sub_op: None | str = None) -> None:

		ctx = self.get_context(
			args, unknown_args, ContextClass = AmpelContext,
			require_existing_db = args['db'] or True, one_db='auto'
		)

		maybe_load_idmapper(args)

		conf = {
			'fd': open(args['out'], 'wb' if args.get('binary') else 'w') \
				if sub_op == 'save' else sys.stdout, # noqa: SIM115
			'id_mapper': args['id_mapper'],
			'verbose': sub_op == 'save',
			'binary': args.get('binary') or False
		}

		if args.get('pretty'):
			conf['pretty'] = True

		if not args.get('binary') and args.get('getch'):
			conf['getch'] = True

		t3p = T3Processor(
			context = ctx,
			process_name = 'BufferCommand',
			template = 'compact_t3',
			base_log_flag = LogFlag.MANUAL_RUN,
			log_profile = 'console_debug' if args.get('debug') else 'console_info',
			execute = [
				{
					'supply': {
						'unit': 'T3DefaultBufferSupplier',
						'config': {
							'select': self.build_select_model(args),
							'load': self.build_load_model(args)
						}
					},
					'stage': {
						'unit': 'T3BufferExporterStager',
						'config': conf
					}
				}
			]
		)

		t3p.run()
