#!/usr/bin/python3

"""
Import final p111.

For each survey in configuration.surveys(), check for new
or modified final P1/11 files and (re-)import them into the
database.
"""

import os
import sys
import pathlib
import re
import time
import configuration
import p111
from datastore import Datastore

def add_pending_remark(db, sequence):
	text = '<!-- @@DGL:PENDING@@ --><h4 style="color:red;cursor:help;" title="Edit the sequence file or directory name to import final data">Marked as <code>PENDING</code>.</h4><!-- @@/DGL:PENDING@@ -->\n'

	with db.conn.cursor() as cursor:
		qry = "SELECT remarks FROM raw_lines WHERE sequence = %s;"
		cursor.execute(qry, (sequence,))
		remarks = cursor.fetchone()[0]
		rx = re.compile("^(<!-- @@DGL:PENDING@@ -->.*<!-- @@/DGL:PENDING@@ -->\n)")
		m = rx.match(remarks)
		if m is None:
			remarks = text + remarks
			qry = "UPDATE raw_lines SET remarks = %s WHERE sequence = %s;"
			cursor.execute(qry, (remarks, sequence))
			db.maybe_commit()

def del_pending_remark(db, sequence):

	with db.conn.cursor() as cursor:
		qry = "SELECT remarks FROM raw_lines WHERE sequence = %s;"
		cursor.execute(qry, (sequence,))
		row = cursor.fetchone()
		if row is not None:
			remarks = row[0]
			rx = re.compile("^(<!-- @@DGL:PENDING@@ -->.*<!-- @@/DGL:PENDING@@ -->\n)")
			m = rx.match(remarks)
			if m is not None:
				remarks = rx.sub("",remarks)
				qry = "UPDATE raw_lines SET remarks = %s WHERE sequence = %s;"
				cursor.execute(qry, (remarks, sequence))
				db.maybe_commit()

if __name__ == '__main__':

	print("Reading configuration")
	file_min_age = configuration.read().get('imports', {}).get('file_min_age', 10)

	print("Connecting to database")
	db = Datastore()
	surveys = db.surveys()

	print("Reading surveys")
	for survey in surveys:
		print(f'Survey: {survey["id"]} ({survey["schema"]})')

		db.set_survey(survey["schema"])

		try:
			final_p111 = survey["final"]["p111"]
		except KeyError:
			print("No final P1/11 configuration")
			exit(0)

		pattern = final_p111["pattern"]
		rx = re.compile(pattern["regex"])

		if "pending" in survey["final"]:
			pendingRx = re.compile(survey["final"]["pending"]["pattern"]["regex"])

		for fileprefix in final_p111["paths"]:
			print(f"Path prefix: {fileprefix}")

			for globspec in final_p111["globs"]:
				for filepath in pathlib.Path(fileprefix).glob(globspec):
					filepath = str(filepath)
					print(f"Found {filepath}")

					pending = False
					if pendingRx:
						pending = pendingRx.search(filepath) is not None

					if not db.file_in_db(filepath):

						age = time.time() - os.path.getmtime(filepath)
						if age < file_min_age:
							print("Skipping file because too new", filepath)
							continue

						print("Importing")

						match = rx.match(os.path.basename(filepath))
						if not match:
							error_message = f"File path not match the expected format! ({filepath} ~ {pattern['regex']})"
							print(error_message, file=sys.stderr)
							print("This file will be ignored!")
							continue

						file_info = dict(zip(pattern["captures"], match.groups()))
						file_info["meta"] = {}

						if pending:
							print("Skipping / removing final file because marked as PENDING", filepath)
							db.del_sequence_final(file_info["sequence"])
							add_pending_remark(db, file_info["sequence"])
							continue
						else:
							del_pending_remark(db, file_info["sequence"])

						p111_data = p111.from_file(filepath)

						print("Saving")

						p111_records = p111.p111_type("S", p111_data)
						file_info["meta"]["lineName"] = p111.line_name(p111_data)

						db.save_final_p111(p111_records, file_info, filepath, survey["epsg"])
					else:
						print("Already in DB")
						if pending:
							print("Removing from database because marked as PENDING")
							db.del_sequence_final(file_info["sequence"])
							add_pending_remark(db, file_info["sequence"])

	print("Done")