#!/usr/bin/env python
# Startdate: 2021-12-15
# File: bws_db_sqlite.py
# Usage:
#    always loaded from bws_db, so these classes exist: Bookmark, User
# Reference:
#    get next pk number https://stackoverflow.com/questions/6950454/getting-the-next-auto-increment-value-of-a-sqlite-database/33285873#33285873
#    get latest pk number https://stackoverflow.com/questions/8479315/sql-inserting-a-row-and-returning-primary-key/54310457#54310457

# Dependencies:
#    python3
import sqlite3, sys, os, re

defaultfile = "bws.sqlite"
non_decimal = re.compile(r'[^\d.]+')

def db_init(
      source = defaultfile,
   ):
   print("DEBUG(sqlite): as sqlite file.")
   create_bookmarks_str = """
   CREATE TABLE bookmarks(
      bid INTEGER PRIMARY KEY AUTOINCREMENT,
      url TEXT,
      title TEXT,
      uid TEXT,
      tags TEXT,
      notes TEXT,
      iid INT,
      timestamp TEXT,
      order_id INT,
      always_open_in_new_tab BOOLEAN
   )
   """
   create_users_str = """
   CREATE TABLE users(
      uid INTEGER PRIMARY KEY AUTOINCREMENT,
      name TEXT,
      always_open_in_new_tab BOOLEAN
   )
   """

   try:
      r = _execute(source,create_bookmarks_str)
   except sqlite3.OperationalError as e:
      print(f"DEBUG(sqlite): sqlite file {source} already has table bookmarks.")
   #print("DEBUG(sqlite): Response from making bookmarks table starts on next line.")
   #print(r)

   try:
      r = _execute(source,create_users_str)
   except sqlite3.OperationalError as e:
      print(f"DEBUG(sqlite): sqlite file {source} already has table users.")
   #print("DEBUG(sqlite): next line starts create users response.")
   #print(r)
   return source

def db_wipe(source = defaultfile, i_really_mean_it = False):
   if i_really_mean_it == "Yes I Do":
      r = _execute(source,"DROP table users;")
      r = _execute(source,"DROP table bookmarks;")

def _db_get_next_pk(source = defaultfile, table =""):
   if table == "":
      return -1
   next_pk = -1
   r = _execute(source,f"SELECT seq+1 FROM SQLITE_SEQUENCE WHERE name = '{table}';")
   for i in r:
      next_pk = non_decimal.sub('',str(i))
   return next_pk

def db_get_next_available_uid(source = defaultfile):
   next_uid = -1
   return _db_get_next_pk(source,'users')

def db_get_next_available_bid(source = defaultfile):
   next_bid = -1
   return _db_get_next_pk(source,'bookmarks')

def db_set_sample_data(source = defaultfile):
   sample_users_str = """
   INSERT INTO users(name,always_open_in_new_tab)
   VALUES
      ('alfred',True),
      ('barney',True),
      ('charlie',False),
      ('dennis',True),
      ('edgar',True),
      ('bgirton',False);
      """
   sample_bookmarks_str = """
   INSERT INTO BOOKMARKS(url,title,uid,tags,order_id)
   VALUES
      ('https://startrek.com/','Star Trek front page',1,'home,fandom,star,trek',5),
      ('http://bugs.devuan.org','b.d.o',1,'bugs,devuan',11),
      ('https://slashdot.org/','/.',1,'news',3),
      ('https://alaskalinuxuser3.ddns.net','Alaska Linux User',6,'blog,alaska',8),
      ('https://google.com','Google search',4,'search',15),
      ('https://foxnews.com','Fox News',2,'news',12),
      ('https://distrowatch.com','Distrowatch',3,'news',2),
      ('https://freeipa.org','FreeIPA website',2,'freeipa',3),
      ('https://start.duckduckgo.com','ddg ',6,'search',4),
      ('https://google.com','Google search',5,'search',9),
      ('https://freefilesync.org/forum/','FreeFileSync forum',1,'forum,freefilesync',10),
      ('https://start.duckduckgo.com','ddg',3,'search,home',6),
      ('https://bgstack15.ddns.net','my site',6,'home,blog',7);
   """
   r = _execute(source,sample_users_str)
   r = _execute(source,sample_bookmarks_str)

def db_add_bookmark(source = defaultfile,
      url = "",
      title = "",
      uid = 0,
      tags = [],
      notes = "",
      iid = 0,
      timestamp = 0,
      order_id = 0,
      always_open_in_new_tab = False
   ):
   tags_str = _tags_to_db(tags)
   if type(timestamp) == tuple: timestamp = timestamp[0]
   # sqlite doesn't have a date datatype, so we will convert to ISO8601 string in the app side
   add_str = f"""
      INSERT INTO bookmarks(
         url, title, uid, tags, notes, iid,
         timestamp, order_id, always_open_in_new_tab
      )
      VALUES
      ('{url}','{title}','{uid}','{tags_str}',
         '{notes}','{iid}','{timestamp}','{order_id}',
         '{always_open_in_new_tab}'
      );
      """
   r = _execute(source,add_str)
   #print("DEBUG(sqlite): next line is response to adding bookmark to sqlite table.")
   #print(r)
   # try this get new bid trick
   #print("DEBUG(sqlite): next line(s) are new bid trick")
   #r = _execute("SELECT last_insert_rowid()")
   #new_bid = -1
   #for i in r:
   #   new_bid = non_decimal.sub('',str(i))
   #print("DEBUG(sqlite): DONE with new bid trick")
   print(f"R is {r}")
   new_bid = r.lastrowid
   return new_bid

def db_get_bookmark_by_id(source = defaultfile,
      bid = -1
   ):
   """Returns a Bookmark object for the given bid. Returns None if bid does not exist."""
   if -1 == bid or "-1" == bid or bid is None:
      return None
   from bws_db import Bookmark
   count = -1
   select_str = f"SELECT COUNT(bid) FROM bookmarks WHERE bid = {bid}"
   get_str = f"SELECT bid,url,title,uid,tags,notes,iid,timestamp,order_id,always_open_in_new_tab FROM bookmarks WHERE bid = {bid};"
   r = _execute(source,select_str)
   for i in r:
      count = non_decimal.sub('',str(i))
   r = _execute(source,get_str)
   print(f"DEBUG(sqlite): found {count} records for bid {bid}.")
   b = None
   for i in r:
      print("Bookmark:",i)
      bid, url, title, uid, tags, notes, iid, timestamp, order_id, aoint = i
      b = Bookmark(
            source,
            bid = bid,
            url = url,
            title = title,
            uid = uid,
            tags = _tags_from_db(tags),
            notes = notes,
            iid = iid,
            timestamp = timestamp,
            order_id = order_id,
            always_open_in_new_tab = aoint,
            _from_db = True
      )
   return b

def db_get_all_bookmarks(source = defaultfile,
      user = ""
   ):
   """
   Returns a list of Bookmark objects. If user matches a username or uid, the list includes bookmarks only for that user. Otherwise, returns the entire list.
   """
   from bws_db import Bookmark
   bm_list = []
   get_str = "SELECT bid,url,title,uid,tags,notes,iid,timestamp,order_id,always_open_in_new_tab FROM bookmarks"
   if "" != user:
      uid = db_get_uid_from_any(source = source, name = user)
      get_str += f" WHERE uid = '{uid}'"
   get_str += ";"
   #print(f"DEBUG(sqlite): looking for all bookmarks, possible for user \"{user}\" with query:")
   #print(get_str)
   r = _execute(source,get_str)
   for i in r:
      print("Bookmark:",i)
      bid, url, title, uid, tags, notes, iid, timestamp, order_id, aoint = i
      b = Bookmark(
            source,
            bid = bid,
            url = url,
            title = title,
            uid = uid,
            tags = _tags_from_db(tags),
            notes = notes,
            iid = iid,
            timestamp = timestamp,
            order_id = order_id,
            always_open_in_new_tab = aoint,
            _from_db = True
      )
      bm_list.append(b)
   return bm_list

def db_get_user_name_from_uid(
      source = defaultfile,
      uid = 0
   ):
   get_user_str = f"SELECT name from users WHERE uid = '{uid}';"
   r = _execute(source,get_user_str)
   name = ""
   for i in r:
      j = i
      if type(i) == tuple:
         j = i[0]
      print("DEBUG(sqlite): db_get_username_from_uid got:",j)
      name = j.replace("(","").replace(",)","")
   return name

def _db_get_uid_from_name(
      source = defaultfile,
      name = 0
   ):
   get_uid_str = f"SELECT uid from users WHERE name = '{name}';"
   r = _execute(source,get_uid_str)
   for i in r:
      #print(f"DEBUG(sqlite): looking for user {name}, found row: {i}")
      uid = non_decimal.sub('',str(i))
   return uid

def db_get_uid_from_any(
      source = defaultfile,
      name = 0
   ):
   uid = -1
   get_uid_str = f"SELECT uid from users WHERE (name = '{name}' or uid = '{name}');"
   r = _execute(source,get_uid_str)
   for i in r:
      #print(f"DEBUG(sqlite): looking for user {name}, found row: {i}")
      uid = non_decimal.sub('',str(i))
   return uid

def _execute(
      source = defaultfile,
      command = ""
   ):
   print(f"DEBUG(sqlite): _execute(command=\"{command}\")")
   if type(source) == sqlite3.Connection:
      return source.execute(command)
   else:
      with sqlite3.connect(source) as conn:
         return conn.execute(command)

def db_delete_bookmark(
      source = defaultfile,
      bid = None
   ):
   count = -1
   if bid is not None:
      select_str = f"SELECT COUNT(bid) FROM bookmarks WHERE bid = {bid};"
      delete_str = f"DELETE FROM bookmarks WHERE bid = {bid};"
      r = _execute(source,select_str)
      for i in r:
         count = non_decimal.sub('',str(i))
      r = _execute(source,delete_str)
      print(f"DEBUG(sqlite): [bws_db_sqlite] deleted bid {bid}, which deleted {count} rows.")
   return count

def _tags_to_db(tags):
   """
   Convert a python list to comma-separated string for a single column in sqlite database
   """
   # probably need better sanitization than this poor man's version.
   print(f"DEBUG(sqlite): trying to split tags \"{tags}\".")
   print(f"DEBUG(sqlite): which is type \"{type(tags)}\".")
   if type(tags) == list:
      return ','.join(tags).replace('"','').replace("'",'').replace(",,",",").rstrip(',')
   elif type(tags) == tuple:
      return ','.join(tags[0]).replace('"','').replace("'",'').replace(",,",",").rstrip(',')
   else:
      return tags

def _tags_from_db(tags):
   """
   Convert a comma-separated string from sqlite column into a python list
   """
   return tags.split(',')

def db_update_bookmark(
      source = defaultfile,
      bid = -1,
      url = "BAD",
      title = "BAD",
      uid = -1,
      tags = ["BAD"],
      notes = "BAD",
      iid = -1,
      timestamp = "BAD",
      order_id = -2,
      always_open_in_new_tab = -1,
   ):
   """Update a bookmark entry in the sqlite source. All fields are required."""
   print(f"DEBUG(sqlite) db_update_bookmark: locals={locals()}")
   if "BAD" == url or "BAD" == title or ["BAD"] == tags or "BAD" == notes or "BAD" == timestamp or -1 == bid or -1 == uid or -1 == iid or -2 == order_id or -1 == always_open_in_new_tab:
      print("db_update_bookmark() needs all bookmark properties passed to it.")
      return -1
   tags_str = _tags_to_db(tags)
   update_str = f"""
      UPDATE bookmarks
      SET
         url = '{url}',
         title = '{title}',
         uid = '{uid}',
         tags = '{tags_str}',
         notes = '{notes}',
         iid = '{iid}',
         timestamp = '{timestamp}',
         order_id = '{order_id}',
         always_open_in_new_tab = '{always_open_in_new_tab}'
      WHERE bid = '{bid}';
   """
   try:
      r = _execute(source,update_str)
   except e:
      print(f"Error! When trying to update bid {bid}, got error {e}")

def db_add_user(
      source,
      name = "",
      always_open_in_new_tab = False
   ):
   print(f"DEBUG(sqlite): STUB for db_add_user")
   # return int(r) # should be new uid

def db_get_all_users(source = defaultfile):
   """
   Returns a list of users and their settings.
   """
   from bws_db import User
   user_list = []
   get_str = "SELECT uid,name,always_open_in_new_tab FROM users;"
   r = _execute(source,get_str)
   for i in r:
      print("User:",i)
      uid, name, aoint = i
      u = User(source,
         uid = uid,
         name = name,
         always_open_in_new_tab = aoint,
         _from_db = True
      )
      user_list.append(u)
   return user_list