<reponame>rtelles64/DataEng_Nano-<gh_stars>0
# DROP TABLES

songplay_table_drop = "DROP TABLE IF EXISTS songplays;"
user_table_drop = "DROP TABLE IF EXISTS users;"
song_table_drop = "DROP TABLE IF EXISTS songs;"
artist_table_drop = "DROP TABLE IF EXISTS artists;"
time_table_drop = "DROP TABLE IF EXISTS time;"

# CREATE TABLES

songplay_table_create = ("""
    CREATE TABLE IF NOT EXISTS songplays
        (songplay_id serial NOT NULL, \
         start_time timestamp,
         user_id varchar NOT NULL,
         level varchar NOT NULL,
         song_id text,
         artist_id text,
         session_id int,
         location text,
         user_agent text,
         PRIMARY KEY (songplay_id));
""")

user_table_create = ("""
    CREATE TABLE IF NOT EXISTS users
        (user_id varchar NOT NULL,
         first_name varchar,
         last_name varchar,
         gender char,
         level varchar NOT NULL,
         PRIMARY KEY (user_id));
""")

song_table_create = ("""
    CREATE TABLE IF NOT EXISTS songs
        (song_id text NOT NULL,
         title text NOT NULL,
         artist_id text,
         year int,
         duration float,
         PRIMARY KEY (song_id));
""")

artist_table_create = ("""
    CREATE TABLE IF NOT EXISTS artists
        (artist_id text NOT NULL,
         name varchar NOT NULL,
         location text,
         latitude numeric,
         longitude numeric,
         PRIMARY KEY (artist_id));
""")

time_table_create = ("""
    CREATE TABLE IF NOT EXISTS time
        (start_time timestamp NOT NULL,
         hour int,
         day int,
         week int,
         month int,
         year int,
         weekday varchar,
         PRIMARY KEY (start_time));
""")

# INSERT RECORDS

songplay_table_insert = ("""
    INSERT INTO songplays
        (start_time, user_id, level, song_id,
         artist_id, session_id, location, user_agent)
    VALUES (%s, %s, %s, %s, %s, %s, %s, %s);
""")

user_table_insert = ("""
    INSERT INTO users (user_id, first_name, last_name, gender, level)
    VALUES (%s, %s, %s, %s, %s)
    ON CONFLICT (user_id) DO UPDATE SET level = EXCLUDED.level;
""")

song_table_insert = ("""
    INSERT INTO songs (song_id, title, artist_id, year, duration)
    VALUES (%s, %s, %s, %s, %s)
    ON CONFLICT (song_id) DO NOTHING;
""")

artist_table_insert = ("""
    INSERT INTO artists (artist_id, name, location, latitude, longitude)
    VALUES (%s, %s, %s, %s, %s)
    ON CONFLICT (artist_id) DO NOTHING;
""")


time_table_insert = ("""
    INSERT INTO time (start_time, hour, day, week, month, year, weekday)
    VALUES (%s, %s, %s, %s, %s, %s, %s)
    ON CONFLICT (start_time) DO NOTHING;
""")

# FIND SONGS

song_select = ("""
    SELECT s.song_id, a.artist_id
    FROM songs s
    JOIN artists a ON s.artist_id = a.artist_id
    WHERE s.title = %s AND a.name = %s AND s.duration = %s;
""")

# QUERY LISTS

create_table_queries = [
    songplay_table_create, user_table_create, song_table_create,
    artist_table_create, time_table_create
]
drop_table_queries = [
    songplay_table_drop, user_table_drop, song_table_drop, artist_table_drop,
    time_table_drop
]
