# 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

# Dimension Tables

user_table_create = ("""
CREATE TABLE IF NOT EXISTS users (user_id    int PRIMARY KEY, 
                                  first_name varchar, 
                                  last_name  varchar,
                                  gender     varchar(1), 
                                  level      varchar(4));
""")

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

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

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

# Fact Table

songplay_table_create = ("""
CREATE TABLE IF NOT EXISTS songplays (songplay_id SERIAL    PRIMARY KEY,
                                      start_time  timestamp NOT NULL REFERENCES time (start_time),
                                      user_id     int       NOT NULL REFERENCES users (user_id),
                                      level       varchar(4),
                                      song_id     varchar   REFERENCES songs (song_id),
                                      artist_id   varchar   REFERENCES artists (artist_id),
                                      session_id  int,
                                      location    text,
                                      user_agent  text);
""")


# 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)
    ON CONFLICT (songplay_id) DO NOTHING;
""")

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
# implement the song_select query in sql_queries.py to find the song ID and artist ID based on the title, artist name, and duration of a song.

song_select = ("""
    SELECT s.song_id, a.artist_id
    FROM songs s
    INNER 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 = [user_table_create, song_table_create, artist_table_create,
                        time_table_create, songplay_table_create]
drop_table_queries = [songplay_table_drop, user_table_drop, song_table_drop,
                      artist_table_drop, time_table_drop]