#! /bin/bash

set -e

# only allow the $WUBLOADER_USER to connect remotely rather than all users
sed -i "/host all all all/d" "$PGDATA/pg_hba.conf"
echo "host all $WUBLOADER_USER all md5" >> "$PGDATA/pg_hba.conf"

echo "Creating $WUBLOADER_USER"
psql -v ON_ERROR_STOP=1 -U $POSTGRES_USER <<-EOSQL

CREATE USER $WUBLOADER_USER LOGIN PASSWORD '$WUBLOADER_PASSWORD';

EOSQL


if [ -n "$REPLICATION_USER" ]; then
	echo "Creating $REPLICATION_USER"
	# allow the $REPLICATION user to replicate remotely
	echo "host replication $REPLICATION_USER all md5" >> "$PGDATA/pg_hba.conf"
	psql -v ON_ERROR_STOP=1 -U $POSTGRES_USER <<-EOSQL

	CREATE USER $REPLICATION_USER LOGIN REPLICATION PASSWORD '$REPLICATION_PASSWORD';

	EOSQL

	cat >> ${PGDATA}/postgresql.conf <<-EOF
	wal_level = replica
	archive_mode = on
	archive_command = 'cd .'
	max_wal_senders = 8
	wal_keep_segments = 8
	EOF

fi

echo "Applying schema for $POSTGRES_DB"
psql -v ON_ERROR_STOP=1 -U $WUBLOADER_USER -d $POSTGRES_DB <<-EOSQL

CREATE TYPE event_state as ENUM (
	'UNEDITED',
	'EDITED',
	'CLAIMED',
	'FINALIZING',
	'TRANSCODING',
	'DONE',
	'MODIFIED'
);

CREATE TYPE video_range as (
	start TIMESTAMP,
	"end" TIMESTAMP
);

CREATE TYPE video_transition as (
	type TEXT,
	duration INTERVAL
);

CREATE TYPE thumbnail_mode as ENUM (
	'NONE',
	'BARE',
	'TEMPLATE',
	'CUSTOM'
);

CREATE TABLE events (
	id UUID PRIMARY KEY,

	sheet_name TEXT NOT NULL,
	event_start TIMESTAMP,
	event_end TIMESTAMP,
	category TEXT NOT NULL DEFAULT '',
	description TEXT NOT NULL DEFAULT '',
	submitter_winner TEXT NOT NULL DEFAULT '',
	poster_moment BOOLEAN NOT NULL DEFAULT FALSE,
	image_links TEXT[] NOT NULL DEFAULT '{}', -- default empty array
	notes TEXT NOT NULL DEFAULT '',
	tags TEXT[] NOT NULL DEFAULT '{}', -- default empty array

	allow_holes BOOLEAN NOT NULL DEFAULT FALSE,
	uploader_whitelist TEXT[],
	upload_location TEXT CHECK (state = 'UNEDITED' OR upload_location IS NOT NULL),
	public BOOLEAN NOT NULL DEFAULT TRUE,
	video_ranges video_range[] CHECK (state IN ('UNEDITED', 'DONE') OR video_ranges IS NOT NULL),
	video_transitions video_transition[] CHECK (state IN ('UNEDITED', 'DONE') OR video_transitions IS NOT NULL),
	CHECK (
		(video_ranges IS NULL AND video_transitions IS NULL)
		OR CARDINALITY(video_ranges) = CARDINALITY(video_transitions) + 1
	),
	video_title TEXT CHECK (state IN ('UNEDITED', 'DONE') OR video_title IS NOT NULL),
	video_description TEXT CHECK (state IN ('UNEDITED', 'DONE') OR video_description IS NOT NULL),
	video_tags TEXT[] CHECK (state IN ('UNEDITED', 'DONE') OR video_tags IS NOT NULL),
	video_channel TEXT CHECK (state IN ('UNEDITED', 'DONE') OR video_channel IS NOT NULL),
	video_quality TEXT NOT NULL DEFAULT 'source',

	thumbnail_mode thumbnail_mode NOT NULL DEFAULT 'TEMPLATE',
	thumbnail_time TIMESTAMP CHECK (
		state = 'UNEDITED'
		OR thumbnail_mode in ('NONE', 'CUSTOM')
		OR thumbnail_time IS NOT NULL
	),
	thumbnail_template TEXT CHECK (
		state = 'UNEDITED'
		OR thumbnail_mode != 'TEMPLATE'
		OR thumbnail_template IS NOT NULL
	),
	thumbnail_image BYTEA CHECK (
		state = 'UNEDITED'
		OR thumbnail_mode != 'CUSTOM'
		OR thumbnail_image IS NOT NULL
	),
	thumbnail_last_written BYTEA CHECK (
		state != 'DONE'
		OR thumbnail_mode = 'NONE'
		OR thumbnail_last_written IS NOT NULL
	),
	
	state event_state NOT NULL DEFAULT 'UNEDITED',
	uploader TEXT CHECK (state IN ('UNEDITED', 'EDITED', 'DONE') OR uploader IS NOT NULL),
	error TEXT,
	video_id TEXT,
	video_link TEXT CHECK (state != 'DONE' OR video_link IS NOT NULL),
	editor TEXT,
	edit_time TIMESTAMP CHECK (state = 'UNEDITED' OR editor IS NOT NULL),
	upload_time TIMESTAMP CHECK (state != 'DONE' OR upload_time IS NOT NULL),
	last_modified TIMESTAMP CHECK (state != 'MODIFIED' OR last_modified IS NOT NULL)
);

-- Index on state, since that's almost always what we're querying on besides id
CREATE INDEX event_state ON events (state);

CREATE TABLE nodes (
	name TEXT PRIMARY KEY,
	url TEXT NOT NULL,
	backfill_from BOOLEAN NOT NULL DEFAULT TRUE
);

CREATE TABLE editors (
	email TEXT PRIMARY KEY,
	name TEXT NOT NULL
);

-- Playlists are communicated to playlist manager via this table.
-- Sheetsync will wipe and re-populate this table periodically to match what is in the sheet
CREATE TABLE playlists (
	playlist_id TEXT PRIMARY KEY,
	name TEXT NOT NULL,
	tags TEXT[] NOT NULL,
	show_in_description BOOLEAN NOT NULL
);
EOSQL

if [ -a /mnt/wubloader/nodes.csv ]; then
	echo "Loading nodes from nodes.csv"
	psql -v ON_ERROR_STOP=1 -U $POSTGRES_USER -d $POSTGRES_DB <<-EOF
	COPY nodes FROM '/mnt/wubloader/nodes.csv' DELIMITER ',' CSV HEADER;
	EOF
fi

if [ -a /mnt/wubloader/editors.csv ]; then
	echo "Loading editors from editors.csv"
	psql -v ON_ERROR_STOP=1 -U $POSTGRES_USER -d $POSTGRES_DB <<-EOF
	COPY editors FROM '/mnt/wubloader/editors.csv' DELIMITER ',' CSV HEADER;
	EOF
fi

if [ -n "READONLY_USER" ]; then
	echo "Creating $READONLY_USER"
	# allow $READONLY_USER to connect remotely
	echo "host all $READONLY_USER all md5" >> "$PGDATA/pg_hba.conf"
	psql -v ON_ERROR_STOP=1 -U $POSTGRES_USER -d $POSTGRES_DB <<-EOSQL

	CREATE USER $READONLY_USER WITH CONNECTION LIMIT 50 LOGIN PASSWORD '$READONLY_PASSWORD';
	GRANT CONNECT ON DATABASE $POSTGRES_DB TO $READONLY_USER;
	GRANT USAGE ON SCHEMA public TO $READONLY_USER;
	GRANT SELECT ON ALL TABLES IN SCHEMA public TO $READONLY_USER;

	EOSQL
fi