CREATE TABLE IF NOT EXISTS "device" (
	"device_id" UUID NOT NULL DEFAULT uuidv4(),
	"device_eui" VARCHAR(255) NOT NULL UNIQUE,
	"site_id" UUID,
	PRIMARY KEY("device_id")
);

CREATE TABLE IF NOT EXISTS "site" (
	"site_id" UUID NOT NULL DEFAULT uuidv4(),
	"pce" VARCHAR(255) NOT NULL UNIQUE,
	"address_1" VARCHAR(255) NOT NULL,
	"address_2" VARCHAR(255),
	"postal_code" VARCHAR(255) NOT NULL,
	"city" VARCHAR(255) NOT NULL,
	PRIMARY KEY("site_id")
);

CREATE TABLE IF NOT EXISTS "user" (
	"user_id" UUID NOT NULL DEFAULT uuidv4(),
	"name" VARCHAR(255) NOT NULL,
	"first_name" VARCHAR(255) NOT NULL,
	"email" VARCHAR(255) NOT NULL UNIQUE,
	"password_hash" VARCHAR(255),
	"user_type_id" UUID NOT NULL,
	PRIMARY KEY("user_id")
);

CREATE TABLE IF NOT EXISTS "reading" (
	"reading_id" UUID NOT NULL DEFAULT uuidv7(),
	"device_id" UUID NOT NULL,
	"date" TIMESTAMP NOT NULL,
	"pulses" INTEGER NOT NULL,
	PRIMARY KEY("reading_id")
);

CREATE TABLE IF NOT EXISTS "subscription" (
	"subscription_id" UUID NOT NULL DEFAULT uuidv4(),
	"site_id" UUID NOT NULL,
	"user_id" UUID NOT NULL,
	PRIMARY KEY("subscription_id")
);

CREATE TABLE IF NOT EXISTS "user_type" (
	"user_type_id" UUID NOT NULL DEFAULT uuidv4(),
	"label" VARCHAR(255) NOT NULL,
	PRIMARY KEY("user_type_id")
);

ALTER TABLE "device"
ADD FOREIGN KEY("site_id") REFERENCES "site"("site_id")
ON UPDATE NO ACTION ON DELETE NO ACTION;
ALTER TABLE "subscription"
ADD FOREIGN KEY("site_id") REFERENCES "site"("site_id")
ON UPDATE NO ACTION ON DELETE NO ACTION;
ALTER TABLE "subscription"
ADD FOREIGN KEY("user_id") REFERENCES "user"("user_id")
ON UPDATE NO ACTION ON DELETE NO ACTION;
ALTER TABLE "reading"
ADD FOREIGN KEY("device_id") REFERENCES "device"("device_id")
ON UPDATE NO ACTION ON DELETE NO ACTION;
ALTER TABLE "user"
ADD FOREIGN KEY("user_type_id") REFERENCES "user_type"("user_type_id")
ON UPDATE NO ACTION ON DELETE NO ACTION;