CREATE TABLE "List" (
  "id" UUID DEFAULT gen_random_uuid() NOT NULL,
  "title" VARCHAR NOT NULL,
  "user_username" VARCHAR NOT NULL 
);

CREATE TABLE "Task" (
  "id" UUID DEFAULT gen_random_uuid() NOT NULL,
  "title" VARCHAR NOT NULL,
  "description" VARCHAR,
  "completed" BOOLEAN NOT NULL,
  "user_username" VARCHAR NOT NULL,
  "list_id" UUID NOT NULL 
);

CREATE TABLE "User" (
  "username" VARCHAR NOT NULL,
  "name" VARCHAR 
);

ALTER TABLE "List" ADD PRIMARY KEY ("id");

ALTER TABLE "Task" ADD PRIMARY KEY ("id");

ALTER TABLE "User" ADD PRIMARY KEY ("username");

ALTER TABLE "List" ADD CONSTRAINT fk_list_1 FOREIGN KEY ("user_username") REFERENCES "User" ("username");

ALTER TABLE "Task" ADD CONSTRAINT fk_task_2 FOREIGN KEY ("user_username") REFERENCES "User" ("username");

ALTER TABLE "Task" ADD CONSTRAINT fk_task_3 FOREIGN KEY ("list_id") REFERENCES "List" ("id");