CREATE TABLE IF NOT EXISTS seen_hosts (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    ip_address TEXT NOT NULL
);

CREATE TABLE IF NOT EXISTS seen_users (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    user TEXT NOT NULL
);

CREATE TABLE IF NOT EXISTS seen_routes (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    route TEXT NOT NULL,
    method TEXT NOT NULL
);

CREATE TABLE IF NOT EXISTS response_code (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    code INTEGER NOT NULL
);

CREATE TABLE IF NOT EXISTS requests (
    uuid TEXT PRIMARY KEY,
    date TEXT NOT NULL,
    host_id INTEGER NOT NULL REFERENCES seen_hosts(id) ON DELETE CASCADE,
    user_id INTEGER NOT NULL REFERENCES seen_users(id) ON DELETE CASCADE,
    route_id INTEGER NOT NULL REFERENCES seen_routes(id) ON DELETE CASCADE,
    response_code_id INTEGER NOT NULL REFERENCES response_code(id) ON DELETE RESTRICT
);

CREATE VIEW IF NOT EXISTS all_requests AS
    SELECT
        q.uuid,
        q.date,
        h.ip_address,
        u.user,
        r.method,
        r.route,
        c.code
    FROM
        requests AS q
    JOIN
        seen_hosts AS h ON q.host_id = h.id
    JOIN
        seen_users AS u ON q.user_id = u.id
    JOIN
        seen_routes AS r ON q.route_id = r.id
    JOIN
        response_code AS c on q.response_code_id = c.id;

/* Make all_requests a writable view via triggers.  We will always stomp the main row, as the last update will be what we want. */
CREATE TRIGGER IF NOT EXISTS insert_all_requests INSTEAD OF INSERT ON all_requests BEGIN
    INSERT OR IGNORE  INTO response_code (code)         VALUES (NEW.code);
    INSERT OR IGNORE  INTO seen_routes   (route,method) VALUES (NEW.route, NEW.method);
    INSERT OR IGNORE  INTO seen_users    (user)         VALUES (NEW.user);
    INSERT OR IGNORE  INTO seen_hosts    (ip_address)   VALUES (NEW.ip_address);
    INSERT OR REPLACE INTO requests SELECT
        NEW.uuid,
        NEW.date,
        h.id AS host_id,
        u.id AS user_id,
        r.id AS route_id,
        c.id AS response_code_id
    FROM seen_hosts AS h
    JOIN seen_users AS u ON u.user = NEW.user
    JOIN seen_routes AS r ON r.route = NEW.route AND r.method = NEW.method
    JOIN response_code AS c ON c.code = NEW.code
    WHERE h.ip_address = NEW.ip_address;
END;

/* This is just to store various messages associated with requests, which are usually errors. */
CREATE TABLE IF NOT EXISTS messages (
    uuid TEXT NOT NULL REFERENCES requests ON DELETE NO ACTION,
    message TEXT NOT NULL
);