-- Phase 24 migration: add users table (browser auth) and server-side trips.
-- Run manually against the live Postgres DB:
--   psql $DSN -f sql/migrate_phase24.sql

-- ── Browser session users ──────────────────────────────────────────────────
CREATE TABLE IF NOT EXISTS users (
    id            SERIAL PRIMARY KEY,
    username      TEXT NOT NULL UNIQUE,
    password_hash TEXT NOT NULL,          -- bcrypt hash
    created_at    TIMESTAMPTZ NOT NULL DEFAULT now()
);

-- ── Server-side trip index ─────────────────────────────────────────────────
-- Computed from tracking_points by compute_trips_for_device().
-- Idempotent: re-running recomputes and upserts without duplicating rows.
CREATE TABLE IF NOT EXISTS trips (
    id              BIGSERIAL PRIMARY KEY,
    device_id       INTEGER NOT NULL REFERENCES devices(id) ON DELETE CASCADE,
    start_time      TIMESTAMPTZ NOT NULL,
    end_time        TIMESTAMPTZ NOT NULL,
    distance_km     DOUBLE PRECISION NOT NULL DEFAULT 0,
    duration_s      INTEGER NOT NULL DEFAULT 0,
    avg_speed_kmh   DOUBLE PRECISION,
    max_speed_kmh   DOUBLE PRECISION,
    start_lat       DOUBLE PRECISION,
    start_lon       DOUBLE PRECISION,
    end_lat         DOUBLE PRECISION,
    end_lon         DOUBLE PRECISION,
    point_count     INTEGER NOT NULL DEFAULT 0,
    computed_at     TIMESTAMPTZ NOT NULL DEFAULT now(),
    UNIQUE (device_id, start_time)
);

CREATE INDEX IF NOT EXISTS idx_trips_device_start
    ON trips (device_id, start_time DESC);