-- KosmoConnect Initial Schema
-- Runs automatically when the TimescaleDB container starts for the first time

-- Enable TimescaleDB extension
CREATE EXTENSION IF NOT EXISTS timescaledb;

-- ============================================================
-- Nodes Registry
-- ============================================================
CREATE TABLE IF NOT EXISTS nodes (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    mesh_node_id TEXT UNIQUE NOT NULL,
    name TEXT,
    lat DOUBLE PRECISION,
    lon DOUBLE PRECISION,
    hardware_revision TEXT DEFAULT 'v1.0',
    installed_at TIMESTAMPTZ DEFAULT NOW(),
    last_seen TIMESTAMPTZ,
    is_active BOOLEAN DEFAULT true,
    metadata JSONB DEFAULT '{}'
);

CREATE INDEX IF NOT EXISTS idx_nodes_mesh_node_id ON nodes(mesh_node_id);
CREATE INDEX IF NOT EXISTS idx_nodes_last_seen ON nodes(last_seen);

-- ============================================================
-- Environmental Readings (Time-series)
-- ============================================================
CREATE TABLE IF NOT EXISTS enviro_readings (
    time TIMESTAMPTZ NOT NULL,
    node_id TEXT NOT NULL REFERENCES nodes(mesh_node_id) ON DELETE CASCADE,
    temperature_c DOUBLE PRECISION,
    humidity_percent DOUBLE PRECISION,
    pressure_pa DOUBLE PRECISION,
    wind_speed_ms DOUBLE PRECISION,
    wind_direction SMALLINT,
    pm25_ugm3 DOUBLE PRECISION,
    pm10_ugm3 DOUBLE PRECISION,
    gas_resistance_kohm DOUBLE PRECISION,
    battery_voltage DOUBLE PRECISION,
    solar_voltage DOUBLE PRECISION
);

-- Convert to hypertable for automatic time-based partitioning
SELECT create_hypertable('enviro_readings', 'time', if_not_exists => TRUE);

CREATE INDEX IF NOT EXISTS idx_enviro_node_id_time ON enviro_readings(node_id, time DESC);

-- ============================================================
-- Mesh Messages (for gateway delivery tracking)
-- ============================================================
CREATE TABLE IF NOT EXISTS mesh_messages (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    user_id UUID REFERENCES users(id) ON DELETE SET NULL,
    direction TEXT NOT NULL CHECK (direction IN ('inbound', 'outbound')),
    sender_node_id TEXT,
    target_node_id TEXT,
    gateway_node_id TEXT,
    text TEXT,
    status TEXT DEFAULT 'pending' CHECK (status IN ('pending', 'queued', 'transmitted', 'delivered', 'failed')),
    hop_count INTEGER,
    rssi INTEGER,
    snr DOUBLE PRECISION,
    created_at TIMESTAMPTZ DEFAULT NOW(),
    updated_at TIMESTAMPTZ DEFAULT NOW()
);

CREATE INDEX IF NOT EXISTS idx_mesh_messages_status ON mesh_messages(status);
CREATE INDEX IF NOT EXISTS idx_mesh_messages_target ON mesh_messages(target_node_id, created_at DESC);

-- ============================================================
-- Users & Subscriptions (minimal schema for Phase 1/2)
-- ============================================================
CREATE TABLE IF NOT EXISTS users (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    email TEXT UNIQUE NOT NULL,
    stripe_customer_id TEXT,
    created_at TIMESTAMPTZ DEFAULT NOW()
);

CREATE TABLE IF NOT EXISTS subscriptions (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    user_id UUID NOT NULL REFERENCES users(id) ON DELETE CASCADE,
    plan_type TEXT NOT NULL CHECK (plan_type IN ('free', 'wanderer', 'guardian', 'sanctuary')),
    stripe_subscription_id TEXT,
    message_quota INTEGER,
    messages_used INTEGER DEFAULT 0,
    valid_from TIMESTAMPTZ DEFAULT NOW(),
    valid_until TIMESTAMPTZ,
    is_active BOOLEAN DEFAULT true
);

CREATE INDEX IF NOT EXISTS idx_subscriptions_user ON subscriptions(user_id);

CREATE TABLE IF NOT EXISTS allowed_nodes (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    user_id UUID NOT NULL REFERENCES users(id) ON DELETE CASCADE,
    mesh_node_id TEXT NOT NULL,
    nickname TEXT,
    created_at TIMESTAMPTZ DEFAULT NOW(),
    UNIQUE(user_id, mesh_node_id)
);