-- Migración 003: Tablas para sistema de Drones (AtomicDrones)
-- Fecha: 2026-04-07
-- Propósito: Crear tablas internas para registro detallado de drones

-- ============================================================================
-- Tabla 1: dron_logs - Logs detallados de cada dron
-- ============================================================================

CREATE TABLE IF NOT EXISTS bitacoras.dron_logs (
    id              SERIAL PRIMARY KEY,
    dron_id         VARCHAR(50) NOT NULL,        -- ej: dron_083045_123
    flujo_id        VARCHAR(50),                  -- ID de orquestación (si aplica)
    tipo            VARCHAR(20) NOT NULL,         -- ejecutor|vigilante|sanador|planificador|mensajero|orquestador
    estado          VARCHAR(20) NOT NULL,         -- pending|running|completed|failed|zombie
    cmd             TEXT,                         -- Comando ejecutado
    output          TEXT,                         -- Salida del comando
    exit_code       INTEGER,                      -- Código de retorno
    started_at      TIMESTAMP DEFAULT NOW(),
    completed_at    TIMESTAMP,
    heartbeat       TIMESTAMP DEFAULT NOW(),      -- Último heartbeat
    reintentos      INTEGER DEFAULT 0,
    metadata        JSONB DEFAULT '{}'::jsonb,    -- Metadata adicional
    created_at      TIMESTAMP DEFAULT NOW(),
    updated_at      TIMESTAMP DEFAULT NOW()
);

-- Índices para consultas eficientes
CREATE INDEX IF NOT EXISTS idx_dron_logs_estado ON bitacoras.dron_logs(estado);
CREATE INDEX IF NOT EXISTS idx_dron_logs_heartbeat ON bitacoras.dron_logs(heartbeat);
CREATE INDEX IF NOT EXISTS idx_dron_logs_flujo ON bitacoras.dron_logs(flujo_id);
CREATE INDEX IF NOT EXISTS idx_dron_logs_tipo ON bitacoras.dron_logs(tipo);
CREATE INDEX IF NOT EXISTS idx_dron_logs_started_at ON bitacoras.dron_logs(started_at);

-- ============================================================================
-- Tabla 2: dron_avances - Avances paso-a-paso (para flujos multi-paso)
-- ============================================================================

CREATE TABLE IF NOT EXISTS bitacoras.dron_avances (
    id              SERIAL PRIMARY KEY,
    dron_id         VARCHAR(50) NOT NULL,
    flujo_id        VARCHAR(50),                  -- ID de orquestación
    paso            INTEGER NOT NULL,             -- Número de paso en flujo
    descripcion     TEXT NOT NULL,                -- Qué se está haciendo
    estado          VARCHAR(20) NOT NULL,         -- pending|running|completed|failed
    output          TEXT,                         -- Salida del paso
    started_at      TIMESTAMP DEFAULT NOW(),
    completed_at    TIMESTAMP,
    metadata        JSONB DEFAULT '{}'::jsonb,
    created_at      TIMESTAMP DEFAULT NOW()
);

-- Índices para consultas eficientes
CREATE INDEX IF NOT EXISTS idx_dron_avances_dron ON bitacoras.dron_avances(dron_id);
CREATE INDEX IF NOT EXISTS idx_dron_avances_flujo ON bitacoras.dron_avances(flujo_id);
CREATE INDEX IF NOT EXISTS idx_dron_avances_paso ON bitacoras.dron_avances(paso);

-- ============================================================================
-- Tabla 3: dron_metricas - Métricas de rendimiento (agregaciones diarias)
-- ============================================================================

CREATE TABLE IF NOT EXISTS bitacoras.dron_metricas (
    id              SERIAL PRIMARY KEY,
    fecha           DATE NOT NULL,
    dron_tipo       VARCHAR(20) NOT NULL,
    total_ejecuciones INTEGER DEFAULT 0,
    completados     INTEGER DEFAULT 0,
    fallidos        INTEGER DEFAULT 0,
    zombies         INTEGER DEFAULT 0,
    tiempo_promedio INTERVAL DEFAULT '0 seconds',
    reintentos_total INTEGER DEFAULT 0,
    created_at      TIMESTAMP DEFAULT NOW(),
    updated_at      TIMESTAMP DEFAULT NOW(),
    UNIQUE(fecha, dron_tipo)
);

-- Índice para consultas por fecha
CREATE INDEX IF NOT EXISTS idx_dron_metricas_fecha ON bitacoras.dron_metricas(fecha);

-- ============================================================================
-- Trigger: Actualizar updated_at automáticamente
-- ============================================================================

-- Función para actualizar updated_at
CREATE OR REPLACE FUNCTION bitacoras.update_updated_at_column()
RETURNS TRIGGER AS $$
BEGIN
    NEW.updated_at = NOW();
    RETURN NEW;
END;
$$ LANGUAGE plpgsql;

-- Trigger para dron_logs
DROP TRIGGER IF EXISTS update_dron_logs_updated_at ON bitacoras.dron_logs;
CREATE TRIGGER update_dron_logs_updated_at
    BEFORE UPDATE ON bitacoras.dron_logs
    FOR EACH ROW
    EXECUTE FUNCTION bitacoras.update_updated_at_column();

-- Trigger para dron_metricas
DROP TRIGGER IF EXISTS update_dron_metricas_updated_at ON bitacoras.dron_metricas;
CREATE TRIGGER update_dron_metricas_updated_at
    BEFORE UPDATE ON bitacoras.dron_metricas
    FOR EACH ROW
    EXECUTE FUNCTION bitacoras.update_updated_at_column();

-- ============================================================================
-- Comentario de documentación
-- ============================================================================

COMMENT ON TABLE bitacoras.dron_logs IS 'Logs detallados de cada dron en la colonia (NO visible directamente en Bitácora Web)';
COMMENT ON TABLE bitacoras.dron_avances IS 'Avances paso-a-paso de flujos multi-paso (orquestación)';
COMMENT ON TABLE bitacoras.dron_metricas IS 'Métricas agregadas diarias por tipo de dron (para dashboard y estadísticas)';

COMMENT ON COLUMN bitacoras.dron_logs.dron_id IS 'Identificador único del dron (ej: dron_083045_123)';
COMMENT ON COLUMN bitacoras.dron_logs.flujo_id IS 'ID de orquestación para agrupar drones de un mismo flujo';
COMMENT ON COLUMN bitacoras.dron_logs.tipo IS 'Tipo de dron: ejecutor, vigilante, sanador, planificador, mensajero, orquestador';
COMMENT ON COLUMN bitacoras.dron_logs.estado IS 'Estado actual: pending, running, completed, failed, zombie';
COMMENT ON COLUMN bitacoras.dron_logs.heartbeat IS 'Último heartbeat - si > 5min, dron se considera zombie';

-- ============================================================================
-- Vistas útiles para consultas frecuentes
-- ============================================================================

-- Vista: Drones activos por estado
CREATE OR REPLACE VIEW bitacoras.vw_dron_estado AS
SELECT
    estado,
    tipo,
    COUNT(*) as cantidad,
    MIN(started_at) as mas_antiguo,
    MAX(started_at) as mas_reciente
FROM bitacoras.dron_logs
WHERE estado IN ('running', 'pending')
GROUP BY estado, tipo;

-- Vista: Drones zombies (heartbeat > 5min)
CREATE OR REPLACE VIEW bitacoras.vw_dron_zombies AS
SELECT
    id,
    dron_id,
    tipo,
    cmd,
    started_at,
    heartbeat,
    EXTRACT(EPOCH FROM (NOW() - heartbeat))/60 as minutos_sin_heartbeat
FROM bitacoras.dron_logs
WHERE estado = 'running'
  AND heartbeat < NOW() - INTERVAL '5 minutes';

-- Vista: Métricas de los últimos 7 días
CREATE OR REPLACE VIEW bitacoras.vw_dron_metricas_semanal AS
SELECT
    fecha,
    dron_tipo,
    total_ejecuciones,
    completados,
    fallidos,
    zombies,
    tiempo_promedio,
    reintentos_total,
    ROUND(100.0 * completados / NULLIF(total_ejecuciones, 0), 2) as tasa_exito
FROM bitacoras.dron_metricas
WHERE fecha >= CURRENT_DATE - INTERVAL '7 days'
ORDER BY fecha DESC, dron_tipo;

-- ============================================================================
-- Mensaje de confirmación
-- ============================================================================

DO $$
BEGIN
    RAISE NOTICE '✅ Migración 003 completada: Tablas de Drones creadas exitosamente';
    RAISE NOTICE '   - bitacoras.dron_logs: Logs detallados';
    RAISE NOTICE '   - bitacoras.dron_avances: Avances paso-a-paso';
    RAISE NOTICE '   - bitacoras.dron_metricas: Métricas agregadas';
    RAISE NOTICE '   - Vistas: vw_dron_estado, vw_dron_zombies, vw_dron_metricas_semanal';
END $$;