# frozen_string_literal: true

# Migration: 003 - Tablas para sistema de Drones (AtomicDrones)
#
# Usage:
#   ruby adn/tools/db/migrations/003_create_dron_tables.rb
#
# Propósito: Crear tablas internas para registro detallado de drones
# - dron_logs: Logs detallados de cada dron
# - dron_avances: Avances paso-a-paso de flujos multi-paso
# - dron_metricas: Métricas agregadas diarias por tipo de dron

require_relative '../core/bitacora_db'

puts "🔧 Running migration 003: Create dron tables"

BitacorasDB::BitacoraDB.with_connection do |db|
  # ============================================================================
  # Tabla 1: dron_logs
  # ============================================================================

  puts "\n📝 Creando tabla bitacoras.dron_logs..."

  db.execute(<<~SQL)
    CREATE TABLE IF NOT EXISTS bitacoras.dron_logs (
      id              SERIAL PRIMARY KEY,
      dron_id         VARCHAR(50) NOT NULL,
      flujo_id        VARCHAR(50),
      tipo            VARCHAR(20) NOT NULL,
      estado          VARCHAR(20) NOT NULL,
      cmd             TEXT,
      output          TEXT,
      exit_code       INTEGER,
      started_at      TIMESTAMP DEFAULT NOW(),
      completed_at    TIMESTAMP,
      heartbeat       TIMESTAMP DEFAULT NOW(),
      reintentos      INTEGER DEFAULT 0,
      metadata        JSONB DEFAULT '{}'::jsonb,
      created_at      TIMESTAMP DEFAULT NOW(),
      updated_at      TIMESTAMP DEFAULT NOW()
    )
  SQL
  puts "✅ Tabla bitacoras.dron_logs creada"

  # Índices para dron_logs
  indices_dron_logs = [
    ["idx_dron_logs_estado", "CREATE INDEX IF NOT EXISTS idx_dron_logs_estado ON bitacoras.dron_logs(estado)"],
    ["idx_dron_logs_heartbeat", "CREATE INDEX IF NOT EXISTS idx_dron_logs_heartbeat ON bitacoras.dron_logs(heartbeat)"],
    ["idx_dron_logs_flujo", "CREATE INDEX IF NOT EXISTS idx_dron_logs_flujo ON bitacoras.dron_logs(flujo_id)"],
    ["idx_dron_logs_tipo", "CREATE INDEX IF NOT EXISTS idx_dron_logs_tipo ON bitacoras.dron_logs(tipo)"],
    ["idx_dron_logs_started_at", "CREATE INDEX IF NOT EXISTS idx_dron_logs_started_at ON bitacoras.dron_logs(started_at)"]
  ]

  indices_dron_logs.each do |nombre, sql|
    db.execute(sql)
    puts "📈 Índice creado: #{nombre}"
  end

  # ============================================================================
  # Tabla 2: dron_avances
  # ============================================================================

  puts "\n📝 Creando tabla bitacoras.dron_avances..."

  db.execute(<<~SQL)
    CREATE TABLE IF NOT EXISTS bitacoras.dron_avances (
      id              SERIAL PRIMARY KEY,
      dron_id         VARCHAR(50) NOT NULL,
      flujo_id        VARCHAR(50),
      paso            INTEGER NOT NULL,
      descripcion     TEXT NOT NULL,
      estado          VARCHAR(20) NOT NULL,
      output          TEXT,
      started_at      TIMESTAMP DEFAULT NOW(),
      completed_at    TIMESTAMP,
      metadata        JSONB DEFAULT '{}'::jsonb,
      created_at      TIMESTAMP DEFAULT NOW()
    )
  SQL
  puts "✅ Tabla bitacoras.dron_avances creada"

  # Índices para dron_avances
  indices_dron_avances = [
    ["idx_dron_avances_dron", "CREATE INDEX IF NOT EXISTS idx_dron_avances_dron ON bitacoras.dron_avances(dron_id)"],
    ["idx_dron_avances_flujo", "CREATE INDEX IF NOT EXISTS idx_dron_avances_flujo ON bitacoras.dron_avances(flujo_id)"],
    ["idx_dron_avances_paso", "CREATE INDEX IF NOT EXISTS idx_dron_avances_paso ON bitacoras.dron_avances(paso)"]
  ]

  indices_dron_avances.each do |nombre, sql|
    db.execute(sql)
    puts "📈 Índice creado: #{nombre}"
  end

  # ============================================================================
  # Tabla 3: dron_metricas
  # ============================================================================

  puts "\n📝 Creando tabla bitacoras.dron_metricas..."

  db.execute(<<~SQL)
    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)
    )
  SQL
  puts "✅ Tabla bitacoras.dron_metricas creada"

  # Índices para dron_metricas
  db.execute("CREATE INDEX IF NOT EXISTS idx_dron_metricas_fecha ON bitacoras.dron_metricas(fecha)")
  puts "📈 Índice creado: idx_dron_metricas_fecha"

  # ============================================================================
  # Trigger para actualizar updated_at
  # ============================================================================

  puts "\n📝 Creando trigger para actualizar updated_at..."

  db.execute(<<~SQL)
    CREATE OR REPLACE FUNCTION bitacoras.update_updated_at_column()
    RETURNS TRIGGER AS $$
    BEGIN
        NEW.updated_at = NOW();
        RETURN NEW;
    END;
    $$ LANGUAGE plpgsql
  SQL
  puts "✅ Función update_updated_at_column creada"

  # Triggers para cada tabla
  triggers = [
    ["update_dron_logs_updated_at", "dron_logs"],
    ["update_dron_metricas_updated_at", "dron_metricas"]
  ]

  triggers.each do |nombre_trigger, tabla|
    db.execute("DROP TRIGGER IF EXISTS #{nombre_trigger} ON bitacoras.#{tabla}")
    db.execute(<<~SQL)
      CREATE TRIGGER #{nombre_trigger}
          BEFORE UPDATE ON bitacoras.#{tabla}
          FOR EACH ROW
          EXECUTE FUNCTION bitacoras.update_updated_at_column()
    SQL
    puts "📈 Trigger creado: #{nombre_trigger} en #{tabla}"
  end

  # ============================================================================
  # Vistas útiles
  # ============================================================================

  puts "\n📝 Creando vistas útiles..."

  # Vista: Drones activos por estado
  db.execute(<<~SQL)
    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
  SQL
  puts "✅ Vista creada: vw_dron_estado"

  # Vista: Drones zombies
  db.execute(<<~SQL)
    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'
  SQL
  puts "✅ Vista creada: vw_dron_zombies"

  # Vista: Métricas semanales
  db.execute(<<~SQL)
    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
  SQL
  puts "✅ Vista creada: vw_dron_metricas_semanal"

  # ============================================================================
  # Comentarios de documentación
  # ============================================================================

  puts "\n📝 Agregando comentarios de documentación..."

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

puts "\n🎉 Migration 003 completed successfully!"
puts "\nResumen:"
puts "  - bitacoras.dron_logs: Logs detallados"
puts "  - bitacoras.dron_avances: Avances paso-a-paso"
puts "  - bitacoras.dron_metricas: Métricas agregadas"
puts "  - Vistas: vw_dron_estado, vw_dron_zombies, vw_dron_metricas_semanal"
puts "\n🏁 Migration finished."