-- Conexiones externas (conectores de solo lectura, contrato v1 en data/conectores/README.md),
-- empleados importados de nómina y vínculo de pacientes con el sistema origen. Idempotente.
SET NAMES utf8mb4;

CREATE TABLE IF NOT EXISTS external_connections (
  id INT AUTO_INCREMENT PRIMARY KEY,
  name VARCHAR(120) NOT NULL,
  base_url VARCHAR(255) NOT NULL,
  token_encrypted TEXT NOT NULL,
  is_active TINYINT(1) NOT NULL DEFAULT 1,
  created_by INT NULL,
  edit_version INT UNSIGNED NOT NULL DEFAULT 1,
  created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
  updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  CONSTRAINT fk_ext_conn_creator FOREIGN KEY (created_by) REFERENCES users(id) ON DELETE SET NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

-- Una fuente por destino: qué tabla del conector alimenta Pacientes o Empleados, cómo (importar o
-- consultar en vivo), el mapeo de campos y el estado de la última sincronización.
CREATE TABLE IF NOT EXISTS external_sources (
  id INT AUTO_INCREMENT PRIMARY KEY,
  purpose ENUM('patients','employees') NOT NULL UNIQUE,
  connection_id INT NOT NULL,
  source_key VARCHAR(64) NOT NULL,
  table_name VARCHAR(64) NOT NULL,
  mode ENUM('import','live') NOT NULL DEFAULT 'import',
  field_map_json TEXT NOT NULL,
  filter_json TEXT NULL,
  changed_field VARCHAR(64) NULL,
  last_full_sync_at DATETIME NULL,
  last_sync_at DATETIME NULL,
  last_max_recno INT UNSIGNED NULL,
  last_changed_value VARCHAR(40) NULL,
  last_result_json TEXT NULL,
  edit_version INT UNSIGNED NOT NULL DEFAULT 1,
  created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
  updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  CONSTRAINT fk_ext_source_conn FOREIGN KEY (connection_id) REFERENCES external_connections(id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

CREATE TABLE IF NOT EXISTS employees (
  id INT AUTO_INCREMENT PRIMARY KEY,
  identification VARCHAR(40) NOT NULL UNIQUE,
  last_names VARCHAR(120) NOT NULL DEFAULT '',
  first_names VARCHAR(120) NOT NULL DEFAULT '',
  phone VARCHAR(40) NULL,
  phone2 VARCHAR(40) NULL,
  birth_date DATE NULL,
  position VARCHAR(120) NULL,
  department_name VARCHAR(120) NULL,
  hire_date DATE NULL,
  leave_date DATE NULL,
  is_active TINYINT(1) NOT NULL DEFAULT 1,
  in_source TINYINT(1) NOT NULL DEFAULT 1,
  user_id INT NULL UNIQUE,
  synced_at DATETIME NULL,
  created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
  updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  INDEX idx_employee_name (last_names, first_names),
  CONSTRAINT fk_employee_user FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE SET NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

-- Tercera fuente: proveedores (médicos que facturan), para buscarlos y agregarlos como empleados.
ALTER TABLE external_sources MODIFY purpose ENUM('patients','employees','providers') NOT NULL;

-- Origen del empleado: nómina (se sincroniza) o proveedor de SAGA cargado a mano (médicos que facturan;
-- la sincronización de nómina no los inactiva). Correo: los proveedores lo tienen, la nómina no.
ALTER TABLE employees ADD COLUMN IF NOT EXISTS origin ENUM('payroll','provider') NOT NULL DEFAULT 'payroll' AFTER is_active;
ALTER TABLE employees ADD COLUMN IF NOT EXISTS email VARCHAR(160) NULL AFTER phone2;

-- Pacientes vinculados al origen (SAGA): source_name guarda el nombre tal como viene (SAGA no
-- separa nombres y apellidos ni respeta un orden); mientras recepción no lo separe a mano, el
-- nombre visible es ese. Manda el origen en identificación/teléfono/correo/nombre de origen.
ALTER TABLE clinic_patients ADD COLUMN IF NOT EXISTS external_source VARCHAR(20) NULL AFTER notes;
ALTER TABLE clinic_patients ADD COLUMN IF NOT EXISTS external_id VARCHAR(40) NULL AFTER external_source;
ALTER TABLE clinic_patients ADD COLUMN IF NOT EXISTS source_name VARCHAR(160) NULL AFTER external_id;
ALTER TABLE clinic_patients ADD COLUMN IF NOT EXISTS name_split TINYINT(1) NOT NULL DEFAULT 1 AFTER source_name;
ALTER TABLE clinic_patients ADD COLUMN IF NOT EXISTS synced_at DATETIME NULL AFTER name_split;
ALTER TABLE clinic_patients MODIFY phone VARCHAR(40) NOT NULL DEFAULT '';
CREATE UNIQUE INDEX IF NOT EXISTS uq_clinic_patient_external ON clinic_patients (external_source, external_id);