-- project.linkedcorp.net — esquema inicial (MVP). Idempotente: seguro correr sobre BD existente.
SET NAMES utf8mb4;

CREATE TABLE IF NOT EXISTS roles (
  id INT AUTO_INCREMENT PRIMARY KEY,
  code VARCHAR(30) NOT NULL UNIQUE,
  name VARCHAR(80) NOT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

CREATE TABLE IF NOT EXISTS departments (
  id INT AUTO_INCREMENT PRIMARY KEY,
  name VARCHAR(120) NOT NULL,
  parent_id INT NULL,
  created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
  CONSTRAINT fk_departments_parent FOREIGN KEY (parent_id) REFERENCES departments(id) ON DELETE SET NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

CREATE TABLE IF NOT EXISTS users (
  id INT AUTO_INCREMENT PRIMARY KEY,
  name VARCHAR(120) NOT NULL,
  email VARCHAR(160) NOT NULL UNIQUE,
  password_hash VARCHAR(120) NOT NULL,
  role_id INT NOT NULL,
  department_id INT NULL,
  position VARCHAR(120) NULL,
  is_active TINYINT(1) 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_users_role FOREIGN KEY (role_id) REFERENCES roles(id),
  CONSTRAINT fk_users_department FOREIGN KEY (department_id) REFERENCES departments(id) ON DELETE SET NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

CREATE TABLE IF NOT EXISTS project_types (
  id INT AUTO_INCREMENT PRIMARY KEY,
  name VARCHAR(80) NOT NULL UNIQUE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

CREATE TABLE IF NOT EXISTS priorities (
  id INT AUTO_INCREMENT PRIMARY KEY,
  name VARCHAR(40) NOT NULL UNIQUE,
  level INT NOT NULL,
  color VARCHAR(20) NOT NULL DEFAULT 'accent'
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

CREATE TABLE IF NOT EXISTS project_statuses (
  id INT AUTO_INCREMENT PRIMARY KEY,
  name VARCHAR(60) NOT NULL UNIQUE,
  sort_order INT NOT NULL DEFAULT 0,
  color VARCHAR(20) NOT NULL DEFAULT 'accent',
  is_closed TINYINT(1) NOT NULL DEFAULT 0
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

CREATE TABLE IF NOT EXISTS activity_statuses (
  id INT AUTO_INCREMENT PRIMARY KEY,
  name VARCHAR(60) NOT NULL UNIQUE,
  sort_order INT NOT NULL DEFAULT 0,
  color VARCHAR(20) NOT NULL DEFAULT 'accent',
  is_closed TINYINT(1) NOT NULL DEFAULT 0
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

CREATE TABLE IF NOT EXISTS projects (
  id INT AUTO_INCREMENT PRIMARY KEY,
  code VARCHAR(20) NOT NULL UNIQUE,
  name VARCHAR(160) NOT NULL,
  description TEXT NULL,
  objective TEXT NULL,
  project_type_id INT NULL,
  priority_id INT NOT NULL,
  status_id INT NOT NULL,
  owner_user_id INT NOT NULL,
  requesting_department_id INT NULL,
  responsible_department_id INT NULL,
  start_date DATE NULL,
  estimated_end_date DATE NULL,
  actual_end_date DATE NULL,
  progress_pct DECIMAL(5,2) NOT NULL DEFAULT 0,
  risk_level ENUM('low','medium','high') NOT NULL DEFAULT 'low',
  notes TEXT NULL,
  created_by INT NOT NULL,
  created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
  updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  CONSTRAINT fk_projects_type FOREIGN KEY (project_type_id) REFERENCES project_types(id) ON DELETE SET NULL,
  CONSTRAINT fk_projects_priority FOREIGN KEY (priority_id) REFERENCES priorities(id),
  CONSTRAINT fk_projects_status FOREIGN KEY (status_id) REFERENCES project_statuses(id),
  CONSTRAINT fk_projects_owner FOREIGN KEY (owner_user_id) REFERENCES users(id),
  CONSTRAINT fk_projects_req_dept FOREIGN KEY (requesting_department_id) REFERENCES departments(id) ON DELETE SET NULL,
  CONSTRAINT fk_projects_resp_dept FOREIGN KEY (responsible_department_id) REFERENCES departments(id) ON DELETE SET NULL,
  CONSTRAINT fk_projects_created_by FOREIGN KEY (created_by) REFERENCES users(id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

CREATE TABLE IF NOT EXISTS project_members (
  project_id INT NOT NULL,
  user_id INT NOT NULL,
  role_in_project VARCHAR(60) NULL,
  added_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
  PRIMARY KEY (project_id, user_id),
  CONSTRAINT fk_pm_project FOREIGN KEY (project_id) REFERENCES projects(id) ON DELETE CASCADE,
  CONSTRAINT fk_pm_user FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

CREATE TABLE IF NOT EXISTS activities (
  id INT AUTO_INCREMENT PRIMARY KEY,
  project_id INT NOT NULL,
  code VARCHAR(20) NOT NULL UNIQUE,
  name VARCHAR(160) NOT NULL,
  description TEXT NULL,
  responsible_user_id INT NULL,
  priority_id INT NOT NULL,
  status_id INT NOT NULL,
  start_date DATE NULL,
  due_date DATE NULL,
  actual_end_date DATE NULL,
  progress_pct DECIMAL(5,2) NOT NULL DEFAULT 0,
  is_milestone TINYINT(1) NOT NULL DEFAULT 0,
  estimated_hours DECIMAL(6,2) NULL,
  created_by INT NOT NULL,
  created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
  updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  CONSTRAINT fk_activities_project FOREIGN KEY (project_id) REFERENCES projects(id) ON DELETE CASCADE,
  CONSTRAINT fk_activities_responsible FOREIGN KEY (responsible_user_id) REFERENCES users(id) ON DELETE SET NULL,
  CONSTRAINT fk_activities_priority FOREIGN KEY (priority_id) REFERENCES priorities(id),
  CONSTRAINT fk_activities_status FOREIGN KEY (status_id) REFERENCES activity_statuses(id),
  CONSTRAINT fk_activities_created_by FOREIGN KEY (created_by) REFERENCES users(id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

CREATE TABLE IF NOT EXISTS activity_dependencies (
  activity_id INT NOT NULL,
  depends_on_activity_id INT NOT NULL,
  created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
  PRIMARY KEY (activity_id, depends_on_activity_id),
  CONSTRAINT fk_dep_activity FOREIGN KEY (activity_id) REFERENCES activities(id) ON DELETE CASCADE,
  CONSTRAINT fk_dep_depends_on FOREIGN KEY (depends_on_activity_id) REFERENCES activities(id) ON DELETE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

CREATE TABLE IF NOT EXISTS tasks (
  id INT AUTO_INCREMENT PRIMARY KEY,
  activity_id INT NOT NULL,
  name VARCHAR(160) NOT NULL,
  responsible_user_id INT NULL,
  is_done TINYINT(1) NOT NULL DEFAULT 0,
  due_date DATE NULL,
  created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
  updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  CONSTRAINT fk_tasks_activity FOREIGN KEY (activity_id) REFERENCES activities(id) ON DELETE CASCADE,
  CONSTRAINT fk_tasks_responsible FOREIGN KEY (responsible_user_id) REFERENCES users(id) ON DELETE SET NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

CREATE TABLE IF NOT EXISTS comments (
  id INT AUTO_INCREMENT PRIMARY KEY,
  entity_type ENUM('project','activity') NOT NULL,
  entity_id INT NOT NULL,
  user_id INT NOT NULL,
  message TEXT NOT NULL,
  created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
  CONSTRAINT fk_comments_user FOREIGN KEY (user_id) REFERENCES users(id),
  INDEX idx_comments_entity (entity_type, entity_id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

CREATE TABLE IF NOT EXISTS attachments (
  id INT AUTO_INCREMENT PRIMARY KEY,
  entity_type ENUM('project','activity') NOT NULL,
  entity_id INT NOT NULL,
  filename VARCHAR(255) NOT NULL,
  original_name VARCHAR(255) NOT NULL,
  mime_type VARCHAR(120) NOT NULL,
  size INT NOT NULL,
  uploaded_by INT NOT NULL,
  created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
  CONSTRAINT fk_attachments_user FOREIGN KEY (uploaded_by) REFERENCES users(id),
  INDEX idx_attachments_entity (entity_type, entity_id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

CREATE TABLE IF NOT EXISTS notifications (
  id INT AUTO_INCREMENT PRIMARY KEY,
  user_id INT NOT NULL,
  type VARCHAR(60) NOT NULL,
  message VARCHAR(255) NOT NULL,
  entity_type ENUM('project','activity') NULL,
  entity_id INT NULL,
  is_read TINYINT(1) NOT NULL DEFAULT 0,
  created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
  CONSTRAINT fk_notifications_user FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE,
  INDEX idx_notifications_user (user_id, is_read)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

CREATE TABLE IF NOT EXISTS audit_log (
  id INT AUTO_INCREMENT PRIMARY KEY,
  user_id INT NULL,
  action VARCHAR(60) NOT NULL,
  entity_type VARCHAR(40) NOT NULL,
  entity_id INT NULL,
  detail_json JSON NULL,
  created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
  CONSTRAINT fk_audit_user FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE SET NULL,
  INDEX idx_audit_entity (entity_type, entity_id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;