-- ==============================================================================
-- GAMILIT - SCHEMA CORE
-- ==============================================================================
-- Tablas fundamentales del sistema
-- Mantenido por: Database-Agent
-- Actualizado: 2025-12-18
-- ==============================================================================

-- ------------------------------------------------------------------------------
-- FUNCION PARA UPDATED_AT
-- ------------------------------------------------------------------------------
CREATE OR REPLACE FUNCTION update_updated_at_column()
RETURNS TRIGGER AS $$
BEGIN
    NEW.updated_at = CURRENT_TIMESTAMP;
    RETURN NEW;
END;
$$ language 'plpgsql';

-- ------------------------------------------------------------------------------
-- TABLA: TENANTS (Multi-tenancy)
-- ------------------------------------------------------------------------------
CREATE TABLE IF NOT EXISTS tenants (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    name VARCHAR(255) NOT NULL,
    slug VARCHAR(100) UNIQUE NOT NULL,
    settings JSONB DEFAULT '{}',
    status VARCHAR(50) DEFAULT 'active',
    created_at TIMESTAMPTZ DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMPTZ DEFAULT CURRENT_TIMESTAMP
);

CREATE INDEX idx_tenants_slug ON tenants(slug);
CREATE INDEX idx_tenants_status ON tenants(status);

CREATE TRIGGER update_tenants_updated_at
    BEFORE UPDATE ON tenants
    FOR EACH ROW
    EXECUTE FUNCTION update_updated_at_column();

-- ------------------------------------------------------------------------------
-- TABLA: ROLES
-- ------------------------------------------------------------------------------
CREATE TABLE IF NOT EXISTS roles (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    name VARCHAR(100) NOT NULL,
    description TEXT,
    permissions JSONB DEFAULT '[]',
    tenant_id UUID REFERENCES tenants(id) ON DELETE CASCADE,
    is_system BOOLEAN DEFAULT false,
    created_at TIMESTAMPTZ DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMPTZ DEFAULT CURRENT_TIMESTAMP,
    UNIQUE(name, tenant_id)
);

CREATE INDEX idx_roles_tenant ON roles(tenant_id);

CREATE TRIGGER update_roles_updated_at
    BEFORE UPDATE ON roles
    FOR EACH ROW
    EXECUTE FUNCTION update_updated_at_column();

-- ------------------------------------------------------------------------------
-- INSERTAR ROLES DEL SISTEMA
-- ------------------------------------------------------------------------------
INSERT INTO roles (name, description, permissions, is_system) VALUES
    ('admin', 'Administrador del sistema', '["*"]', true),
    ('instructor', 'Instructor de cursos', '["courses:*", "students:read"]', true),
    ('student', 'Estudiante', '["courses:read", "progress:*", "achievements:read"]', true)
ON CONFLICT DO NOTHING;