-- Tasks plugin initial migration: creates tasks table
CREATE TABLE IF NOT EXISTS tasks (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    tenant_id UUID NOT NULL,
    title VARCHAR(255) NOT NULL,
    description TEXT,
    status VARCHAR(20) NOT NULL DEFAULT 'open',
    priority VARCHAR(10) NOT NULL DEFAULT 'medium',
    due_date TIMESTAMPTZ,
    assigned_to UUID REFERENCES users(id) ON DELETE SET NULL,
    contact_id UUID REFERENCES contacts(id) ON DELETE SET NULL,
    created_by UUID REFERENCES users(id) ON DELETE SET NULL,
    created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    deleted_at TIMESTAMPTZ
);
CREATE INDEX IF NOT EXISTS ix_tasks_tenant_deleted ON tasks(tenant_id, deleted_at);
CREATE INDEX IF NOT EXISTS ix_tasks_tenant_status ON tasks(tenant_id, status);
CREATE INDEX IF NOT EXISTS ix_tasks_tenant_assigned ON tasks(tenant_id, assigned_to);
CREATE INDEX IF NOT EXISTS ix_tasks_tenant_due ON tasks(tenant_id, due_date);
CREATE INDEX IF NOT EXISTS ix_tasks_contact ON tasks(contact_id);