-- Default-off, organization-wide task-summary subscriptions for team leads.
-- This is a read-only projection: it never grants task mutation or ERP
-- execution authority and it does not reuse employee AgentBus reply rows.

CREATE UNIQUE INDEX IF NOT EXISTS user_channels_organization_id_id_notification_idx
  ON user_channels (organization_id, id);

CREATE UNIQUE INDEX IF NOT EXISTS tasks_organization_id_id_notification_idx
  ON tasks (organization_id, id);

CREATE INDEX IF NOT EXISTS outbox_events_leader_summary_projection_idx
  ON outbox_events (organization_id, aggregate_id, created_at DESC)
  WHERE topic = 'task.updated' AND aggregate_type = 'task';

CREATE INDEX IF NOT EXISTS tasks_leader_summary_projection_idx
  ON tasks (organization_id, source, status, assigned_user_id, id)
  WHERE assigned_user_id IS NOT NULL;

CREATE TABLE IF NOT EXISTS leader_task_summary_subscriptions (
  id uuid PRIMARY KEY DEFAULT gen_random_uuid(),
  organization_id uuid NOT NULL REFERENCES organizations(id) ON DELETE CASCADE,
  leader_user_id uuid NOT NULL,
  channel_id uuid NOT NULL,
  scope text NOT NULL DEFAULT 'organization',
  include_manual boolean NOT NULL DEFAULT true,
  include_agentbus boolean NOT NULL DEFAULT true,
  enabled boolean NOT NULL DEFAULT false,
  starts_at timestamptz NOT NULL DEFAULT now(),
  revision integer NOT NULL DEFAULT 0,
  recipient_address_ciphertext text NOT NULL,
  recipient_address_fingerprint text NOT NULL,
  conversation_id_ciphertext text NOT NULL,
  conversation_id_fingerprint text NOT NULL,
  target_verified_at timestamptz,
  target_verified_by uuid REFERENCES users(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(),
  CONSTRAINT leader_task_summary_subscriptions_scope_check
    CHECK (scope = 'organization'),
  CONSTRAINT leader_task_summary_subscriptions_sources_check
    CHECK (include_manual OR include_agentbus),
  CONSTRAINT leader_task_summary_subscriptions_revision_check
    CHECK (revision >= 0),
  CONSTRAINT leader_task_summary_subscriptions_recipient_fingerprint_check
    CHECK (recipient_address_fingerprint ~ '^[a-f0-9]{64}$'),
  CONSTRAINT leader_task_summary_subscriptions_conversation_fingerprint_check
    CHECK (conversation_id_fingerprint ~ '^[a-f0-9]{64}$'),
  CONSTRAINT leader_task_summary_subscriptions_leader_scope_fkey
    FOREIGN KEY (organization_id, leader_user_id)
    REFERENCES users (organization_id, id)
    ON DELETE CASCADE,
  CONSTRAINT leader_task_summary_subscriptions_channel_scope_fkey
    FOREIGN KEY (organization_id, channel_id)
    REFERENCES user_channels (organization_id, id)
    ON DELETE CASCADE,
  UNIQUE (organization_id, leader_user_id)
);

CREATE INDEX IF NOT EXISTS leader_task_summary_subscriptions_active_idx
  ON leader_task_summary_subscriptions
    (organization_id, enabled, starts_at, channel_id)
  WHERE enabled = true;

CREATE UNIQUE INDEX IF NOT EXISTS leader_task_summary_subscriptions_organization_id_id_idx
  ON leader_task_summary_subscriptions (organization_id, id);

CREATE TABLE IF NOT EXISTS leader_task_summary_deliveries (
  id uuid PRIMARY KEY DEFAULT gen_random_uuid(),
  organization_id uuid NOT NULL REFERENCES organizations(id) ON DELETE CASCADE,
  subscription_id uuid NOT NULL,
  subscription_revision integer NOT NULL,
  task_id uuid NOT NULL,
  leader_user_id uuid NOT NULL,
  channel_id uuid NOT NULL,
  source_outbox_event_id bigint NOT NULL,
  milestone text NOT NULL,
  recipient_address_ciphertext text NOT NULL,
  recipient_address_fingerprint text NOT NULL,
  conversation_id_ciphertext text NOT NULL,
  conversation_id_fingerprint text NOT NULL,
  payload_ciphertext text NOT NULL,
  payload_fingerprint text NOT NULL,
  delivery_status text NOT NULL DEFAULT 'pending',
  attempt_count integer NOT NULL DEFAULT 0,
  next_attempt_at timestamptz NOT NULL DEFAULT now(),
  last_error text,
  delivered_at timestamptz,
  created_at timestamptz NOT NULL DEFAULT now(),
  updated_at timestamptz NOT NULL DEFAULT now(),
  CONSTRAINT leader_task_summary_deliveries_milestone_check
    CHECK (milestone IN ('final', 'needs_review', 'resolved')),
  CONSTRAINT leader_task_summary_deliveries_status_check
    CHECK (delivery_status IN ('pending', 'sending', 'delivered', 'failed', 'cancelled')),
  CONSTRAINT leader_task_summary_deliveries_attempt_check
    CHECK (attempt_count >= 0),
  CONSTRAINT leader_task_summary_deliveries_revision_check
    CHECK (subscription_revision >= 0),
  CONSTRAINT leader_task_summary_deliveries_payload_fingerprint_check
    CHECK (payload_fingerprint ~ '^[a-f0-9]{64}$'),
  CONSTRAINT leader_task_summary_deliveries_recipient_fingerprint_check
    CHECK (recipient_address_fingerprint ~ '^[a-f0-9]{64}$'),
  CONSTRAINT leader_task_summary_deliveries_conversation_fingerprint_check
    CHECK (conversation_id_fingerprint ~ '^[a-f0-9]{64}$'),
  CONSTRAINT leader_task_summary_deliveries_subscription_scope_fkey
    FOREIGN KEY (organization_id, subscription_id)
    REFERENCES leader_task_summary_subscriptions (organization_id, id)
    ON DELETE CASCADE,
  CONSTRAINT leader_task_summary_deliveries_task_scope_fkey
    FOREIGN KEY (organization_id, task_id)
    REFERENCES tasks (organization_id, id)
    ON DELETE CASCADE,
  CONSTRAINT leader_task_summary_deliveries_leader_scope_fkey
    FOREIGN KEY (organization_id, leader_user_id)
    REFERENCES users (organization_id, id)
    ON DELETE CASCADE,
  CONSTRAINT leader_task_summary_deliveries_channel_scope_fkey
    FOREIGN KEY (organization_id, channel_id)
    REFERENCES user_channels (organization_id, id)
    ON DELETE CASCADE,
  UNIQUE (subscription_id, subscription_revision, task_id, milestone)
);

CREATE INDEX IF NOT EXISTS leader_task_summary_deliveries_pending_idx
  ON leader_task_summary_deliveries
    (channel_id, delivery_status, next_attempt_at, created_at, id)
  WHERE delivery_status IN ('pending', 'sending', 'failed');

CREATE INDEX IF NOT EXISTS leader_task_summary_deliveries_task_idx
  ON leader_task_summary_deliveries
    (organization_id, task_id, leader_user_id, created_at DESC);