-- name: InsertOutboundOperation :one
INSERT INTO outbound_operations (
  account_id, swt_sid, event_id, operation, payload, occurred_at
) VALUES (?, ?, ?, ?, ?, ?)
ON CONFLICT(event_id) DO NOTHING
RETURNING *;

-- name: GetOutboundOperationByEventID :one
SELECT * FROM outbound_operations
WHERE event_id = ?
LIMIT 1;

-- name: ClaimOutboundOperation :one
UPDATE outbound_operations SET
  delivery_status = 'delivering',
  claimed_at = CURRENT_TIMESTAMP,
  attempts = attempts + 1,
  updated_at = CURRENT_TIMESTAMP
WHERE id = (
  SELECT candidate.id
  FROM outbound_operations AS candidate
  JOIN accounts AS account ON account.id = candidate.account_id
  WHERE candidate.delivery_status = 'pending'
    AND account.enabled = 1
    AND account.desired_presence <> 'offline'
    AND account.deleted_at IS NULL
    AND (candidate.next_attempt_at IS NULL OR julianday(candidate.next_attempt_at) IS NULL OR julianday(candidate.next_attempt_at) <= julianday('now'))
    AND NOT EXISTS (
      SELECT 1 FROM outbound_operations AS earlier
      WHERE earlier.account_id = candidate.account_id
        AND earlier.id < candidate.id
        AND earlier.delivery_status IN ('pending', 'delivering', 'uncertain')
    )
    AND NOT EXISTS (
      SELECT 1 FROM outbound_messages AS active_message
      WHERE active_message.account_id = candidate.account_id
        AND active_message.delivery_status IN ('delivering', 'uncertain')
    )
    AND NOT EXISTS (
      SELECT 1 FROM outbound_messages AS earlier_message
      WHERE earlier_message.account_id = candidate.account_id
        AND earlier_message.delivery_status = 'pending'
        AND (
          julianday(earlier_message.occurred_at) < julianday(candidate.occurred_at) OR
          (julianday(earlier_message.occurred_at) = julianday(candidate.occurred_at) AND earlier_message.event_id < candidate.event_id)
        )
    )
  ORDER BY candidate.id
  LIMIT 1
)
AND delivery_status = 'pending'
RETURNING *;

-- name: CompleteOutboundOperation :exec
UPDATE outbound_operations SET
  delivery_status = 'delivered',
  claimed_at = NULL,
  last_error = NULL,
  updated_at = CURRENT_TIMESTAMP
WHERE id = ? AND delivery_status = 'delivering';

-- name: RetryOutboundOperation :exec
UPDATE outbound_operations SET
  delivery_status = 'pending',
  claimed_at = NULL,
  next_attempt_at = ?,
  last_error = ?,
  updated_at = CURRENT_TIMESTAMP
WHERE id = ? AND delivery_status = 'delivering';

-- name: MarkOutboundOperationUncertain :exec
UPDATE outbound_operations SET
  delivery_status = 'uncertain',
  claimed_at = NULL,
  last_error = ?,
  updated_at = CURRENT_TIMESTAMP
WHERE id = ? AND delivery_status = 'delivering';

-- name: FailOutboundOperation :exec
UPDATE outbound_operations SET
  delivery_status = 'failed',
  claimed_at = NULL,
  last_error = ?,
  updated_at = CURRENT_TIMESTAMP
WHERE id = ? AND delivery_status IN ('delivering', 'uncertain');

-- name: RecoverOutboundOperationsAsUncertain :execrows
UPDATE outbound_operations SET
  delivery_status = 'uncertain',
  claimed_at = NULL,
  last_error = 'connector restarted while operation was delivering',
  updated_at = CURRENT_TIMESTAMP
WHERE delivery_status = 'delivering';

-- name: FailExpiredUncertainOperations :execrows
UPDATE outbound_operations SET
  delivery_status = 'failed',
  claimed_at = NULL,
  last_error = 'operation result remained uncertain beyond the observation window',
  updated_at = CURRENT_TIMESTAMP
WHERE delivery_status = 'uncertain'
  AND julianday(updated_at) <= julianday(?);