-- name: ListAgentRuntimes :many
SELECT * FROM agent_runtime
WHERE workspace_id = $1
ORDER BY created_at ASC;

-- name: GetAgentRuntime :one
SELECT * FROM agent_runtime
WHERE id = $1;

-- name: GetAgentRuntimeForWorkspace :one
SELECT * FROM agent_runtime
WHERE id = $1 AND workspace_id = $2;

-- name: UpsertAgentRuntime :one
-- (xmax = 0) AS inserted distinguishes a fresh insert (true) from an upsert
-- that updated an existing row (false). Analytics reads this to fire
-- runtime_registered/runtime_ready only on first-time registration.
--
-- @timezone is set on INSERT only. On conflict we deliberately KEEP the
-- existing agent_runtime.timezone — once an operator overrides the tz via
-- the web UI we don't want a daemon reconnect (which sends its own system
-- tz) to silently revert it. Daemons can still set the initial value when
-- they're the first to register a brand-new runtime row.
INSERT INTO agent_runtime (
    workspace_id,
    daemon_id,
    name,
    runtime_mode,
    provider,
    status,
    device_info,
    metadata,
    owner_id,
    timezone,
    last_seen_at
) VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9, @timezone, now())
ON CONFLICT (workspace_id, daemon_id, provider)
DO UPDATE SET
    name = EXCLUDED.name,
    runtime_mode = EXCLUDED.runtime_mode,
    status = EXCLUDED.status,
    device_info = EXCLUDED.device_info,
    metadata = EXCLUDED.metadata,
    owner_id = COALESCE(EXCLUDED.owner_id, agent_runtime.owner_id),
    last_seen_at = now(),
    updated_at = now()
RETURNING *, (xmax = 0) AS inserted;

-- name: LockTaskUsageDailyRollup :exec
-- Serialize explicit timezone rebuilds with rollup_task_usage_daily(), which
-- uses the same advisory key in migration 073. This prevents cron from
-- writing old-timezone buckets while PATCH is deleting/rebuilding rows.
SELECT pg_advisory_xact_lock(4242);

-- name: UpdateAgentRuntimeTimezone :one
-- Operator-driven override of the runtime's reporting timezone (MUL-1950).
UPDATE agent_runtime
SET timezone = @timezone, updated_at = now()
WHERE id = @id
RETURNING *;

-- name: DeleteTaskUsageDailyForRuntime :execrows
-- First step of an explicit user timezone edit rebuild. Delete old materialized
-- rows before re-inserting under the runtime's new timezone.
DELETE FROM task_usage_daily
WHERE runtime_id = $1;

-- name: DeleteTaskUsageDailyDirtyForRuntime :execrows
-- Drop queued dirty keys computed under the old timezone; the ordered rebuild
-- in the same transaction will write the current aggregate instead.
DELETE FROM task_usage_daily_dirty
WHERE runtime_id = $1;

-- name: InsertTaskUsageDailyForRuntime :execrows
-- Final step of an explicit user timezone edit rebuild. This is intentionally
-- called only for user edits, not by the migration itself: deploys do not
-- backfill history, but a user-driven change must not leave old UTC rows next
-- to newly computed local rows. This scans all history for the edited runtime;
-- timezone edits are owner/admin operations and are expected to be rare.
INSERT INTO task_usage_daily AS d (
    bucket_date, workspace_id, runtime_id, provider, model,
    input_tokens, output_tokens, cache_read_tokens, cache_write_tokens,
    event_count
)
SELECT
    DATE(tu.created_at AT TIME ZONE rt.timezone) AS bucket_date,
    a.workspace_id,
    atq.runtime_id,
    tu.provider,
    tu.model,
    SUM(tu.input_tokens)::bigint       AS input_tokens,
    SUM(tu.output_tokens)::bigint      AS output_tokens,
    SUM(tu.cache_read_tokens)::bigint  AS cache_read_tokens,
    SUM(tu.cache_write_tokens)::bigint AS cache_write_tokens,
    COUNT(*)::bigint                   AS event_count
  FROM task_usage tu
  JOIN agent_task_queue atq ON atq.id = tu.task_id
  JOIN agent            a   ON a.id = atq.agent_id
  JOIN agent_runtime    rt  ON rt.id = atq.runtime_id
 WHERE atq.runtime_id = $1
 GROUP BY 1, 2, 3, 4, 5
ON CONFLICT (bucket_date, workspace_id, runtime_id, provider, model) DO UPDATE
    SET input_tokens       = EXCLUDED.input_tokens,
        output_tokens      = EXCLUDED.output_tokens,
        cache_read_tokens  = EXCLUDED.cache_read_tokens,
        cache_write_tokens = EXCLUDED.cache_write_tokens,
        event_count        = EXCLUDED.event_count,
        updated_at         = now();

-- name: TouchAgentRuntimeLastSeen :execrows
-- Bumps last_seen_at on an already-online runtime. Deliberately does NOT
-- touch status or updated_at: status is unchanged on the hot heartbeat path,
-- and avoiding updated_at keeps the row HOT-eligible (no index columns
-- change) and avoids invalidating any downstream consumer that watches
-- updated_at.
--
-- The status='online' predicate is load-bearing: callers read rt.Status from
-- a prior SELECT and may race with the sweeper, which can flip the row to
-- offline between that SELECT and this UPDATE. Without the predicate this
-- query would silently leave a freshly-heartbeated runtime stuck in offline.
-- Returning affected rows lets callers detect that race and fall back to
-- MarkAgentRuntimeOnline to flip the row back online.
UPDATE agent_runtime
SET last_seen_at = now()
WHERE id = $1 AND status = 'online';

-- name: TouchAgentRuntimesLastSeenBatch :execrows
-- Bulk variant of TouchAgentRuntimeLastSeen used by the BatchedHeartbeatScheduler:
-- coalesces N per-runtime "bump last_seen_at" requests into a single UPDATE so a
-- fleet beating every 15s costs ~1 DB transaction per batch tick instead of N.
--
-- Same load-bearing predicate as the single-id form: status='online' avoids
-- silently un-deleting a sweeper-flipped offline row, and we deliberately do
-- NOT touch updated_at so the rows stay HOT-eligible. Affected-rows < len(ids)
-- means some IDs raced to offline between Schedule and flush; their next beat
-- will fall through the recordHeartbeat sync path and call MarkAgentRuntimeOnline.
UPDATE agent_runtime
SET last_seen_at = now()
WHERE id = ANY(@ids::uuid[]) AND status = 'online';

-- name: MarkAgentRuntimeOnline :one
-- Used on the offline→online transition (and on first heartbeat after
-- registration). Writes status, last_seen_at, and updated_at because the
-- status flip is a real state change and we want updated_at to reflect it.
UPDATE agent_runtime
SET status = 'online', last_seen_at = now(), updated_at = now()
WHERE id = $1
RETURNING *;

-- name: SetAgentRuntimeOffline :exec
UPDATE agent_runtime
SET status = 'offline', updated_at = now()
WHERE id = $1;

-- name: SelectStaleOnlineRuntimes :many
-- Lists online runtimes whose last_seen_at exceeds the stale window. The
-- sweeper uses this as a candidate set, then optionally filters via the
-- LivenessStore before flipping rows to offline (a fresh Redis liveness
-- record means the DB row is just lagging, not actually dead).
SELECT id, workspace_id, owner_id, daemon_id, provider FROM agent_runtime
WHERE status = 'online'
  AND last_seen_at < now() - make_interval(secs => @stale_seconds::double precision);

-- name: MarkRuntimesOfflineByIDs :many
-- Flips a known set of runtime IDs from online to offline. Paired with
-- SelectStaleOnlineRuntimes in the sweeper so the candidate selection and
-- the actual write are decoupled (the LivenessStore filter sits between).
--
-- Re-checks the stale predicate inside the UPDATE so a concurrent heartbeat
-- between the SELECT (candidate gather), the LivenessStore filter, and this
-- UPDATE cannot demote a runtime that just refreshed last_seen_at. The
-- legacy MarkStaleRuntimesOffline UPDATE had this property implicitly
-- because the predicate and the write lived in one statement; here we
-- carry it forward explicitly so the SELECT/filter/UPDATE pipeline retains
-- the same race-freedom.
UPDATE agent_runtime
SET status = 'offline', updated_at = now()
WHERE status = 'online'
  AND id = ANY(@ids::uuid[])
  AND last_seen_at < now() - make_interval(secs => @stale_seconds::double precision)
RETURNING id, workspace_id, owner_id, daemon_id, provider;

-- name: FailTasksForOfflineRuntimes :many
-- Marks dispatched/running tasks as failed when their runtime is offline.
-- This cleans up orphaned tasks after a daemon crash or network partition.
UPDATE agent_task_queue
SET status = 'failed', completed_at = now(), error = 'runtime went offline',
    failure_reason = 'runtime_offline'
WHERE status IN ('dispatched', 'running')
  AND runtime_id IN (
    SELECT id FROM agent_runtime WHERE status = 'offline'
  )
RETURNING *;

-- name: ListAgentRuntimesByOwner :many
SELECT * FROM agent_runtime
WHERE workspace_id = $1 AND owner_id = $2
ORDER BY created_at ASC;

-- name: ForceOfflineRuntimesByIDs :many
-- Unconditionally flips a known set of runtime IDs to offline. Distinct from
-- MarkRuntimesOfflineByIDs (which keeps a stale-window predicate so the
-- sweeper cannot demote a runtime that just heartbeated): this variant is
-- used by intentional revocation paths — e.g. removing a workspace member —
-- where the caller has already decided the runtime should be offline
-- regardless of recent liveness.
UPDATE agent_runtime
SET status = 'offline', updated_at = now()
WHERE id = ANY(@runtime_ids::uuid[]) AND status = 'online'
RETURNING id, workspace_id, owner_id, daemon_id, provider;

-- name: CancelAgentTasksByRuntimeOrAgent :many
-- Cancels every active task that either lives on one of the given runtimes
-- OR belongs to one of the given agents. Used by the member-revocation flow:
-- the runtime-side covers tasks queued against the leaving member's runtimes;
-- the agent-side covers tasks pinned to a different runtime that those agents
-- left behind from a prior UpdateAgent (agent.runtime_id can change, but
-- agent_task_queue.runtime_id does not get rewritten when it does, so a task
-- queued on runtime A by agent X — later moved to runtime B — survives the
-- runtime-only revoke and could still be claimed because ClaimAgentTask does
-- not gate on agent.archived_at).
--
-- We use 'cancelled' rather than 'failed' so the daemon's per-task status
-- poller (watchTaskCancellation) interrupts the running agent gracefully.
-- Returns the affected rows so the caller can broadcast task:cancelled and
-- reconcile per-agent status.
UPDATE agent_task_queue
SET status = 'cancelled', completed_at = now()
WHERE (runtime_id = ANY(@runtime_ids::uuid[]) OR agent_id = ANY(@agent_ids::uuid[]))
  AND status IN ('queued', 'dispatched', 'running')
RETURNING *;

-- name: DeleteAgentRuntime :exec
DELETE FROM agent_runtime WHERE id = $1;

-- name: CountActiveAgentsByRuntime :one
SELECT count(*) FROM agent WHERE runtime_id = $1 AND archived_at IS NULL;

-- name: DeleteArchivedAgentsByRuntime :exec
DELETE FROM agent WHERE runtime_id = $1 AND archived_at IS NOT NULL;

-- name: FindLegacyRuntimesByDaemonID :many
-- Looks up runtime rows keyed on a prior (hostname-derived) daemon_id. Used
-- at register-time to find rows owned by the same machine under its old
-- identity so agents/tasks can be re-pointed at the new UUID-keyed row.
--
-- Comparison is case-insensitive because os.Hostname() has been observed to
-- return different casings on the same machine (e.g. `Jiayuans-MacBook-Pro`
-- vs `jiayuans-macbook-pro`) across reboots/mDNS state changes. A case-
-- sensitive `=` would strand the old row; LOWER() on both sides handles drift
-- without forcing the daemon to enumerate cased permutations.
--
-- Returns many rather than one because case drift may have already minted
-- duplicate rows historically (e.g. `Foo.local` AND `foo.local` under the
-- same workspace+provider). A single-row lookup would consolidate only one
-- of them and leave the rest orphaned. Callers must merge every returned
-- row into the new UUID-keyed runtime.
SELECT * FROM agent_runtime
WHERE workspace_id = @workspace_id
  AND provider = @provider
  AND LOWER(daemon_id) = LOWER(@daemon_id);

-- name: ReassignAgentsToRuntime :execrows
-- Re-points every agent referencing old_runtime_id at new_runtime_id.
UPDATE agent
SET runtime_id = @new_runtime_id
WHERE runtime_id = @old_runtime_id;

-- name: ReassignTasksToRuntime :execrows
-- Re-points every queued/running/completed task referencing old_runtime_id.
-- Required before deleting the old runtime row because agent_task_queue has
-- an ON DELETE CASCADE FK that would otherwise drop historical tasks.
UPDATE agent_task_queue
SET runtime_id = @new_runtime_id
WHERE runtime_id = @old_runtime_id;

-- name: RecordRuntimeLegacyDaemonID :exec
-- Remembers the most recent hostname-derived daemon_id that was merged into
-- this row. Useful for debugging when tracing back why a given runtime row
-- subsumed an old one, and only overwrites NULL so the earliest merge is
-- preserved.
UPDATE agent_runtime
SET legacy_daemon_id = COALESCE(legacy_daemon_id, $2)
WHERE id = $1;

-- name: DeleteStaleOfflineRuntimes :many
-- Deletes runtimes that have been offline for longer than the TTL and have
-- no agents bound (active or archived). The FK constraint on agent.runtime_id
-- is ON DELETE RESTRICT, so we must exclude all agent references.
DELETE FROM agent_runtime
WHERE status = 'offline'
  AND last_seen_at < now() - make_interval(secs => @stale_seconds::double precision)
  AND id NOT IN (SELECT DISTINCT runtime_id FROM agent)
RETURNING id, workspace_id;