-- Entity read + mutation queries (API paths). Aliased `e` throughout to
-- avoid ambiguity with joined tables.

-- name: GetEntityByID :one
SELECT e.* FROM entities e WHERE e.id = $1;

-- name: GetEntityBySlug :one
SELECT e.* FROM entities e WHERE e.slug = $1;

-- name: ListEntities :many
WITH RECURSIVE tt AS (
    SELECT name FROM entity_types WHERE sqlc.narg('type')::text IS NULL OR name = sqlc.narg('type')
    UNION
    SELECT et.name FROM entity_types et JOIN tt ON et.parent_type = tt.name
    WHERE sqlc.narg('type')::text IS NOT NULL
)
SELECT e.* FROM entities e
JOIN entity_types et ON et.name = e.type
WHERE e.type IN (SELECT name FROM tt)
  AND (sqlc.narg('state')::text IS NULL OR e.state = sqlc.narg('state'))
  AND (sqlc.narg('domain')::text IS NULL OR et.domain = sqlc.narg('domain'))
  AND (sqlc.narg('layer')::text IS NULL OR et.layer = sqlc.narg('layer'))
  AND (sqlc.narg('q')::text IS NULL
       OR e.slug ILIKE '%'||sqlc.narg('q')||'%'
       OR e.name ILIKE '%'||sqlc.narg('q')||'%')
  AND (sqlc.narg('cursor')::text IS NULL OR e.slug > sqlc.narg('cursor'))
ORDER BY e.slug
LIMIT sqlc.arg('lim');

-- name: InsertEntity :one
INSERT INTO entities (id, slug, type, name, state, attributes)
VALUES ($1, $2, $3, $4, $5, $6)
RETURNING *;

-- name: UpdateEntity :one
UPDATE entities SET
    name = COALESCE(sqlc.narg('name'), name),
    state = COALESCE(sqlc.narg('state'), state),
    attributes = COALESCE(sqlc.narg('attributes'), attributes),
    maintenance_until = CASE WHEN sqlc.arg('set_maintenance')::bool
                             THEN sqlc.narg('maintenance_until') ELSE maintenance_until END,
    version = version + 1,
    updated_at = now()
WHERE id = sqlc.arg('id') AND version = sqlc.arg('version')
RETURNING *;

-- name: MergeEntityAttributes :execrows
-- Shallow-merge a JSON patch into an entity's attributes (the
-- update_entity_attributes MCP/HTTP surface). Replaces the raw
-- `attributes = attributes || $2::jsonb` used in entity_tools.go.
UPDATE entities SET
    attributes = attributes || sqlc.arg('patch')::jsonb,
    updated_at = now()
WHERE slug = sqlc.arg('slug');

-- name: SetEntityState :execrows
-- Set an entity's lifecycle state by id (the set_entity_state surface, run
-- after db.ValidateTransition). Replaces the raw
-- `UPDATE entities SET state = $2 ... WHERE id = $1`.
UPDATE entities SET
    state = sqlc.arg('state'),
    updated_at = now()
WHERE id = sqlc.arg('id');

-- blast_radius(): the recursive-CTE traversal function's TABLE return type
-- is opaque to sqlc's analyzer — that one query stays hand-written pgx in
-- internal/httpapi (see entities.go GetBlastRadius).
--
-- Deliberate raw-SQL exceptions (plan E2): the httpapi entity *read* handlers
-- (ListEntities/GetEntity/GetGraph/queryEntities) project a fixed
-- `entityCols` column set (entities.* + a LEFT JOIN to entity_status for
-- health/last_check_at) and scan it positionally into the oapi-generated
-- gen.Entity shape. sqlc generates its own row struct per query and cannot
-- emit gen.Entity, so migrating those reads would add a per-call field-by-
-- field mapping with no compile-time gain and real column-order risk. They
-- stay hand-written pgx, like blast_radius and the seed/export bulk paths
-- noted in sqlc.yaml. The mutation/relationship surface (MergeEntityAttributes,
-- SetEntityState, InsertRelationshipIfAbsent, EndCurrentRelationship) IS
-- migrated and is what the entity CRUD tools now call.
