-- name: MarkVideoCompleted :one
INSERT INTO user_sub_course_video_progress (
    user_id,
    sub_course_id,
    video_id,
    completed_at,
    updated_at
)
SELECT
    @user_id::BIGINT,
    v.sub_course_id,
    v.id,
    CURRENT_TIMESTAMP,
    CURRENT_TIMESTAMP
FROM sub_course_videos v
WHERE v.id = @video_id::BIGINT
  AND v.status = 'PUBLISHED'
ON CONFLICT (user_id, video_id)
DO UPDATE SET
    completed_at = CURRENT_TIMESTAMP,
    updated_at = CURRENT_TIMESTAMP
RETURNING *;

-- name: GetFirstIncompletePreviousVideo :one
SELECT
    v.id,
    v.title,
    v.display_order
FROM sub_course_videos target
JOIN sub_course_videos v
    ON v.sub_course_id = target.sub_course_id
   AND v.status = 'PUBLISHED'
   AND (
        v.display_order < target.display_order OR
        (v.display_order = target.display_order AND v.id < target.id)
   )
LEFT JOIN user_sub_course_video_progress p
    ON p.video_id = v.id
   AND p.user_id = @user_id::BIGINT
   AND p.completed_at IS NOT NULL
WHERE target.id = @video_id::BIGINT
  AND p.video_id IS NULL
ORDER BY v.display_order ASC, v.id ASC
LIMIT 1;