ALTER TABLE project_episodes ADD COLUMN redraw_script text;

INSERT INTO project_episodes (
    id, project_id, episode_no, name, cover_asset_id, source_video_asset_id,
    subtitle_asset_id, audio_source, source_language, status, analysis_message,
    redraw_script, created_at, updated_at
)
SELECT
    gen_random_uuid(), project.id, 1, '第1集', project.cover_asset_id,
    project.source_video_asset_id, project.subtitle_asset_id, project.audio_source,
    project.source_language, project.redraw_status, project.analysis_message,
    project.redraw_script, project.created_at, project.updated_at
FROM creative_projects project
WHERE project.project_type = 'video_redraw'
  AND project.deleted_at IS NULL
  AND NOT EXISTS (
      SELECT 1 FROM project_episodes episode
      WHERE episode.project_id = project.id AND episode.deleted_at IS NULL
  );

WITH first_episode AS (
    SELECT DISTINCT ON (episode.project_id) episode.id, episode.project_id
    FROM project_episodes episode
    JOIN creative_projects project ON project.id = episode.project_id
    WHERE project.project_type = 'video_redraw' AND episode.deleted_at IS NULL
    ORDER BY episode.project_id, episode.episode_no, episode.created_at
)
UPDATE project_episodes episode
SET cover_asset_id = COALESCE(episode.cover_asset_id, project.cover_asset_id),
    source_video_asset_id = COALESCE(episode.source_video_asset_id, project.source_video_asset_id),
    subtitle_asset_id = COALESCE(episode.subtitle_asset_id, project.subtitle_asset_id),
    audio_source = project.audio_source,
    source_language = COALESCE(episode.source_language, project.source_language),
    status = project.redraw_status,
    analysis_message = COALESCE(episode.analysis_message, project.analysis_message),
    redraw_script = COALESCE(episode.redraw_script, project.redraw_script)
FROM first_episode
JOIN creative_projects project ON project.id = first_episode.project_id
WHERE episode.id = first_episode.id;

WITH first_episode AS (
    SELECT DISTINCT ON (episode.project_id) episode.id, episode.project_id
    FROM project_episodes episode
    JOIN creative_projects project ON project.id = episode.project_id
    WHERE project.project_type = 'video_redraw' AND episode.deleted_at IS NULL
    ORDER BY episode.project_id, episode.episode_no, episode.created_at
)
UPDATE episode_storyboards storyboard
SET episode_id = first_episode.id, project_id = NULL
FROM first_episode
WHERE storyboard.project_id = first_episode.project_id;

WITH first_episode AS (
    SELECT DISTINCT ON (episode.project_id) episode.id, episode.project_id
    FROM project_episodes episode
    JOIN creative_projects project ON project.id = episode.project_id
    WHERE project.project_type = 'video_redraw' AND episode.deleted_at IS NULL
    ORDER BY episode.project_id, episode.episode_no, episode.created_at
)
UPDATE generation_tasks task
SET episode_id = first_episode.id
FROM first_episode
WHERE task.project_id = first_episode.project_id AND task.episode_id IS NULL;