-- video_caption_task 字幕叠加任务表
-- 使用 HyperFrames (HTML+CSS+Chrome Headless) 渲染带字幕的营销视频
CREATE TABLE IF NOT EXISTS video_caption_task (
    id              BIGSERIAL PRIMARY KEY,
    tenant_id       INT8 NOT NULL DEFAULT 0,
    task_id         VARCHAR(64) NOT NULL UNIQUE,       -- 任务唯一标识,前缀 cap_
    video_urls      TEXT NOT NULL,                      -- 视频URL列表,JSON数组
    audio_url       VARCHAR(1024) DEFAULT '',            -- 背景音乐URL(可选)
    elements        TEXT NOT NULL,                       -- 字幕元素列表,JSON数组
    width           INT NOT NULL DEFAULT 1080,           -- 视频宽度
    height          INT NOT NULL DEFAULT 1920,           -- 视频高度
    status          VARCHAR(20) NOT NULL DEFAULT 'pending', -- pending/running/success/failed
    file_url        VARCHAR(1024) DEFAULT '',            -- 输出文件URL
    file_size       INT8 DEFAULT 0,                       -- 输出文件大小(字节)
    file_name       VARCHAR(255) DEFAULT '',              -- 输出文件名
    duration_str    VARCHAR(20) DEFAULT '',               -- 视频时长
    error_message   TEXT,                                 -- 错误信息
    callback_url    VARCHAR(1024) DEFAULT '',             -- 回调地址
    created_at      TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
    updated_at      TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
    deleted_at      TIMESTAMP WITH TIME ZONE DEFAULT NULL
);

COMMENT ON TABLE video_caption_task IS '字幕叠加任务';
COMMENT ON COLUMN video_caption_task.task_id IS '任务唯一标识';
COMMENT ON COLUMN video_caption_task.video_urls IS '背景视频URL列表';
COMMENT ON COLUMN video_caption_task.audio_url IS '背景音乐URL';
COMMENT ON COLUMN video_caption_task.elements IS '字幕/图片元素列表JSON';
COMMENT ON COLUMN video_caption_task.status IS '任务状态:pending/running/success/failed';
COMMENT ON COLUMN video_caption_task.file_url IS '输出文件URL';
COMMENT ON COLUMN video_caption_task.file_size IS '输出文件大小';
COMMENT ON COLUMN video_caption_task.file_name IS '输出文件名';
COMMENT ON COLUMN video_caption_task.duration_str IS '视频时长';
COMMENT ON COLUMN video_caption_task.error_message IS '错误信息';
COMMENT ON COLUMN video_caption_task.callback_url IS '任务完成后回调地址';

CREATE INDEX idx_caption_task_id ON video_caption_task(task_id);
CREATE INDEX idx_caption_status ON video_caption_task(status);