--
-- VideoDetect Database Schema
-- Version: 1.0.0
-- Created: 2026-08-03
--

-- Create database (if not exists)
CREATE DATABASE IF NOT EXISTS videodetect
  CHARACTER SET utf8mb4
  COLLATE utf8mb4_unicode_ci;

USE videodetect;

-- -----------------------------------------------------
-- Table: videos
-- Stores metadata for each video file in the corpus
-- -----------------------------------------------------
CREATE TABLE IF NOT EXISTS videos (
    id BIGINT AUTO_INCREMENT PRIMARY KEY,
    file_path VARCHAR(2048) NOT NULL,
    file_size BIGINT NOT NULL COMMENT 'Size of the file in bytes',
    file_hash CHAR(64) COMMENT 'SHA-256 hash of file',
    resolution_w INT DEFAULT NULL,
    resolution_h INT DEFAULT NULL,
    codec VARCHAR(50) DEFAULT NULL,
    duration FLOAT DEFAULT NULL COMMENT 'Duration in seconds',
    last_scan_time DATETIME DEFAULT NULL,
    created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
    updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,

    UNIQUE KEY uk_path (file_path),
    INDEX idx_videos_last_scan (last_scan_time),
    INDEX idx_videos_file_path (file_path(255))
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;


CREATE TABLE IF NOT EXISTS tasks (
    id BIGINT AUTO_INCREMENT PRIMARY KEY,
    task_type VARCHAR(16) NOT NULL,
    video_id BIGINT NOT NULL,
    status ENUM('PENDING', 'IN_PROGRESS', 'COMPLETED', 'FAILED') NOT NULL DEFAULT 'PENDING',
    created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
    updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
    assign_key VARCHAR(64) DEFAULT NULL COMMENT 'Key to identify the worker assigned to this task',
    assigned_at DATETIME DEFAULT NULL COMMENT 'Timestamp when the task was assigned to a worker',
    results JSON DEFAULT NULL COMMENT 'Task-specific results or metadata',
    FOREIGN KEY (video_id) REFERENCES videos(id) ON DELETE CASCADE,
    INDEX idx_tasks_video (video_id),
    INDEX idx_tasks_status (status),
    INDEX idx_tasks_type_status (task_type, status),
    UNIQUE KEY uk_tasks_video_type (video_id, task_type)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;