CREATE TABLE hint_feed_settings (
    id TINYINT UNSIGNED NOT NULL,
    generation_interval_hours INT NOT NULL,
    holiday_countries_zh VARCHAR(255) CHARACTER SET ascii COLLATE ascii_bin NOT NULL,
    holiday_countries_en VARCHAR(255) CHARACTER SET ascii COLLATE ascii_bin NOT NULL,
    weather_cities_zh TEXT NOT NULL,
    weather_cities_en TEXT NOT NULL,
    google_trends_geos VARCHAR(255) CHARACTER SET ascii COLLATE ascii_bin NOT NULL,
    updated_at DATETIME(6) NOT NULL,
    PRIMARY KEY (id),
    CONSTRAINT chk_hint_feed_settings_singleton CHECK (id = 1),
    CONSTRAINT chk_hint_feed_generation_interval
        CHECK (generation_interval_hours BETWEEN 1 AND 168)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci;

INSERT INTO hint_feed_settings (
    id,
    generation_interval_hours,
    holiday_countries_zh,
    holiday_countries_en,
    weather_cities_zh,
    weather_cities_en,
    google_trends_geos,
    updated_at
) VALUES (
    1,
    12,
    'CN',
    'US,GB',
    '北京:39.90,116.40;上海:31.23,121.47;广州:23.13,113.26;深圳:22.54,114.06',
    'New York:40.71,-74.01;London:51.51,-0.13;Los Angeles:34.05,-118.24',
    'US,GB',
    UTC_TIMESTAMP(6)
);

CREATE TABLE hint_feed_generation_state (
    id TINYINT UNSIGNED NOT NULL,
    status VARCHAR(16) CHARACTER SET ascii COLLATE ascii_bin NOT NULL,
    last_started_at DATETIME(6) NULL,
    last_completed_at DATETIME(6) NULL,
    last_error_code VARCHAR(64) CHARACTER SET ascii COLLATE ascii_bin NULL,
    updated_at DATETIME(6) NOT NULL,
    PRIMARY KEY (id),
    CONSTRAINT chk_hint_feed_state_singleton CHECK (id = 1),
    CONSTRAINT chk_hint_feed_state_status
        CHECK (status IN ('IDLE', 'RUNNING', 'SUCCEEDED', 'FAILED'))
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci;

INSERT INTO hint_feed_generation_state (
    id,
    status,
    last_started_at,
    last_completed_at,
    last_error_code,
    updated_at
) VALUES (1, 'IDLE', NULL, NULL, NULL, UTC_TIMESTAMP(6));