ALTER TABLE match_events
    MODIFY event_type ENUM('serve','point','error','ace','block','attack','rotation','substitution','timeout','libero','yellow_card','red_card','mvp','audit','signature') NOT NULL;

SET @column_exists := (
    SELECT COUNT(*)
    FROM information_schema.COLUMNS
    WHERE TABLE_SCHEMA = DATABASE()
      AND TABLE_NAME = 'rotations'
      AND COLUMN_NAME = 'is_libero'
);
SET @ddl := IF(
    @column_exists = 0,
    'ALTER TABLE rotations ADD COLUMN is_libero BOOLEAN NOT NULL DEFAULT FALSE',
    'SELECT "rotations.is_libero already exists"'
);
PREPARE stmt FROM @ddl;
EXECUTE stmt;
DEALLOCATE PREPARE stmt;

CREATE TABLE IF NOT EXISTS match_liberos (
    id BIGINT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
    match_id BIGINT UNSIGNED NOT NULL,
    team_id BIGINT UNSIGNED NOT NULL,
    player_id BIGINT UNSIGNED NOT NULL,
    set_number TINYINT UNSIGNED NOT NULL,
    is_starting BOOLEAN NOT NULL DEFAULT FALSE,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    CONSTRAINT fk_liberos_match FOREIGN KEY (match_id) REFERENCES matches(id) ON DELETE CASCADE,
    CONSTRAINT fk_liberos_team FOREIGN KEY (team_id) REFERENCES teams(id) ON DELETE CASCADE,
    CONSTRAINT fk_liberos_player FOREIGN KEY (player_id) REFERENCES players(id) ON DELETE CASCADE,
    UNIQUE KEY uq_match_team_set_libero (match_id, team_id, set_number, player_id)
) ENGINE=InnoDB;

CREATE TABLE IF NOT EXISTS substitutions (
    id BIGINT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
    match_id BIGINT UNSIGNED NOT NULL,
    team_id BIGINT UNSIGNED NOT NULL,
    set_number TINYINT UNSIGNED NOT NULL,
    player_out_id BIGINT UNSIGNED NOT NULL,
    player_in_id BIGINT UNSIGNED NOT NULL,
    reason VARCHAR(120),
    created_by BIGINT UNSIGNED,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    CONSTRAINT fk_substitutions_match FOREIGN KEY (match_id) REFERENCES matches(id) ON DELETE CASCADE,
    CONSTRAINT fk_substitutions_team FOREIGN KEY (team_id) REFERENCES teams(id) ON DELETE CASCADE,
    CONSTRAINT fk_substitutions_out FOREIGN KEY (player_out_id) REFERENCES players(id),
    CONSTRAINT fk_substitutions_in FOREIGN KEY (player_in_id) REFERENCES players(id),
    CONSTRAINT fk_substitutions_user FOREIGN KEY (created_by) REFERENCES users(id) ON DELETE SET NULL,
    INDEX idx_substitutions_match_set (match_id, set_number, team_id)
) ENGINE=InnoDB;

CREATE TABLE IF NOT EXISTS timeouts (
    id BIGINT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
    match_id BIGINT UNSIGNED NOT NULL,
    team_id BIGINT UNSIGNED NOT NULL,
    set_number TINYINT UNSIGNED NOT NULL,
    points_home TINYINT UNSIGNED NOT NULL DEFAULT 0,
    points_away TINYINT UNSIGNED NOT NULL DEFAULT 0,
    requested_by VARCHAR(120),
    created_by BIGINT UNSIGNED,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    CONSTRAINT fk_timeouts_match FOREIGN KEY (match_id) REFERENCES matches(id) ON DELETE CASCADE,
    CONSTRAINT fk_timeouts_team FOREIGN KEY (team_id) REFERENCES teams(id) ON DELETE CASCADE,
    CONSTRAINT fk_timeouts_user FOREIGN KEY (created_by) REFERENCES users(id) ON DELETE SET NULL,
    INDEX idx_timeouts_match_set (match_id, set_number, team_id)
) ENGINE=InnoDB;

CREATE TABLE IF NOT EXISTS rally_history (
    id BIGINT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
    match_id BIGINT UNSIGNED NOT NULL,
    set_number TINYINT UNSIGNED NOT NULL,
    rally_number INT UNSIGNED NOT NULL,
    serving_team_id BIGINT UNSIGNED,
    winning_team_id BIGINT UNSIGNED,
    result_type ENUM('point','error','ace','block','attack') NOT NULL DEFAULT 'point',
    points_home TINYINT UNSIGNED NOT NULL DEFAULT 0,
    points_away TINYINT UNSIGNED NOT NULL DEFAULT 0,
    notes VARCHAR(255),
    created_by BIGINT UNSIGNED,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    CONSTRAINT fk_rally_match FOREIGN KEY (match_id) REFERENCES matches(id) ON DELETE CASCADE,
    CONSTRAINT fk_rally_serving_team FOREIGN KEY (serving_team_id) REFERENCES teams(id) ON DELETE SET NULL,
    CONSTRAINT fk_rally_winning_team FOREIGN KEY (winning_team_id) REFERENCES teams(id) ON DELETE SET NULL,
    CONSTRAINT fk_rally_user FOREIGN KEY (created_by) REFERENCES users(id) ON DELETE SET NULL,
    UNIQUE KEY uq_rally_number (match_id, set_number, rally_number)
) ENGINE=InnoDB;

CREATE TABLE IF NOT EXISTS referee_audit_logs (
    id BIGINT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
    match_id BIGINT UNSIGNED NOT NULL,
    user_id BIGINT UNSIGNED,
    action VARCHAR(80) NOT NULL,
    payload JSON,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    CONSTRAINT fk_audit_match FOREIGN KEY (match_id) REFERENCES matches(id) ON DELETE CASCADE,
    CONSTRAINT fk_audit_user FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE SET NULL,
    INDEX idx_audit_match_created (match_id, created_at)
) ENGINE=InnoDB;

CREATE TABLE IF NOT EXISTS referee_signatures (
    id BIGINT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
    match_id BIGINT UNSIGNED NOT NULL,
    referee_id BIGINT UNSIGNED,
    signer_name VARCHAR(140) NOT NULL,
    role VARCHAR(80) NOT NULL DEFAULT 'principal',
    signature_hash CHAR(64) NOT NULL,
    signed_payload JSON,
    signed_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    CONSTRAINT fk_signatures_match FOREIGN KEY (match_id) REFERENCES matches(id) ON DELETE CASCADE,
    CONSTRAINT fk_signatures_referee FOREIGN KEY (referee_id) REFERENCES referees(id) ON DELETE SET NULL,
    UNIQUE KEY uq_signature_match_role (match_id, role)
) ENGINE=InnoDB;