CREATE TABLE IF NOT EXISTS users (
    id INT AUTO_INCREMENT PRIMARY KEY,
    portal_user_id INT NULL,
    email VARCHAR(255) NOT NULL UNIQUE,
    display_name VARCHAR(255) NULL,
    is_active TINYINT(1) NOT NULL DEFAULT 1,
    created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
    last_login_at DATETIME NULL
);

CREATE TABLE IF NOT EXISTS tenants (
    id INT AUTO_INCREMENT PRIMARY KEY,
    owner_user_id INT NOT NULL,
    slug VARCHAR(100) NOT NULL UNIQUE,
    storage_root VARCHAR(500) NOT NULL,
    service_status VARCHAR(50) NOT NULL DEFAULT 'active',
    retention_mode VARCHAR(50) NOT NULL DEFAULT 'standard',
    created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
    CONSTRAINT fk_tenants_owner FOREIGN KEY (owner_user_id) REFERENCES users(id)
);

CREATE TABLE IF NOT EXISTS devices (
    id INT AUTO_INCREMENT PRIMARY KEY,
    tenant_id INT NOT NULL,
    device_name VARCHAR(100) NOT NULL,
    device_type VARCHAR(50) NOT NULL,
    relative_path VARCHAR(255) NOT NULL,
    is_active TINYINT(1) NOT NULL DEFAULT 1,
    created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
    CONSTRAINT uq_devices_tenant_name UNIQUE (tenant_id, device_name),
    CONSTRAINT fk_devices_tenant FOREIGN KEY (tenant_id) REFERENCES tenants(id)
);

CREATE TABLE IF NOT EXISTS files (
    id BIGINT AUTO_INCREMENT PRIMARY KEY,
    tenant_id INT NOT NULL,
    device_id INT NOT NULL,
    parent_file_id BIGINT NULL,
    file_kind VARCHAR(20) NOT NULL,
    relative_path VARCHAR(1000) NOT NULL,
    directory_path VARCHAR(1000) NOT NULL,
    original_filename VARCHAR(255) NOT NULL,
    display_filename VARCHAR(255) NULL,
    basename VARCHAR(255) NOT NULL,
    extension VARCHAR(50) NOT NULL,
    mime_type VARCHAR(255) NULL,
    size_bytes BIGINT NOT NULL DEFAULT 0,
    sha256 CHAR(64) NULL,
    capture_date DATETIME NULL,
    uploaded_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
    is_immutable TINYINT(1) NOT NULL DEFAULT 1,
    is_deleted TINYINT(1) NOT NULL DEFAULT 0,
    deleted_at DATETIME NULL,
    CONSTRAINT fk_files_tenant FOREIGN KEY (tenant_id) REFERENCES tenants(id),
    CONSTRAINT fk_files_device FOREIGN KEY (device_id) REFERENCES devices(id),
    CONSTRAINT fk_files_parent FOREIGN KEY (parent_file_id) REFERENCES files(id)
);

CREATE TABLE IF NOT EXISTS jobs (
    id BIGINT AUTO_INCREMENT PRIMARY KEY,
    tenant_id INT NOT NULL,
    file_id BIGINT NOT NULL,
    job_type VARCHAR(100) NOT NULL,
    options_json LONGTEXT NULL,
    status VARCHAR(50) NOT NULL DEFAULT 'queued',
    created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
    started_at DATETIME NULL,
    completed_at DATETIME NULL,
    output_file_id BIGINT NULL,
    log_text LONGTEXT NULL,
    CONSTRAINT fk_jobs_tenant FOREIGN KEY (tenant_id) REFERENCES tenants(id),
    CONSTRAINT fk_jobs_file FOREIGN KEY (file_id) REFERENCES files(id)
);

CREATE TABLE IF NOT EXISTS audit_logs (
    id BIGINT AUTO_INCREMENT PRIMARY KEY,
    tenant_id INT NULL,
    user_id INT NULL,
    actor_type VARCHAR(20) NOT NULL,
    event_type VARCHAR(100) NOT NULL,
    file_id BIGINT NULL,
    job_id BIGINT NULL,
    ip_address VARCHAR(64) NULL,
    user_agent VARCHAR(500) NULL,
    event_detail LONGTEXT NULL,
    created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
    INDEX idx_audit_tenant_created (tenant_id, created_at),
    INDEX idx_audit_event_type (event_type)
);

CREATE TABLE IF NOT EXISTS admin_access_tokens (
    id BIGINT AUTO_INCREMENT PRIMARY KEY,
    tenant_id INT NOT NULL,
    issued_by_user_id INT NOT NULL,
    used_by_admin_id INT NULL,
    token_hash CHAR(64) NOT NULL,
    purpose VARCHAR(255) NOT NULL,
    status VARCHAR(50) NOT NULL DEFAULT 'issued',
    expires_at DATETIME NOT NULL,
    used_at DATETIME NULL,
    created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
    CONSTRAINT fk_admin_token_tenant FOREIGN KEY (tenant_id) REFERENCES tenants(id),
    CONSTRAINT fk_admin_token_owner FOREIGN KEY (issued_by_user_id) REFERENCES users(id)
);