db/heromodels/examples/legal_contract_example.rs

use heromodels::models::legal::{
    Contract, ContractRevision, ContractSigner, ContractStatus, SignerStatus,
};
// If BaseModelData's touch method or new method isn't directly part of the public API
// of heromodels crate root, we might need to import heromodels_core.
// For now, assuming `contract.base_data.touch()` would work if BaseModelData has a public `touch` method.
// Or, if `heromodels::models::BaseModelData` is the path.

// A helper for current timestamp (seconds since epoch)
fn current_timestamp_secs() -> u64 {
    std::time::SystemTime::now()
        .duration_since(std::time::UNIX_EPOCH)
        .unwrap_or_default()
        .as_secs()
}

fn main() {
    println!("Demonstrating Legal Contract Model Usage");

    // Create contract signers
    let signer1 = ContractSigner::new(
        "signer-uuid-alice-001".to_string(),
        "Alice Wonderland".to_string(),
        "alice@example.com".to_string(),
    )
    .status(SignerStatus::Pending)
    .comments("Awaiting Alice's review and signature.");

    let signer2 = ContractSigner::new(
        "signer-uuid-bob-002".to_string(),
        "Bob The Builder".to_string(),
        "bob@example.com".to_string(),
    )
    .status(SignerStatus::Signed)
    .signed_at(current_timestamp_secs() - 86400) // Signed yesterday
    .comments("Bob has signed the agreement.");

    // Create contract revisions
    let revision1 = ContractRevision::new(
        1,
        "Initial draft: This Service Agreement outlines the terms...".to_string(),
        current_timestamp_secs() - (86400 * 2), // 2 days ago
        "user-uuid-creator-charlie".to_string(),
    )
    .comments("Version 1.0 - Initial draft for review.");

    let revision2 = ContractRevision::new(
        2,
        "Updated draft: Added clause 5.b regarding data privacy...".to_string(),
        current_timestamp_secs() - 86400, // 1 day ago
        "user-uuid-editor-diana".to_string(),
    )
    .comments("Version 2.0 - Incorporated feedback from legal team.");

    // Create a new contract
    // base_id (u32 for BaseModelData) and contract_id (String for UUID)
    let mut contract = Contract::new(101, "contract-uuid-main-789".to_string())
        .title("Master Service Agreement (MSA) - Q3 2025")
        .description("Agreement for ongoing IT support services between TechSolutions Inc. and ClientCorp LLC.")
        .contract_type("MSA".to_string())
        .status(ContractStatus::PendingSignatures)
        .created_by("user-uuid-admin-eve".to_string())
        .terms_and_conditions("The full terms are detailed in the attached PDF, referenced as 'MSA_Q3_2025_Full.pdf'. This string can hold markdown or JSON summary.")
        .start_date(current_timestamp_secs() + (86400 * 7)) // Starts in 7 days
        .end_date(current_timestamp_secs() + (86400 * (365 + 7))) // Ends in 1 year + 7 days
        .renewal_period_days(30)
        .next_renewal_date(current_timestamp_secs() + (86400 * (365 + 7 - 30))) // Approx. 30 days before end_date
        .current_version(2)
        .add_signer(signer1.clone())
        .add_signer(signer2.clone())
        .add_revision(revision1.clone())
        .add_revision(revision2.clone());

    // The `#[model]` derive handles `created_at` and `updated_at` in `base_data`.
    // `base_data.touch()` might be called internally by setters or needs explicit call if fields are set directly.
    // For builder pattern, the final state of `base_data.updated_at` reflects the time of the last builder call if `touch()` is implicit.
    // If not, one might call `contract.base_data.touch()` after building.

    println!("\n--- Initial Contract Details ---");
    println!("{:#?}", contract);

    // Simulate a status change and signing
    contract.set_status(ContractStatus::Signed); // This should call base_data.touch()
    contract = contract.last_signed_date(current_timestamp_secs());
    // If set_status doesn't touch, and last_signed_date is not a builder method that touches:
    // contract.base_data.touch(); // Manually update timestamp if needed after direct field manipulation

    println!("\n--- Contract Details After Signing ---");
    println!("{:#?}", contract);

    println!("\n--- Accessing Specific Fields ---");
    println!("Contract Title: {}", contract.title);
    println!("Contract Status: {:?}", contract.status);
    println!("Contract ID (UUID): {}", contract.contract_id);
    println!("Base Model ID (u32): {}", contract.base_data.id); // From BaseModelData
    println!("Created At (timestamp): {}", contract.base_data.created_at); // From BaseModelData
    println!("Updated At (timestamp): {}", contract.base_data.modified_at); // From BaseModelData

    if let Some(first_signer_details) = contract.signers.first() {
        println!(
            "\nFirst Signer: {} ({})",
            first_signer_details.name, first_signer_details.email
        );
        println!("  Status: {:?}", first_signer_details.status);
        if let Some(signed_time) = first_signer_details.signed_at {
            println!("  Signed At: {}", signed_time);
        }
    }

    if let Some(latest_rev) = contract.revisions.iter().max_by_key(|r| r.version) {
        println!("\nLatest Revision (v{}):", latest_rev.version);
        println!("  Content Snippet: {:.60}...", latest_rev.content);
        println!("  Created By: {}", latest_rev.created_by);
        println!("  Revision Created At: {}", latest_rev.created_at);
    }

    println!("\nLegal Contract Model demonstration complete.");
}