//! RON content validator CLI (#611).
//!
//! Deserializes a RON file into the actual Rust structs and prints errors.
//! This is the copy team's lint tool — run it to check RON files without
//! needing to compile the full server.
//!
//! # Usage
//!
//! ```sh
//! # Via wrapper script (recommended):
//! tooling/validate-ron server/content/global/zone-identity-spec.example.ron zone
//! tooling/validate-ron server/content/global/culture-van-maanens-star.example.ron culture
//!
//! # Direct:
//! cargo run --bin validate_ron -- <file.ron> <zone|culture>
//! ```

use std::process;

use clap::Parser;

use settled_reach_server::npc::blueprint::{CultureProfile, ZoneSpec, ZoneTypeTemplate};

#[derive(Parser)]
#[command(
    name = "validate_ron",
    about = "Validate RON content files against Rust struct schemas"
)]
struct Args {
    /// Path to the RON file to validate.
    file: String,
    /// Schema type: "zone" (ZoneSpec), "zone_type" (ZoneTypeTemplate), or "culture" (CultureProfile).
    schema: String,
}

fn main() {
    let args = Args::parse();

    let content = match std::fs::read_to_string(&args.file) {
        Ok(c) => c,
        Err(e) => {
            eprintln!("Error reading {}: {}", args.file, e);
            process::exit(1);
        }
    };

    match args.schema.as_str() {
        "zone" => match ron::from_str::<ZoneSpec>(&content) {
            Ok(spec) => {
                println!("Valid ZoneSpec: {} ({})", spec.label, spec.zone_type);
                println!(
                    "  {} roles, {} social sites",
                    spec.roles.len(),
                    spec.social_sites.len()
                );
                let mut warnings = 0;
                if spec.roles.is_empty() {
                    eprintln!("  WARNING: no roles defined — generator will reject this");
                    warnings += 1;
                }
                if spec.population_density < 1 {
                    eprintln!("  WARNING: population_density is 0 — generator requires >= 1");
                    warnings += 1;
                }
                for site in &spec.social_sites {
                    if site.min_npcs > site.max_npcs {
                        eprintln!(
                            "  WARNING: social site '{}' has min_npcs ({}) > max_npcs ({})",
                            site.site_type, site.min_npcs, site.max_npcs
                        );
                        warnings += 1;
                    }
                }
                if warnings > 0 {
                    process::exit(1);
                }
            }
            Err(e) => {
                eprintln!("Invalid ZoneSpec in {}:", args.file);
                eprintln!("  {}", e);
                process::exit(1);
            }
        },
        "culture" => match ron::from_str::<CultureProfile>(&content) {
            Ok(profile) => {
                println!("Valid CultureProfile: {} ({})", profile.name, profile.id);
                println!(
                    "  {} given names, {} family names",
                    profile.naming.given_names.len(),
                    profile.naming.family_names.len()
                );
                println!(
                    "  {} filler words, {} favored traits",
                    profile.speech.filler_words.len(),
                    profile.values.favored_traits.len()
                );
                let mut warnings = 0;
                if profile.naming.given_names.is_empty() {
                    eprintln!("  WARNING: no given_names — generator will reject this");
                    warnings += 1;
                }
                if warnings > 0 {
                    process::exit(1);
                }
            }
            Err(e) => {
                eprintln!("Invalid CultureProfile in {}:", args.file);
                eprintln!("  {}", e);
                process::exit(1);
            }
        },
        "zone_type" => match ron::from_str::<ZoneTypeTemplate>(&content) {
            Ok(template) => {
                println!(
                    "Valid ZoneTypeTemplate: {} ({})",
                    template.label, template.id
                );
                println!(
                    "  {} roles, {} social site types",
                    template.roles.len(),
                    template.social_site_types.len()
                );
                let mut warnings = 0;
                if template.roles.is_empty() {
                    eprintln!("  WARNING: no roles defined — generator will reject this");
                    warnings += 1;
                }
                let role_ids: Vec<&str> = template.roles.iter().map(|r| r.id.as_str()).collect();
                for role in &template.roles {
                    if role.behavior_primitives.is_empty() {
                        eprintln!("  WARNING: role '{}' has no behavior_primitives", role.id);
                        warnings += 1;
                    }
                }
                for site in &template.social_site_types {
                    for eligible in &site.eligible_roles {
                        if !role_ids.contains(&eligible.as_str()) {
                            eprintln!(
                                "  WARNING: social site '{}' references eligible_role '{}' which is not a defined role",
                                site.site_type, eligible
                            );
                            warnings += 1;
                        }
                    }
                }
                if warnings > 0 {
                    process::exit(1);
                }
            }
            Err(e) => {
                eprintln!("Invalid ZoneTypeTemplate in {}:", args.file);
                eprintln!("  {}", e);
                process::exit(1);
            }
        },
        other => {
            eprintln!(
                "Unknown schema type: '{}'. Use 'zone', 'zone_type', or 'culture'.",
                other
            );
            process::exit(1);
        }
    }
}