//! Parse Cursebreaker Resource Prefabs
//!
//! This example demonstrates:
//! 1. Parsing Cursebreaker prefab files directly
//! 2. Finding Interactable_Resource components in prefabs
//! 3. Extracting typeId and maxHealth data
//! 4. Writing resource data to an output file
//!
//! Note: The 10_3.unity scene uses prefab instances, and the current parser
//! doesn't yet support resolving components from nested prefabs. This example
//! parses the prefab files directly instead.

use unity_parser::{GuidResolver, UnityComponent, UnityFile};
use std::fs::File;
use std::io::Write;
use std::path::Path;
use walkdir::WalkDir;

/// Interactable_Resource component from Cursebreaker
///
/// C# definition from Interactable_Resource.cs:
/// ```csharp
/// public class Interactable_Resource : Interactable
/// {
///     public int health;
///     public int maxHealth;
///     public int typeId;
///     // ... other fields
/// }
/// ```
#[derive(Debug, Clone, UnityComponent)]
#[unity_class("Interactable_Resource")]
pub struct InteractableResource {
    #[unity_field("maxHealth")]
    pub max_health: i64,

    #[unity_field("typeId")]
    pub type_id: i64,
}

fn main() -> Result<(), Box<dyn std::error::Error>> {
    println!("🎮 Cursebreaker - Resource Prefab Parser");
    println!("{}", "=".repeat(70));
    println!();

    // Build GUID resolver for the project
    let project_path = Path::new("/home/connor/repos/CBAssets");
    println!("📦 Building GUID resolver for project: {}", project_path.display());

    let resolver = match GuidResolver::from_project(project_path) {
        Ok(r) => {
            println!("   ✅ GUID resolver built successfully ({} mappings)", r.len());

            // Debug: Check if we have Interactable_Resource
            if let Some(class) = r.resolve_class_name("d39ddbf1c2c3d1a4baa070e5e76548bd") {
                println!("   ✅ Found Interactable_Resource in resolver: {}", class);
            } else {
                println!("   ⚠️  Interactable_Resource NOT found in resolver");
                // Try to find what we did find related to "Interactable"
                println!("   Searching for similar class names...");
            }

            Some(r)
        }
        Err(e) => {
            eprintln!("   ❌ Failed to build GUID resolver: {}", e);
            None
        }
    };
    println!();

    let harvestables_dir = Path::new("/home/connor/repos/CBAssets/_GameAssets/Prefabs/Harvestables");

    if !harvestables_dir.exists() {
        eprintln!("❌ Error: Harvestables directory not found at {}", harvestables_dir.display());
        return Err("Harvestables directory not found".into());
    }

    println!("📁 Scanning for harvestable prefabs in:");
    println!("   {}", harvestables_dir.display());
    println!();

    // Find all prefab files
    let mut prefab_files = Vec::new();
    for entry in WalkDir::new(harvestables_dir)
        .follow_links(false)
        .into_iter()
        .filter_map(|e| e.ok())
    {
        let path = entry.path();
        if path.extension().and_then(|s| s.to_str()) == Some("prefab") {
            prefab_files.push(path.to_path_buf());
        }
    }

    println!("📄 Found {} prefab file(s)", prefab_files.len());
    println!();

    let mut all_resources = Vec::new();

    // Parse each prefab using the GUID resolver we built
    for prefab_path in &prefab_files {
        println!("🔍 Parsing: {}", prefab_path.file_name().unwrap().to_string_lossy());

        // For prefabs, we need to manually parse and check documents
        // since prefabs don't have an ECS world like scenes do
        match UnityFile::from_path(prefab_path) {
            Ok(UnityFile::Prefab(prefab)) => {
                // Search through YAML documents for Interactable_Resource components
                let mut found_in_prefab = false;

                for doc in &prefab.documents {
                    // Check if this document is a MonoBehaviour
                    if doc.class_name == "MonoBehaviour" {
                        // Try to extract the m_Script GUID
                        if let Some(m_script) = doc.yaml.get("m_Script").and_then(|v| v.as_mapping()) {
                            if let Some(guid_val) = m_script.get("guid").and_then(|v| v.as_str()) {
                                // Resolve GUID to class name
                                if let Some(ref res) = resolver {
                                    if let Some(class_name) = res.resolve_class_name(guid_val) {
                                        // Debug: print what we found
                                        if prefab_path.file_name().unwrap().to_string_lossy().contains("Copper Ore") {
                                            eprintln!("DEBUG: Found class '{}' in Copper Ore prefab", class_name);
                                        }

                                        if class_name == "Interactable_Resource" {
                                            // Extract fields
                                            let type_id = doc.yaml.get("typeId")
                                                .and_then(|v| v.as_i64())
                                                .unwrap_or(0);
                                            let max_health = doc.yaml.get("maxHealth")
                                                .and_then(|v| v.as_i64())
                                                .unwrap_or(0);

                                            let prefab_name = prefab_path
                                                .file_stem()
                                                .and_then(|s| s.to_str())
                                                .unwrap_or("unknown");

                                            all_resources.push((
                                                prefab_name.to_string(),
                                                type_id,
                                                max_health,
                                            ));

                                            found_in_prefab = true;
                                        }
                                    } else if prefab_path.file_name().unwrap().to_string_lossy().contains("Copper Ore") {
                                        eprintln!("DEBUG: Could not resolve GUID '{}' in Copper Ore prefab", guid_val);
                                    }
                                }
                            }
                        }
                    }
                }

                if found_in_prefab {
                    println!("   ✅ Found Interactable_Resource");
                } else {
                    println!("   ⊘ No Interactable_Resource found");
                }
            }
            Ok(_) => {
                println!("   ⊘ Not a prefab file");
            }
            Err(e) => {
                println!("   ❌ Parse error: {}", e);
            }
        }
    }

    println!();
    println!("{}", "=".repeat(70));
    println!("📊 Summary: Found {} resource(s)", all_resources.len());
    println!("{}", "=".repeat(70));
    println!();

    if !all_resources.is_empty() {
        // Display resources
        for (name, type_id, max_health) in &all_resources {
            println!("  📦 Prefab: \"{}\"", name);
            println!("     • typeId: {}", type_id);
            println!("     • maxHealth: {}", max_health);
            println!();
        }

        // Write to output file
        let output_path = "resource_prefabs_output.txt";
        let mut output_file = File::create(output_path)?;

        writeln!(output_file, "Cursebreaker Resource Prefabs")?;
        writeln!(output_file, "{}", "=".repeat(70))?;
        writeln!(output_file)?;
        writeln!(output_file, "Total resources found: {}", all_resources.len())?;
        writeln!(output_file)?;
        writeln!(output_file, "{}", "-".repeat(70))?;
        writeln!(output_file)?;

        for (name, type_id, max_health) in &all_resources {
            writeln!(output_file, "Prefab: {}", name)?;
            writeln!(output_file, "  TypeID: {}", type_id)?;
            writeln!(output_file, "  MaxHealth: {}", max_health)?;
            writeln!(output_file)?;
        }

        writeln!(output_file, "{}", "=".repeat(70))?;
        writeln!(output_file, "End of resource data")?;

        println!("📝 Resource data written to: {}", output_path);
    }

    println!();
    println!("{}", "=".repeat(70));
    println!("✅ Parsing complete!");
    println!("{}", "=".repeat(70));

    Ok(())
}