use std::path::PathBuf;
use strum::IntoEnumIterator;
use utoipa::ToSchema;

use crate::compression_engine;
use crate::compression_engine::COMPRESSION_PROGRAMS;
use crate::compression_engine::CompressionType;
use crate::compression_engine::program::CompressionEngineProgram;
use crate::meta_plugin::MetaPluginType;
use crate::meta_plugin;

#[derive(serde::Serialize, serde::Deserialize, ToSchema)]
pub struct StatusInfo {
    pub paths: PathInfo,
    pub compression: Vec<CompressionInfo>,
    pub meta_plugins: std::collections::HashMap<String, MetaPluginInfo>,
    pub enabled_meta_plugins: Vec<String>,
}

#[derive(serde::Serialize, serde::Deserialize, ToSchema)]
pub struct PathInfo {
    pub data: String,
    pub database: String,
}

#[derive(serde::Serialize, serde::Deserialize, ToSchema)]
pub struct CompressionInfo {
    #[serde(rename = "type")]
    pub compression_type: String,
    pub found: bool,
    pub default: bool,
    pub binary: String,
    pub compress: String,
    pub decompress: String,
}

#[derive(serde::Serialize, serde::Deserialize, ToSchema, Clone)]
pub struct MetaPluginInfo {
    pub meta_name: String,
    pub outputs: std::collections::HashMap<String, serde_yaml::Value>,
    pub options: std::collections::HashMap<String, serde_yaml::Value>,
}

pub fn generate_status_info(
    data_path: PathBuf,
    db_path: PathBuf,
    enabled_meta_plugins: &Vec<MetaPluginType>,
    enabled_compression_type: Option<CompressionType>,
) -> StatusInfo {
    log::debug!("STATUS: Starting status info generation");
    let path_info = PathInfo {
        data: data_path.into_os_string().into_string().expect("Unable to convert data path to string"),
        database: db_path.into_os_string().into_string().expect("Unable to convert DB path to string"),
    };

    let default_type = compression_engine::default_compression_type();
    let mut compression_info = Vec::new();

    // Sort compression types by their string representation
    let mut sorted_compression_types: Vec<CompressionType> = CompressionType::iter().collect();
    sorted_compression_types.sort_by_key(|ct| ct.to_string());

    for compression_type in sorted_compression_types {
        let compression_program: CompressionEngineProgram =
            match &COMPRESSION_PROGRAMS[compression_type.clone()] {
                Some(compression_program) => compression_program.clone(),
                None => CompressionEngineProgram {
                    program: "".to_string(),
                    compress: Vec::new(),
                    decompress: Vec::new(),
                    supported: true,
                },
            };

        let _is_default = compression_type == default_type;
        let is_enabled = enabled_compression_type.as_ref().map_or(false, |ct| *ct == compression_type);
        let binary = if compression_program.program.is_empty() {
            "<INTERNAL>".to_string()
        } else {
            compression_program.program
        };

        compression_info.push(CompressionInfo {
            compression_type: compression_type.to_string(),
            found: compression_program.supported,
            default: is_enabled,  // Changed from is_default to is_enabled
            binary,
            compress: compression_program.compress.join(" "),
            decompress: compression_program.decompress.join(" "),
        });
    }

    let mut meta_plugins_map = std::collections::HashMap::new();
    let mut enabled_meta_plugins_vec = Vec::new();

    // Sort meta plugin types by their string representation to avoid creating plugins just for sorting
    let mut sorted_meta_plugins: Vec<MetaPluginType> = MetaPluginType::iter().collect();
    sorted_meta_plugins.sort_by_key(|meta_plugin_type| meta_plugin_type.to_string());

    for meta_plugin_type in sorted_meta_plugins {
        log::debug!("STATUS: Processing meta plugin type: {:?}", meta_plugin_type);
        log::debug!("STATUS: About to call get_meta_plugin");
        let meta_plugin = meta_plugin::get_meta_plugin(meta_plugin_type.clone(), None, None);
        log::debug!("STATUS: Created meta plugin instance");
        
        // Get meta name first to avoid borrowing issues
        log::debug!("STATUS: Getting meta name...");
        let meta_name = meta_plugin.meta_type().to_string();
        log::debug!("STATUS: Got meta name: {}", meta_name);
        
        // Check if this plugin is enabled
        let is_enabled = enabled_meta_plugins.contains(&meta_plugin_type);
        if is_enabled {
            enabled_meta_plugins_vec.push(meta_name.clone());
        }
        
        // Create a display of outputs for status - use configured outputs if available, otherwise defaults
        let outputs_display = if meta_plugin.outputs().is_empty() {
            // No configured outputs, use defaults
            let mut default_outputs = std::collections::HashMap::new();
            for output_name in meta_plugin.default_outputs() {
                default_outputs.insert(output_name.clone(), serde_yaml::Value::String(output_name));
            }
            default_outputs
        } else {
            // Use configured outputs
            meta_plugin.outputs().clone()
        };
        
        // Get options
        let options = meta_plugin.options().clone();
        
        meta_plugins_map.insert(meta_name.clone(), MetaPluginInfo {
            meta_name,
            outputs: outputs_display,
            options,
        });
    }

    StatusInfo {
        paths: path_info,
        compression: compression_info,
        meta_plugins: meta_plugins_map,
        enabled_meta_plugins: enabled_meta_plugins_vec,
    }
}