cc-switch/src-tauri/src/opencode_config.rs

use crate::config::write_json_file;
use crate::error::AppError;
use crate::provider::OpenCodeProviderConfig;
use crate::settings::get_opencode_override_dir;
use indexmap::IndexMap;
use serde_json::{json, Map, Value};
use std::path::PathBuf;

pub fn get_opencode_dir() -> PathBuf {
    if let Some(override_dir) = get_opencode_override_dir() {
        return override_dir;
    }

    dirs::home_dir()
        .map(|h| h.join(".config").join("opencode"))
        .unwrap_or_else(|| PathBuf::from(".config").join("opencode"))
}

pub fn get_opencode_config_path() -> PathBuf {
    get_opencode_dir().join("opencode.json")
}

#[allow(dead_code)]
pub fn get_opencode_env_path() -> PathBuf {
    get_opencode_dir().join(".env")
}

pub fn read_opencode_config() -> Result<Value, AppError> {
    let path = get_opencode_config_path();

    if !path.exists() {
        return Ok(json!({
            "$schema": "https://opencode.ai/config.json"
        }));
    }

    let content = std::fs::read_to_string(&path).map_err(|e| AppError::io(&path, e))?;
    serde_json::from_str(&content).map_err(|e| AppError::json(&path, e))
}

pub fn write_opencode_config(config: &Value) -> Result<(), AppError> {
    let path = get_opencode_config_path();
    write_json_file(&path, config)?;

    log::debug!("OpenCode config written to {path:?}");
    Ok(())
}

pub fn get_providers() -> Result<Map<String, Value>, AppError> {
    let config = read_opencode_config()?;
    Ok(config
        .get("provider")
        .and_then(|v| v.as_object())
        .cloned()
        .unwrap_or_default())
}

pub fn set_provider(id: &str, config: Value) -> Result<(), AppError> {
    let mut full_config = read_opencode_config()?;

    if full_config.get("provider").is_none() {
        full_config["provider"] = json!({});
    }

    if let Some(providers) = full_config
        .get_mut("provider")
        .and_then(|v| v.as_object_mut())
    {
        providers.insert(id.to_string(), config);
    }

    write_opencode_config(&full_config)
}

pub fn remove_provider(id: &str) -> Result<(), AppError> {
    let mut config = read_opencode_config()?;

    if let Some(providers) = config.get_mut("provider").and_then(|v| v.as_object_mut()) {
        providers.remove(id);
    }

    write_opencode_config(&config)
}

pub fn get_typed_providers() -> Result<IndexMap<String, OpenCodeProviderConfig>, AppError> {
    let providers = get_providers()?;
    let mut result = IndexMap::new();

    for (id, value) in providers {
        match serde_json::from_value::<OpenCodeProviderConfig>(value.clone()) {
            Ok(config) => {
                result.insert(id, config);
            }
            Err(e) => {
                log::warn!("Failed to parse provider '{id}': {e}");
            }
        }
    }

    Ok(result)
}

pub fn set_typed_provider(id: &str, config: &OpenCodeProviderConfig) -> Result<(), AppError> {
    let value = serde_json::to_value(config).map_err(|e| AppError::JsonSerialize { source: e })?;
    set_provider(id, value)
}

pub fn get_mcp_servers() -> Result<Map<String, Value>, AppError> {
    let config = read_opencode_config()?;
    Ok(config
        .get("mcp")
        .and_then(|v| v.as_object())
        .cloned()
        .unwrap_or_default())
}

pub fn set_mcp_server(id: &str, config: Value) -> Result<(), AppError> {
    let mut full_config = read_opencode_config()?;

    if full_config.get("mcp").is_none() {
        full_config["mcp"] = json!({});
    }

    if let Some(mcp) = full_config.get_mut("mcp").and_then(|v| v.as_object_mut()) {
        mcp.insert(id.to_string(), config);
    }

    write_opencode_config(&full_config)
}

pub fn remove_mcp_server(id: &str) -> Result<(), AppError> {
    let mut config = read_opencode_config()?;

    if let Some(mcp) = config.get_mut("mcp").and_then(|v| v.as_object_mut()) {
        mcp.remove(id);
    }

    write_opencode_config(&config)
}

pub fn add_plugin(plugin_name: &str) -> Result<(), AppError> {
    let mut config = read_opencode_config()?;

    let plugins = config.get_mut("plugin").and_then(|v| v.as_array_mut());

    match plugins {
        Some(arr) => {
            // Mutual exclusion: standard OMO and OMO Slim cannot coexist as plugins
            if plugin_name.starts_with("oh-my-opencode")
                && !plugin_name.starts_with("oh-my-opencode-slim")
            {
                // Adding standard OMO -> remove all Slim variants
                arr.retain(|v| {
                    v.as_str()
                        .map(|s| !s.starts_with("oh-my-opencode-slim"))
                        .unwrap_or(true)
                });
            } else if plugin_name.starts_with("oh-my-opencode-slim") {
                // Adding Slim -> remove all standard OMO variants (but keep slim)
                arr.retain(|v| {
                    v.as_str()
                        .map(|s| {
                            !s.starts_with("oh-my-opencode") || s.starts_with("oh-my-opencode-slim")
                        })
                        .unwrap_or(true)
                });
            }

            let already_exists = arr.iter().any(|v| v.as_str() == Some(plugin_name));
            if !already_exists {
                arr.push(Value::String(plugin_name.to_string()));
            }
        }
        None => {
            config["plugin"] = json!([plugin_name]);
        }
    }

    write_opencode_config(&config)
}

pub fn remove_plugin_by_prefix(prefix: &str) -> Result<(), AppError> {
    let mut config = read_opencode_config()?;

    if let Some(arr) = config.get_mut("plugin").and_then(|v| v.as_array_mut()) {
        arr.retain(|v| {
            v.as_str()
                .map(|s| {
                    if !s.starts_with(prefix) {
                        return true; // Keep: doesn't match prefix at all
                    }
                    let rest = &s[prefix.len()..];
                    rest.starts_with('-')
                })
                .unwrap_or(true)
        });

        if arr.is_empty() {
            config.as_object_mut().map(|obj| obj.remove("plugin"));
        }
    }

    write_opencode_config(&config)
}