use std::sync::Arc;

use collections::HashMap;
use gpui::AppContext;
use schemars::gen::SchemaGenerator;
use schemars::schema::{InstanceType, Schema, SchemaObject};
use schemars::JsonSchema;
use serde::{Deserialize, Serialize};
use settings::{Settings, SettingsSources};

pub fn init(cx: &mut AppContext) {
    ContextServerSettings::register(cx);
}

#[derive(Deserialize, Serialize, Clone, PartialEq, Eq, JsonSchema, Debug, Default)]
pub struct ServerConfig {
    /// The command to run this context server.
    ///
    /// This will override the command set by an extension.
    pub command: Option<ServerCommand>,
    /// The settings for this context server.
    ///
    /// Consult the documentation for the context server to see what settings
    /// are supported.
    #[schemars(schema_with = "server_config_settings_json_schema")]
    pub settings: Option<serde_json::Value>,
}

fn server_config_settings_json_schema(_generator: &mut SchemaGenerator) -> Schema {
    Schema::Object(SchemaObject {
        instance_type: Some(InstanceType::Object.into()),
        ..Default::default()
    })
}

#[derive(Deserialize, Serialize, Clone, PartialEq, Eq, JsonSchema, Debug)]
pub struct ServerCommand {
    pub path: String,
    pub args: Vec<String>,
    pub env: Option<HashMap<String, String>>,
}

#[derive(Deserialize, Serialize, Default, Clone, PartialEq, Eq, JsonSchema, Debug)]
pub struct ContextServerSettings {
    /// Settings for context servers used in the Assistant.
    #[serde(default)]
    pub context_servers: HashMap<Arc<str>, ServerConfig>,
}

impl Settings for ContextServerSettings {
    const KEY: Option<&'static str> = None;

    type FileContent = Self;

    fn load(
        sources: SettingsSources<Self::FileContent>,
        _: &mut gpui::AppContext,
    ) -> anyhow::Result<Self> {
        sources.json_merge()
    }
}