//! `ModifyMaterialParams` capability integration.

#![allow(
    clippy::missing_errors_doc,
    clippy::must_use_candidate,
    clippy::option_option
)]

use crate::assets::AssetMaterial;
use crate::{Error, GridClient, Simulator};
use libremetaverse_structured_data::{OSD, OSDParser};
use libremetaverse_types::{UUID, compat::CancellationToken};
use std::collections::HashMap;
use std::sync::Arc;
use std::time::{Duration, Instant};

#[derive(Clone, Debug)]
pub struct GLTFMaterialUpdate {
    asset_id: Option<Option<UUID>>,
    object_id: UUID,
    override_: Option<AssetMaterial>,
    side: i32,
}
impl GLTFMaterialUpdate {
    pub fn new() -> Result<Self, Error> {
        Ok(Self {
            asset_id: None,
            object_id: UUID::zero(),
            override_: None,
            side: 0,
        })
    }
    pub fn asset_id(&self) -> Option<Option<UUID>> {
        self.asset_id
    }
    pub fn set_asset_id(&mut self, value: Option<Option<UUID>>) {
        self.asset_id = value;
    }
    pub const fn object_id(&self) -> UUID {
        self.object_id
    }
    pub fn set_object_id(&mut self, value: UUID) {
        self.object_id = value;
    }
    pub fn override_(&self) -> Option<AssetMaterial> {
        self.override_.clone()
    }
    pub fn set_override_(&mut self, value: Option<AssetMaterial>) {
        self.override_ = value;
    }
    pub const fn side(&self) -> i32 {
        self.side
    }
    pub fn set_side(&mut self, value: i32) {
        self.side = value;
    }
}

pub struct ObjectManager {
    client: crate::client_core::ClientWeakHandle,
}
impl ObjectManager {
    pub(crate) fn native_new(client: Option<Arc<GridClient>>) -> Result<Self, Error> {
        Ok(Self {
            client: client.ok_or(Error::ArgumentNull)?.native_weak_handle(),
        })
    }
    fn client(&self) -> Result<GridClient, Error> {
        self.client.upgrade().ok_or(Error::InvalidOperation)
    }

    pub(crate) async fn native_send_material_updates(
        &self,
        sim: Simulator,
        updates: Box<dyn Iterator<Item = GLTFMaterialUpdate>>,
        cancellation_token: Option<CancellationToken>,
    ) -> Result<bool, Error> {
        let Some(caps) = sim.native_caps() else {
            return Ok(false);
        };
        let deadline = Instant::now() + Duration::from_secs(2);
        let uri = loop {
            if let Some(uri) = caps.capability_uri("ModifyMaterialParams".into())? {
                break uri;
            }
            if caps.seed_request_finished() || Instant::now() >= deadline {
                return Ok(false);
            }
            std::thread::sleep(Duration::from_millis(1));
        };
        let mut body = Vec::new();
        for update in updates {
            if update.side < 0 {
                return Err(Error::Argument);
            }
            let mut entry = HashMap::from([
                ("object_id".into(), OSD::UUID(update.object_id)),
                ("side".into(), OSD::Integer(update.side)),
            ]);
            if let Some(Some(asset_id)) = update.asset_id {
                entry.insert("asset_id".into(), OSD::UUID(asset_id));
            }
            if let Some(material) = update.override_ {
                entry.insert("gltf_json".into(), OSD::String(material.to_json()?));
            } else if update.asset_id.flatten().is_none() {
                entry.insert("gltf_json".into(), OSD::String(String::new()));
            }
            body.push(OSD::Map(entry));
        }
        if body.is_empty() {
            return Err(Error::Argument);
        }
        let payload = OSDParser::serialize_llsd_xml_bytes(OSD::Array(body))?;
        let client = self.client()?;
        let (response, bytes) = client
            .native_http_caps_client()
            .post_with_uri_string_bytes_cancellation_token_i_progress(
                uri,
                "application/llsd+xml".into(),
                payload,
                cancellation_token.unwrap_or_default(),
                None,
            )
            .await?;
        if !(200..300).contains(&response.status_code) {
            return Ok(false);
        }
        let response: serde_json::Value =
            serde_json::from_slice(&bytes).map_err(|_| Error::Argument)?;
        Ok(response
            .get("success")
            .and_then(serde_json::Value::as_bool)
            .unwrap_or(false))
    }
    pub(crate) async fn native_set_material_override(
        &self,
        sim: Simulator,
        object_id: UUID,
        side: i32,
        override_material: AssetMaterial,
        cancellation_token: Option<CancellationToken>,
    ) -> Result<bool, Error> {
        let mut update = GLTFMaterialUpdate::new()?;
        update.object_id = object_id;
        update.side = side;
        update.override_ = Some(override_material);
        self.native_send_material_updates(
            sim,
            Box::new(std::iter::once(update)),
            cancellation_token,
        )
        .await
    }
    pub(crate) async fn native_clear_material_override(
        &self,
        sim: Simulator,
        object_id: UUID,
        side: i32,
        cancellation_token: Option<CancellationToken>,
    ) -> Result<bool, Error> {
        let mut update = GLTFMaterialUpdate::new()?;
        update.object_id = object_id;
        update.side = side;
        self.native_send_material_updates(
            sim,
            Box::new(std::iter::once(update)),
            cancellation_token,
        )
        .await
    }
    pub(crate) async fn native_apply_material(
        &self,
        sim: Simulator,
        object_id: UUID,
        side: i32,
        material_asset_id: UUID,
        override_material: Option<AssetMaterial>,
        cancellation_token: Option<CancellationToken>,
    ) -> Result<bool, Error> {
        let mut update = GLTFMaterialUpdate::new()?;
        update.object_id = object_id;
        update.side = side;
        update.asset_id = Some(Some(material_asset_id));
        update.override_ = override_material;
        self.native_send_material_updates(
            sim,
            Box::new(std::iter::once(update)),
            cancellation_token,
        )
        .await
    }
}