//! Model parameter profile management — CRUD.

use db::database::AppDatabase;
use models::agents::model_parameter_profile;
use sea_orm::*;
use uuid::Uuid;

use crate::error::AgentError;

#[derive(Debug, Clone, serde::Deserialize, utoipa::ToSchema)]
pub struct CreateModelParameterProfileRequest {
    pub model_version_id: Uuid,
    pub temperature_min: f64,
    pub temperature_max: f64,
    pub top_p_min: f64,
    pub top_p_max: f64,
    #[serde(default)]
    pub frequency_penalty_supported: bool,
    #[serde(default)]
    pub presence_penalty_supported: bool,
}

#[derive(Debug, Clone, serde::Deserialize, utoipa::ToSchema)]
pub struct UpdateModelParameterProfileRequest {
    pub temperature_min: Option<f64>,
    pub temperature_max: Option<f64>,
    pub top_p_min: Option<f64>,
    pub top_p_max: Option<f64>,
    pub frequency_penalty_supported: Option<bool>,
    pub presence_penalty_supported: Option<bool>,
}

#[derive(Debug, Clone, serde::Serialize, utoipa::ToSchema)]
pub struct ModelParameterProfileResponse {
    pub id: i64,
    pub model_version_id: Uuid,
    pub temperature_min: f64,
    pub temperature_max: f64,
    pub top_p_min: f64,
    pub top_p_max: f64,
    pub frequency_penalty_supported: bool,
    pub presence_penalty_supported: bool,
}

impl From<model_parameter_profile::Model> for ModelParameterProfileResponse {
    fn from(p: model_parameter_profile::Model) -> Self {
        Self {
            id: p.id,
            model_version_id: p.model_version_id,
            temperature_min: p.temperature_min,
            temperature_max: p.temperature_max,
            top_p_min: p.top_p_min,
            top_p_max: p.top_p_max,
            frequency_penalty_supported: p.frequency_penalty_supported,
            presence_penalty_supported: p.presence_penalty_supported,
        }
    }
}

pub async fn list_parameter_profiles(
    db: &AppDatabase,
    model_version_id: Uuid,
) -> Result<Vec<ModelParameterProfileResponse>, AgentError> {
    let profiles = model_parameter_profile::Entity::find()
        .filter(model_parameter_profile::Column::ModelVersionId.eq(model_version_id))
        .all(db)
        .await?;
    Ok(profiles
        .into_iter()
        .map(ModelParameterProfileResponse::from)
        .collect())
}

pub async fn get_parameter_profile(
    db: &AppDatabase,
    id: i64,
) -> Result<ModelParameterProfileResponse, AgentError> {
    let profile = model_parameter_profile::Entity::find_by_id(id)
        .one(db)
        .await?
        .ok_or_else(|| AgentError::NotFound(format!("Parameter profile not found: {}", id)))?;
    Ok(ModelParameterProfileResponse::from(profile))
}

pub async fn create_parameter_profile(
    db: &AppDatabase,
    request: CreateModelParameterProfileRequest,
) -> Result<ModelParameterProfileResponse, AgentError> {
    let active = model_parameter_profile::ActiveModel {
        model_version_id: Set(request.model_version_id),
        temperature_min: Set(request.temperature_min),
        temperature_max: Set(request.temperature_max),
        top_p_min: Set(request.top_p_min),
        top_p_max: Set(request.top_p_max),
        frequency_penalty_supported: Set(request.frequency_penalty_supported),
        presence_penalty_supported: Set(request.presence_penalty_supported),
        ..Default::default()
    };
    let profile = active.insert(db).await?;
    Ok(ModelParameterProfileResponse::from(profile))
}

pub async fn update_parameter_profile(
    db: &AppDatabase,
    id: i64,
    request: UpdateModelParameterProfileRequest,
) -> Result<ModelParameterProfileResponse, AgentError> {
    let profile = model_parameter_profile::Entity::find_by_id(id)
        .one(db)
        .await?
        .ok_or_else(|| AgentError::NotFound(format!("Parameter profile not found: {}", id)))?;

    let mut active: model_parameter_profile::ActiveModel = profile.into();
    if let Some(v) = request.temperature_min {
        active.temperature_min = Set(v);
    }
    if let Some(v) = request.temperature_max {
        active.temperature_max = Set(v);
    }
    if let Some(v) = request.top_p_min {
        active.top_p_min = Set(v);
    }
    if let Some(v) = request.top_p_max {
        active.top_p_max = Set(v);
    }
    if let Some(v) = request.frequency_penalty_supported {
        active.frequency_penalty_supported = Set(v);
    }
    if let Some(v) = request.presence_penalty_supported {
        active.presence_penalty_supported = Set(v);
    }

    let profile = active.update(db).await?;
    Ok(ModelParameterProfileResponse::from(profile))
}

pub async fn delete_parameter_profile(db: &AppDatabase, id: i64) -> Result<(), AgentError> {
    model_parameter_profile::Entity::delete_by_id(id)
        .exec(db)
        .await?;
    Ok(())
}