use crate::AppService;
use crate::error::AppError;
use models::agents::model_parameter_profile;
use sea_orm::*;
use serde::{Deserialize, Serialize};
use session::Session;
use utoipa::ToSchema;
use uuid::Uuid;

use super::provider::require_system_caller;

#[derive(Debug, Clone, Deserialize, 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, Deserialize, 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, Serialize, 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,
        }
    }
}

impl AppService {
    pub async fn agent_model_parameter_profile_list(
        &self,
        model_version_id: Uuid,
        _ctx: &Session,
    ) -> Result<Vec<ModelParameterProfileResponse>, AppError> {
        let profiles = model_parameter_profile::Entity::find()
            .filter(model_parameter_profile::Column::ModelVersionId.eq(model_version_id))
            .all(&self.db)
            .await?;
        Ok(profiles
            .into_iter()
            .map(ModelParameterProfileResponse::from)
            .collect())
    }

    pub async fn agent_model_parameter_profile_get(
        &self,
        id: i64,
        _ctx: &Session,
    ) -> Result<ModelParameterProfileResponse, AppError> {
        let profile = model_parameter_profile::Entity::find_by_id(id)
            .one(&self.db)
            .await?
            .ok_or(AppError::NotFound(
                "Parameter profile not found".to_string(),
            ))?;
        Ok(ModelParameterProfileResponse::from(profile))
    }

    pub async fn agent_model_parameter_profile_create(
        &self,
        request: CreateModelParameterProfileRequest,
        ctx: &Session,
    ) -> Result<ModelParameterProfileResponse, AppError> {
        require_system_caller(ctx)?;

        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(&self.db).await?;
        Ok(ModelParameterProfileResponse::from(profile))
    }

    pub async fn agent_model_parameter_profile_update(
        &self,
        id: i64,
        request: UpdateModelParameterProfileRequest,
        ctx: &Session,
    ) -> Result<ModelParameterProfileResponse, AppError> {
        require_system_caller(ctx)?;

        let profile = model_parameter_profile::Entity::find_by_id(id)
            .one(&self.db)
            .await?
            .ok_or(AppError::NotFound(
                "Parameter profile not found".to_string(),
            ))?;

        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(&self.db).await?;
        Ok(ModelParameterProfileResponse::from(profile))
    }

    pub async fn agent_model_parameter_profile_delete(
        &self,
        id: i64,
        ctx: &Session,
    ) -> Result<(), AppError> {
        require_system_caller(ctx)?;
        model_parameter_profile::Entity::delete_by_id(id)
            .exec(&self.db)
            .await?;
        Ok(())
    }
}