// SPDX-License-Identifier: AGPL-3.0-or-later

use crate::api::generated::types as generated_types;

use super::client::{AdminApiClient, ApiError, ApiResult};
#[cfg(test)]
use super::types::AuditLogEntry;
use super::types::AuditLogsListResponse;

pub struct SearchAuditLogsParams {
    pub query: Option<String>,
    pub admin_user_id: Option<String>,
    pub target_id: Option<String>,
    pub target_type: Option<String>,
    pub sort_by: Option<String>,
    pub sort_order: Option<String>,
    pub limit: u32,
    pub offset: u32,
}

impl AdminApiClient {
    pub async fn search_audit_logs(
        &self,
        params: &SearchAuditLogsParams,
    ) -> ApiResult<AuditLogsListResponse> {
        let body = generated_types::SearchAuditLogsRequest {
            admin_user_id: nonempty_string(params.admin_user_id.as_deref())
                .map(generated_types::SnowflakeType::from),
            limit: Some(
                crate::api::generated::nonzero_u32(params.limit, "limit")
                    .map_err(ApiError::Parse)?,
            ),
            offset: Some(i64::from(params.offset)),
            query: nonempty_string(params.query.as_deref()),
            sort_by: params.sort_by.as_deref().map(audit_sort_by).transpose()?,
            sort_order: params
                .sort_order
                .as_deref()
                .map(audit_sort_order)
                .transpose()?,
            target_id: nonempty_string(params.target_id.as_deref()),
            target_type: nonempty_string(params.target_type.as_deref()),
        };
        let body = serde_json::to_value(&body).map_err(|e| ApiError::Parse(e.to_string()))?;
        self.post("/admin/audit-logs/search", Some(&body)).await
    }
}

#[cfg(test)]
fn audit_logs_response(
    response: generated_types::AuditLogsListResponseSchema,
) -> ApiResult<AuditLogsListResponse> {
    Ok(AuditLogsListResponse {
        logs: response.logs.into_iter().map(audit_log_entry).collect(),
        total: crate::api::generated::number_to_u64(response.total, "total")
            .map_err(ApiError::Parse)?,
    })
}

#[cfg(test)]
fn audit_log_entry(entry: generated_types::AuditLogsListResponseSchemaLogsItem) -> AuditLogEntry {
    AuditLogEntry {
        log_id: String::from(entry.log_id),
        admin_user_id: String::from(entry.admin_user_id),
        admin_user: None,
        action: entry.action,
        target_id: entry.target_id,
        target_type: entry.target_type,
        target_user: None,
        target_guild: None,
        target_channel: None,
        related_users: Default::default(),
        related_guilds: Default::default(),
        related_channels: Default::default(),
        audit_log_reason: entry.audit_log_reason,
        metadata: entry.metadata,
        created_at: entry.created_at,
    }
}

fn audit_sort_by(value: &str) -> ApiResult<generated_types::SearchAuditLogsRequestSortBy> {
    let value = match value {
        "created_at" => "createdAt",
        value => value,
    };
    generated_types::SearchAuditLogsRequestSortBy::try_from(value)
        .map_err(|e| ApiError::Parse(e.to_string()))
}

fn audit_sort_order(value: &str) -> ApiResult<generated_types::SearchAuditLogsRequestSortOrder> {
    generated_types::SearchAuditLogsRequestSortOrder::try_from(value)
        .map_err(|e| ApiError::Parse(e.to_string()))
}

fn nonempty_string(value: Option<&str>) -> Option<String> {
    value
        .filter(|value| !value.is_empty())
        .map(std::borrow::ToOwned::to_owned)
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn accepts_route_sort_aliases() {
        assert_eq!(
            audit_sort_by("created_at").unwrap().to_string(),
            "createdAt"
        );
        assert_eq!(audit_sort_by("createdAt").unwrap().to_string(), "createdAt");
        assert_eq!(audit_sort_order("desc").unwrap().to_string(), "desc");
    }

    #[test]
    fn rejects_lossy_audit_totals() {
        let response = generated_types::AuditLogsListResponseSchema {
            logs: Vec::new(),
            total: 1.5,
        };
        assert!(audit_logs_response(response).is_err());
    }
}