// Copyright: Ankitects Pty Ltd and contributors
// License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html

mod browser_table;
mod search_node;

use std::{str::FromStr, sync::Arc};

use super::{notes::to_note_ids, Backend};
pub(super) use crate::pb::search::search_service::Service as SearchService;
use crate::{
    browser_table::Column,
    pb,
    pb::search::sort_order::Value as SortOrderProto,
    prelude::*,
    search::{replace_search_node, JoinSearches, Node, SortMode},
};

impl SearchService for Backend {
    fn build_search_string(&self, input: pb::search::SearchNode) -> Result<pb::generic::String> {
        let node: Node = input.try_into()?;
        Ok(SearchBuilder::from_root(node).write().into())
    }

    fn search_cards(&self, input: pb::search::SearchRequest) -> Result<pb::search::SearchResponse> {
        self.with_col(|col| {
            let order = input.order.unwrap_or_default().value.into();
            let cids = col.search_cards(&input.search, order)?;
            Ok(pb::search::SearchResponse {
                ids: cids.into_iter().map(|v| v.0).collect(),
            })
        })
    }

    fn search_notes(&self, input: pb::search::SearchRequest) -> Result<pb::search::SearchResponse> {
        self.with_col(|col| {
            let order = input.order.unwrap_or_default().value.into();
            let nids = col.search_notes(&input.search, order)?;
            Ok(pb::search::SearchResponse {
                ids: nids.into_iter().map(|v| v.0).collect(),
            })
        })
    }

    fn join_search_nodes(
        &self,
        input: pb::search::JoinSearchNodesRequest,
    ) -> Result<pb::generic::String> {
        let existing_node: Node = input.existing_node.unwrap_or_default().try_into()?;
        let additional_node: Node = input.additional_node.unwrap_or_default().try_into()?;

        Ok(
            match pb::search::search_node::group::Joiner::from_i32(input.joiner).unwrap_or_default() {
                pb::search::search_node::group::Joiner::And => existing_node.and_flat(additional_node),
                pb::search::search_node::group::Joiner::Or => existing_node.or_flat(additional_node),
            }
            .write()
            .into(),
        )
    }

    fn replace_search_node(
        &self,
        input: pb::search::ReplaceSearchNodeRequest,
    ) -> Result<pb::generic::String> {
        let existing = {
            let node = input.existing_node.unwrap_or_default().try_into()?;
            if let Node::Group(nodes) = node {
                nodes
            } else {
                vec![node]
            }
        };
        let replacement = input.replacement_node.unwrap_or_default().try_into()?;
        Ok(replace_search_node(existing, replacement).into())
    }

    fn find_and_replace(
        &self,
        input: pb::search::FindAndReplaceRequest,
    ) -> Result<pb::collection::OpChangesWithCount> {
        let mut search = if input.regex {
            input.search
        } else {
            regex::escape(&input.search)
        };
        if !input.match_case {
            search = format!("(?i){}", search);
        }
        let mut nids = to_note_ids(input.nids);
        let field_name = if input.field_name.is_empty() {
            None
        } else {
            Some(input.field_name)
        };
        let repl = input.replacement;
        self.with_col(|col| {
            if nids.is_empty() {
                nids = col.search_notes_unordered("")?
            };
            col.find_and_replace(nids, &search, &repl, field_name)
                .map(Into::into)
        })
    }

    fn all_browser_columns(
        &self,
        _input: pb::generic::Empty,
    ) -> Result<pb::search::BrowserColumns> {
        self.with_col(|col| Ok(col.all_browser_columns()))
    }

    fn set_active_browser_columns(
        &self,
        input: pb::generic::StringList,
    ) -> Result<pb::generic::Empty> {
        self.with_col(|col| {
            col.state.active_browser_columns = Some(Arc::new(input.into()));
            Ok(())
        })
        .map(Into::into)
    }

    fn browser_row_for_id(&self, input: pb::generic::Int64) -> Result<pb::search::BrowserRow> {
        self.with_col(|col| col.browser_row_for_id(input.val).map(Into::into))
    }
}

impl From<Option<SortOrderProto>> for SortMode {
    fn from(order: Option<SortOrderProto>) -> Self {
        use pb::search::sort_order::Value as V;
        match order.unwrap_or(V::None(pb::generic::Empty {})) {
            V::None(_) => SortMode::NoOrder,
            V::Custom(s) => SortMode::Custom(s),
            V::Builtin(b) => SortMode::Builtin {
                column: Column::from_str(&b.column).unwrap_or_default(),
                reverse: b.reverse,
            },
        }
    }
}