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

use crate::{
    backend_proto as pb,
    config::{BoolKey, Weekday},
    prelude::*,
    revlog::RevlogEntry,
    search::SortMode,
};

impl Collection {
    pub(crate) fn graph_data_for_search(
        &mut self,
        search: &str,
        days: u32,
    ) -> Result<pb::GraphsResponse> {
        self.search_cards_into_table(search, SortMode::NoOrder)?;
        let all = search.trim().is_empty();
        self.graph_data(all, days)
    }

    fn graph_data(&mut self, all: bool, days: u32) -> Result<pb::GraphsResponse> {
        let timing = self.timing_today()?;
        let revlog_start = if days > 0 {
            timing
                .next_day_at
                .adding_secs(-(((days as i64) + 1) * 86_400))
        } else {
            TimestampSecs(0)
        };

        let offset = self.local_utc_offset_for_user()?;
        let local_offset_secs = offset.local_minus_utc() as i64;

        let cards = self.storage.all_searched_cards()?;
        let revlog = if all {
            self.storage.get_all_revlog_entries(revlog_start)?
        } else {
            self.storage
                .get_revlog_entries_for_searched_cards(revlog_start)?
        };

        self.storage.clear_searched_cards_table()?;

        Ok(pb::GraphsResponse {
            cards: cards.into_iter().map(Into::into).collect(),
            revlog,
            days_elapsed: timing.days_elapsed,
            next_day_at_secs: timing.next_day_at.0 as u32,
            scheduler_version: self.scheduler_version() as u32,
            local_offset_secs: local_offset_secs as i32,
        })
    }

    pub(crate) fn get_graph_preferences(&self) -> pb::GraphPreferences {
        pb::GraphPreferences {
            calendar_first_day_of_week: self.get_first_day_of_week() as i32,
            card_counts_separate_inactive: self
                .get_config_bool(BoolKey::CardCountsSeparateInactive),
            browser_links_supported: true,
            future_due_show_backlog: self.get_config_bool(BoolKey::FutureDueShowBacklog),
        }
    }

    pub(crate) fn set_graph_preferences(&mut self, prefs: pb::GraphPreferences) -> Result<()> {
        self.set_first_day_of_week(match prefs.calendar_first_day_of_week {
            1 => Weekday::Monday,
            5 => Weekday::Friday,
            6 => Weekday::Saturday,
            _ => Weekday::Sunday,
        })?;
        self.set_config_bool_inner(
            BoolKey::CardCountsSeparateInactive,
            prefs.card_counts_separate_inactive,
        )?;
        self.set_config_bool_inner(BoolKey::FutureDueShowBacklog, prefs.future_due_show_backlog)?;
        Ok(())
    }
}

impl From<RevlogEntry> for pb::RevlogEntry {
    fn from(e: RevlogEntry) -> Self {
        pb::RevlogEntry {
            id: e.id.0,
            cid: e.cid.0,
            usn: e.usn.0,
            button_chosen: e.button_chosen as u32,
            interval: e.interval,
            last_interval: e.last_interval,
            ease_factor: e.ease_factor,
            taken_millis: e.taken_millis,
            review_kind: e.review_kind as i32,
        }
    }
}