module Web.Controller.InstitutionalKnowledge where

-- IHF Phase 12 — Platform Memory (IHUB-WP-0013 T05)

import Web.Controller.Prelude
import Web.View.InstitutionalKnowledge.Index
import Web.View.InstitutionalKnowledge.Show
import IHP.ModelSupport (sqlQuery)

instance Controller InstitutionalKnowledgeController where
    beforeAction = ensureIsUser

    action InstitutionalKnowledgeAction = do
        entries <- query @InstitutionalKnowledgeEntry
            |> orderByDesc #createdAt
            |> limit 50
            |> fetch
        hubs <- query @Hub |> fetch
        render IndexView { entries, hubs, mQuery = Nothing }

    action ShowInstitutionalKnowledgeAction { knowledgeEntryId } = do
        entry <- fetch knowledgeEntryId
        hub   <- fetch entry.hubId
        mDecision <- case entry.decisionRecordId of
            Nothing  -> pure Nothing
            Just did -> fetchOneOrNothing did
        render ShowView { entry, hub, mDecision }

    action QueryKnowledgeBaseAction = do
        q        <- param @Text "q"
        mHubStr  <- paramOrNothing @Text "hubId"
        hubs     <- query @Hub |> fetch
        entries  <- case mHubStr of
            Nothing ->
                sqlQuery
                    "SELECT * FROM institutional_knowledge_entries \
                    \ WHERE summary_tsv @@ plainto_tsquery('english', ?) \
                    \ ORDER BY ts_rank(summary_tsv, plainto_tsquery('english', ?)) DESC \
                    \ LIMIT 20"
                    (q, q)
            Just hid ->
                sqlQuery
                    "SELECT * FROM institutional_knowledge_entries \
                    \ WHERE hub_id = ? \
                    \   AND summary_tsv @@ plainto_tsquery('english', ?) \
                    \ ORDER BY ts_rank(summary_tsv, plainto_tsquery('english', ?)) DESC \
                    \ LIMIT 20"
                    (hid, q, q)
        render IndexView { entries, hubs, mQuery = Just q }