module Web.Controller.Hubs where

import Web.Types
import Web.View.Hubs.Index
import Web.View.Hubs.Show
import Web.View.Hubs.New
import Web.View.Hubs.Edit
import Web.View.Hubs.TriageDashboard
import Web.View.Hubs.GovernanceDashboard
import Generated.Types
import IHP.Prelude
import IHP.ControllerPrelude

instance Controller HubsController where
    beforeAction = ensureIsUser

    action HubsAction = do
        hubs <- query @Hub |> orderByAsc #createdAt |> fetch
        render IndexView { hubs }

    action NewHubAction = do
        let hub = newRecord @Hub
        render NewView { hub }

    action ShowHubAction { hubId } = autoRefresh do
        hub <- fetch hubId
        widgets <- query @Widget
            |> filterWhere (#hubId, hubId)
            |> orderByAsc #name
            |> fetch
        widgetIds <- pure (map (.id) widgets)
        recentEvents <- sqlQuery
            "SELECT * FROM interaction_events WHERE widget_id = ANY(?) ORDER BY occurred_at DESC LIMIT 50"
            (Only (PGArray widgetIds))
        recentAnnotations <- sqlQuery
            "SELECT * FROM annotations WHERE widget_id = ANY(?) ORDER BY created_at DESC LIMIT 20"
            (Only (PGArray widgetIds))
        render ShowView { hub, widgets, recentEvents, recentAnnotations }

    action CreateHubAction = do
        let hub = newRecord @Hub
        hub
            |> fill @'["slug", "name", "domain"]
            |> validateField #slug nonEmpty
            |> validateField #name nonEmpty
            |> validateField #domain nonEmpty
            |> ifValid \case
                Left hub -> render NewView { hub }
                Right hub -> do
                    hub <- createRecord hub
                    setSuccessMessage "Hub created"
                    redirectTo ShowHubAction { hubId = hub.id }

    action EditHubAction { hubId } = do
        hub <- fetch hubId
        render EditView { hub }

    action UpdateHubAction { hubId } = do
        hub <- fetch hubId
        hub
            |> fill @'["slug", "name", "domain"]
            |> validateField #slug nonEmpty
            |> validateField #name nonEmpty
            |> validateField #domain nonEmpty
            |> ifValid \case
                Left hub -> render EditView { hub }
                Right hub -> do
                    updateRecord hub
                    setSuccessMessage "Hub updated"
                    redirectTo ShowHubAction { hubId = hub.id }

    action DeleteHubAction { hubId } = do
        hub <- fetch hubId
        deleteRecord hub
        setSuccessMessage "Hub deleted"
        redirectTo HubsAction

    action TriageDashboardAction { hubId } = autoRefresh do
        hub     <- fetch hubId
        widgets <- query @Widget
            |> filterWhere (#hubId, hubId)
            |> fetch
        let widgetIds = map (.id) widgets

        -- All candidates for this hub's widgets
        allCandidates <- query @RequirementCandidate
            |> filterWhereIn (#sourceWidgetId, widgetIds)
            |> orderByAsc #createdAt
            |> fetch

        -- Triage queue: open candidates, oldest first
        let triageQueue = filter (\c -> c.status == "open") allCandidates

        -- Recent escalations: last 20
        recentEscalations <- query @RequirementCandidate
            |> filterWhereIn (#sourceWidgetId, widgetIds)
            |> orderByDesc #createdAt
            |> limit 20
            |> fetch

        -- All annotations for category breakdown
        allAnnotations <- query @Annotation
            |> filterWhereIn (#widgetId, widgetIds)
            |> fetch

        render TriageDashboardView
            { hub
            , widgets
            , allCandidates
            , triageQueue
            , recentEscalations
            , allAnnotations
            }

    action GovernanceDashboardAction { hubId } = autoRefresh do
        hub     <- fetch hubId
        widgets <- query @Widget
            |> filterWhere (#hubId, hubId)
            |> fetch
        let widgetIds = map (.id) widgets

        -- All requirements whose source candidate is in this hub's widgets
        allCandidates <- query @RequirementCandidate
            |> filterWhereIn (#sourceWidgetId, widgetIds)
            |> fetch
        let acceptedCandidateIds = map (.id) (filter (\c -> c.status == "accepted") allCandidates)

        allRequirements <- query @Requirement
            |> filterWhereIn (#sourceCandidateId, acceptedCandidateIds)
            |> fetch

        -- Recent decisions (last 20) — scoped to this hub's requirements
        let requirementIds = map (.id) allRequirements
        recentDecisions <- query @DecisionRecord
            |> filterWhereIn (#requirementId, map Just requirementIds)
            |> orderByDesc #decidedAt
            |> limit 20
            |> fetch

        -- All hub decisions (for outcome counts)
        allDecisions <- query @DecisionRecord
            |> filterWhereIn (#requirementId, map Just requirementIds)
            |> fetch

        -- All annotations for traceability coverage
        allAnnotations <- query @Annotation
            |> filterWhereIn (#widgetId, widgetIds)
            |> fetch

        render GovernanceDashboardView
            { hub
            , widgets
            , allCandidates
            , allRequirements
            , recentDecisions
            , allDecisions
            , allAnnotations
            }