import { useId, useState } from "react"

import type { FlowDef_Input } from "@/client"
import { Button } from "@/components/ui/button"
import { Checkbox } from "@/components/ui/checkbox"
import {
  Dialog,
  DialogContent,
  DialogDescription,
  DialogFooter,
  DialogHeader,
  DialogTitle,
} from "@/components/ui/dialog"
import { Switch } from "@/components/ui/switch"
import { BoundarySections } from "./FlowBoundary"
import { PanelSection, PanelTitle, SidePanel } from "./SidePanel"

/**
 * The flow's own settings, in the same panel its nodes use — down to where the
 * name sits and how confirming a new one works.
 */
export function FlowPanel({
  open,
  definition,
  nodeCount,
  onChange,
  onDelete,
  hasDraft,
  enabled,
  toggling,
  onToggleEnabled,
  onClose,
}: {
  open: boolean
  definition: FlowDef_Input
  nodeCount: number
  onChange: (next: FlowDef_Input) => void
  onDelete: (withRuns: boolean) => void
  hasDraft: boolean
  enabled: boolean
  toggling: boolean
  onToggleEnabled: (next: boolean) => void
  onClose: () => void
}) {
  const [confirmOpen, setConfirmOpen] = useState(false)
  const [withRuns, setWithRuns] = useState(false)

  return (
    <>
      <SidePanel
        open={open}
        label="Flow settings"
        testId="flow-panel"
        bodyKey={definition.name}
        onClose={onClose}
        header={
          <PanelTitle
            value={definition.title ?? ""}
            placeholder={definition.name}
            label="Flow title"
            onConfirm={(title) => onChange({ ...definition, title })}
          />
        }
        footer={
          <Button
            variant="ghost"
            size="sm"
            className="text-destructive hover:text-destructive"
            onClick={() => {
              setWithRuns(false)
              setConfirmOpen(true)
            }}
            data-testid="delete-flow"
          >
            Delete flow
          </Button>
        }
      >
        <div className="grid gap-6 p-4">
          <PanelSection
            title="Running"
            className="gap-3"
            help="While this is on, the engine keeps the flow's subscriptions, schedules and webhooks live. Off, none of it is subscribed, scheduled or reachable."
          >
            <div className="flex items-center justify-between gap-3">
              <p className="text-sm text-muted-foreground">
                {enabled ? "Live" : "Stopped"}
              </p>
              <Switch
                checked={enabled}
                disabled={toggling}
                onCheckedChange={onToggleEnabled}
                aria-label="Run this flow"
                data-testid="flow-enabled"
              />
            </div>
          </PanelSection>

          <BoundarySections
            flow={definition.name}
            definition={definition}
            running={enabled}
            onChange={onChange}
          />

          <PanelSection
            title="Contents"
            className="gap-3"
            help={
              <>
                Every message in this flow is named under{" "}
                <span className="font-mono">{definition.name}</span>, so two
                flows can use the same short name without colliding.
              </>
            }
          >
            <p className="text-sm text-muted-foreground">
              {nodeCount === 0
                ? "No nodes yet."
                : `${nodeCount} node${nodeCount === 1 ? "" : "s"}`}
            </p>
          </PanelSection>

          {hasDraft ? (
            <PanelSection
              title="Unpublished changes"
              className="gap-3"
              help="Edits are kept as a draft until you publish them. The bar below publishes this one, or discards it."
            >
              <p className="text-sm text-muted-foreground">
                The engine is still running the last published version.
              </p>
            </PanelSection>
          ) : null}
        </div>
      </SidePanel>

      <Dialog open={confirmOpen} onOpenChange={setConfirmOpen}>
        <DialogContent>
          <DialogHeader>
            <DialogTitle>
              Delete {definition.title || definition.name}?
            </DialogTitle>
            <DialogDescription>
              This removes the flow and the code of its{" "}
              {nodeCount === 1 ? "node" : `${nodeCount} nodes`}. Its history
              stays in the flow store's git repository.
            </DialogDescription>
          </DialogHeader>
          <AlsoDeleteRuns checked={withRuns} onCheckedChange={setWithRuns} />
          <DialogFooter>
            <Button variant="outline" onClick={() => setConfirmOpen(false)}>
              Keep it
            </Button>
            <Button
              variant="destructive"
              onClick={() => {
                setConfirmOpen(false)
                onDelete(withRuns)
              }}
              data-testid="confirm-delete-flow"
            >
              Delete flow
            </Button>
          </DialogFooter>
        </DialogContent>
      </Dialog>
    </>
  )
}

/**
 * Whether deleting a flow takes its runs along. Off by default: a run is a
 * record of what ran, and keeping one keeps the artifacts it recorded.
 */
export function AlsoDeleteRuns({
  checked,
  onCheckedChange,
  plural = false,
}: {
  checked: boolean
  onCheckedChange: (checked: boolean) => void
  plural?: boolean
}) {
  const id = useId()
  return (
    <div className="grid gap-1">
      <label htmlFor={id} className="flex items-center gap-2 text-sm">
        <Checkbox
          id={id}
          checked={checked}
          onCheckedChange={(next) => onCheckedChange(next === true)}
          data-testid="delete-flow-runs"
        />
        Also delete {plural ? "their" : "its"} runs
      </label>
      <p className="text-sm text-muted-foreground">
        Otherwise the runs stay, and keep their artifacts on disk.
      </p>
    </div>
  )
}