import { keyboardRegistry } from "../keyboard-registry"
import { instances, activeInstanceId, setActiveInstanceId } from "../../stores/instances"
import { activeSessionId, getVisibleSessionIds, setActiveSession, setActiveSessionFromList } from "../../stores/sessions"

export function registerNavigationShortcuts() {
  const isMac = () => navigator.platform.toLowerCase().includes("mac")



  keyboardRegistry.register({
    id: "instance-prev",
    key: "[",
    modifiers: { ctrl: !isMac(), meta: isMac() },
    handler: () => {
      const ids = Array.from(instances().keys())
      if (ids.length <= 1) return
      const current = ids.indexOf(activeInstanceId() || "")
      const prev = current <= 0 ? ids.length - 1 : current - 1
      if (ids[prev]) setActiveInstanceId(ids[prev])
    },
    description: "previous instance",
    context: "global",
  })

  keyboardRegistry.register({
    id: "instance-next",
    key: "]",
    modifiers: { ctrl: !isMac(), meta: isMac() },
    handler: () => {
      const ids = Array.from(instances().keys())
      if (ids.length <= 1) return
      const current = ids.indexOf(activeInstanceId() || "")
      const next = (current + 1) % ids.length
      if (ids[next]) setActiveInstanceId(ids[next])
    },
    description: "next instance",
    context: "global",
  })

  keyboardRegistry.register({
    id: "session-prev",
    key: "[",
    modifiers: { ctrl: !isMac(), meta: isMac(), shift: true },
    handler: () => {
      const instanceId = activeInstanceId()
      if (!instanceId) return

      const navigationIds = getVisibleSessionIds(instanceId)
      if (navigationIds.length === 0) return

      const currentActiveId = activeSessionId().get(instanceId) ?? ""
      const currentIndex = navigationIds.indexOf(currentActiveId)

      const targetIndex =
        currentIndex === -1
          ? navigationIds.length - 1
          : currentIndex <= 0
            ? navigationIds.length - 1
            : currentIndex - 1

      const targetSessionId = navigationIds[targetIndex]
      if (targetSessionId) {
        setActiveSessionFromList(instanceId, targetSessionId)
      }
    },
    description: "previous session",
    context: "global",
  })

  keyboardRegistry.register({
    id: "session-next",
    key: "]",
    modifiers: { ctrl: !isMac(), meta: isMac(), shift: true },
    handler: () => {
      const instanceId = activeInstanceId()
      if (!instanceId) return

      const navigationIds = getVisibleSessionIds(instanceId)
      if (navigationIds.length === 0) return

      const currentActiveId = activeSessionId().get(instanceId) ?? ""
      const currentIndex = navigationIds.indexOf(currentActiveId)
      const targetIndex = (currentIndex + 1 + navigationIds.length) % navigationIds.length

      const targetSessionId = navigationIds[targetIndex]
      if (targetSessionId) {
        setActiveSessionFromList(instanceId, targetSessionId)
      }
    },
    description: "next session",
    context: "global",
  })

  keyboardRegistry.register({
    id: "switch-to-info",
    key: "l",
    modifiers: { ctrl: !isMac(), meta: isMac(), shift: true },
    handler: () => {
      const instanceId = activeInstanceId()
      if (instanceId) setActiveSession(instanceId, "info")
    },
    description: "info tab",
    context: "global",
  })
}