import { FileDiff, Message, Model, Part, Session, SessionStatus, UserMessage } from "@opencode-ai/sdk/v2"
import { SessionTurn } from "@opencode-ai/ui/session-turn"
import { SessionReview } from "@opencode-ai/ui/session-review"
import { DataProvider } from "@opencode-ai/ui/context"
import { DiffComponentProvider } from "@opencode-ai/ui/context/diff"
import { CodeComponentProvider } from "@opencode-ai/ui/context/code"
import { WorkerPoolProvider } from "@opencode-ai/ui/context/worker-pool"
import { createAsync, query, useParams } from "@solidjs/router"
import { createEffect, createMemo, ErrorBoundary, For, Match, Show, Switch } from "solid-js"
import { Share } from "~/core/share"
import { Logo, Mark } from "@opencode-ai/ui/logo"
import { IconButton } from "@opencode-ai/ui/icon-button"
import { ProviderIcon } from "@opencode-ai/ui/provider-icon"
import { createDefaultOptions } from "@opencode-ai/ui/pierre"
import { iife } from "@opencode-ai/util/iife"
import { Binary } from "@opencode-ai/util/binary"
import { NamedError } from "@opencode-ai/util/error"
import { DateTime } from "luxon"
import { SessionMessageRail } from "@opencode-ai/ui/session-message-rail"
import { createStore } from "solid-js/store"
import z from "zod"
import NotFound from "../[...404]"
import { Tabs } from "@opencode-ai/ui/tabs"
import { preloadMultiFileDiff, PreloadMultiFileDiffResult } from "@pierre/diffs/ssr"
import { Diff as SSRDiff } from "@opencode-ai/ui/diff-ssr"
import { clientOnly } from "@solidjs/start"
import { type IconName } from "@opencode-ai/ui/icons/provider"
import { Meta, Title } from "@solidjs/meta"
import { Base64 } from "js-base64"

const ClientOnlyDiff = clientOnly(() => import("@opencode-ai/ui/diff").then((m) => ({ default: m.Diff })))
const ClientOnlyCode = clientOnly(() => import("@opencode-ai/ui/code").then((m) => ({ default: m.Code })))
const ClientOnlyWorkerPoolProvider = clientOnly(() =>
  import("@opencode-ai/ui/pierre/worker").then((m) => ({
    default: (props: { children: any }) => (
      <WorkerPoolProvider pools={m.getWorkerPools()}>{props.children}</WorkerPoolProvider>
    ),
  })),
)

const SessionDataMissingError = NamedError.create(
  "SessionDataMissingError",
  z.object({
    sessionID: z.string(),
    message: z.string().optional(),
  }),
)

const getData = query(async (shareID) => {
  "use server"
  const share = await Share.get(shareID)
  if (!share) throw new SessionDataMissingError({ sessionID: shareID })
  const data = await Share.data(shareID)
  const result: {
    sessionID: string
    shareID: string
    session: Session[]
    session_diff: {
      [sessionID: string]: FileDiff[]
    }
    session_diff_preload: {
      [sessionID: string]: PreloadMultiFileDiffResult<any>[]
    }
    session_diff_preload_split: {
      [sessionID: string]: PreloadMultiFileDiffResult<any>[]
    }
    session_status: {
      [sessionID: string]: SessionStatus
    }
    message: {
      [sessionID: string]: Message[]
    }
    part: {
      [messageID: string]: Part[]
    }
    model: {
      [sessionID: string]: Model[]
    }
  } = {
    sessionID: share.sessionID,
    shareID,
    session: [],
    session_diff: {
      [share.sessionID]: [],
    },
    session_diff_preload: {
      [share.sessionID]: [],
    },
    session_diff_preload_split: {
      [share.sessionID]: [],
    },
    session_status: {
      [share.sessionID]: {
        type: "idle",
      },
    },
    message: {},
    part: {},
    model: {},
  }
  for (const item of data) {
    switch (item.type) {
      case "session":
        result.session.push(item.data)
        break
      case "session_diff":
        result.session_diff[share.sessionID] = item.data
        await Promise.all([
          Promise.all(
            item.data.map(async (diff) =>
              preloadMultiFileDiff<any>({
                oldFile: { name: diff.file, contents: diff.before },
                newFile: { name: diff.file, contents: diff.after },
                options: createDefaultOptions("unified"),
                // annotations,
              }),
            ),
          ).then((r) => (result.session_diff_preload[share.sessionID] = r)),
          Promise.all(
            item.data.map(async (diff) =>
              preloadMultiFileDiff<any>({
                oldFile: { name: diff.file, contents: diff.before },
                newFile: { name: diff.file, contents: diff.after },
                options: createDefaultOptions("split"),
                // annotations,
              }),
            ),
          ).then((r) => (result.session_diff_preload_split[share.sessionID] = r)),
        ])
        break
      case "message":
        result.message[item.data.sessionID] = result.message[item.data.sessionID] ?? []
        result.message[item.data.sessionID].push(item.data)
        break
      case "part":
        result.part[item.data.messageID] = result.part[item.data.messageID] ?? []
        result.part[item.data.messageID].push(item.data)
        break
      case "model":
        result.model[share.sessionID] = item.data
        break
    }
  }
  const match = Binary.search(result.session, share.sessionID, (s) => s.id)
  if (!match.found) throw new SessionDataMissingError({ sessionID: share.sessionID })
  return result
}, "getShareData")

export default function () {
  const params = useParams()
  const data = createAsync(async () => {
    if (!params.shareID) throw new Error("Missing shareID")
    const now = Date.now()
    const data = getData(params.shareID)
    console.log("getData", Date.now() - now)
    return data
  })

  createEffect(() => {
    console.log(data())
  })

  return (
    <ErrorBoundary
      fallback={(error) => {
        if (SessionDataMissingError.isInstance(error)) {
          return <NotFound />
        }
        console.error(error)
        const details = error instanceof Error ? (error.stack ?? error.message) : String(error)
        return (
          <div class="min-h-screen w-full bg-background-base text-text-base flex flex-col items-center justify-center gap-4 p-6 text-center">
            <p class="text-16-medium">Unable to render this share.</p>
            <p class="text-14-regular text-text-weaker">Check the console for more details.</p>
            <pre class="text-12-mono text-left whitespace-pre-wrap break-words w-full max-w-200 bg-background-stronger rounded-md p-4">
              {details}
            </pre>
          </div>
        )
      }}
    >
      <Meta name="robots" content="noindex, nofollow" />
      <Show when={data()}>
        {(data) => {
          const match = createMemo(() => Binary.search(data().session, data().sessionID, (s) => s.id))
          if (!match().found) throw new Error(`Session ${data().sessionID} not found`)
          const info = createMemo(() => data().session[match().index])
          const ogImage = createMemo(() => {
            const models = new Set<string>()
            const messages = data().message[data().sessionID] ?? []
            for (const msg of messages) {
              if (msg.role === "assistant" && msg.modelID) {
                models.add(msg.modelID)
              }
            }
            const modelIDs = Array.from(models)
            const encodedTitle = encodeURIComponent(Base64.encode(encodeURIComponent(info().title.substring(0, 700))))
            let modelParam: string
            if (modelIDs.length === 1) {
              modelParam = modelIDs[0]
            } else if (modelIDs.length === 2) {
              modelParam = encodeURIComponent(`${modelIDs[0]} & ${modelIDs[1]}`)
            } else if (modelIDs.length > 2) {
              modelParam = encodeURIComponent(`${modelIDs[0]} & ${modelIDs.length - 1} others`)
            } else {
              modelParam = "unknown"
            }
            const version = `v${info().version}`
            return `https://social-cards.sst.dev/opencode-share/${encodedTitle}.png?model=${modelParam}&version=${version}&id=${data().shareID}`
          })

          return (
            <>
              <Show when={info().title}>
                <Title>{info().title} | OpenCode</Title>
              </Show>
              <Meta name="description" content="opencode - The AI coding agent built for the terminal." />
              <Meta property="og:image" content={ogImage()} />
              <Meta name="twitter:image" content={ogImage()} />
              <ClientOnlyWorkerPoolProvider>
                <DiffComponentProvider component={ClientOnlyDiff}>
                  <CodeComponentProvider component={ClientOnlyCode}>
                    <DataProvider data={data()} directory={info().directory}>
                      {iife(() => {
                        const [store, setStore] = createStore({
                          messageId: undefined as string | undefined,
                          expandedSteps: {} as Record<string, boolean>,
                        })
                        const messages = createMemo(() =>
                          data().sessionID
                            ? (data().message[data().sessionID]?.filter((m) => m.role === "user") ?? []).sort(
                                (a, b) => a.time.created - b.time.created,
                              )
                            : [],
                        )
                        const firstUserMessage = createMemo(() => messages().at(0))
                        const activeMessage = createMemo(
                          () => messages().find((m) => m.id === store.messageId) ?? firstUserMessage(),
                        )
                        function setActiveMessage(message: UserMessage | undefined) {
                          if (message) {
                            setStore("messageId", message.id)
                          } else {
                            setStore("messageId", undefined)
                          }
                        }
                        const provider = createMemo(() => activeMessage()?.model?.providerID)
                        const modelID = createMemo(() => activeMessage()?.model?.modelID)
                        const model = createMemo(() => data().model[data().sessionID]?.find((m) => m.id === modelID()))
                        const diffs = createMemo(() => {
                          const diffs = data().session_diff[data().sessionID] ?? []
                          const preloaded = data().session_diff_preload[data().sessionID] ?? []
                          return diffs.map((diff) => ({
                            ...diff,
                            preloaded: preloaded.find((d) => d.newFile.name === diff.file),
                          }))
                        })
                        const splitDiffs = createMemo(() => {
                          const diffs = data().session_diff[data().sessionID] ?? []
                          const preloaded = data().session_diff_preload_split[data().sessionID] ?? []
                          return diffs.map((diff) => ({
                            ...diff,
                            preloaded: preloaded.find((d) => d.newFile.name === diff.file),
                          }))
                        })

                        const title = () => (
                          <div class="flex flex-col gap-4">
                            <div class="flex flex-col gap-2 sm:flex-row sm:gap-4 sm:items-center sm:h-8 justify-start self-stretch">
                              <div class="pl-[2.5px] pr-2 flex items-center gap-1.75 bg-surface-strong shadow-xs-border-base w-fit">
                                <Mark class="shrink-0 w-3 my-0.5" />
                                <div class="text-12-mono text-text-base">v{info().version}</div>
                              </div>
                              <div class="flex gap-4 items-center">
                                <div class="flex gap-2 items-center">
                                  <ProviderIcon
                                    id={provider() as IconName}
                                    class="size-3.5 shrink-0 text-icon-strong-base"
                                  />
                                  <div class="text-12-regular text-text-base">{model()?.name ?? modelID()}</div>
                                </div>
                                <div class="text-12-regular text-text-weaker">
                                  {DateTime.fromMillis(info().time.created).toFormat("dd MMM yyyy, HH:mm")}
                                </div>
                              </div>
                            </div>
                            <div class="text-left text-16-medium text-text-strong">{info().title}</div>
                          </div>
                        )

                        const turns = () => (
                          <div class="relative mt-2 pb-8 min-w-0 w-full h-full overflow-y-auto no-scrollbar">
                            <div class="px-4 py-6">{title()}</div>
                            <div class="flex flex-col gap-15 items-start justify-start mt-4">
                              <For each={messages()}>
                                {(message) => (
                                  <SessionTurn
                                    sessionID={data().sessionID}
                                    messageID={message.id}
                                    stepsExpanded={store.expandedSteps[message.id] ?? false}
                                    onStepsExpandedToggle={() => setStore("expandedSteps", message.id, (v) => !v)}
                                    classes={{
                                      root: "min-w-0 w-full relative",
                                      content:
                                        "flex flex-col justify-between !overflow-visible [&_[data-slot=session-turn-message-header]]:top-[-32px]",
                                      container: "px-4",
                                    }}
                                  />
                                )}
                              </For>
                            </div>
                            <div class="px-4 flex items-center justify-center pt-20 pb-8 shrink-0">
                              <Logo class="w-58.5 opacity-12" />
                            </div>
                          </div>
                        )

                        const wide = createMemo(() => diffs().length === 0)

                        return (
                          <div class="relative bg-background-stronger w-screen h-screen overflow-hidden flex flex-col">
                            <header class="h-12 px-6 py-2 flex items-center justify-between self-stretch bg-background-base border-b border-border-weak-base">
                              <div class="">
                                <a href="https://opencode.ai">
                                  <Mark />
                                </a>
                              </div>
                              <div class="flex gap-3 items-center">
                                <IconButton
                                  as={"a"}
                                  href="https://github.com/sst/opencode"
                                  target="_blank"
                                  icon="github"
                                  variant="ghost"
                                />
                                <IconButton
                                  as={"a"}
                                  href="https://opencode.ai/discord"
                                  target="_blank"
                                  icon="discord"
                                  variant="ghost"
                                />
                              </div>
                            </header>
                            <div class="select-text flex flex-col flex-1 min-h-0">
                              <div
                                classList={{
                                  "hidden w-full flex-1 min-h-0": true,
                                  "md:flex": wide(),
                                  "lg:flex": !wide(),
                                }}
                              >
                                <div
                                  classList={{
                                    "@container relative shrink-0 pt-14 flex flex-col gap-10 min-h-0 w-full": true,
                                    "mx-auto max-w-200": !wide(),
                                  }}
                                >
                                  <div
                                    classList={{
                                      "w-full flex justify-start items-start min-w-0": true,
                                      "max-w-200 mx-auto px-6": wide(),
                                      "pr-6 pl-18": !wide() && messages().length > 1,
                                      "px-6": !wide() && messages().length === 1,
                                    }}
                                  >
                                    {title()}
                                  </div>
                                  <div class="flex items-start justify-start h-full min-h-0">
                                    <SessionMessageRail
                                      messages={messages()}
                                      current={activeMessage()}
                                      onMessageSelect={setActiveMessage}
                                      wide={wide()}
                                    />
                                    <SessionTurn
                                      sessionID={data().sessionID}
                                      messageID={store.messageId ?? firstUserMessage()!.id!}
                                      stepsExpanded={
                                        store.expandedSteps[store.messageId ?? firstUserMessage()!.id!] ?? false
                                      }
                                      onStepsExpandedToggle={() => {
                                        const id = store.messageId ?? firstUserMessage()!.id!
                                        setStore("expandedSteps", id, (v) => !v)
                                      }}
                                      classes={{
                                        root: "grow",
                                        content: "flex flex-col justify-between",
                                        container:
                                          "w-full pb-20 " +
                                          (wide()
                                            ? "max-w-200 mx-auto px-6"
                                            : messages().length > 1
                                              ? "pr-6 pl-18"
                                              : "px-6"),
                                      }}
                                    >
                                      <div
                                        classList={{ "w-full flex items-center justify-center pb-8 shrink-0": true }}
                                      >
                                        <Logo class="w-58.5 opacity-12" />
                                      </div>
                                    </SessionTurn>
                                  </div>
                                </div>
                                <Show when={diffs().length > 0}>
                                  <DiffComponentProvider component={SSRDiff}>
                                    <div class="@container relative grow pt-14 flex-1 min-h-0 border-l border-border-weak-base">
                                      <SessionReview
                                        class="@4xl:hidden"
                                        diffs={diffs()}
                                        classes={{
                                          root: "pb-20",
                                          header: "px-6",
                                          container: "px-6",
                                        }}
                                      />
                                      <SessionReview
                                        split
                                        class="hidden @4xl:flex"
                                        diffs={splitDiffs()}
                                        classes={{
                                          root: "pb-20",
                                          header: "px-6",
                                          container: "px-6",
                                        }}
                                      />
                                    </div>
                                  </DiffComponentProvider>
                                </Show>
                              </div>
                              <Switch>
                                <Match when={diffs().length > 0}>
                                  <Tabs classList={{ "md:hidden": wide(), "lg:hidden": !wide() }}>
                                    <Tabs.List>
                                      <Tabs.Trigger value="session" class="w-1/2" classes={{ button: "w-full" }}>
                                        Session
                                      </Tabs.Trigger>
                                      <Tabs.Trigger
                                        value="review"
                                        class="w-1/2 !border-r-0"
                                        classes={{ button: "w-full" }}
                                      >
                                        {diffs().length} Files Changed
                                      </Tabs.Trigger>
                                    </Tabs.List>
                                    <Tabs.Content value="session" class="!overflow-hidden">
                                      {turns()}
                                    </Tabs.Content>
                                    <Tabs.Content
                                      forceMount
                                      value="review"
                                      class="!overflow-hidden hidden data-[selected]:block"
                                    >
                                      <div class="relative h-full pt-8 overflow-y-auto no-scrollbar">
                                        <DiffComponentProvider component={SSRDiff}>
                                          <SessionReview
                                            diffs={diffs()}
                                            classes={{
                                              root: "pb-20",
                                              header: "px-4",
                                              container: "px-4",
                                            }}
                                          />
                                        </DiffComponentProvider>
                                      </div>
                                    </Tabs.Content>
                                  </Tabs>
                                </Match>
                                <Match when={true}>
                                  <div
                                    classList={{ "!overflow-hidden": true, "md:hidden": wide(), "lg:hidden": !wide() }}
                                  >
                                    {turns()}
                                  </div>
                                </Match>
                              </Switch>
                            </div>
                          </div>
                        )
                      })}
                    </DataProvider>
                  </CodeComponentProvider>
                </DiffComponentProvider>
              </ClientOnlyWorkerPoolProvider>
            </>
          )
        }}
      </Show>
    </ErrorBoundary>
  )
}
