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 { 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/precision-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 } from "@solidjs/meta"
import { Base64 } from "js-base64"

const ClientOnlyDiff = clientOnly(() => import("@opencode-ai/ui/diff").then((m) => ({ default: m.Diff })))

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")
      return getData(params.shareID)
    },
    {
      deferStream: true,
    },
  )

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

  return (
    <ErrorBoundary
      fallback={(e) => {
        return (
          <Show when={e.message === "SessionDataMissingError"}>
            <NotFound />
          </Show>
        )
      }}
    >
      <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 (
            <>
              <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()} />
              <DiffComponentProvider component={ClientOnlyDiff}>
                <DataProvider data={data()} directory={info().directory}>
                  {iife(() => {
                    const [store, setStore] = createStore({
                      messageId: undefined as string | undefined,
                    })
                    const messages = createMemo(() =>
                      data().sessionID
                        ? (data().message[data().sessionID]?.filter((m) => m.role === "user") ?? []).sort(
                            (a, b) => b.time.created - a.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="h-8 flex gap-4 items-center justify-start self-stretch">
                          <div class="pl-[2.5px] pr-2 flex items-center gap-1.75 bg-surface-strong shadow-xs-border-base">
                            <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-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 class="text-left text-16-medium text-text-strong">{info().title}</div>
                      </div>
                    )

                    const turns = () => (
                      <div class="relative mt-2 pt-6 pb-8 min-w-0 w-full h-full overflow-y-auto no-scrollbar">
                        <div class="px-4">{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}
                                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-146": !wide(),
                              }}
                            >
                              <div
                                classList={{
                                  "w-full flex justify-start items-start min-w-0": true,
                                  "max-w-146 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!}
                                  classes={{
                                    root: "grow",
                                    content: "flex flex-col justify-between items-start",
                                    container:
                                      "w-full pb-20 " +
                                      (wide()
                                        ? "max-w-146 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>
              </DiffComponentProvider>
            </>
          )
        }}
      </Show>
    </ErrorBoundary>
  )
}
