import { colors, Command, FolderService, microdiff } from "./deps.ts";
import { requireLogin, resolveWorkspace, validatePath } from "./context.ts";
import {
  Difference,
  GlobalOptions,
  PushDiffs,
  Resource,
  setValueByPath,
} from "./types.ts";
import {
  array,
  decoverto,
  map,
  MapShape,
  model,
  property,
} from "./decoverto.ts";

@model()
export class FolderFile implements Resource, PushDiffs {
  @property(array(() => String))
  owners: Array<string> | undefined;
  @property(
    map(
      () => String,
      () => Boolean,
      { shape: MapShape.Object }
    )
  )
  extra_perms: Map<string, boolean> | undefined;
  @property(() => String)
  display_name: string | undefined;

  async push(workspace: string, remotePath: string): Promise<void> {
    if (remotePath.startsWith("/")) {
      remotePath = remotePath.substring(1);
    }
    if (remotePath.startsWith("f/")) {
      remotePath = remotePath.substring(2);
    }

    await this.pushDiffs(
      workspace,
      remotePath,
      microdiff({}, this, { cyclesFix: false })
    );
  }

  async pushDiffs(
    workspace: string,
    remotePath: string,
    diffs: Difference[]
  ): Promise<void> {
    if (remotePath.startsWith("/")) {
      remotePath = remotePath.substring(1);
    }
    if (remotePath.startsWith("f/")) {
      remotePath = remotePath.substring(2);
    }

    // TODO: Support this in backend
    let exists: boolean;
    try {
      exists = !!(await FolderService.getFolder({
        workspace,
        name: remotePath,
      }));
    } catch {
      exists = false;
    }
    if (exists) {
      console.log(
        colors.bold.yellow(
          `Applying ${diffs.length} diffs to existing folder... ${remotePath}`
        )
      );

      const changeset: {
        owners?: string[] | undefined;
        extra_perms?: any;
        display_name?: string | undefined;
      } = {};
      for (const diff of diffs) {
        if (
          diff.type !== "REMOVE" &&
          (diff.path.length !== 1 ||
            !["owners", "extra_perms", "display_name"].includes(
              diff.path[0] as string
            ))
        ) {
          console.log(diff.path);
          throw new Error("Invalid folder diff with path " + diff.path);
        }
        if (diff.type === "CREATE" || diff.type === "CHANGE") {
          setValueByPath(changeset, diff.path, diff.value);
        } else if (diff.type === "REMOVE") {
          setValueByPath(changeset, diff.path, null);
        }
      }

      const hasChanges = Object.values(changeset).some(
        (v) => v !== null && typeof v !== "undefined"
      );
      if (!hasChanges) {
        return;
      }
      try {
        await FolderService.updateFolder({
          workspace: workspace,
          name: remotePath,
          requestBody: {
            ...changeset,
            extra_perms: changeset.extra_perms
              ? Object.fromEntries(this.extra_perms?.entries() ?? [])
              : undefined,
          },
        });
      } catch (e) {
        console.error(colors.red.bold(e.body));
        throw e;
      }
    } else {
      console.log(colors.bold.yellow("Creating new folder: " + remotePath));
      await FolderService.createFolder({
        workspace: workspace,
        requestBody: {
          name: remotePath,
          extra_perms: Object.fromEntries(this.extra_perms?.entries() ?? []),
          owners: this.owners,
        },
      });
    }
  }
}

async function push(opts: GlobalOptions, filePath: string, remotePath: string) {
  const workspace = await resolveWorkspace(opts);
  await requireLogin(opts);

  if (!validatePath(remotePath)) {
    return;
  }

  const fstat = await Deno.stat(filePath);
  if (!fstat.isFile) {
    throw new Error("file path must refer to a file.");
  }

  console.log(colors.bold.yellow("Pushing resource..."));

  await pushFolder(workspace.workspaceId, filePath, remotePath);
  console.log(colors.bold.underline.green("Resource pushed"));
}

export async function pushFolder(
  workspace: string,
  filePath: string,
  remotePath: string
) {
  const data = decoverto
    .type(FolderFile)
    .rawToInstance(await Deno.readTextFile(filePath));
  data.push(workspace, remotePath);
}

const command = new Command()
  .description("resource related commands")
  .command(
    "push",
    "push a local folder spec. This overrides any remote versions."
  )
  .arguments("<file_path:string> <remote_path:string>")
  .action(push as any);

export default command;