import { getClient } from "@/api/AxiosClient";
import { AutoResizingTextarea } from "@/components/AutoResizingTextarea/AutoResizingTextarea";
import { Button } from "@/components/ui/button";
import {
  Form,
  FormControl,
  FormField,
  FormItem,
  FormLabel,
  FormMessage,
} from "@/components/ui/form";
import { Input } from "@/components/ui/input";
import { useToast } from "@/components/ui/use-toast";
import { useApiCredential } from "@/hooks/useApiCredential";
import { useCredentialGetter } from "@/hooks/useCredentialGetter";
import { CodeEditor } from "@/routes/workflows/components/CodeEditor";
import { copyText } from "@/util/copyText";
import { apiBaseUrl } from "@/util/env";
import { zodResolver } from "@hookform/resolvers/zod";
import { ReloadIcon } from "@radix-ui/react-icons";
import { ToastAction } from "@radix-ui/react-toast";
import { useMutation, useQueryClient } from "@tanstack/react-query";
import { AxiosError } from "axios";
import fetchToCurl from "fetch-to-curl";
import { useState } from "react";
import { useForm, useFormState } from "react-hook-form";
import { Link } from "react-router-dom";
import { z } from "zod";
import { MAX_STEPS_DEFAULT } from "../constants";
import { TaskFormSection } from "./TaskFormSection";

const createNewTaskFormSchema = z
  .object({
    url: z.string().url({
      message: "Invalid URL",
    }),
    webhookCallbackUrl: z.string().or(z.null()).optional(),
    navigationGoal: z.string().or(z.null()).optional(),
    dataExtractionGoal: z.string().or(z.null()).optional(),
    navigationPayload: z.string().or(z.null()).optional(),
    extractedInformationSchema: z.string().or(z.null()).optional(),
    maxStepsOverride: z.number().optional(),
    totpVerificationUrl: z.string().or(z.null()).optional(),
    totpIdentifier: z.string().or(z.null()).optional(),
  })
  .superRefine(
    (
      { navigationGoal, dataExtractionGoal, extractedInformationSchema },
      ctx,
    ) => {
      if (!navigationGoal && !dataExtractionGoal) {
        ctx.addIssue({
          code: z.ZodIssueCode.custom,
          message:
            "At least one of navigation goal or data extraction goal must be provided",
          path: ["navigationGoal"],
        });
        ctx.addIssue({
          code: z.ZodIssueCode.custom,
          message:
            "At least one of navigation goal or data extraction goal must be provided",
          path: ["dataExtractionGoal"],
        });
        return z.NEVER;
      }
      if (extractedInformationSchema) {
        try {
          JSON.parse(extractedInformationSchema);
        } catch (e) {
          ctx.addIssue({
            code: z.ZodIssueCode.custom,
            message: "Invalid JSON",
            path: ["extractedInformationSchema"],
          });
        }
      }
    },
  );

export type CreateNewTaskFormValues = z.infer<typeof createNewTaskFormSchema>;

type Props = {
  initialValues: CreateNewTaskFormValues;
};

function transform(value: unknown) {
  return value === "" ? null : value;
}

function createTaskRequestObject(formValues: CreateNewTaskFormValues) {
  let extractedInformationSchema = null;
  if (formValues.extractedInformationSchema) {
    try {
      extractedInformationSchema = JSON.parse(
        formValues.extractedInformationSchema,
      );
    } catch (e) {
      extractedInformationSchema = formValues.extractedInformationSchema;
    }
  }

  return {
    url: formValues.url,
    webhook_callback_url: transform(formValues.webhookCallbackUrl),
    navigation_goal: transform(formValues.navigationGoal),
    data_extraction_goal: transform(formValues.dataExtractionGoal),
    proxy_location: "RESIDENTIAL",
    navigation_payload: transform(formValues.navigationPayload),
    extracted_information_schema: extractedInformationSchema,
    totp_verification_url: transform(formValues.totpVerificationUrl),
    totp_identifier: transform(formValues.totpIdentifier),
  };
}

function CreateNewTaskForm({ initialValues }: Props) {
  const queryClient = useQueryClient();
  const { toast } = useToast();
  const credentialGetter = useCredentialGetter();
  const apiCredential = useApiCredential();
  const [sections, setSections] = useState<
    Array<"base" | "extraction" | "advanced">
  >(["base"]);

  const form = useForm<CreateNewTaskFormValues>({
    resolver: zodResolver(createNewTaskFormSchema),
    defaultValues: initialValues,
    values: {
      ...initialValues,
      maxStepsOverride: MAX_STEPS_DEFAULT,
    },
  });
  const { errors } = useFormState({ control: form.control });

  const mutation = useMutation({
    mutationFn: async (formValues: CreateNewTaskFormValues) => {
      const taskRequest = createTaskRequestObject(formValues);
      const client = await getClient(credentialGetter);
      const includeOverrideHeader =
        formValues.maxStepsOverride !== MAX_STEPS_DEFAULT;
      return client.post<
        ReturnType<typeof createTaskRequestObject>,
        { data: { task_id: string } }
      >("/tasks", taskRequest, {
        ...(includeOverrideHeader && {
          headers: {
            "x-max-steps-override":
              formValues.maxStepsOverride ?? MAX_STEPS_DEFAULT,
          },
        }),
      });
    },
    onError: (error: AxiosError) => {
      if (error.response?.status === 402) {
        toast({
          variant: "destructive",
          title: "Failed to create task",
          description:
            "You don't have enough credits to run this task. Go to billing to see your credit balance.",
          action: (
            <ToastAction altText="Go to Billing">
              <Button asChild>
                <Link to="billing">Go to Billing</Link>
              </Button>
            </ToastAction>
          ),
        });
        return;
      }
      toast({
        variant: "destructive",
        title: "There was an error creating the task.",
        description: error.message,
      });
    },
    onSuccess: (response) => {
      toast({
        variant: "success",
        title: "Task Created",
        description: `${response.data.task_id} created successfully.`,
        action: (
          <ToastAction altText="View">
            <Button asChild>
              <Link to={`/tasks/${response.data.task_id}`}>View</Link>
            </Button>
          </ToastAction>
        ),
      });
      queryClient.invalidateQueries({
        queryKey: ["tasks"],
      });
    },
  });

  function onSubmit(values: CreateNewTaskFormValues) {
    mutation.mutate(values);
  }

  function toggleSectionVisibility(
    section: "base" | "extraction" | "advanced",
  ) {
    setSections((sections) => {
      if (sections.includes(section)) {
        return sections.filter((s) => s !== section);
      }
      return [...sections, section];
    });
  }

  function isActive(section: "base" | "extraction" | "advanced") {
    return sections.includes(section);
  }

  return (
    <Form {...form}>
      <form onSubmit={form.handleSubmit(onSubmit)} className="space-y-4">
        <TaskFormSection
          index={1}
          title="Base Content"
          active={isActive("base")}
          onClick={() => {
            toggleSectionVisibility("base");
          }}
          hasError={
            typeof errors.url !== "undefined" ||
            typeof errors.navigationGoal !== "undefined"
          }
        >
          {isActive("base") && (
            <div className="space-y-6">
              <div className="space-y-4">
                <FormField
                  control={form.control}
                  name="url"
                  render={({ field }) => (
                    <FormItem>
                      <div className="flex gap-16">
                        <FormLabel>
                          <div className="w-72">
                            <h1 className="text-lg">URL</h1>
                            <h2 className="text-base text-slate-400">
                              The starting URL for the task
                            </h2>
                          </div>
                        </FormLabel>
                        <div className="w-full">
                          <FormControl>
                            <Input placeholder="https://" {...field} />
                          </FormControl>
                          <FormMessage />
                        </div>
                      </div>
                    </FormItem>
                  )}
                />
                <FormField
                  control={form.control}
                  name="navigationGoal"
                  render={({ field }) => (
                    <FormItem>
                      <div className="flex gap-16">
                        <FormLabel>
                          <div className="w-72">
                            <h1 className="text-lg">Navigation Goal</h1>
                            <h2 className="text-base text-slate-400">
                              Where should Skyvern go and what should Skyvern
                              do?
                            </h2>
                          </div>
                        </FormLabel>
                        <div className="w-full">
                          <FormControl>
                            <AutoResizingTextarea
                              placeholder="Use terms like complete or terminate to give completion directions"
                              {...field}
                              value={field.value === null ? "" : field.value}
                            />
                          </FormControl>
                          <FormMessage />
                        </div>
                      </div>
                    </FormItem>
                  )}
                />
              </div>
            </div>
          )}
        </TaskFormSection>
        <TaskFormSection
          index={2}
          title="Extraction"
          active={isActive("extraction")}
          onClick={() => {
            toggleSectionVisibility("extraction");
          }}
          hasError={
            typeof errors.dataExtractionGoal !== "undefined" ||
            typeof errors.extractedInformationSchema !== "undefined"
          }
        >
          {isActive("extraction") && (
            <div className="space-y-6">
              <div className="space-y-4">
                <FormField
                  control={form.control}
                  name="dataExtractionGoal"
                  render={({ field }) => (
                    <FormItem>
                      <div className="flex gap-16">
                        <FormLabel>
                          <div className="w-72">
                            <h1 className="text-lg">Data Extraction Goal</h1>
                            <h2 className="text-base text-slate-400">
                              What outputs are you looking to get?
                            </h2>
                          </div>
                        </FormLabel>
                        <div className="w-full">
                          <FormControl>
                            <AutoResizingTextarea
                              placeholder="e.g. Extract the product price..."
                              {...field}
                              value={field.value === null ? "" : field.value}
                            />
                          </FormControl>
                          <FormMessage />
                        </div>
                      </div>
                    </FormItem>
                  )}
                />
                <FormField
                  control={form.control}
                  name="extractedInformationSchema"
                  render={({ field }) => (
                    <FormItem>
                      <div className="flex gap-16">
                        <FormLabel>
                          <div className="w-72">
                            <h1 className="text-lg">Data Schema</h1>
                            <h2 className="text-base text-slate-400">
                              Specify the output format in JSON
                            </h2>
                          </div>
                        </FormLabel>
                        <div className="w-full">
                          <FormControl>
                            <CodeEditor
                              {...field}
                              language="json"
                              fontSize={12}
                              minHeight="96px"
                              value={
                                field.value === null ||
                                typeof field.value === "undefined"
                                  ? ""
                                  : field.value
                              }
                            />
                          </FormControl>
                          <FormMessage />
                        </div>
                      </div>
                    </FormItem>
                  )}
                />
              </div>
            </div>
          )}
        </TaskFormSection>
        <TaskFormSection
          index={3}
          title="Advanced Settings"
          active={isActive("advanced")}
          onClick={() => {
            toggleSectionVisibility("advanced");
          }}
          hasError={
            typeof errors.navigationPayload !== "undefined" ||
            typeof errors.maxStepsOverride !== "undefined" ||
            typeof errors.webhookCallbackUrl !== "undefined"
          }
        >
          {isActive("advanced") && (
            <div className="space-y-6">
              <div className="space-y-4">
                <FormField
                  control={form.control}
                  name="navigationPayload"
                  render={({ field }) => (
                    <FormItem>
                      <div className="flex gap-16">
                        <FormLabel>
                          <div className="w-72">
                            <h1 className="text-lg">Navigation Payload</h1>
                            <h2 className="text-base text-slate-400">
                              Specify important parameters, routes, or states
                            </h2>
                          </div>
                        </FormLabel>
                        <div className="w-full">
                          <FormControl>
                            <CodeEditor
                              {...field}
                              language="json"
                              fontSize={12}
                              minHeight="96px"
                              value={
                                field.value === null ||
                                typeof field.value === "undefined"
                                  ? ""
                                  : field.value
                              }
                            />
                          </FormControl>
                          <FormMessage />
                        </div>
                      </div>
                    </FormItem>
                  )}
                />
                <FormField
                  control={form.control}
                  name="maxStepsOverride"
                  render={({ field }) => (
                    <FormItem>
                      <div className="flex gap-16">
                        <FormLabel>
                          <div className="w-72">
                            <h1 className="text-lg">Max Steps Override</h1>
                            <h2 className="text-base text-slate-400">
                              Want to allow this task to execute more or less
                              steps than the default?
                            </h2>
                          </div>
                        </FormLabel>
                        <div className="w-full">
                          <FormControl>
                            <Input
                              {...field}
                              type="number"
                              min={1}
                              value={field.value}
                              onChange={(event) => {
                                field.onChange(parseInt(event.target.value));
                              }}
                            />
                          </FormControl>
                          <FormMessage />
                        </div>
                      </div>
                    </FormItem>
                  )}
                />
                <FormField
                  control={form.control}
                  name="webhookCallbackUrl"
                  render={({ field }) => (
                    <FormItem>
                      <div className="flex gap-16">
                        <FormLabel>
                          <div className="w-72">
                            <h1 className="text-lg">Webhook Callback URL</h1>
                            <h2 className="text-base text-slate-400">
                              The URL of a webhook endpoint to send the
                              extracted information
                            </h2>
                          </div>
                        </FormLabel>
                        <div className="w-full">
                          <FormControl>
                            <Input
                              placeholder="https://"
                              {...field}
                              value={field.value === null ? "" : field.value}
                            />
                          </FormControl>
                          <FormMessage />
                        </div>
                      </div>
                    </FormItem>
                  )}
                />
                <FormField
                  control={form.control}
                  name="totpVerificationUrl"
                  render={({ field }) => (
                    <FormItem>
                      <div className="flex gap-16">
                        <FormLabel>
                          <div className="w-72">
                            <h1 className="text-lg">TOTP Verification URL</h1>
                            <h2 className="text-base text-slate-400"></h2>
                          </div>
                        </FormLabel>
                        <div className="w-full">
                          <FormControl>
                            <Input
                              placeholder="https://"
                              {...field}
                              value={field.value === null ? "" : field.value}
                            />
                          </FormControl>
                          <FormMessage />
                        </div>
                      </div>
                    </FormItem>
                  )}
                />
                <FormField
                  control={form.control}
                  name="totpIdentifier"
                  render={({ field }) => (
                    <FormItem>
                      <div className="flex gap-16">
                        <FormLabel>
                          <div className="w-72">
                            <h1 className="text-lg">TOTP Identifier</h1>
                            <h2 className="text-base text-slate-400"></h2>
                          </div>
                        </FormLabel>
                        <div className="w-full">
                          <FormControl>
                            <Input
                              placeholder="Idenfitifer"
                              {...field}
                              value={field.value === null ? "" : field.value}
                            />
                          </FormControl>
                          <FormMessage />
                        </div>
                      </div>
                    </FormItem>
                  )}
                />
              </div>
            </div>
          )}
        </TaskFormSection>

        <div className="flex justify-end gap-3">
          <Button
            type="button"
            variant="secondary"
            onClick={async () => {
              const curl = fetchToCurl({
                method: "POST",
                url: `${apiBaseUrl}/tasks`,
                body: createTaskRequestObject(form.getValues()),
                headers: {
                  "Content-Type": "application/json",
                  "x-api-key": apiCredential ?? "<your-api-key>",
                },
              });
              copyText(curl).then(() => {
                toast({
                  title: "Copied cURL",
                  description: "cURL copied to clipboard",
                });
              });
            }}
          >
            Copy cURL
          </Button>
          <Button type="submit" disabled={mutation.isPending}>
            {mutation.isPending && (
              <ReloadIcon className="mr-2 h-4 w-4 animate-spin" />
            )}
            Create
          </Button>
        </div>
      </form>
    </Form>
  );
}

export { CreateNewTaskForm };