import type { CallTemplateFunctionArgs, Context, PluginDefinition } from "@yaakapp/api";
import slugify from "slugify";

const STORE_NONE = "none";
const STORE_FOREVER = "forever";
const STORE_EXPIRE = "expire";

interface Saved {
  value: string;
  createdAt: number;
}

export const plugin: PluginDefinition = {
  templateFunctions: [
    {
      name: "prompt.text",
      description: "Prompt the user for input when sending a request",
      previewType: "click",
      previewArgs: ["label"],
      args: [
        {
          type: "text",
          name: "label",
          label: "Label",
          optional: true,
          dynamic(_ctx, args) {
            if (
              args.values.store === STORE_EXPIRE ||
              (args.values.store === STORE_FOREVER && !args.values.key)
            ) {
              return { optional: false };
            }
          },
        },
        {
          type: "select",
          name: "store",
          label: "Store Input",
          defaultValue: STORE_NONE,
          options: [
            { label: "Never", value: STORE_NONE },
            { label: "Expire", value: STORE_EXPIRE },
            { label: "Forever", value: STORE_FOREVER },
          ],
        },
        {
          type: "h_stack",
          dynamic(_ctx, args) {
            return { hidden: args.values.store === STORE_NONE };
          },
          inputs: [
            {
              type: "text",
              name: "namespace",
              label: "Namespace",
              // oxlint-disable-next-line no-template-curly-in-string -- Yaak template syntax
              defaultValue: "${[ctx.workspace()]}",
              optional: true,
            },
            {
              type: "text",
              name: "key",
              label: "Key (defaults to Label)",
              optional: true,
              dynamic(_ctx, args) {
                return { placeholder: String(args.values.label || "") };
              },
            },
            {
              type: "text",
              name: "ttl",
              label: "TTL (seconds)",
              placeholder: "0",
              defaultValue: "0",
              optional: true,
              dynamic(_ctx, args) {
                return { hidden: args.values.store !== STORE_EXPIRE };
              },
            },
          ],
        },
        {
          type: "banner",
          color: "info",
          inputs: [],
          dynamic(_ctx, args) {
            let key: string;
            try {
              key = buildKey(args);
            } catch (err) {
              return { color: "danger", inputs: [{ type: "markdown", content: String(err) }] };
            }
            return {
              hidden: args.values.store === STORE_NONE,
              inputs: [
                {
                  type: "markdown",
                  content: [`Value will be saved under: \`${key}\``].join("\n\n"),
                },
              ],
            };
          },
        },
        {
          type: "accordion",
          label: "Advanced",
          inputs: [
            {
              type: "text",
              name: "title",
              label: "Prompt Title",
              optional: true,
              placeholder: "Enter Value",
            },
            { type: "text", name: "defaultValue", label: "Default Value", optional: true },
            { type: "text", name: "placeholder", label: "Input Placeholder", optional: true },
            { type: "checkbox", name: "password", label: "Mask Value" },
          ],
        },
      ],
      async onRender(ctx: Context, args: CallTemplateFunctionArgs): Promise<string | null> {
        if (args.purpose !== "send") return null;

        if (args.values.store !== STORE_NONE && !args.values.namespace) {
          throw new Error("Namespace is required when storing values");
        }

        const existing = await maybeGetValue(ctx, args);
        if (existing != null) {
          return existing;
        }

        const value = await ctx.prompt.text({
          id: `prompt-${args.values.label ?? "none"}`,
          label: String(args.values.label || "Value"),
          title: String(args.values.title ?? "Enter Value"),
          defaultValue: String(args.values.defaultValue ?? ""),
          placeholder: String(args.values.placeholder ?? ""),
          password: Boolean(args.values.password),
          required: false,
        });

        if (value == null) {
          throw new Error("Prompt cancelled");
        }

        if (args.values.store !== STORE_NONE) {
          await maybeSetValue(ctx, args, value);
        }

        return value;
      },
    },
  ],
};

function buildKey(args: CallTemplateFunctionArgs) {
  if (!args.values.key && !args.values.label) {
    throw new Error("A label or key is required when storing values");
  }
  return [args.values.namespace, args.values.key || args.values.label]
    .filter((v) => !!v)
    .map((v) => slugify(String(v), { lower: true, trim: true }))
    .join(".");
}

async function maybeGetValue(ctx: Context, args: CallTemplateFunctionArgs) {
  if (args.values.store === STORE_NONE) return null;

  const existing = await ctx.store.get<Saved>(buildKey(args));
  if (existing == null) {
    return null;
  }

  if (args.values.store === STORE_FOREVER) {
    return existing.value;
  }

  const ttlSeconds = Number.parseInt(String(args.values.ttl), 10) || 0;
  const ageSeconds = (Date.now() - existing.createdAt) / 1000;
  if (ageSeconds > ttlSeconds) {
    ctx.store.delete(buildKey(args)).catch(console.error);
    return null;
  }

  return existing.value;
}

async function maybeSetValue(ctx: Context, args: CallTemplateFunctionArgs, value: string) {
  if (args.values.store === STORE_NONE) {
    return;
  }

  await ctx.store.set<Saved>(buildKey(args), { value, createdAt: Date.now() });
}