"use strict";

const GPT_MODELS = ["gpt-4o-mini", "chatgpt-4o-latest", "gpt-4o", "gpt-4-turbo", "gpt-4", "gpt-3.5-turbo"];
const SYSTEM_MESSAGE = "I'm working on my fantasy map.";

function geneateWithAi(defaultPrompt, onApply) {
  updateValues();

  $("#aiGenerator").dialog({
    title: "AI Text Generator",
    position: {my: "center", at: "center", of: "svg"},
    resizable: false,
    buttons: {
      Generate: function (e) {
        generate(e.target);
      },
      Apply: function () {
        const result = byId("aiGeneratorResult").value;
        if (!result) return tip("No result to apply", true, "error", 4000);
        onApply(result);
        $(this).dialog("close");
      },
      Close: function () {
        $(this).dialog("close");
      }
    }
  });

  if (modules.geneateWithAi) return;
  modules.geneateWithAi = true;

  function updateValues() {
    byId("aiGeneratorResult").value = "";
    byId("aiGeneratorPrompt").value = defaultPrompt;
    byId("aiGeneratorKey").value = localStorage.getItem("fmg-ai-kl") || "";

    const select = byId("aiGeneratorModel");
    select.options.length = 0;
    GPT_MODELS.forEach(model => select.options.add(new Option(model, model)));
    select.value = localStorage.getItem("fmg-ai-model") || GPT_MODELS[0];
  }

  async function generate(button) {
    const key = byId("aiGeneratorKey").value;
    if (!key) return tip("Please enter an OpenAI API key", true, "error", 4000);
    localStorage.setItem("fmg-ai-kl", key);

    const model = byId("aiGeneratorModel").value;
    if (!model) return tip("Please select a model", true, "error", 4000);
    localStorage.setItem("fmg-ai-model", model);

    const prompt = byId("aiGeneratorPrompt").value;
    if (!prompt) return tip("Please enter a prompt", true, "error", 4000);

    try {
      button.disabled = true;
      byId("aiGeneratorResult").disabled = true;

      const response = await fetch("https://api.openai.com/v1/chat/completions", {
        method: "POST",
        headers: {"Content-Type": "application/json", Authorization: `Bearer ${key}`},
        body: JSON.stringify({
          model,
          messages: [
            {role: "system", content: SYSTEM_MESSAGE},
            {role: "user", content: prompt}
          ],
          temperature: 1.2
        })
      });

      if (!response.ok) {
        const json = await response.json();
        throw new Error(json?.error?.message || "Failed to generate");
      }

      const {choices} = await response.json();
      const result = choices[0].message.content;
      byId("aiGeneratorResult").value = result;
    } catch (error) {
      return tip(error.message, true, "error", 4000);
    } finally {
      button.disabled = false;
      byId("aiGeneratorResult").disabled = false;
    }
  }
}