import 'dart:convert';

import 'package:bogui/global.dart';
import 'package:bogui/load_env.dart';
import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:openai_gpt3_api/completion.dart';
import 'package:openai_gpt3_api/openai_gpt3_api.dart';

class OpenAI {
  late GPT3 gpt;

  final prompt =
      StateProvider<TextEditingController>((ref) => TextEditingController());
  final isLoading = StateProvider<bool>((ref) => false);
  final temperature = StateProvider<double>((ref) => 0.7);

  Future init() async {
    final env = await loadEnv();
    String openaiSecretFile = '';
    if (env.containsKey('OPENAPI_SECRET_KEY')) {
      openaiSecretFile = env['OPENAPI_SECRET_KEY']!;
    }
    const openaiSecretEnv = String.fromEnvironment('OPENAPI_SECRET_KEY');
    gpt = GPT3(kDebugMode ? openaiSecretFile : openaiSecretEnv);
  }

  Future<String> completionEasy(WidgetRef ref) async {
    if (ref.read(isLoading) || ref.read(prompt).text.length < 2) return '';
    ref.read(isLoading.notifier).state = true;
    late CompletionApiResult anwser;
    try {
      anwser = await gpt.completion(ref.read(prompt).text,
          maxTokens: 250,
          engine: Engine.davinci3,
          temperature: ref.read(temperature),
          echo: false,
          stream: false);
    } catch (e) {
      log.d(e);
      ref.read(prompt).text +=
          "\nJe n'ai pas la bonne clé API secret pour OpenAI, connard.\n$e";
      ref.read(isLoading.notifier).state = false;
      return "\nJe n'ai pas la bonne clé API secret pour OpenAI, connard.\n$e";
    }

    String anwserString = '';
    for (final choice in anwser.choices) {
      anwserString += choice.text;
    }

    ref.read(prompt).text += utf8.decode(anwserString.codeUnits);
    ref.read(isLoading.notifier).state = false;
    ref.read(prompt).selection = TextSelection.fromPosition(
        TextPosition(offset: ref.read(prompt).text.length));
    return anwserString;
  }
}

double truncateDouble(double val, int decimals) {
  String valString = val.toString();
  int dotIndex = valString.indexOf('.');

  // not enough decimals
  int totalDecimals = valString.length - dotIndex - 1;
  if (totalDecimals < decimals) {
    decimals = totalDecimals;
  }

  valString = valString.substring(0, dotIndex + decimals + 1);

  return double.parse(valString);
}