import 'dart:convert';

import 'package:flutter/material.dart';
import 'package:flutter_libepiccash/git_versions.dart' as epic_versions;
import 'package:flutter_libmonero/git_versions.dart' as monero_versions;
import 'package:http/http.dart';
import 'package:lelantus/git_versions.dart' as firo_versions;

import '../../../themes/stack_colors.dart';
import '../../../utilities/logger.dart';
import '../../../utilities/text_styles.dart';

const kGithubAPI = "https://api.github.com";
const kGithubSearch = "/search/commits";
const kGithubHead = "/repos";

enum CommitStatus { isHead, isOldCommit, notACommit, notLoaded }

abstract class GitStatus {
  static String get firoCommit => firo_versions.getPluginVersion();
  static String get epicCashCommit => epic_versions.getPluginVersion();
  static String get moneroCommit => monero_versions.getPluginVersion();

  static CommitStatus? _cachedFiroStatus;
  static Future<CommitStatus> getFiroCommitStatus() async {
    if (_cachedFiroStatus != null) {
      return _cachedFiroStatus!;
    }

    final List<bool> results = await Future.wait([
      _doesCommitExist("cypherstack", "flutter_liblelantus", firoCommit),
      _isHeadCommit("cypherstack", "flutter_liblelantus", "main", firoCommit),
    ]);

    final commitExists = results[0];
    final commitIsHead = results[1];

    if (commitExists && commitIsHead) {
      _cachedFiroStatus = CommitStatus.isHead;
    } else if (commitExists) {
      _cachedFiroStatus = CommitStatus.isOldCommit;
    } else {
      _cachedFiroStatus = CommitStatus.notACommit;
    }

    return _cachedFiroStatus!;
  }

  static CommitStatus? _cachedEpicStatus;
  static Future<CommitStatus> getEpicCommitStatus() async {
    if (_cachedEpicStatus != null) {
      return _cachedEpicStatus!;
    }

    final List<bool> results = await Future.wait([
      _doesCommitExist("cypherstack", "flutter_libepiccash", epicCashCommit),
      _isHeadCommit(
        "cypherstack",
        "flutter_libepiccash",
        "main",
        epicCashCommit,
      ),
    ]);

    final commitExists = results[0];
    final commitIsHead = results[1];

    if (commitExists && commitIsHead) {
      _cachedEpicStatus = CommitStatus.isHead;
    } else if (commitExists) {
      _cachedEpicStatus = CommitStatus.isOldCommit;
    } else {
      _cachedEpicStatus = CommitStatus.notACommit;
    }

    return _cachedEpicStatus!;
  }

  static CommitStatus? _cachedMoneroStatus;
  static Future<CommitStatus> getMoneroCommitStatus() async {
    if (_cachedMoneroStatus != null) {
      return _cachedMoneroStatus!;
    }

    final List<bool> results = await Future.wait([
      _doesCommitExist("cypherstack", "flutter_libmonero", moneroCommit),
      _isHeadCommit("cypherstack", "flutter_libmonero", "main", moneroCommit),
    ]);

    final commitExists = results[0];
    final commitIsHead = results[1];

    if (commitExists && commitIsHead) {
      _cachedMoneroStatus = CommitStatus.isHead;
    } else if (commitExists) {
      _cachedMoneroStatus = CommitStatus.isOldCommit;
    } else {
      _cachedMoneroStatus = CommitStatus.notACommit;
    }

    return _cachedMoneroStatus!;
  }

  static TextStyle styleForStatus(CommitStatus status, BuildContext context) {
    final Color color;
    switch (status) {
      case CommitStatus.isHead:
        color = Theme.of(
          context,
        ).extension<StackColors>()!.accentColorGreen;
        break;
      case CommitStatus.isOldCommit:
        color = Theme.of(
          context,
        ).extension<StackColors>()!.accentColorYellow;
        break;
      case CommitStatus.notACommit:
        color = Theme.of(
          context,
        ).extension<StackColors>()!.accentColorRed;
        break;
      default:
        return STextStyles.itemSubtitle(
          context,
        );
    }

    return STextStyles.itemSubtitle(
      context,
    ).copyWith(color: color);
  }

  static Future<bool> _doesCommitExist(
    String organization,
    String project,
    String commit,
  ) async {
    Logging.instance.log("doesCommitExist", level: LogLevel.Info);
    final Client client = Client();
    try {
      final uri = Uri.parse(
        "$kGithubAPI$kGithubHead/$organization/$project/commits/$commit",
      );

      final commitQuery = await client.get(
        uri,
        headers: {'Content-Type': 'application/json'},
      );

      final response = jsonDecode(commitQuery.body.toString());
      Logging.instance.log(
        "doesCommitExist $project $commit $response",
        level: LogLevel.Info,
      );
      bool isThereCommit;
      try {
        isThereCommit = response['sha'] == commit;
        Logging.instance
            .log("isThereCommit $isThereCommit", level: LogLevel.Info);
        return isThereCommit;
      } catch (e, s) {
        return false;
      }
    } catch (e, s) {
      Logging.instance.log("$e $s", level: LogLevel.Error);
      return false;
    }
  }

  static Future<bool> _isHeadCommit(
    String organization,
    String project,
    String branch,
    String commit,
  ) async {
    Logging.instance.log("doesCommitExist", level: LogLevel.Info);
    final Client client = Client();
    try {
      final uri = Uri.parse(
        "$kGithubAPI$kGithubHead/$organization/$project/commits/$branch",
      );

      final commitQuery = await client.get(
        uri,
        headers: {'Content-Type': 'application/json'},
      );

      final response = jsonDecode(commitQuery.body.toString());
      Logging.instance.log(
        "isHeadCommit $project $commit $branch $response",
        level: LogLevel.Info,
      );
      bool isHead;
      try {
        isHead = response['sha'] == commit;
        Logging.instance.log("isHead $isHead", level: LogLevel.Info);
        return isHead;
      } catch (e, s) {
        return false;
      }
    } catch (e, s) {
      Logging.instance.log("$e $s", level: LogLevel.Error);
      return false;
    }
  }
}