import 'package:flutter/material.dart';
import 'package:lucide_icons/lucide_icons.dart';
import 'package:go_router/go_router.dart';

import '../core/constants.dart';

/// Human-readable labels for each backend tool. Kept in sync with
/// `_TOOL_LABELS` in `fabledassistant/services/generation_task.py` so the
/// mobile chips use the same wording as the web ToolCallCard status pills.
const Map<String, String> _toolLabels = {
  'create_note': 'Created note',
  'update_note': 'Updated note',
  'delete_note': 'Deleted note',
  'create_task': 'Created task',
  'update_task': 'Updated task',
  'delete_task': 'Deleted task',
  'read_note': 'Read note',
  'list_notes': 'Listed notes',
  'list_tasks': 'Searched tasks',
  'search_notes': 'Searched notes',
  'create_event': 'Created event',
  'list_events': 'Searched calendar',
  'search_events': 'Searched calendar',
  'update_event': 'Updated event',
  'delete_event': 'Removed event',
  'list_calendars': 'Listed calendars',
  'search_web': 'Searched the web',
  'research_topic': 'Researched topic',
  'search_images': 'Searched images',
  'create_project': 'Created project',
  'update_project': 'Updated project',
  'list_projects': 'Listed projects',
  'get_project': 'Read project',
  'search_projects': 'Searched projects',
  'create_milestone': 'Created milestone',
  'update_milestone': 'Updated milestone',
  'list_milestones': 'Listed milestones',
  'set_rag_scope': 'Changed knowledge scope',
  'calculate': 'Calculated',
  'read_article': 'Read article',
  'get_profile': 'Read profile',
  'update_profile': 'Updated profile',
  'update_person': 'Updated person',
  'update_place': 'Updated place',
  'add_task_log': 'Logged task progress',
};

IconData _iconFor(String fn) {
  if (fn.contains('note')) return LucideIcons.stickyNote;
  if (fn.contains('task')) return LucideIcons.checkCircle2;
  if (fn.contains('event') || fn.contains('calendar')) {
    return LucideIcons.calendarCheck;
  }
  if (fn.contains('project')) return LucideIcons.folder;
  if (fn.contains('milestone')) return LucideIcons.flag;
  if (fn.contains('web') || fn.contains('research') || fn.contains('article')) {
    return LucideIcons.globe;
  }
  if (fn.contains('image')) return LucideIcons.image;
  if (fn.contains('person') || fn.contains('profile')) {
    return LucideIcons.user;
  }
  if (fn.contains('place')) return LucideIcons.mapPin;
  if (fn.contains('rag') || fn.contains('scope')) return LucideIcons.sliders;
  if (fn.contains('calculate')) return LucideIcons.calculator;
  return LucideIcons.sparkles;
}

/// Pull the destination route for this tool call from its `result` payload,
/// if the tool produced something we can navigate to. Returns `null` for
/// read-only / no-target tools so the chip stays visible but non-tappable.
///
/// Backend tool results use the shape:
///   `{success, type: "note"|"task"|"event"|"project"|..., data: {id, ...}}`
/// which is defined alongside each tool handler (see
/// `services/tools/notes.py`, `calendar.py`, etc.).
String? _routeForToolCall(Map<String, dynamic> tc) {
  final result = tc['result'];
  if (result is! Map<String, dynamic>) return null;
  if (result['success'] != true) return null;
  final type = result['type'] as String?;
  final data = result['data'];
  if (type == null || data is! Map<String, dynamic>) return null;
  final id = data['id'];
  if (id is! int) return null;
  switch (type) {
    case 'note':
      return Routes.noteDetail.replaceFirst(':id', '$id');
    case 'task':
      return Routes.taskEdit.replaceFirst(':id', '$id');
    case 'event':
    case 'event_updated':
      // No single-event route on mobile — fall back to the calendar.
      return Routes.calendar;
    case 'project':
      return Routes.projectTasks.replaceFirst(':id', '$id');
    default:
      return null;
  }
}

/// Small status pill rendered inside an assistant message bubble for each
/// tool invocation. Mirrors the web app's ToolCallCard header at a glance —
/// icon + label + success/error tint — and, when the tool produced a
/// navigable entity (note, task, event, project), tapping the chip opens it.
class ToolCallChip extends StatelessWidget {
  final Map<String, dynamic> toolCall;
  const ToolCallChip({super.key, required this.toolCall});

  @override
  Widget build(BuildContext context) {
    final scheme = Theme.of(context).colorScheme;
    final function = (toolCall['function'] as String?) ?? 'tool';
    final status = (toolCall['status'] as String?) ?? 'success';
    final isError = status == 'error';
    final label = _toolLabels[function] ?? function;

    final route = isError ? null : _routeForToolCall(toolCall);

    final bg = isError
        ? scheme.errorContainer.withValues(alpha: 0.55)
        : scheme.primary.withValues(alpha: 0.12);
    final fg = isError ? scheme.onErrorContainer : scheme.primary;

    // Pull the entity title from the result payload so the chip can show
    // "Created note: Grocery List" instead of a generic label. Falls back
    // to the generic label when the tool didn't return a titled entity.
    String? entityTitle;
    final result = toolCall['result'];
    if (result is Map<String, dynamic>) {
      final data = result['data'];
      if (data is Map<String, dynamic>) {
        final t = data['title'];
        if (t is String && t.isNotEmpty) entityTitle = t;
      }
    }
    final displayText =
        entityTitle != null ? '$label: $entityTitle' : label;

    final chip = Container(
      padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 4),
      decoration: BoxDecoration(
        color: bg,
        borderRadius: BorderRadius.circular(10),
        border: Border.all(color: fg.withValues(alpha: 0.35), width: 0.5),
      ),
      child: Row(
        mainAxisSize: MainAxisSize.min,
        children: [
          Icon(_iconFor(function), size: 13, color: fg),
          const SizedBox(width: 5),
          Flexible(
            child: Text(
              displayText,
              style: TextStyle(
                fontSize: 11,
                color: fg,
                fontWeight: FontWeight.w500,
              ),
              overflow: TextOverflow.ellipsis,
            ),
          ),
          if (route != null) ...[
            const SizedBox(width: 4),
            Icon(LucideIcons.arrowRight, size: 11, color: fg),
          ],
        ],
      ),
    );

    if (route == null) return chip;
    return Material(
      color: Colors.transparent,
      borderRadius: BorderRadius.circular(10),
      child: InkWell(
        borderRadius: BorderRadius.circular(10),
        onTap: () => context.push(route),
        child: chip,
      ),
    );
  }
}