import {
  BadRequestException,
  Body,
  Controller,
  Get,
  NotFoundException,
  Param,
  Post,
} from '@nestjs/common';
import {
  ApiOperation,
  ApiProperty,
  ApiResponse,
  ApiTags,
} from '@nestjs/swagger';
import type { DeviceInfo } from './mesh.service.js';
import { MeshService } from './mesh.service.js';

export class InjectMessageDto {
  @ApiProperty({ description: 'Message text', example: 'external trigger' })
  text!: string;
  @ApiProperty({
    required: false,
    description:
      'Sender node number (integer in 1..0xffffffff); omitted when the external source has no mesh identity.',
    example: 987654321,
  })
  from?: number;
}

export class SendTextDto {
  @ApiProperty({ description: 'Message text', example: 'hello' })
  text!: string;
  @ApiProperty({
    required: false,
    description:
      'Send target. Resolution order: omitted or "" → broadcast (0xffffffff); number → used as-is (integer in 1..0xffffffff); numeric string → that node number; "!b" or "broadcast" (case-insensitive) → broadcast; anything else is looked up by name — exact long/short name, then unique substring. DMs are unicast and wantAck-tracked via GET /api/messages (pending→delivered/failed); broadcasts stay pending because firmware strips want_ack.',
    example: '!b',
  })
  to?: string | number;
}

// tag description is set via DocumentBuilder.addTag in main.ts (v12 ApiTagOptions has no description)
@ApiTags('Mesh')
@Controller()
export class MeshController {
  constructor(private readonly mesh: MeshService) {}

  @Get('status')
  @ApiOperation({
    summary: 'Bridge connection status',
    description:
      'Whether the bot is connected to the meshtastic-serial-bridge and which node number this device has.',
  })
  @ApiResponse({
    status: 200,
    description: 'Connection status',
    example: {
      connected: true,
      myNodeNum: 123456789,
      host: '192.168.1.4',
      port: 4403,
    },
  })
  status() {
    return this.mesh.status();
  }

  @Post('send')
  @ApiOperation({
    summary: 'Send a text message over the mesh',
    description:
      'Queues a TEXT_MESSAGE_APP packet to the resolved target (node number, node name, or broadcast). DMs are unicast and wantAck-tracked via GET /api/messages; broadcasts stay pending because firmware strips want_ack. All sends ride the pinned test channel (index 3, "test" — never the primary channel) regardless of DM or broadcast, since modern firmware PKI handles unicast encryption/channel anyway. Returns the Meshtastic packet id.',
  })
  @ApiResponse({
    status: 200,
    description: 'Packet queued',
    example: { id: 123456789 },
  })
  @ApiResponse({ status: 400, description: 'Invalid text or target' })
  @ApiResponse({ status: 503, description: 'Bridge not connected' })
  async send(@Body() body: SendTextDto) {
    if (typeof body?.text !== 'string' || body.text.length === 0) {
      throw new BadRequestException('text must be a non-empty string');
    }
    let to: number;
    try {
      to = await this.mesh.resolveDest(body.to);
    } catch (err) {
      throw new BadRequestException(
        err instanceof Error ? err.message : String(err),
      );
    }
    return { id: await this.mesh.sendText(to, body.text) };
  }

  @Get('channels')
  @ApiOperation({
    summary: "The device's Meshtastic channels (keys redacted)",
    description:
      'Channel table streamed during the initial sync; empty until it completes. psk/keys are never exposed.',
  })
  @ApiResponse({
    status: 200,
    description: 'Channels sorted by index',
    example: [
      { index: 0, name: 'Default', uplinkEnabled: true, downlinkEnabled: true },
      {
        index: 3,
        name: 'test',
        uplinkEnabled: false,
        downlinkEnabled: false,
      },
    ],
  })
  channels() {
    return this.mesh.channels();
  }

  @Get('device')
  @ApiOperation({
    summary: 'Device info (metadata + config, keys redacted)',
    description:
      'This device\'s node number, firmware version and metadata, plus per-section config and module-config messages captured during the initial sync; empty until it completes. Key material is never exposed: security publicKey/privateKey/adminKey and network wifiPsk are replaced with "REDACTED". In-memory only, reset on every bridge reconnect.',
  })
  @ApiResponse({
    status: 200,
    description: 'Device info',
    example: {
      myNodeNum: 123456789,
      firmwareVersion: '2.7.0.1',
      metadata: {
        firmwareVersion: '2.7.0.1',
        deviceStateVersion: 1,
        canShutdown: true,
        hasWifi: false,
        hasBluetooth: true,
        hasEthernet: false,
        role: 3,
        positionFlags: 65,
        hwModel: 42,
        hasRemoteHardware: false,
        hasPKC: true,
        excludedModules: 0,
      },
      localConfig: {
        device: { role: 3, buttonGpio: 13 },
        security: {
          publicKey: 'REDACTED',
          privateKey: 'REDACTED',
          adminKey: 'REDACTED',
          isManaged: true,
        },
        network: { wifiEnabled: false, wifiSsid: '', wifiPsk: 'REDACTED' },
      },
      moduleConfig: {
        telemetry: { environmentUpdateInterval: 900 },
      },
    },
  })
  device(): DeviceInfo {
    return this.mesh.deviceInfo();
  }

  @Get('messages')
  @ApiOperation({
    summary: 'Message history (last 100)',
    description:
      'Inbound text messages and our sends, newest first. tx records start "pending" and move to "delivered"/"failed" when the routing ACK/NACK arrives; broadcasts stay "pending" because firmware strips want_ack before TX. History is backed by SQLite: the in-memory buffer (last 100) is seeded from the database on startup and re-upserted every second, so it survives process restarts and bridge reconnects; the database keeps the newest 1000 rows.',
  })
  @ApiResponse({
    status: 200,
    description: 'Messages newest first',
    example: [
      {
        id: 456789,
        dir: 'tx',
        to: 42,
        text: 'hello test',
        channel: 3,
        at: 1758000123456,
        status: 'delivered',
      },
      {
        id: 123456,
        dir: 'rx',
        from: 987654321,
        text: 'ping',
        channel: 2,
        at: 1758000000000,
      },
    ],
  })
  messages() {
    return this.mesh.messages();
  }

  @Post('messages')
  @ApiOperation({
    summary: 'Inject a synthetic inbound message into the history',
    description:
      'Synthetic inbox injection for external triggers: records an rx entry in the message history as if received on the mesh, so external systems can push messages to trigger communication later. NOT transmitted over RF — nothing is sent to the bridge or air. The record appears in GET /api/messages like any other rx message (dir "rx", channel 0). Returns { id } with a random uint32 packet id.',
  })
  @ApiResponse({
    status: 200,
    description: 'Record injected',
    example: { id: 123456789 },
  })
  @ApiResponse({ status: 400, description: 'Invalid text or from' })
  injectMessage(@Body() body: InjectMessageDto) {
    try {
      return this.mesh.injectMessage(body?.text, body?.from);
    } catch (err) {
      throw new BadRequestException(
        err instanceof Error ? err.message : String(err),
      );
    }
  }

  @Get('telemetry')
  @ApiOperation({
    summary: 'Telemetry history (last 100)',
    description:
      "TELEMETRY_APP packets from any node, newest first. Device metrics (uptime/battery/voltage/channel+air utilization) and environment sensor readings where nodes have them; kind is the meshtastic.Telemetry oneof case name — deviceMetrics, environmentMetrics, airQualityMetrics, powerMetrics, localStats, healthMetrics, hostMetrics or trafficManagementStats — and data carries that variant's payload (proto uint64 fields as decimal strings). In-memory only (last 100), reset on every bridge reconnect.",
  })
  @ApiResponse({
    status: 200,
    description: 'Telemetry records newest first',
    example: [
      {
        from: 987654321,
        at: 1758000123456,
        kind: 'deviceMetrics',
        data: {
          batteryLevel: 87,
          voltage: 4.1,
          channelUtilization: 12.5,
          airUtilTx: 3.2,
          uptimeSeconds: 86400,
        },
      },
      {
        from: 123456789,
        at: 1758000000000,
        kind: 'environmentMetrics',
        data: { temperature: 21.5, relativeHumidity: 48 },
      },
    ],
  })
  telemetry() {
    return this.mesh.telemetry();
  }

  @Get('nodes')
  @ApiOperation({
    summary: 'Known mesh nodes (lean summaries)',
    description:
      'Node database collected during the initial sync plus live POSITION_APP updates; reset on every bridge reconnect. Names, hwModel and batteryLevel appear only when the device reported them; snr/hopsAway/viaMqtt only when carried by the NodeInfo.',
  })
  @ApiResponse({
    status: 200,
    description: 'Nodes sorted by node number',
    example: [
      {
        num: 123456789,
        longName: 'Kamil SP8MK/P',
        shortName: 'KK',
        hwModel: 'TBEAM',
        batteryLevel: 87,
        lastHeard: 1758000000,
        position: { lat: 52.1049637, lon: 20.9833152, alt: 123 },
        snr: -2.5,
        hopsAway: 1,
        viaMqtt: true,
      },
    ],
  })
  async nodes() {
    return this.mesh.nodes();
  }

  @Get('nodes/:id')
  @ApiOperation({
    summary: 'Look up one node by number or name',
    description:
      'Exact node number first (numbers and numeric strings), then case-insensitive exact long/short name, else the unique case-insensitive substring match across names. 404 when nothing or more than one node matches.',
  })
  @ApiResponse({
    status: 200,
    description: 'The matching node',
    example: {
      num: 123456789,
      longName: 'Kamil SP8MK/P',
      shortName: 'KK',
      lastHeard: null,
    },
  })
  @ApiResponse({
    status: 404,
    description: 'No node (or more than one) matching the given id or name',
  })
  async node(@Param('id') id: string) {
    const n = await this.mesh.node(id);
    if (!n) throw new NotFoundException(`no node matching '${id}'`);
    return n;
  }
}