import { Body, Controller, Post, Get, Query } from '@nestjs/common';
import { ApiTags, ApiOperation, ApiResponse, ApiQuery } from '@nestjs/swagger';
import { IsPublic } from '@tria-plc/api-common/modules/auth/decorators/public.decorator';
import { SearchService } from './search.service';
import { SearchTripsDto, FareQuoteDto, FareBreakdownRequestDto } from './search.dto';

@ApiTags('Search')
@Controller('search')
@IsPublic()
export class SearchController {
  constructor(private service: SearchService) {}

  @Post()
  @ApiOperation({
    summary: 'Search trips by origin, destination, date, passengers, and nationality',
    description: `Finds all train schedules matching search criteria with real-time seat availability and coach type options.

**Coach Type Selection Flow:**
- Users browse available coach types (Economy, VIP, etc.)
- Each coach type displays available seat classes and base fares
- Users select a coach type to proceed to seat selection
- At seat selection, users choose specific seat and class (actual price confirmed here)
- Final fare may adjust based on seat position/amenities selected

**Features:**
- Any origin→destination stop pair (not just terminals)
- Age-based passenger counts (adults ≥5 years, children <5 years)
- Nationality filtering (Ethiopian, Djiboutian, Other)
- Real-time seat availability per class
- Multi-currency fare display
- Segment-based availability (seat booked A→B still available B→D)`
  })
  @ApiResponse({ status: 200, description: 'Matching schedules with coachTypes array showing available coach types with seat classes and base fares' })
  searchTrips(@Body() dto: SearchTripsDto) {
    return this.service.searchTrips(dto);
  }

  @Post('fare-quote')
  @ApiOperation({
    summary: 'Get fare quote with age-based pricing and multi-currency support',
    description: `Calculates detailed fare breakdown for a specific schedule leg.

Age-Based Pricing:
- ADULT (≥5 years): 100% of base fare
- CHILD (<5 years): First child FREE, subsequent children 100%
- Example: 2 adults + 3 children = 4× base fare

Pricing Rules (priority order):
1. Schedule-scoped FareRule (tripId = scheduleId)
2. Segment route FareRule (e.g. ADD-DRE)
3. Full-route FareRule (e.g. ADD-DJI)
4. Default hardcoded fare

Multi-Currency:
- Transaction currency: ETB
- Display currencies: ETB, DJF, USD
- Real-time exchange rate conversion

Nationality-Based:
- Ethiopian: National ID verification required
- Djiboutian: Passport details, Waafi payment available
- Other: Passport details, international payments`
  })
  @ApiResponse({ status: 200, description: 'Fare breakdown with adult/child pricing, discounts, taxes, and currency conversion' })
  @ApiResponse({ status: 404, description: 'Schedule not found or origin/destination not on schedule' })
  getFareQuote(@Body() dto: FareQuoteDto) {
    return this.service.getFareQuote(dto);
  }

  @Get('fare-breakdown')
  @ApiOperation({
    summary: 'Per-passenger fare breakdown for booking review page',
    description: `Calculates a line-item fare for each individual passenger based on their date of birth, nationality, and chosen seat class.

- Age is derived from dateOfBirth at request time (ADULT ≥5 yrs, CHILD <5 yrs)
- First CHILD in the list travels free (pays only premium + insurance fees)
- Each passenger can have a different seat class and nationality
- Returns per-passenger lines plus subtotal, discount, and grand total

**passengers** must be a URL-encoded JSON array, e.g.:
\`[{"passengerName":"Abebe","dateOfBirth":"1985-03-15","seatClassId":"uuid","nationality":"Ethiopian"}]\``,
  })
  @ApiQuery({ name: 'scheduleId', description: 'TrainSchedule UUID' })
  @ApiQuery({ name: 'originStationId', description: 'Origin station UUID' })
  @ApiQuery({ name: 'destinationStationId', description: 'Destination station UUID' })
  @ApiQuery({ name: 'passengers', description: 'URL-encoded JSON array of passengers: [{passengerName, dateOfBirth, seatClassId, nationality?}]' })
  @ApiQuery({ name: 'promoCode', required: false })
  @ApiQuery({ name: 'displayCurrency', required: false, enum: ['ETB', 'DJF', 'USD'] })
  @ApiResponse({ status: 200, description: 'Per-passenger fare lines with grand total' })
  @ApiResponse({ status: 404, description: 'Schedule not found' })
  getFareBreakdown(@Query() dto: FareBreakdownRequestDto) {
    return this.service.getFareBreakdown(dto);
  }
}