package com.gcsc.guide.controller;

import io.swagger.v3.oas.annotations.tags.Tag;
import lombok.RequiredArgsConstructor;
import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.Resource;
import org.springframework.http.CacheControl;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.server.ResponseStatusException;

import java.util.concurrent.TimeUnit;

import static org.springframework.http.HttpStatus.NOT_FOUND;

@RestController
@RequestMapping("/api/wing/data")
@RequiredArgsConstructor
@Tag(name = "WING · Data", description = "WING embedded datasets (JWT required)")
public class WingDataController {

    @GetMapping(value = "/zones", produces = MediaType.APPLICATION_JSON_VALUE)
    public ResponseEntity<Resource> zones() {
        return serveJson("wing-data/zones.wgs84.geojson");
    }

    @GetMapping(value = "/legacy", produces = MediaType.APPLICATION_JSON_VALUE)
    public ResponseEntity<Resource> legacyChinesePermitted() {
        return serveJson("wing-data/chinese-permitted.v1.json");
    }

    @GetMapping(value = "/subcables/geo", produces = MediaType.APPLICATION_JSON_VALUE)
    public ResponseEntity<Resource> subcablesGeo() {
        return serveJson("wing-data/subcables/cable-geo.json");
    }

    @GetMapping(value = "/subcables/details", produces = MediaType.APPLICATION_JSON_VALUE)
    public ResponseEntity<Resource> subcablesDetails() {
        return serveJson("wing-data/subcables/cable-details.min.json");
    }

    private ResponseEntity<Resource> serveJson(String classpathLocation) {
        Resource resource = new ClassPathResource(classpathLocation);
        if (!resource.exists()) {
            throw new ResponseStatusException(NOT_FOUND, "Resource not found: " + classpathLocation);
        }
        return ResponseEntity.ok()
            // Authenticated endpoint: allow browser caching but keep it private.
            .cacheControl(CacheControl.maxAge(6, TimeUnit.HOURS).cachePrivate())
            .contentType(MediaType.APPLICATION_JSON)
            .body(resource);
    }
}