package com.goldenchart.controller;

import com.goldenchart.dto.MobileAppReleaseInfoDto;
import com.goldenchart.service.MobileAppReleaseService;
import jakarta.servlet.http.HttpServletRequest;
import lombok.RequiredArgsConstructor;
import org.springframework.core.io.Resource;
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;

@RestController
@RequestMapping("/mobile-app")
@RequiredArgsConstructor
public class MobileAppReleaseController {

    private final MobileAppReleaseService releaseService;

    @GetMapping("/info")
    public MobileAppReleaseInfoDto info(HttpServletRequest request) {
        return releaseService.getInfo(resolvePublicBaseUrl(request));
    }

    @GetMapping("/download/android")
    public ResponseEntity<Resource> downloadAndroid() {
        return releaseService.downloadAndroid();
    }

    private static String resolvePublicBaseUrl(HttpServletRequest request) {
        String forwardedProto = request.getHeader("X-Forwarded-Proto");
        String forwardedHost = request.getHeader("X-Forwarded-Host");
        if (forwardedHost != null && !forwardedHost.isBlank()) {
            String scheme = forwardedProto != null && !forwardedProto.isBlank() ? forwardedProto : "https";
            return scheme + "://" + forwardedHost.split(",")[0].trim();
        }
        String scheme = request.getScheme();
        int port = request.getServerPort();
        String host = request.getServerName();
        boolean defaultPort = ("http".equals(scheme) && port == 80) || ("https".equals(scheme) && port == 443);
        return defaultPort ? scheme + "://" + host : scheme + "://" + host + ":" + port;
    }
}