package stirling.software.SPDF.controller.web;

import com.fasterxml.jackson.core.type.TypeReference;
import com.fasterxml.jackson.databind.ObjectMapper;
import io.swagger.v3.oas.annotations.Hidden;
import io.swagger.v3.oas.annotations.tags.Tag;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.core.io.Resource;
import org.springframework.core.io.ResourceLoader;
import org.springframework.core.io.support.ResourcePatternUtils;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;

import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.*;
import java.util.stream.Collectors;
import java.util.stream.Stream;

@Controller
@Tag(name = "General", description = "General APIs")
public class GeneralWebController {
	

	
	
	@GetMapping("/pipeline")
	@Hidden
	public String pipelineForm(Model model) {
	    model.addAttribute("currentPage", "pipeline");

	    List<String> pipelineConfigs = new ArrayList<>();
	    try (Stream<Path> paths = Files.walk(Paths.get("./pipeline/defaultWebUIConfigs/"))) {
	        List<Path> jsonFiles = paths
	            .filter(Files::isRegularFile)
	            .filter(p -> p.toString().endsWith(".json"))
	            .collect(Collectors.toList());

	        for (Path jsonFile : jsonFiles) {
	            String content = Files.readString(jsonFile, StandardCharsets.UTF_8);
	            pipelineConfigs.add(content);
	        }
	        List<Map<String, String>> pipelineConfigsWithNames = new ArrayList<>();
	        for (String config : pipelineConfigs) {
	        	Map<String, Object> jsonContent = new ObjectMapper().readValue(config, new TypeReference<Map<String, Object>>(){});

	            String name = (String) jsonContent.get("name");
	            Map<String, String> configWithName = new HashMap<>();
	            configWithName.put("json", config);
	            configWithName.put("name", name);
	            pipelineConfigsWithNames.add(configWithName);
	        }
	        model.addAttribute("pipelineConfigsWithNames", pipelineConfigsWithNames);

	    } catch (IOException e) {
	        e.printStackTrace();
	    }

	    model.addAttribute("pipelineConfigs", pipelineConfigs);

	    return "pipeline";
	}

	 
	 
	 
    @GetMapping("/merge-pdfs")
    @Hidden
    public String mergePdfForm(Model model) {
        model.addAttribute("currentPage", "merge-pdfs");
        return "merge-pdfs";
    }

    @GetMapping("/view-pdf")
    @Hidden
    public String ViewPdfForm2(Model model) {
        model.addAttribute("currentPage", "view-pdf");
        return "view-pdf";
    }
    
    @GetMapping("/multi-tool")
    @Hidden
    public String multiToolForm(Model model) {
        model.addAttribute("currentPage", "multi-tool");
        return "multi-tool";
    }
   
    
    @GetMapping("/remove-pages")
    @Hidden
    public String pageDeleter(Model model) {
        model.addAttribute("currentPage", "remove-pages");
        return "remove-pages";
    }
    
    @GetMapping("/pdf-organizer")
    @Hidden
    public String pageOrganizer(Model model) {
        model.addAttribute("currentPage", "pdf-organizer");
        return "pdf-organizer";
    }
    
    @GetMapping("/extract-page")
    @Hidden
    public String extractPages(Model model) {
        model.addAttribute("currentPage", "extract-page");
        return "extract-page";
    }
    
    @GetMapping("/pdf-to-single-page")
    @Hidden
    public String pdfToSinglePage(Model model) {
        model.addAttribute("currentPage", "pdf-to-single-page");
        return "pdf-to-single-page";
    }
    
    @GetMapping("/rotate-pdf")
    @Hidden
    public String rotatePdfForm(Model model) {
        model.addAttribute("currentPage", "rotate-pdf");
        return "rotate-pdf";
    }
    
    @GetMapping("/split-pdfs")
    @Hidden
    public String splitPdfForm(Model model) {
        model.addAttribute("currentPage", "split-pdfs");
        return "split-pdfs";
    }
    
    @GetMapping("/sign")
    @Hidden
    public String signForm(Model model) {
        model.addAttribute("currentPage", "sign");
        model.addAttribute("fonts", getFontNames());
        return "sign";
    }
    
    @GetMapping("/multi-page-layout")
    @Hidden
    public String multiPageLayoutForm(Model model) {
        model.addAttribute("currentPage", "multi-page-layout");
        return "multi-page-layout";
    }
    
    
    @GetMapping("/scale-pages")
    @Hidden
    public String scalePagesFrom(Model model) {
        model.addAttribute("currentPage", "scale-pages");
        return "scale-pages";
    }
    
    
    
    @Autowired
    private ResourceLoader resourceLoader;
    
    private List<FontResource> getFontNames() {
        List<FontResource> fontNames = new ArrayList<>();

        // Extract font names from classpath
        fontNames.addAll(getFontNamesFromLocation("classpath:static/fonts/*.woff2"));

        // Extract font names from external directory
        fontNames.addAll(getFontNamesFromLocation("file:customFiles/static/fonts/*"));

        return fontNames;
    }

    private List<FontResource> getFontNamesFromLocation(String locationPattern) {
        try {
            Resource[] resources = ResourcePatternUtils.getResourcePatternResolver(resourceLoader)
                    .getResources(locationPattern);
            return Arrays.stream(resources)
                    .map(resource -> {
                        try {
                            String filename = resource.getFilename();
                            if (filename != null) {
                                int lastDotIndex = filename.lastIndexOf('.');
                                if (lastDotIndex != -1) {
                                    String name = filename.substring(0, lastDotIndex);
                                    String extension = filename.substring(lastDotIndex + 1);
                                    return new FontResource(name, extension);
                                }
                            }
                            return null;
                        } catch (Exception e) {
                            throw new RuntimeException("Error processing filename", e);
                        }
                    })
                    .filter(Objects::nonNull)
                    .collect(Collectors.toList());
        } catch (Exception e) {
            throw new RuntimeException("Failed to read font directory from " + locationPattern, e);
        }
    }


    public String getFormatFromExtension(String extension) {
        switch (extension) {
            case "ttf": return "truetype";
            case "woff": return "woff";
            case "woff2": return "woff2";
            case "eot": return "embedded-opentype";
            case "svg": return "svg";
            default: return ""; // or throw an exception if an unexpected extension is encountered
        }
    }

    
    public class FontResource {
        private String name;
        private String extension;
        private String type;
        public FontResource(String name, String extension) {
            this.name = name;
            this.extension = extension;
            this.type = getFormatFromExtension(extension);
        }

		public String getName() {
			return name;
		}

		public void setName(String name) {
			this.name = name;
		}

		public String getExtension() {
			return extension;
		}

		public void setExtension(String extension) {
			this.extension = extension;
		}

		public String getType() {
			return type;
		}

		public void setType(String type) {
			this.type = type;
		}
        
        
    }


    @GetMapping("/crop")
    @Hidden
    public String cropForm(Model model) {
        model.addAttribute("currentPage", "crop");
        return "crop";
    }
    

    @GetMapping("/auto-split-pdf")
    @Hidden
    public String autoSPlitPDFForm(Model model) {
        model.addAttribute("currentPage", "auto-split-pdf");
        return "auto-split-pdf";
    }
}
