package ru.ulstu.fc.rule.controller;

import jakarta.validation.Valid;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import ru.ulstu.fc.rule.model.FuzzyRuleForm;
import ru.ulstu.fc.rule.model.FuzzyTerm;
import ru.ulstu.fc.rule.model.Variable;
import ru.ulstu.fc.rule.service.FuzzyRuleService;
import ru.ulstu.fc.rule.service.FuzzyTermService;
import ru.ulstu.fc.rule.service.VariableService;

import java.util.List;

@Controller
@RequestMapping("rule")
public class FuzzyRuleController {
    private final FuzzyRuleService fuzzyRuleService;
    private final VariableService variableService;
    private final FuzzyTermService fuzzyTermService;

    public FuzzyRuleController(FuzzyRuleService fuzzyRuleService,
                               VariableService variableService,
                               FuzzyTermService fuzzyTermService) {
        this.fuzzyRuleService = fuzzyRuleService;
        this.variableService = variableService;
        this.fuzzyTermService = fuzzyTermService;
    }

    @GetMapping("/edit/{projectId}/{ruleId}")
    public String edit(@PathVariable(value = "projectId") Integer projectId,
                       @PathVariable(value = "ruleId") Integer id, Model model) {
        model.addAttribute("projectId", projectId);
        model.addAttribute("fuzzyRuleForm",
                (id != null && id != 0)
                        ? new FuzzyRuleForm(id, fuzzyRuleService.getById(id))
                        : new FuzzyRuleForm(id, projectId));
        return "rule/edit";
    }

    @PostMapping(value = "save", params = "save")
    public String save(@Valid FuzzyRuleForm fuzzyRuleForm, BindingResult bindingResult, Model model) {
        if (bindingResult.hasErrors()) {
            model.addAttribute("projectId", fuzzyRuleForm.getProjectId());
            return "rule/edit";
        }
        fuzzyRuleService.save(fuzzyRuleForm);
        return "redirect:/project/edit/" + fuzzyRuleForm.getProjectId();
    }

    @PostMapping(value = "save", params = "delete")
    public String delete(FuzzyRuleForm fuzzyRuleForm) {
        if (fuzzyRuleForm != null && fuzzyRuleForm.getId() != null) {
            fuzzyRuleService.delete(fuzzyRuleForm);
        }
        return "redirect:/project/edit/" + fuzzyRuleForm.getProjectId();
    }

    @ResponseBody
    @GetMapping("/getVariables/{projectId}")
    public List<Variable> getVariables(@PathVariable("projectId") Integer projectId) {
        //TODO: return DTO without terms
        return variableService.getAllByProject(projectId);
    }

    @ResponseBody
    @GetMapping("/getFuzzyTerms/{variableId}")
    public List<FuzzyTerm> getTerms(@PathVariable("variableId") Integer variableId) {
        return fuzzyTermService.getByVariableId(variableId);
    }
}