import { Component, inject } from '@angular/core';
import {
  FormBuilder,
  FormGroup,
  FormControl,
  ReactiveFormsModule,
  Validators,
} from '@angular/forms';
import { ActivatedRoute, Router, RouterLink } from '@angular/router';
import { AppHeader } from '../../share/header/app-header';
import { AppSideMenu } from '../../share/side-menu/app-side-menu';
import { DankaService } from '../../services/dankaService';
import { FamilyService } from '../../services/family-service';
import { MarriageRelationService } from '../../services/marriage-relation-service';
import { Danka } from '../../models/danka';
import { Family } from '../../models/family';
import { MarriageRelation } from '../../models/marriage-relation';

@Component({
  selector: 'app-family-edit',
  imports: [AppHeader, AppSideMenu, ReactiveFormsModule],
  templateUrl: './family-edit.html',
  styleUrl: './family-edit.scss',
})
export class FamilyEdit {
  danka: Danka | undefined;
  family: Family | undefined;
  families: Family[] = [];
  dankaId: string = '';
  familyId: string | null = null;
  relationMode: string = '';
  baseFamilyId: string = '';
  marriageErrorMessages: string[] = [];
  private setHouseholderOnSave = false;

  constructor(
    private dankaService: DankaService,
    private familyService: FamilyService,
    private marriageRelationService: MarriageRelationService,
    private route: ActivatedRoute,
    private router: Router,
  ) {
    this.dankaId = this.route.snapshot.params['dankaId'];
    this.familyId = this.route.snapshot.params['familyId'];
    this.danka = this.dankaService.getDankaById(this.dankaId);
    this.families = this.familyService.getFamiliesByDankaId(this.dankaId);
    this.relationMode = this.route.snapshot.queryParamMap.get('relationMode') ?? '';
    this.baseFamilyId = this.route.snapshot.queryParamMap.get('baseFamilyId') ?? '';
    if (this.familyId) {
      this.family = this.familyService.getFamilyById(this.familyId);
      if (this.family) {
        this.familyForm.patchValue({
          furigana: this.family.furigana,
          name: this.family.name,
          relationship: this.family.relationship,
          birthDate: this.family.birthDate,
          note: this.family.note,
          fatherId: this.family.fatherId,
          motherId: this.family.motherId,
          spouseId: this.family.spouseId,
          gender: this.family.gender,
        });
        this.patchMarriageRelationFields(this.family.id);
      }
    }

    if (!this.familyId && this.relationMode === 'spouse') {
      this.familyForm.patchValue({
        spouseId: this.baseFamilyId,
        marriageStatus: 'current',
      });
    }

    if (!this.familyId && this.relationMode === 'child') {
      const baseFamily = this.familyService.getFamilyById(this.baseFamilyId);

      if (baseFamily?.gender === 'male') {
        this.familyForm.patchValue({
          fatherId: this.baseFamilyId,
        });
      }

      if (baseFamily?.gender === 'female') {
        this.familyForm.patchValue({
          motherId: this.baseFamilyId,
        });
      }
    }
  }

  familyForm = new FormGroup({
    furigana: new FormControl('', [Validators.required]),
    name: new FormControl('', [Validators.required]),
    relationship: new FormControl(''),
    birthDate: new FormControl('', Validators.required),
    note: new FormControl(''),
    fatherId: new FormControl(''),
    motherId: new FormControl(''),
    spouseId: new FormControl(''),
    marriageStatus: new FormControl<MarriageRelation['status']>('current'),
    gender: new FormControl('unknown'),
  });

  getAgeText() {
    const birthDate = this.familyForm.get('birthDate')?.value;
    if (!birthDate) {
      return '生年月日を入力すると自動計算されます';
    }
    const birth = new Date(birthDate);
    const today = new Date();
    let age = today.getFullYear() - birth.getFullYear();
    const thisYearsBirthday = new Date(today.getFullYear(), birth.getMonth(), birth.getDate());

    if (thisYearsBirthday > today) {
      age--;
    }
    return `${age}歳`;
  }

  getFamilyOptions(): Family[] {
    return this.families.filter((family) => family.id !== this.familyId);
  }

  patchMarriageRelationFields(familyId: string): void {
    const relations = this.marriageRelationService.getMarriageRelationsByFamilyId(familyId);
    const relation =
      relations.find((marriageRelation) => marriageRelation.status === 'current') ?? relations[0];

    if (!relation) {
      return;
    }

    this.familyForm.patchValue({
      spouseId: relation.person1Id === familyId ? relation.person2Id : relation.person1Id,
      marriageStatus: relation.status,
    });
  }

  findMarriageRelation(person1Id: string, person2Id: string): MarriageRelation | undefined {
    return this.marriageRelationService
      .getMarriageRelationsByFamilyId(person1Id)
      .find(
        (relation) =>
          (relation.person1Id === person1Id && relation.person2Id === person2Id) ||
          (relation.person1Id === person2Id && relation.person2Id === person1Id),
      );
  }

  saveFamily() {
    if (this.familyForm.invalid) {
      return;
    }

    this.marriageErrorMessages = [];
    const familyId = this.familyId ?? Date.now().toString();
    const dankaId = this.dankaId;
    const formValue = this.familyForm.value;
    const spouseId = formValue.spouseId ?? '';
    const marriageStatus = formValue.marriageStatus ?? 'current';
    const currentSpouseId = marriageStatus === 'current' ? spouseId : '';
    const updatedFamily = {
      id: familyId,
      dankaId: dankaId,
      furigana: formValue.furigana?.trim() ?? '',
      name: formValue.name?.trim() ?? '',
      relationship: formValue.relationship?.trim() ?? '',
      birthDate: formValue.birthDate?.trim() ?? '',
      note: formValue.note?.trim() ?? '',
      fatherId: this.familyForm.value.fatherId ?? '',
      motherId: this.familyForm.value.motherId ?? '',
      spouseId: currentSpouseId,
      gender: this.familyForm.value.gender ?? 'unknown',
    };

    if (spouseId) {
      const existingRelation = this.findMarriageRelation(familyId, spouseId);
      const errors = this.marriageRelationService.saveMarriageRelation({
        id: existingRelation?.id ?? Date.now().toString(),
        dankaId,
        person1Id: familyId,
        person2Id: spouseId,
        status: marriageStatus,
        startDate: existingRelation?.startDate ?? '',
        endDate: existingRelation?.endDate ?? '',
        note: existingRelation?.note ?? '',
      });

      if (errors.length > 0) {
        this.marriageErrorMessages = errors;
        return;
      }
    } else {
      const currentMarriage = this.marriageRelationService.getCurrentMarriageByFamilyId(familyId);
      if (currentMarriage) {
        this.marriageRelationService.deleteMarriageRelation(currentMarriage.id);
      }
    }

    this.familyService.saveFamily(updatedFamily);
    this.saveHouseholderIfSelected(updatedFamily);
    this.router.navigate(['/danka-detail', dankaId], { queryParams: { tab: 'family' } });
  }

  cancelFamilyEdit(): void {
    const dankaId = this.dankaId;
    this.router.navigate(['/danka-detail', dankaId], { queryParams: { tab: 'family' } });
  }

  deleteFamily() {
    const dankaId = this.dankaId;
    if (!this.familyId) {
      return;
    }
    this.familyService.deleteFamily(this.familyId);
    this.router.navigate(['/danka-detail', dankaId], { queryParams: { tab: 'family' } });
  }

  setAsHouseholder(): void {
    this.setHouseholderOnSave = true;
    this.familyForm.patchValue({
      relationship: '施主',
    });
  }

  private saveHouseholderIfSelected(family: Family): void {
    if (!this.setHouseholderOnSave || !this.danka) {
      return;
    }

    this.dankaService.saveDanka({
      ...this.danka,
      householder: family.name,
      householderFurigana: family.furigana,
      updatedAt: this.formatDateForSave(new Date()),
    });
  }

  private formatDateForSave(date: Date): string {
    const year = date.getFullYear();
    const month = String(date.getMonth() + 1).padStart(2, '0');
    const day = String(date.getDate()).padStart(2, '0');
    return `${year}-${month}-${day}`;
  }
}