import { Component, computed, signal, ChangeDetectionStrategy } from '@angular/core';
import { NgOptimizedImage } from '@angular/common';
import { MatCardModule } from '@angular/material/card';
import { MatChipsModule } from '@angular/material/chips';
import { MatIconModule } from '@angular/material/icon';
import { MatButtonModule } from '@angular/material/button';
import { MatDividerModule } from '@angular/material/divider';
import { TranslatePipe } from '@ngx-translate/core';
import {UrlConstants} from '../../constants/UrlConstants';
import {AssetsConstants} from '../../constants/AssetsConstants';
import {RouterLink} from '@angular/router';
import {SharedFunctions} from '../../shared/SharedFunctions';

/** One role. Consecutive entries sharing a `company` render as a single employer block. */
interface ExperienceEntry {
  key: string;
  company: string;
  logo: string;
  highlightCount: number;
}

interface SkillGroup {
  titleKey: string;
  skillKeys: string[];
}

@Component({
  selector: 'app-about',
  imports: [
    NgOptimizedImage,
    MatCardModule,
    MatChipsModule,
    MatIconModule,
    MatButtonModule,
    MatDividerModule,
    TranslatePipe,
    RouterLink
  ],
  templateUrl: './about.component.html',
  changeDetection: ChangeDetectionStrategy.Eager,
  styleUrl: './about.component.scss'
})
export class AboutComponent {

  /** Roles older than the current decade are hidden until the reader asks for them. */
  readonly showEarlierExperience = signal(false);
  readonly showEarlierEducation = signal(false);

  readonly recentExperience: ExperienceEntry[] = [
    {
      key: 'ABOUT.XP.COMPANY9',
      company: 'colordigital',
      logo: AssetsConstants.COLORDIGITAL_LOGO,
      highlightCount: 3
    },
    {
      key: 'ABOUT.XP.COMPANY8',
      company: 'teraport',
      logo: AssetsConstants.TERAPORT_LOGO,
      highlightCount: 3
    },
    {
      key: 'ABOUT.XP.COMPANY7',
      company: 'colordigital-earlier',
      logo: AssetsConstants.COLORDIGITAL_LOGO,
      highlightCount: 3
    },
    {
      key: 'ABOUT.XP.COMPANY6',
      company: 'colordigital-earlier',
      logo: AssetsConstants.COLORDIGITAL_LOGO,
      highlightCount: 3
    },
    {
      key: 'ABOUT.XP.COMPANY5',
      company: 'assyst',
      logo: AssetsConstants.ASSYST_LOGO,
      highlightCount: 3
    },
    {
      key: 'ABOUT.XP.COMPANY4',
      company: 'assyst',
      logo: AssetsConstants.ASSYST_LOGO,
      highlightCount: 3
    },
    {
      key: 'ABOUT.XP.COMPANY3',
      company: 'assyst',
      logo: AssetsConstants.ASSYST_LOGO,
      highlightCount: 3
    }
  ];

  readonly earlierExperience: ExperienceEntry[] = [
    {
      key: 'ABOUT.XP.COMPANY2',
      company: 'th-bingen',
      logo: AssetsConstants.TH_BINGEN_LOGO,
      highlightCount: 3
    },
    {
      key: 'ABOUT.XP.COMPANY1',
      company: 'th-bingen',
      logo: AssetsConstants.TH_BINGEN_LOGO,
      highlightCount: 3
    },
    {
      key: 'ABOUT.XP.COMPANY0',
      company: 'chamaeleon',
      logo: AssetsConstants.CHAMAELEON_LOGO,
      highlightCount: 3
    }
  ];

  readonly projectKeys = [
    {
      key: 'ABOUT.PROJECT.TBP',
      externalLink: 'https://tbp.andreas-dahm.eu',
      internalLink: 'projects',
      identifier: 'to-be-played',
    },
    {
      key: 'ABOUT.PROJECT.CLAUDE_BOX',
      externalLink: '',
      internalLink: 'projects',
      identifier: 'claude-in-a-box',
    },
    {
      key: 'ABOUT.PROJECT.P2',
      externalLink: 'https://andreas-dahm.eu/',
      internalLink: 'projects',
      identifier: 'playground',
    },
    {
      key: 'ABOUT.PROJECT.P1',
      externalLink: 'https://store.steampowered.com/app/1532640/El_Mucho/',
      internalLink: 'projects',
      identifier: 'elmucho',
    },
    {
      key: 'ABOUT.PROJECT.P0',
      externalLink: 'https://itch.io/c/6628860/lobos-collection',
      internalLink: 'projects',
      identifier: 'gamejams',
    },
    {
      key: 'ABOUT.PROJECT.DIPLOMA',
      externalLink: '',
      internalLink: 'projects',
      identifier: 'diploma',
    },
    {
      key: 'ABOUT.PROJECT.TRIBBLE',
      externalLink: '',
      internalLink: 'projects',
      identifier: 'tribble-the-homeserver',
    }
  ];

  readonly recentEducationKeys = [
    'ABOUT.EDUCATION.E6',
    'ABOUT.EDUCATION.E5',
    'ABOUT.EDUCATION.E4'
  ];

  readonly earlierEducationKeys = [
    'ABOUT.EDUCATION.E3',
    'ABOUT.EDUCATION.E2',
    'ABOUT.EDUCATION.E1',
    'ABOUT.EDUCATION.E0'
  ];

  /**
   * Heading and chips travel together so the two can no longer drift apart —
   * they used to be declared in separate places and had ended up mismatched.
   */
  readonly skillGroups: SkillGroup[] = [
    {
      titleKey: 'ABOUT.SECTION.LANGUAGES',
      skillKeys: [
        'ABOUT.SKILLS.JAVA',
        'ABOUT.SKILLS.SPRING',
        'ABOUT.SKILLS.TYPESCRIPT',
        'ABOUT.SKILLS.ANGULAR',
        'ABOUT.SKILLS.CSHARP',
        'ABOUT.SKILLS.PYTHON',
        'ABOUT.SKILLS.VUE',
        'ABOUT.SKILLS.REACT'
      ]
    },
    {
      titleKey: 'ABOUT.SECTION.ARCH_CLOUD',
      skillKeys: [
        'ABOUT.SKILLS.ARCH_MICROSERVICES',
        'ABOUT.SKILLS.ARCH_CLOUD',
        'ABOUT.TOOLS.DOCKER',
        'ABOUT.TOOLS.K8S',
        'ABOUT.TOOLS.POSTGRES',
        'ABOUT.TOOLS.MONGO',
        'ABOUT.TOOLS.GITLAB',
        'ABOUT.TOOLS.JENKINS'
      ]
    },
    {
      titleKey: 'ABOUT.SECTION.SIM_ALGO',
      skillKeys: [
        'ABOUT.SKILLS.ENG_ALGO',
        'ABOUT.SKILLS.ENG_SIM',
        'ABOUT.SKILLS.ENG_GPU',
        'ABOUT.SKILLS.ENG_PERF',
        'ABOUT.SKILLS.UNITY'
      ]
    },
    {
      titleKey: 'ABOUT.SECTION.AI_ENG',
      skillKeys: [
        'ABOUT.SKILLS.AI_AGENTS',
        'ABOUT.SKILLS.AI_MCP',
        'ABOUT.SKILLS.AI_CONTEXT',
        'ABOUT.SKILLS.AI_HARNESS',
        'ABOUT.SKILLS.AI_GATES'
      ]
    }
  ];

  readonly visibleExperience = computed(() => {
    if (this.showEarlierExperience()) {
      return [...this.recentExperience, ...this.earlierExperience];
    }
    return this.recentExperience;
  });

  readonly visibleEducationKeys = computed(() => {
    if (this.showEarlierEducation()) {
      return [...this.recentEducationKeys, ...this.earlierEducationKeys];
    }
    return this.recentEducationKeys;
  });

  toggleEarlierExperience(): void {
    this.showEarlierExperience.update(shown => !shown);
  }

  toggleEarlierEducation(): void {
    this.showEarlierEducation.update(shown => !shown);
  }

  /** The employer header is drawn once per run of consecutive roles at the same company. */
  isFirstRoleAtCompany(index: number): boolean {
    if (index === 0) {
      return true;
    }
    const entries = this.visibleExperience();
    return entries[index - 1].company !== entries[index].company;
  }

  isLastRoleAtCompany(index: number): boolean {
    const entries = this.visibleExperience();
    if (index === entries.length - 1) {
      return true;
    }
    return entries[index + 1].company !== entries[index].company;
  }

  highlightKeys(entry: ExperienceEntry): string[] {
    return Array.from({ length: entry.highlightCount }, (_, i) => `${entry.key}.HIGHLIGHTS.P${i + 1}`);
  }

  protected readonly UrlConstants = UrlConstants;
  protected readonly AssetsConstants = AssetsConstants;
  protected readonly SharedFunctions = SharedFunctions;
}