/**
 * PortfolioPage — real My Portfolio CRUD, wired to backend.
 * Uses existing /api/:rolePrefix/portfolio/me endpoints for professionals.
 * Job seekers get a dedicated portfolio editor (education/work experience/skills).
 */
import { For, Show, createSignal, onMount } from 'solid-js';
import { CARD, BTN_ORANGE, BTN_GHOST, BTN_PRIMARY, INPUT, LABEL } from '~/components/DashboardShell';
import { readJobSeekerProfile, updateJobSeekerCustomData } from '~/lib/job-seeker-custom-data';

const API = '/api/gateway';

// ── Role prefix map ───────────────────────────────────────────────────────────

const ROLE_PREFIX: Record<string, string> = {
  PHOTOGRAPHER:        'photographers',
  MAKEUP_ARTIST:       'makeup-artists',
  TUTOR:               'tutors',
  DEVELOPER:           'developers',
  VIDEO_EDITOR:        'video-editors',
  GRAPHIC_DESIGNER:    'graphic-designers',
  SOCIAL_MEDIA_MANAGER:'social-media-managers',
  FITNESS_TRAINER:     'fitness-trainers',
  CATERING_SERVICES:   'catering-services',
  UGC_CONTENT_CREATOR: 'ugc-content-creators',
};

// ── Types ─────────────────────────────────────────────────────────────────────

interface PortfolioItem {
  id: string;
  title: string;
  description?: string;
  tags?: string[];
  created_at?: string;
}

interface FormState {
  title: string;
  description: string;
  tags: string;
}

interface JobSeekerPortfolioState {
  headline: string;
  summary: string;
  education: string;
  workExperience: string;
  skills: string;
}

const EMPTY_FORM: FormState = { title: '', description: '', tags: '' };
const EMPTY_JOB_SEEKER_FORM: JobSeekerPortfolioState = {
  headline: '',
  summary: '',
  education: '',
  workExperience: '',
  skills: '',
};
const JOB_SEEKER_FALLBACK_TABS = ['About', 'Education', 'Work Experience', 'Skills'];

// ── Helpers ───────────────────────────────────────────────────────────────────

async function apiFetch(path: string, opts?: RequestInit) {
  return fetch(`${API}${path}`, {
    ...opts,
    credentials: 'include',
    headers: { 'Content-Type': 'application/json', ...(opts?.headers ?? {}) },
  });
}

// ── Component ─────────────────────────────────────────────────────────────────

interface Props {
  roleKey: string;
  runtimeTabs?: string[];
  runtimeFields?: string[];
}

export default function PortfolioPage(props: Props) {
  const prefix = () => ROLE_PREFIX[props.roleKey] ?? '';
  const isProfessional = () => Boolean(prefix());
  const isJobSeeker = () => String(props.roleKey || '').toUpperCase() === 'JOB_SEEKER';

  const [items, setItems] = createSignal<PortfolioItem[]>([]);
  const [loading, setLoading] = createSignal(true);
  const [showForm, setShowForm] = createSignal(false);
  const [editId, setEditId] = createSignal<string | null>(null);
  const [form, setForm] = createSignal<FormState>({ ...EMPTY_FORM });
  const [saving, setSaving] = createSignal(false);
  const [deleting, setDeleting] = createSignal<string | null>(null);
  const [error, setError] = createSignal('');
  const [jobSeekerForm, setJobSeekerForm] = createSignal<JobSeekerPortfolioState>({ ...EMPTY_JOB_SEEKER_FORM });
  const [jobSeekerSavedAt, setJobSeekerSavedAt] = createSignal('');
  const [jobSeekerTab, setJobSeekerTab] = createSignal('About');
  const [jobSeekerSaving, setJobSeekerSaving] = createSignal(false);
  const [jobSeekerMsg, setJobSeekerMsg] = createSignal('');
  const [jobSeekerErr, setJobSeekerErr] = createSignal('');

  const loadItems = async () => {
    if (!isProfessional()) { setLoading(false); return; }
    setLoading(true);
    try {
      const res = await apiFetch(`/api/${prefix()}/portfolio/me`);
      if (res.ok) {
        const data = await res.json();
        setItems(Array.isArray(data) ? data : (data.items ?? []));
      }
    } finally {
      setLoading(false);
    }
  };

  const loadJobSeekerPortfolio = () => {
    readJobSeekerProfile()
      .then((profile) => {
      const parsed = profile?.custom_data?.job_seeker_portfolio as Record<string, unknown> | undefined;
      if (!parsed || typeof parsed !== 'object') return;
      setJobSeekerForm({
        headline: String(parsed?.headline || ''),
        summary: String(parsed?.summary || ''),
        education: String(parsed?.education || ''),
        workExperience: String(parsed?.workExperience || ''),
        skills: String(parsed?.skills || ''),
      });
      setJobSeekerSavedAt(String(parsed?.savedAt || ''));
      })
      .catch(() => {
        // ignore non-blocking load errors
      });
  };

  const saveJobSeekerPortfolio = () => {
    setJobSeekerSaving(true);
    setJobSeekerMsg('');
    setJobSeekerErr('');
    const savedAt = new Date().toISOString();
    const payload = { ...jobSeekerForm(), savedAt };
    updateJobSeekerCustomData((current) => ({ ...current, job_seeker_portfolio: payload }))
      .then(() => {
        setJobSeekerSavedAt(savedAt);
        setJobSeekerMsg('Portfolio saved successfully.');
      })
      .catch((e: any) => {
        setJobSeekerErr(e?.message || 'Failed to save portfolio.');
      })
      .finally(() => {
        setJobSeekerSaving(false);
      });
  };

  const normalizeToken = (value: string) => String(value || '').trim().toLowerCase().replace(/[_-]+/g, ' ');
  const toLabel = (value: string) =>
    String(value || '')
      .trim()
      .replace(/[_-]+/g, ' ')
      .replace(/\b\w/g, (c) => c.toUpperCase());

  const runtimePortfolioTabs = () => {
    const raw = Array.isArray(props.runtimeTabs) ? props.runtimeTabs : [];
    const allowed = new Set(['about', 'education', 'work experience', 'skills']);
    const mapped = raw
      .map((tab) => toLabel(tab))
      .filter(Boolean)
      .map((tab) => {
        const t = normalizeToken(tab);
        if (t.includes('education')) return 'Education';
        if (t.includes('work') || t.includes('experience')) return 'Work Experience';
        if (t.includes('skill')) return 'Skills';
        if (t.includes('about') || t.includes('overview') || t.includes('profile')) return 'About';
        return '';
      })
      .filter((tab) => Boolean(tab) && allowed.has(normalizeToken(tab)));
    const unique = Array.from(new Set(mapped));
    return unique.length ? unique : JOB_SEEKER_FALLBACK_TABS;
  };

  const runtimeFieldsByTab = () => {
    const fromRuntime = Array.isArray(props.runtimeFields) ? props.runtimeFields.map((f) => toLabel(String(f || ''))).filter(Boolean) : [];
    const grouped: Record<string, string[]> = {
      About: [],
      Education: [],
      'Work Experience': [],
      Skills: [],
    };
    for (const field of fromRuntime) {
      const key = normalizeToken(field);
      if (key.includes('education') || key.includes('college') || key.includes('degree')) grouped.Education.push(field);
      else if (key.includes('work') || key.includes('experience') || key.includes('employment')) grouped['Work Experience'].push(field);
      else if (key.includes('skill') || key.includes('tool') || key.includes('technology')) grouped.Skills.push(field);
      else grouped.About.push(field);
    }
    if (!grouped.About.length) grouped.About = ['Professional Headline', 'Career Summary'];
    if (!grouped.Education.length) grouped.Education = ['Education'];
    if (!grouped['Work Experience'].length) grouped['Work Experience'] = ['Work Experience'];
    if (!grouped.Skills.length) grouped.Skills = ['Skills'];
    return grouped;
  };

  onMount(() => {
    if (isJobSeeker()) {
      loadJobSeekerPortfolio();
      const tabs = runtimePortfolioTabs();
      setJobSeekerTab(tabs[0] || 'About');
      setLoading(false);
      return;
    }
    void loadItems();
  });

  const openCreate = () => {
    setEditId(null);
    setForm({ ...EMPTY_FORM });
    setError('');
    setShowForm(true);
  };

  const openEdit = (item: PortfolioItem) => {
    setEditId(item.id);
    setForm({
      title: item.title,
      description: item.description ?? '',
      tags: (item.tags ?? []).join(', '),
    });
    setError('');
    setShowForm(true);
  };

  const cancelForm = () => {
    setShowForm(false);
    setEditId(null);
    setForm({ ...EMPTY_FORM });
    setError('');
  };

  const setField = (key: keyof FormState, val: string) =>
    setForm((prev) => ({ ...prev, [key]: val }));

  const handleSave = async () => {
    if (!form().title.trim()) { setError('Title is required.'); return; }
    setSaving(true);
    setError('');
    const payload = {
      title: form().title.trim(),
      description: form().description.trim() || undefined,
      tags: form().tags
        .split(',')
        .map((t) => t.trim())
        .filter(Boolean),
    };
    try {
      const id = editId();
      const res = id
        ? await apiFetch(`/api/${prefix()}/portfolio/me/${id}`, { method: 'PATCH', body: JSON.stringify(payload) })
        : await apiFetch(`/api/${prefix()}/portfolio/me`, { method: 'POST', body: JSON.stringify(payload) });

      if (res.ok) {
        await loadItems();
        cancelForm();
      } else {
        const d = await res.json().catch(() => ({}));
        setError(d.error ?? d.message ?? 'Failed to save. Please try again.');
      }
    } catch {
      setError('Network error. Please try again.');
    } finally {
      setSaving(false);
    }
  };

  const handleDelete = async (id: string) => {
    if (!confirm('Delete this portfolio item?')) return;
    setDeleting(id);
    try {
      await apiFetch(`/api/${prefix()}/portfolio/me/${id}`, { method: 'DELETE' });
      await loadItems();
    } finally {
      setDeleting(null);
    }
  };

  // ── Job seeker portfolio editor ─────────────────────────────────────────
  if (isJobSeeker()) {
    const setField = (fieldKey: string, value: string) => {
      const key = normalizeToken(fieldKey);
      setJobSeekerForm((prev) => {
        if (key.includes('headline')) return { ...prev, headline: value };
        if (key.includes('summary') || key.includes('about')) return { ...prev, summary: value };
        if (key.includes('education') || key.includes('degree') || key.includes('college')) return { ...prev, education: value };
        if (key.includes('work') || key.includes('experience') || key.includes('employment')) return { ...prev, workExperience: value };
        if (key.includes('skill') || key.includes('tool') || key.includes('technology')) return { ...prev, skills: value };
        return { ...prev, summary: value };
      });
    };
    const readField = (fieldKey: string) => {
      const key = normalizeToken(fieldKey);
      if (key.includes('headline')) return jobSeekerForm().headline;
      if (key.includes('summary') || key.includes('about')) return jobSeekerForm().summary;
      if (key.includes('education') || key.includes('degree') || key.includes('college')) return jobSeekerForm().education;
      if (key.includes('work') || key.includes('experience') || key.includes('employment')) return jobSeekerForm().workExperience;
      if (key.includes('skill') || key.includes('tool') || key.includes('technology')) return jobSeekerForm().skills;
      return '';
    };
    const tabs = runtimePortfolioTabs();
    const fieldsByTab = runtimeFieldsByTab();
    const activeTab = () => tabs.includes(jobSeekerTab()) ? jobSeekerTab() : (tabs[0] || 'About');
    const activeFields = () => fieldsByTab[activeTab()] || [];
    const isLongField = (field: string) => {
      const key = normalizeToken(field);
      return key.includes('summary')
        || key.includes('about')
        || key.includes('experience')
        || key.includes('education')
        || key.includes('skills');
    };

    return (
      <div style={{ 'max-width': '900px' }}>
        <div style={{ ...CARD, 'margin-bottom': '14px', padding: '0 16px' }}>
          <div style={{ display: 'flex', gap: '20px', 'border-bottom': '1px solid #E5E7EB', padding: '12px 0 0' }}>
            <For each={tabs}>
              {(tab) => (
                <button
                  type="button"
                  onClick={() => setJobSeekerTab(tab)}
                  style={{
                    padding: '0 0 10px',
                    border: 'none',
                    background: 'none',
                    cursor: 'pointer',
                    'font-size': '13px',
                    'font-weight': jobSeekerTab() === tab ? '700' : '500',
                    color: jobSeekerTab() === tab ? '#FF5E13' : '#6B7280',
                    'border-bottom': jobSeekerTab() === tab ? '2px solid #FF5E13' : '2px solid transparent',
                    'margin-bottom': '-1px',
                  }}
                >
                  {tab}
                </button>
              )}
            </For>
          </div>
          <div style={{ padding: '14px 0' }}>
          <p style={{ margin: '0', 'font-size': '22px', 'font-weight': '800', color: '#0D0D2A' }}>My Portfolio</p>
          <p style={{ margin: '6px 0 0', 'font-size': '13px', color: '#6B7280' }}>
            Runtime-config driven form using configured tabs and fields.
          </p>
          <Show when={jobSeekerSavedAt()}>
            <p style={{ margin: '8px 0 0', 'font-size': '12px', color: '#059669', 'font-weight': '600' }}>
              Saved to profile at {new Date(jobSeekerSavedAt()).toLocaleString()}.
            </p>
          </Show>
          </div>
        </div>

        <div style={{ ...CARD, display: 'grid', gap: '12px' }}>
          <Show when={jobSeekerMsg()}>
            <div style={{ border: '1px solid #BBF7D0', background: '#ECFDF5', color: '#065F46', 'border-radius': '10px', padding: '10px 12px', 'font-size': '12px', 'font-weight': '600' }}>
              {jobSeekerMsg()}
            </div>
          </Show>
          <Show when={jobSeekerErr()}>
            <div style={{ border: '1px solid #FECACA', background: '#FEF2F2', color: '#B91C1C', 'border-radius': '10px', padding: '10px 12px', 'font-size': '12px', 'font-weight': '600' }}>
              {jobSeekerErr()}
            </div>
          </Show>
          <p style={{ margin: '0', 'font-size': '14px', 'font-weight': '700', color: '#111827' }}>{activeTab()}</p>
          <div style={{ display: 'grid', 'grid-template-columns': '1fr 1fr', gap: '12px' }}>
            <For each={activeFields()}>
              {(field) => (
                <div style={{ 'grid-column': isLongField(field) ? '1 / -1' : 'auto' }}>
                  <label style={LABEL}>{field}</label>
                  <Show
                    when={!isLongField(field)}
                    fallback={
                      <textarea
                        rows={4}
                        value={readField(field)}
                        onInput={(e) => setField(field, e.currentTarget.value)}
                        placeholder={`Enter ${field.toLowerCase()}`}
                        style={{ ...INPUT, height: 'auto', padding: '10px 12px', resize: 'vertical' }}
                      />
                    }
                  >
                    <input
                      type="text"
                      value={readField(field)}
                      onInput={(e) => setField(field, e.currentTarget.value)}
                      placeholder={`Enter ${field.toLowerCase()}`}
                      style={INPUT}
                    />
                  </Show>
                </div>
              )}
            </For>
          </div>

          <div style={{ display: 'flex', gap: '10px', 'justify-content': 'flex-end' }}>
            <button type="button" onClick={() => setJobSeekerForm({ ...EMPTY_JOB_SEEKER_FORM })} style={BTN_GHOST}>
              Clear
            </button>
            <button type="button" onClick={saveJobSeekerPortfolio} disabled={jobSeekerSaving()} style={{ ...BTN_ORANGE, opacity: jobSeekerSaving() ? '0.7' : '1' }}>
              {jobSeekerSaving() ? 'Saving...' : 'Save Portfolio'}
            </button>
          </div>
        </div>
      </div>
    );
  }

  // ── Not a professional role ─────────────────────────────────────────────
  if (!isProfessional()) {
    return (
      <div style={{ ...CARD, 'text-align': 'center', padding: '40px' }}>
        <p style={{ margin: '0', 'font-size': '15px', color: '#9CA3AF' }}>
          Portfolio is available for professional roles only.
        </p>
      </div>
    );
  }

  return (
    <div style={{ 'max-width': '800px' }}>

      {/* ── Header ────────────────────────────────────────────────────── */}
      <div style={{ display: 'flex', 'align-items': 'center', 'justify-content': 'space-between', 'margin-bottom': '16px' }}>
        <div>
          <p style={{ margin: '0', 'font-size': '22px', 'font-weight': '800', color: '#0D0D2A' }}>My Portfolio</p>
          <p style={{ margin: '4px 0 0', 'font-size': '13px', color: '#6B7280' }}>
            Showcase your work to attract clients.
          </p>
        </div>
        <button type="button" onClick={openCreate} style={BTN_ORANGE}>
          + Add Item
        </button>
      </div>

      {/* ── Create / Edit form ─────────────────────────────────────────── */}
      <Show when={showForm()}>
        <div style={{ ...CARD, 'margin-bottom': '16px', border: '1px solid #FF5E13' }}>
          <p style={{ margin: '0 0 16px', 'font-size': '16px', 'font-weight': '800', color: '#0D0D2A' }}>
            {editId() ? 'Edit Portfolio Item' : 'New Portfolio Item'}
          </p>

          <div style={{ display: 'grid', 'grid-template-columns': '1fr 1fr', gap: '14px' }}>
            <div style={{ 'grid-column': 'span 2' }}>
              <label style={LABEL}>Title <span style={{ color: '#EF4444' }}>*</span></label>
              <input
                type="text"
                placeholder="e.g. Wedding shoot at Udaipur"
                value={form().title}
                onInput={(e) => setField('title', e.currentTarget.value)}
                style={INPUT}
              />
            </div>
            <div style={{ 'grid-column': 'span 2' }}>
              <label style={LABEL}>Description</label>
              <textarea
                rows={3}
                placeholder="Brief description of the work…"
                value={form().description}
                onInput={(e) => setField('description', e.currentTarget.value)}
                style={{ ...INPUT, height: 'auto', padding: '10px 12px', resize: 'vertical' }}
              />
            </div>
            <div style={{ 'grid-column': 'span 2' }}>
              <label style={LABEL}>Tags (comma separated)</label>
              <input
                type="text"
                placeholder="e.g. wedding, outdoor, portrait"
                value={form().tags}
                onInput={(e) => setField('tags', e.currentTarget.value)}
                style={INPUT}
              />
            </div>
          </div>

          <Show when={error()}>
            <p style={{ margin: '12px 0 0', 'font-size': '13px', color: '#EF4444', 'font-weight': '600' }}>
              {error()}
            </p>
          </Show>

          <div style={{ display: 'flex', gap: '10px', 'margin-top': '16px' }}>
            <button
              type="button"
              onClick={handleSave}
              disabled={saving()}
              style={{ ...BTN_PRIMARY, opacity: saving() ? '0.6' : '1' }}
            >
              {saving() ? 'Saving…' : editId() ? 'Update Item' : 'Add Item'}
            </button>
            <button type="button" onClick={cancelForm} style={BTN_GHOST}>
              Cancel
            </button>
          </div>
        </div>
      </Show>

      {/* ── Loading ─────────────────────────────────────────────────────── */}
      <Show when={loading()}>
        <div style={{ ...CARD, 'text-align': 'center', padding: '32px', color: '#9CA3AF', 'font-size': '14px' }}>
          Loading portfolio…
        </div>
      </Show>

      {/* ── Empty state ─────────────────────────────────────────────────── */}
      <Show when={!loading() && items().length === 0 && !showForm()}>
        <div style={{ ...CARD, 'text-align': 'center', padding: '48px 24px' }}>
          <p style={{ margin: '0', 'font-size': '40px' }}>🗂️</p>
          <p style={{ margin: '12px 0 4px', 'font-size': '16px', 'font-weight': '700', color: '#111827' }}>
            No portfolio items yet
          </p>
          <p style={{ margin: '0 0 16px', 'font-size': '13px', color: '#6B7280' }}>
            Add your first work sample to attract clients.
          </p>
          <button type="button" onClick={openCreate} style={BTN_ORANGE}>
            + Add First Item
          </button>
        </div>
      </Show>

      {/* ── Portfolio grid ─────────────────────────────────────────────── */}
      <Show when={!loading() && items().length > 0}>
        <div style={{ display: 'grid', 'grid-template-columns': '1fr 1fr', gap: '12px' }}>
          <For each={items()}>
            {(item) => (
              <div style={{
                ...CARD,
                padding: '16px',
                display: 'flex',
                'flex-direction': 'column',
                gap: '8px',
              }}>
                {/* Placeholder image area */}
                <div style={{
                  height: '120px',
                  'border-radius': '8px',
                  background: '#F3F4F6',
                  display: 'flex',
                  'align-items': 'center',
                  'justify-content': 'center',
                  color: '#D1D5DB',
                  'font-size': '28px',
                }}>
                  🖼️
                </div>

                <p style={{ margin: '0', 'font-size': '14px', 'font-weight': '700', color: '#111827' }}>
                  {item.title}
                </p>

                <Show when={item.description}>
                  <p style={{ margin: '0', 'font-size': '12px', color: '#6B7280', 'line-height': '1.5' }}>
                    {item.description}
                  </p>
                </Show>

                <Show when={item.tags && item.tags.length > 0}>
                  <div style={{ display: 'flex', 'flex-wrap': 'wrap', gap: '4px' }}>
                    <For each={item.tags}>
                      {(tag) => (
                        <span style={{
                          'font-size': '10px',
                          'font-weight': '700',
                          color: '#6B7280',
                          background: '#F3F4F6',
                          border: '1px solid #E5E7EB',
                          'border-radius': '6px',
                          padding: '2px 8px',
                        }}>
                          {tag}
                        </span>
                      )}
                    </For>
                  </div>
                </Show>

                <div style={{ display: 'flex', gap: '8px', 'margin-top': '4px' }}>
                  <button
                    type="button"
                    onClick={() => openEdit(item)}
                    style={{ ...BTN_GHOST, height: '30px', 'font-size': '11px', padding: '0 12px', flex: '1' }}
                  >
                    Edit
                  </button>
                  <button
                    type="button"
                    onClick={() => handleDelete(item.id)}
                    disabled={deleting() === item.id}
                    style={{
                      height: '30px',
                      'border-radius': '8px',
                      border: '1px solid #FECACA',
                      background: '#fff',
                      color: '#EF4444',
                      'font-size': '11px',
                      'font-weight': '700',
                      padding: '0 12px',
                      cursor: 'pointer',
                      flex: '1',
                      opacity: deleting() === item.id ? '0.6' : '1',
                    }}
                  >
                    {deleting() === item.id ? '…' : 'Delete'}
                  </button>
                </div>
              </div>
            )}
          </For>
        </div>
      </Show>
    </div>
  );
}