import { useNavigate } from 'react-router-dom'
import { useState } from 'react'
import { useCapabilities } from '../hooks/useCapabilities.js'
import { getWidgetsForArea } from '../registry/widgetRegistry.js'
import { useSession } from '../context/SessionContext.jsx'
import { InitiativeForm } from '../components/InitiativeForm.jsx'
import { createInitiative } from '../api/initiatives.js'
import { saveInitiativeDynamicFields, splitInitiativeFormPayload } from '../api/entityFields.js'
import { scopedPath } from '../utils/routes.js'
import { Link } from 'react-router-dom'

export function WorkspacePage() {
  const navigate = useNavigate()
  const { context } = useSession()
  const { capabilities, hasCapability } = useCapabilities()
  const widgets = getWidgetsForArea('workspace', capabilities)
  const [showForm, setShowForm] = useState(false)
  const [formBusy, setFormBusy] = useState(false)
  const [formError, setFormError] = useState(null)

  async function handleCreateInitiative(payload) {
    setFormBusy(true)
    setFormError(null)
    const { core, dynamicFields } = splitInitiativeFormPayload(payload)
    try {
      const created = await createInitiative({
        ...core,
        owner_actor_id: context?.actor?.id,
      })
      await saveInitiativeDynamicFields(created.id, dynamicFields)
      setShowForm(false)
      navigate(scopedPath('/plan/profile', { initiativeId: created.id }))
    } catch (err) {
      setFormError(err.message)
    } finally {
      setFormBusy(false)
    }
  }

  return (
    <div className="app-page">
      <header className="page-header">
        <div>
          <h1>Workspace</h1>
          <p className="page-lead">Portfolio-Überblick und nächste Schritte über alle Vorhaben.</p>
        </div>
        {hasCapability('kairo.initiative.manage') && (
          <button
            type="button"
            className="btn btn-primary btn-block-mobile"
            onClick={() => setShowForm((v) => !v)}
          >
            {showForm ? 'Abbrechen' : 'Vorhaben anlegen'}
          </button>
        )}
      </header>

      {showForm && (
        <section className="card inline-form-card">
          <h2 className="card-title card-title--lg">Neues Vorhaben</h2>
          {formError && <p className="error">{formError}</p>}
          <InitiativeForm
            onSubmit={handleCreateInitiative}
            onCancel={() => setShowForm(false)}
            busy={formBusy}
            submitLabel="Vorhaben anlegen"
          />
        </section>
      )}

      <div className="widget-grid">
        {widgets.map((widget) => {
          const Component = widget.component
          return <Component key={widget.key} />
        })}
      </div>

      {hasCapability('kairo.initiative.read') && (
        <p className="page-footer-link">
          <Link to="/initiatives" className="link-inline">
            Zur Vorhabenliste →
          </Link>
        </p>
      )}
    </div>
  )
}