/**
 * 发布岗位 hook：拉取表单、更新字段、预估质量、发布岗位。
 */
import { useCallback, useEffect, useState } from 'react';
import { estimateJobQuality, fetchJobPublishForm, publishJob } from '../api';
import type { JobPublishFormData, JobQualityEstimate } from '../types';
import { useAsyncData } from './useAsyncData';

export function useJobPublish() {
  const fetcher = useCallback(() => fetchJobPublishForm(), []);
  const { data, loading, error, refresh } = useAsyncData<JobPublishFormData>(fetcher);

  const [form, setForm] = useState<JobPublishFormData | null>(null);
  const [estimate, setEstimate] = useState<JobQualityEstimate | null>(null);
  const [estimating, setEstimating] = useState(false);
  const [publishing, setPublishing] = useState(false);

  useEffect(() => {
    if (data && !form) {
      setForm(data);
    }
  }, [data, form]);

  const updateField = useCallback(<K extends keyof JobPublishFormData>(
    field: K,
    value: JobPublishFormData[K],
  ) => {
    setForm((prev) => (prev ? { ...prev, [field]: value } : prev));
  }, []);

  const updateStringField = useCallback((field: keyof JobPublishFormData, value: string) => {
    setForm((prev) => (prev ? { ...prev, [field]: value } : prev));
  }, []);

  const updateNumberField = useCallback((field: keyof JobPublishFormData, value: string) => {
    setForm((prev) => (prev ? { ...prev, [field]: Number(value) || 0 } : prev));
  }, []);

  const toggleBenefit = useCallback((benefit: string) => {
    setForm((prev) => {
      if (!prev) return prev;
      const benefits = prev.benefits.includes(benefit)
        ? prev.benefits.filter((b) => b !== benefit)
        : [...prev.benefits, benefit];
      return { ...prev, benefits };
    });
  }, []);

  const toggleSkill = useCallback((skill: string) => {
    setForm((prev) => {
      if (!prev) return prev;
      const skills = prev.skills.includes(skill)
        ? prev.skills.filter((s) => s !== skill)
        : [...prev.skills, skill];
      return { ...prev, skills };
    });
  }, []);

  const runEstimate = useCallback(async () => {
    if (!form) return;
    setEstimating(true);
    try {
      const result = await estimateJobQuality(form);
      setEstimate(result);
    } finally {
      setEstimating(false);
    }
  }, [form]);

  const publish = useCallback(async () => {
    if (!form) return null;
    setPublishing(true);
    try {
      return await publishJob(form);
    } finally {
      setPublishing(false);
    }
  }, [form]);

  return {
    form,
    loading,
    error,
    refresh,
    updateField,
    updateStringField,
    updateNumberField,
    toggleBenefit,
    toggleSkill,
    estimate,
    estimating,
    runEstimate,
    publishing,
    publish,
  };
}