'use client'

import { useState, useCallback } from 'react'
import type { QualityMetric } from '../_components/MetricCard'
import type { QualityTest } from '../_components/TestRow'

interface Stats {
  total_metrics: number
  avg_score: number
  metrics_above_threshold: number
  passed: number
  failed: number
  warning: number
  total_tests: number
}

const API_BASE = '/api/sdk/v1/compliance/quality'

export function useQualityData() {
  const [metrics, setMetrics] = useState<QualityMetric[]>([])
  const [tests, setTests] = useState<QualityTest[]>([])
  const [apiStats, setApiStats] = useState<Stats | null>(null)
  const [loading, setLoading] = useState(true)

  const loadAll = useCallback(async () => {
    setLoading(true)
    try {
      const [metricsRes, testsRes, statsRes] = await Promise.all([
        fetch(`${API_BASE}/metrics?limit=100`),
        fetch(`${API_BASE}/tests?limit=100`),
        fetch(`${API_BASE}/stats`),
      ])
      if (metricsRes.ok) {
        const d = await metricsRes.json()
        setMetrics(Array.isArray(d.metrics) ? d.metrics : [])
      }
      if (testsRes.ok) {
        const d = await testsRes.json()
        setTests(Array.isArray(d.tests) ? d.tests : [])
      }
      if (statsRes.ok) {
        setApiStats(await statsRes.json())
      }
    } catch (err) {
      console.error('Failed to load quality data:', err)
    } finally {
      setLoading(false)
    }
  }, [])

  const handleCreateMetric = useCallback(async (form: any) => {
    try {
      const res = await fetch(`${API_BASE}/metrics`, {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify(form),
      })
      if (res.ok) {
        const created = await res.json()
        setMetrics(prev => [...prev, created])
        loadAll()
      }
    } catch (err) {
      console.error('Failed to create metric:', err)
    }
  }, [loadAll])

  const handleUpdateMetric = useCallback(async (editMetric: QualityMetric, form: any) => {
    try {
      const res = await fetch(`${API_BASE}/metrics/${editMetric.id}`, {
        method: 'PUT',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify(form),
      })
      if (res.ok) {
        const updated = await res.json()
        setMetrics(prev => prev.map(m => m.id === updated.id ? updated : m))
        loadAll()
      }
    } catch (err) {
      console.error('Failed to update metric:', err)
    }
  }, [loadAll])

  const handleCreateTest = useCallback(async (form: any) => {
    try {
      const res = await fetch(`${API_BASE}/tests`, {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify(form),
      })
      if (res.ok) {
        const created = await res.json()
        setTests(prev => [created, ...prev])
        loadAll()
      }
    } catch (err) {
      console.error('Failed to create test:', err)
    }
  }, [loadAll])

  const handleDeleteTest = useCallback(async (id: string) => {
    try {
      const res = await fetch(`${API_BASE}/tests/${id}`, { method: 'DELETE' })
      if (res.ok || res.status === 204) {
        setTests(prev => prev.filter(t => t.id !== id))
        loadAll()
      }
    } catch (err) {
      console.error('Failed to delete test:', err)
    }
  }, [loadAll])

  return {
    metrics,
    tests,
    apiStats,
    loading,
    loadAll,
    handleCreateMetric,
    handleUpdateMetric,
    handleCreateTest,
    handleDeleteTest,
  }
}