import { useMemo } from 'react'
import {
  Button,
  Popover,
  Slider,
  InputNumber,
  Space,
  Typography,
  Divider,
  Collapse,
  Tooltip,
} from 'antd'
import { SettingOutlined, QuestionCircleOutlined, ReloadOutlined } from '@ant-design/icons'
import {
  DEFAULT_RANKING_PARAMS,
  type RankingParams,
} from '../utils/scoring'
import { getConfigDisplayLabel } from '../api/configCodes'

const { Text } = Typography

interface Props {
  params: RankingParams
  onChange: (next: RankingParams) => void
  /** 当前结果集中出现过的 configCode 列表, 用于 "按维度阈值覆盖" 折叠面板 */
  configCodesInResult: string[]
  /** 后端字典 (configCode → 中文标签) */
  configCodes: Record<string, string>
}

const FORMULA_TEXT = `综合得分 = c × (α × sim_norm + (1-α) × rov_norm)
  sim_norm = clip((sim - simThreshold) / (1 - simThreshold), 0, 1)
  rov_norm = clip((rov - rovP5) / (rovP95 - rovP5), 0, 1)
  c = deconstructBoost (选题/灵感点/关键点/目的点) / 1.0 (其他维度)
先按 simThreshold 硬筛 (sim < 阈值剔除), 再按综合分排序.`

export default function RankingSettingsButton({
  params,
  onChange,
  configCodesInResult,
  configCodes,
}: Props) {
  const update = (patch: Partial<RankingParams>) => onChange({ ...params, ...patch })

  const updateCodeThreshold = (code: string, value: number | null) => {
    const next = { ...params.simThresholdsByCode }
    if (value == null) delete next[code]
    else next[code] = value
    update({ simThresholdsByCode: next })
  }

  const codeRows = useMemo(
    () =>
      configCodesInResult.map((c) => ({
        code: c,
        label: getConfigDisplayLabel(c, configCodes),
        override: params.simThresholdsByCode[c],
      })),
    [configCodesInResult, configCodes, params.simThresholdsByCode],
  )

  const content = (
    <div style={{ width: 380 }}>
      <Space direction="vertical" size={12} style={{ width: '100%' }}>
        <Row label="相似度阈值 simThreshold" tip="低于此值的结果被剔除, 同时作为 sim_norm 的下界">
          <InputNumber
            min={0}
            max={1}
            step={0.01}
            value={params.simThreshold}
            onChange={(v) => update({ simThreshold: typeof v === 'number' ? v : 0 })}
            style={{ width: 120 }}
          />
        </Row>

        <Row label="α 相关性权重" tip="α 越大越看重相关性, 越小越看重 ROV 质量">
          <div style={{ display: 'flex', alignItems: 'center', gap: 8, width: '100%' }}>
            <Slider
              min={0}
              max={1}
              step={0.05}
              value={params.alpha}
              onChange={(v) => update({ alpha: v })}
              style={{ flex: 1 }}
            />
            <InputNumber
              min={0}
              max={1}
              step={0.05}
              value={params.alpha}
              onChange={(v) => update({ alpha: typeof v === 'number' ? v : 0.6 })}
              style={{ width: 80 }}
            />
          </div>
        </Row>

        <Row label="ROV 归一化下界 rovP5">
          <InputNumber
            min={0}
            max={1}
            step={0.001}
            value={params.rovP5}
            onChange={(v) => update({ rovP5: typeof v === 'number' ? v : 0 })}
            style={{ width: 120 }}
          />
        </Row>

        <Row label="ROV 归一化上界 rovP95">
          <InputNumber
            min={0}
            max={1}
            step={0.001}
            value={params.rovP95}
            onChange={(v) => update({ rovP95: typeof v === 'number' ? v : 0.07 })}
            style={{ width: 120 }}
          />
        </Row>

        {/* 素材质量维度权重 */}
        <Divider orientation="left" style={{ fontSize: 12, margin: '8px 0' }}>素材质量维度权重</Divider>

        <Row label="相似度 wSim" tip="素材模态下相似度的权重">
          <Slider
            min={0} max={1} step={0.05}
            value={params.wSim}
            onChange={(v) => update({ wSim: typeof v === 'number' ? v : 0.4 })}
          />
          <span style={{ width: 48, textAlign: 'right' }}>{params.wSim.toFixed(2)}</span>
        </Row>

        <Row label="打开率 wCtr" tip="CTR 百分位的权重">
          <Slider
            min={0} max={1} step={0.05}
            value={params.wCtr}
            onChange={(v) => update({ wCtr: typeof v === 'number' ? v : 0.3 })}
          />
          <span style={{ width: 48, textAlign: 'right' }}>{params.wCtr.toFixed(2)}</span>
        </Row>

        <Row label="裂变率 wViral" tip="裂变率百分位的权重">
          <Slider
            min={0} max={1} step={0.05}
            value={params.wViral}
            onChange={(v) => update({ wViral: typeof v === 'number' ? v : 0.2 })}
          />
          <span style={{ width: 48, textAlign: 'right' }}>{params.wViral.toFixed(2)}</span>
        </Row>

        <Row label="ROI wRoi" tip="ROI 百分位的权重">
          <Slider
            min={0} max={1} step={0.05}
            value={params.wRoi}
            onChange={(v) => update({ wRoi: typeof v === 'number' ? v : 0.1 })}
          />
          <span style={{ width: 48, textAlign: 'right' }}>{params.wRoi.toFixed(2)}</span>
        </Row>

        <Divider orientation="left" style={{ fontSize: 12, margin: '8px 0' }}>视频维度</Divider>

        <Row
          label="解构加权 c"
          tip="选题 / 灵感点 / 关键点 / 目的点 维度的额外加权系数, 其他维度恒为 1"
        >
          <InputNumber
            min={0.5}
            max={3}
            step={0.05}
            value={params.deconstructBoost}
            onChange={(v) => update({ deconstructBoost: typeof v === 'number' ? v : 1.2 })}
            style={{ width: 120 }}
          />
        </Row>

        {codeRows.length > 0 && (
          <Collapse
            size="small"
            ghost
            items={[
              {
                key: 'override',
                label: (
                  <Text style={{ fontSize: 12 }}>
                    按维度覆盖阈值 (
                    {Object.keys(params.simThresholdsByCode).length} / {codeRows.length} 已设)
                  </Text>
                ),
                children: (
                  <Space direction="vertical" size={6} style={{ width: '100%' }}>
                    {codeRows.map((r) => (
                      <div
                        key={r.code}
                        style={{ display: 'flex', alignItems: 'center', gap: 8 }}
                      >
                        <Text style={{ flex: 1, fontSize: 12 }}>{r.label}</Text>
                        <InputNumber
                          size="small"
                          min={0}
                          max={1}
                          step={0.01}
                          placeholder={`默认 ${params.simThreshold}`}
                          value={r.override}
                          onChange={(v) =>
                            updateCodeThreshold(r.code, typeof v === 'number' ? v : null)
                          }
                          style={{ width: 110 }}
                        />
                      </div>
                    ))}
                  </Space>
                ),
              },
            ]}
          />
        )}

        <Divider style={{ margin: '4px 0' }} />
        <div style={{ display: 'flex', justifyContent: 'flex-end' }}>
          <Button
            size="small"
            icon={<ReloadOutlined />}
            onClick={() => onChange(DEFAULT_RANKING_PARAMS)}
          >
            重置默认
          </Button>
        </div>
      </Space>
    </div>
  )

  const title = (
    <div style={{ display: 'flex', alignItems: 'center', gap: 6 }}>
      <span>排序参数</span>
      <Tooltip
        overlayStyle={{ maxWidth: 480 }}
        title={<pre style={{ margin: 0, whiteSpace: 'pre-wrap', fontSize: 12 }}>{FORMULA_TEXT}</pre>}
      >
        <QuestionCircleOutlined style={{ color: 'rgba(0,0,0,0.45)' }} />
      </Tooltip>
    </div>
  )

  return (
    <Popover trigger="click" placement="bottomRight" title={title} content={content}>
      <Button icon={<SettingOutlined />}>排序参数</Button>
    </Popover>
  )
}

function Row({ label, tip, children }: { label: string; tip?: string; children: React.ReactNode }) {
  return (
    <div>
      <div style={{ marginBottom: 4, fontSize: 12, display: 'flex', alignItems: 'center', gap: 4 }}>
        <Text style={{ fontSize: 12 }}>{label}</Text>
        {tip && (
          <Tooltip title={tip}>
            <QuestionCircleOutlined style={{ fontSize: 11, color: 'rgba(0,0,0,0.45)' }} />
          </Tooltip>
        )}
      </div>
      {children}
    </div>
  )
}