import type { ConfigDisplayFields } from "../types/templateLibrary"
import {
  TEMPLATE_TYPES,
  CATEGORY_GRADIENT_MAP,
  DEFAULT_GRADIENT,
  MATERIAL_TYPE_LABELS,
} from "../constants/templateLibrary"
import type { TemplateSegment } from "@/api/templates"

/** 获取类型对应颜色 */
export const getTypeColor = (type: string): string => {
  const found = TEMPLATE_TYPES.find((t) => t.type === type)
  return found?.color ?? "#6366f1"
}

/** 根据 category 生成占位渐变色 */
export const gradientForCategory = (category: string): string => {
  return CATEGORY_GRADIENT_MAP[category] ?? DEFAULT_GRADIENT
}

/** 格式化时长 */
export const formatDuration = (seconds: number | undefined | null): string => {
  if (!seconds || seconds <= 0) return "0秒"
  const totalSec = Math.round(seconds)
  const m = Math.floor(totalSec / 60)
  const s = totalSec % 60
  if (m === 0) return `${s}秒`
  return `${m}分${s > 0 ? `${s}秒` : ""}`
}

/** 格式化配置对象为可读文本 */
export const formatConfig = (config?: object): string => {
  if (!config || Object.keys(config).length === 0) return "默认"
  const c = config as ConfigDisplayFields
  const parts: string[] = []
  if (c.font_size) parts.push(`字号: ${c.font_size}`)
  if (c.font_family) parts.push(`字体: ${c.font_family}`)
  if (c.color) parts.push(`颜色: ${c.color}`)
  if (c.position) parts.push(`位置: ${c.position}`)
  if (c.volume !== undefined) parts.push(`音量: ${c.volume}%`)
  if (c.name) parts.push(String(c.name))
  return parts.length > 0 ? parts.join(" / ") : JSON.stringify(config)
}

/** 获取素材类型标签文本 */
export const getMaterialTypeLabel = (materialType: string | null | undefined): string => {
  if (!materialType) return "不限"
  return MATERIAL_TYPE_LABELS[materialType] ?? materialType
}

/** 计算片段总时长（取每个片段 min/max 的平均值） */
export const calcTotalSegmentDuration = (segments: TemplateSegment[]): number => {
  return segments.reduce((sum, s) => sum + (s.duration_min + s.duration_max) / 2, 0)
}