import { type GameDefinition, type GameControl, type PunchPolicyType } from '../core/gameDefinition'
import { type OrienteeringCourseData } from '../../utils/orienteeringCourse'

function sortBySequence<T extends { sequence: number | null }>(items: T[]): T[] {
  return [...items].sort((a, b) => (a.sequence || 0) - (b.sequence || 0))
}

function buildDisplayBody(label: string, sequence: number | null): string {
  if (typeof sequence === 'number') {
    return `检查点 ${sequence} · ${label || String(sequence)}`
  }

  return label
}

export function buildGameDefinitionFromCourse(
  course: OrienteeringCourseData,
  controlRadiusMeters: number,
  mode: GameDefinition['mode'] = 'classic-sequential',
  autoFinishOnLastControl = true,
  punchPolicy: PunchPolicyType = 'enter-confirm',
  punchRadiusMeters = 5,
  requiresFocusSelection = false,
  skipEnabled = false,
  skipRadiusMeters = 30,
  skipRequiresConfirm = true,
  controlScoreOverrides: Record<string, number> = {},
  defaultControlScore: number | null = null,
): GameDefinition {
  const controls: GameControl[] = []

  for (const start of course.layers.starts) {
    controls.push({
      id: `start-${controls.length + 1}`,
      code: start.label || 'S',
      label: start.label || 'Start',
      kind: 'start',
      point: start.point,
      sequence: null,
      score: null,
      displayContent: null,
    })
  }

  for (const control of sortBySequence(course.layers.controls)) {
    const label = control.label || String(control.sequence)
    const controlId = `control-${control.sequence}`
    const score = controlId in controlScoreOverrides
      ? controlScoreOverrides[controlId]
      : defaultControlScore
    controls.push({
      id: controlId,
      code: label,
      label,
      kind: 'control',
      point: control.point,
      sequence: control.sequence,
      score,
      displayContent: {
        title: score !== null ? `收集 ${label} (+${score}分)` : `收集 ${label}`,
        body: score !== null ? `${buildDisplayBody(label, control.sequence)} · ${score}分` : buildDisplayBody(label, control.sequence),
      },
    })
  }

  for (const finish of course.layers.finishes) {
    controls.push({
      id: `finish-${controls.length + 1}`,
      code: finish.label || 'F',
      label: finish.label || 'Finish',
      kind: 'finish',
      point: finish.point,
      sequence: null,
      score: null,
      displayContent: null,
    })
  }

  return {
    id: `course-${course.title || 'default'}`,
    mode,
    title: course.title || (mode === 'score-o' ? 'Score-O' : 'Classic Sequential'),
    controlRadiusMeters,
    punchRadiusMeters,
    punchPolicy,
    requiresFocusSelection,
    skipEnabled,
    skipRadiusMeters,
    skipRequiresConfirm,
    controls,
    autoFinishOnLastControl,
  }
}