import type {
  ProfileTaskCenterResponse,
  ProfileTaskItem,
} from '../../../packages/shared/src/contracts/runtime';

const PROFILE_TASK_STATUS_PRIORITY_RANK: Record<
  ProfileTaskItem['status'],
  number
> = {
  claimable: 2,
  incomplete: 1,
  disabled: 0,
  claimed: -1,
};
const PROFILE_TASK_CARD_FALLBACK_REWARD_POINTS = 10;
const PROFILE_TASK_STATUS_LABELS: Record<ProfileTaskItem['status'], string> = {
  incomplete: '未完成',
  claimable: '可领取',
  claimed: '已领取',
  disabled: '已停用',
};

export type ProfileTaskCardSummary = {
  actionLabel: string;
  progressCount: number;
  progressPercent: number;
  rewardPoints: number;
  threshold: number;
};

export function selectProfileTaskCenterTasks(tasks: ProfileTaskItem[]) {
  return tasks
    .map((task, index) => ({ task, index }))
    .filter(
      ({ task }) =>
        task.status === 'claimable' || task.status === 'incomplete',
    )
    .sort(
      (left, right) =>
        PROFILE_TASK_STATUS_PRIORITY_RANK[right.task.status] -
          PROFILE_TASK_STATUS_PRIORITY_RANK[left.task.status] ||
        left.index - right.index,
    )
    .slice(0, 1)
    .map(({ task }) => task);
}

export function selectProfileTaskCardTask(tasks: ProfileTaskItem[]) {
  return (
    selectProfileTaskCenterTasks(tasks)[0] ??
    tasks.find((task) => task.status === 'claimed') ??
    tasks.find((task) => task.status !== 'disabled') ??
    null
  );
}

export function getProfileTaskStatusLabel(status: ProfileTaskItem['status']) {
  return PROFILE_TASK_STATUS_LABELS[status];
}

export function buildProfileTaskProgressLabel(task: ProfileTaskItem) {
  const threshold = Math.max(1, task.threshold);
  const progressCount = Math.min(Math.max(0, task.progressCount), threshold);
  return `${progressCount}/${threshold}`;
}

export function getProfileTaskClaimButtonLabel(
  task: ProfileTaskItem,
  isClaiming: boolean,
) {
  if (isClaiming) {
    return '领取中';
  }

  if (task.status === 'claimed') {
    return '已领取';
  }

  return task.status === 'claimable' ? '领取' : '未完成';
}

export function buildProfileTaskCardSummary(
  center: ProfileTaskCenterResponse | null,
): ProfileTaskCardSummary {
  const task = selectProfileTaskCardTask(center?.tasks ?? []);
  const threshold = Math.max(1, task?.threshold ?? 1);
  const progressCount = Math.min(
    Math.max(0, task?.progressCount ?? 0),
    threshold,
  );
  const rewardPoints =
    task?.rewardPoints ?? PROFILE_TASK_CARD_FALLBACK_REWARD_POINTS;
  const actionLabel =
    task?.status === 'claimable'
      ? '领取'
      : task?.status === 'claimed'
        ? '已完成'
        : '去完成';

  return {
    actionLabel,
    progressCount,
    progressPercent: Math.round((progressCount / threshold) * 100),
    rewardPoints,
    threshold,
  };
}