package model

import (
	"context"
	"strings"
	"time"

	"spark-server/internal/module/square/entity"
	"spark-server/internal/pkg/errs"
)

func (m *MemoryRepo) CreatePost(_ context.Context, post *entity.Post, audience []int64) error {
	if post == nil || post.ID <= 0 || post.UserID <= 0 {
		return errs.ErrInvalidArgument
	}
	m.mu.Lock()
	defer m.mu.Unlock()
	if _, ok := m.posts[post.ID]; ok {
		return errs.ErrDuplicate
	}
	m.posts[post.ID] = clonePost(post)
	if len(audience) > 0 {
		m.audience[post.ID] = append([]int64(nil), audience...)
	}
	return nil
}

func (m *MemoryRepo) CreateBotPost(_ context.Context, post *entity.Post) error {
	if post == nil || post.ID <= 0 || post.UserID <= 0 {
		return errs.ErrInvalidArgument
	}
	url := strings.TrimSpace(post.SourceURL)
	if url == "" {
		return errs.ErrInvalidArgument
	}
	post.SourceURL = url
	if post.Source == 0 {
		post.Source = entity.SourceBotRSS
	}
	m.mu.Lock()
	defer m.mu.Unlock()
	if _, ok := m.botLinks[url]; ok {
		return errs.ErrDuplicate
	}
	if _, ok := m.posts[post.ID]; ok {
		return errs.ErrDuplicate
	}
	m.botLinks[url] = post.ID
	m.posts[post.ID] = clonePost(post)
	return nil
}

func (m *MemoryRepo) SoftDeleteExpiredBotPosts(_ context.Context, nowMS int64, limit int) ([]*entity.Post, error) {
	if limit <= 0 {
		limit = 100
	}
	if nowMS <= 0 {
		nowMS = time.Now().UnixMilli()
	}
	m.mu.Lock()
	defer m.mu.Unlock()
	out := make([]*entity.Post, 0)
	for _, row := range m.posts {
		if row.Status != entity.StatusNormal || !row.Source.IsBot() {
			continue
		}
		if !row.Expired(nowMS) {
			continue
		}
		row.Status = entity.StatusDeleted
		out = append(out, clonePost(row))
		if len(out) >= limit {
			break
		}
	}
	return out, nil
}

func (m *MemoryRepo) SoftDeletePost(_ context.Context, userID, postID int64) (*entity.Post, error) {
	m.mu.Lock()
	defer m.mu.Unlock()
	row, ok := m.posts[postID]
	if !ok || row.UserID != userID || row.Status == entity.StatusDeleted {
		return nil, errs.ErrNotFound
	}
	row.Status = entity.StatusDeleted
	return clonePost(row), nil
}

func (m *MemoryRepo) AddLike(_ context.Context, like *entity.Like) (bool, error) {
	if like == nil || like.PostID <= 0 || like.UserID <= 0 {
		return false, errs.ErrInvalidArgument
	}
	m.mu.Lock()
	defer m.mu.Unlock()
	post, ok := m.posts[like.PostID]
	if !ok {
		return false, errs.ErrNotFound
	}
	key := likeKey{PostID: like.PostID, UserID: like.UserID}
	if _, ok := m.likes[key]; ok {
		return false, nil
	}
	cp := *like
	if cp.CreatedAtMS == 0 {
		cp.CreatedAtMS = time.Now().UnixMilli()
	}
	m.likes[key] = &cp
	post.LikeCount++
	return true, nil
}

func (m *MemoryRepo) RemoveLike(_ context.Context, postID, userID int64) error {
	m.mu.Lock()
	defer m.mu.Unlock()
	key := likeKey{PostID: postID, UserID: userID}
	if _, ok := m.likes[key]; !ok {
		return errs.ErrNotFound
	}
	delete(m.likes, key)
	if post, ok := m.posts[postID]; ok && post.LikeCount > 0 {
		post.LikeCount--
	}
	return nil
}

func (m *MemoryRepo) AddComment(_ context.Context, c *entity.Comment) error {
	if c == nil || c.ID <= 0 || c.PostID <= 0 || c.UserID <= 0 {
		return errs.ErrInvalidArgument
	}
	m.mu.Lock()
	defer m.mu.Unlock()
	post, ok := m.posts[c.PostID]
	if !ok {
		return errs.ErrNotFound
	}
	if _, ok := m.comments[c.ID]; ok {
		return errs.ErrDuplicate
	}
	m.comments[c.ID] = cloneComment(c)
	post.CommentCount++
	return nil
}

func (m *MemoryRepo) SoftDeleteComment(_ context.Context, id int64) error {
	m.mu.Lock()
	defer m.mu.Unlock()
	row, ok := m.comments[id]
	if !ok || row.Status == entity.StatusDeleted {
		return errs.ErrNotFound
	}
	row.Status = entity.StatusDeleted
	if post, ok := m.posts[row.PostID]; ok && post.CommentCount > 0 {
		post.CommentCount--
	}
	return nil
}

func (m *MemoryRepo) CreateNotices(_ context.Context, rows []*entity.Notice) error {
	m.mu.Lock()
	defer m.mu.Unlock()
	for _, n := range rows {
		if n == nil || n.ID <= 0 {
			return errs.ErrInvalidArgument
		}
		if _, ok := m.notices[n.ID]; ok {
			return errs.ErrDuplicate
		}
		cp := *n
		m.notices[n.ID] = &cp
	}
	return nil
}

func (m *MemoryRepo) MarkNoticesRead(_ context.Context, userID, cursor int64) error {
	m.mu.Lock()
	defer m.mu.Unlock()
	now := time.Now().UnixMilli()
	for _, n := range m.notices {
		if n.ToUserID != userID || n.ReadAtMS > 0 {
			continue
		}
		if cursor > 0 && n.ID > cursor {
			continue
		}
		n.ReadAtMS = now
	}
	return nil
}

func (m *MemoryRepo) AdvanceNoticeRead(_ context.Context, userID, noticeID int64) error {
	if userID <= 0 || noticeID <= 0 {
		return errs.ErrInvalidArgument
	}
	m.mu.Lock()
	defer m.mu.Unlock()
	cur := m.noticeState[userID]
	if cur == nil {
		cur = entity.DefaultNoticeState(userID)
		m.noticeState[userID] = cur
	}
	if cur.LastReadNoticeID >= noticeID {
		return nil
	}
	cur.LastReadNoticeID = noticeID
	cur.UpdatedAtMS = time.Now().UnixMilli()
	return nil
}