package models

import (
	"time"
)

// User represents the single admin user
type User struct {
	ID           string                 `json:"id"`
	Username     string                 `json:"username"`
	PasswordHash string                 `json:"-"`
	Preferences  map[string]interface{} `json:"preferences,omitempty"`
	CreatedAt    time.Time              `json:"created_at"`
	UpdatedAt    time.Time              `json:"updated_at"`
}

// SearchHistoryItem tracks user search history for autocomplete
type SearchHistoryItem struct {
	Keyword        string    `json:"keyword"`
	LastSearchedAt time.Time `json:"last_searched_at"`
	SearchCount    int       `json:"search_count"`
}

// Category represents a folder/tag grouping for feeds
type Category struct {
	ID        string    `json:"id"`
	Title     string    `json:"title"`
	ParentID  *string   `json:"parent_id,omitempty"`
	SortOrder int       `json:"sort_order"`
	FeedCount int       `json:"feed_count,omitempty"`
	CreatedAt time.Time `json:"created_at"`
}

// Feed represents a subscribed RSS/Atom/JSON feed
type Feed struct {
	ID                     string     `json:"id"`
	Title                  string     `json:"title"`
	FeedURL                string     `json:"feed_url"`
	SiteURL                string     `json:"site_url"`
	IconURL                string     `json:"icon_url,omitempty"`
	CategoryID             *string    `json:"category_id,omitempty"`
	CategoryTitle          string     `json:"category_title,omitempty"`
	IsVirtualDigest        bool       `json:"is_virtual_digest"`
	RefreshIntervalMinutes int        `json:"refresh_interval_minutes"`
	TimeoutSeconds         int        `json:"timeout_seconds"`
	ETag                   string     `json:"etag,omitempty"`
	LastModified           string     `json:"last_modified,omitempty"`
	LastFetchedAt          *time.Time `json:"last_fetched_at,omitempty"`
	FetchError             string     `json:"fetch_error,omitempty"`
	UnreadCount            int        `json:"unread_count"`
	TotalCount             int        `json:"total_count"`
	CreatedAt              time.Time  `json:"created_at"`
}

// FeedEntry represents an individual article or digest entry
type FeedEntry struct {
	ID          string                  `json:"id"`
	FeedID      string                  `json:"feed_id"`
	FeedTitle   string                  `json:"feed_title"`
	FeedSiteURL string                  `json:"feed_site_url,omitempty"`
	GUID        string                  `json:"guid"`
	URL         string                  `json:"url"`
	Title       string                  `json:"title"`
	Author      string                  `json:"author,omitempty"`
	Content     string                  `json:"content"` // Immutable original RSS content
	RawContent  string                  `json:"raw_content,omitempty"`
	PublishedAt time.Time               `json:"published_at"`
	IsRead      bool                    `json:"is_read"`
	IsStarred   bool                    `json:"is_starred"`
	ShareUUID   *string                 `json:"share_uuid"`
	Variants    map[string]EntryVariant `json:"variants,omitempty"`
	Metadata    map[string]interface{}  `json:"metadata,omitempty"`
	CreatedAt   time.Time               `json:"created_at"`
}

// EntryVariant represents an extensible enrichment result (readability, keywords, ai_summary, tts)
type EntryVariant struct {
	EntryID     string                 `json:"entry_id"`
	VariantKey  string                 `json:"variant_key"`
	ContentType string                 `json:"content_type"` // 'text', 'html', 'json', 'yaml', 'audio/mp3', 'binary'
	TextValue   string                 `json:"text_value,omitempty"`
	BlobPath    string                 `json:"blob_path,omitempty"`
	StreamURL   string                 `json:"stream_url,omitempty"`
	Metadata    map[string]interface{} `json:"metadata,omitempty"`
	CreatedAt   time.Time              `json:"created_at"`
	UpdatedAt   time.Time              `json:"updated_at"`
}

// Rule represents a filter/automation hook rule
type Rule struct {
	ID         string          `json:"id"`
	Name       string          `json:"name"`
	Trigger    string          `json:"trigger"` // 'on_post_created', 'on_post_updated', 'on_variant_updated', 'manual'
	Conditions []RuleCondition `json:"conditions"`
	MatchMode  string          `json:"match_mode"` // 'all' (AND) or 'any' (OR)
	Actions    []RuleAction    `json:"actions"`
	IsActive   bool            `json:"is_active"`
	CreatedAt  time.Time       `json:"created_at"`
	UpdatedAt  time.Time       `json:"updated_at"`
}

// RuleCondition represents a single condition predicate
type RuleCondition struct {
	Field    string      `json:"field"`    // 'feed_id', 'title', 'author', 'variants.keywords', 'variants.readability_full_text'
	Operator string      `json:"operator"` // 'eq', 'neq', 'in', 'contains', 'matches'
	Value    interface{} `json:"value"`
}

// RuleAction represents an action triggered by a rule
type RuleAction struct {
	Type   string                 `json:"type"` // 'readability_scrape', 'mark_read', 'mark_starred', 'extract_keywords', 'ai_summary', 'tts'
	Params map[string]interface{} `json:"params,omitempty"`
}

// Stats represents dashboard aggregate counts
type Stats struct {
	TotalFeeds      int `json:"total_feeds"`
	TotalUnread     int `json:"total_unread"`
	TotalStarred    int `json:"total_starred"`
	TotalShared     int `json:"total_shared"`
	TotalCategories int `json:"total_categories"`
	TotalRules      int `json:"total_rules"`
}

// LoginRequest is the body for POST /api/auth/login
type LoginRequest struct {
	Username string `json:"username"`
	Password string `json:"password"`
}

// LoginResponse is the response returned on successful auth
type LoginResponse struct {
	Token string `json:"token"`
	User  User   `json:"user"`
}

// CreateFeedRequest is the body for POST /api/feeds
type CreateFeedRequest struct {
	FeedURL                string  `json:"feed_url"`
	CategoryID             *string `json:"category_id,omitempty"`
	Title                  *string `json:"title,omitempty"`
	IconURL                *string `json:"icon_url,omitempty"`
	RefreshIntervalMinutes *int    `json:"refresh_interval_minutes,omitempty"`
	TimeoutSeconds         *int    `json:"timeout_seconds,omitempty"`
}

// UpdateFeedRequest is the body for PUT /api/feeds/{id}
type UpdateFeedRequest struct {
	Title                  *string `json:"title,omitempty"`
	CategoryID             *string `json:"category_id,omitempty"`
	IconURL                *string `json:"icon_url,omitempty"`
	RefreshIntervalMinutes *int    `json:"refresh_interval_minutes,omitempty"`
	TimeoutSeconds         *int    `json:"timeout_seconds,omitempty"`
}

// UpdateEntryReadRequest
type UpdateEntryReadRequest struct {
	IsRead bool `json:"is_read"`
}

// UpdateEntryStarRequest
type UpdateEntryStarRequest struct {
	IsStarred bool `json:"is_starred"`
}

// MarkAllReadRequest
type MarkAllReadRequest struct {
	FeedID     *string `json:"feed_id,omitempty"`
	CategoryID *string `json:"category_id,omitempty"`
	Before     *string `json:"before,omitempty"`
}

// ChangePasswordRequest is the body for PUT /api/auth/password
type ChangePasswordRequest struct {
	OldPassword string `json:"old_password"`
	NewPassword string `json:"new_password"`
}

// Job represents a background task in the persistent job queue
type Job struct {
	ID             string                 `json:"id"`
	Type           string                 `json:"type"`
	Payload        map[string]interface{} `json:"payload"`
	Status         string                 `json:"status"` // 'pending', 'running', 'completed', 'failed', 'cancelled'
	Progress       int                    `json:"progress"`
	Result         map[string]interface{} `json:"result,omitempty"`
	ErrorMessage   string                 `json:"error_message,omitempty"`
	Attempts       int                    `json:"attempts"`
	MaxAttempts    int                    `json:"max_attempts"`
	IdempotencyKey string                 `json:"idempotency_key,omitempty"`
	RunAt          time.Time              `json:"run_at"`
	CreatedAt      time.Time              `json:"created_at"`
	UpdatedAt      time.Time              `json:"updated_at"`
}

// JobFilter is used to filter job listings
type JobFilter struct {
	Type   string
	Status string
	Limit  int
	Offset int
}

// PatchEntryRequest is the body for PATCH /api/entries/{id}
type PatchEntryRequest struct {
	IsRead    *bool                    `json:"is_read,omitempty"`
	IsStarred *bool                    `json:"is_starred,omitempty"`
	Metadata  map[string]interface{}   `json:"metadata,omitempty"`
	Variants  map[string]*EntryVariant `json:"variants,omitempty"`
}

// EntryDiff represents the delta between OldState and NewState of an Entry
type EntryDiff struct {
	FieldsChanged   []string `json:"fields_changed"`   // e.g. ["is_read", "is_starred", "metadata.tags"]
	VariantsAdded   []string `json:"variants_added"`   // e.g. ["readability_full_text"]
	VariantsChanged []string `json:"variants_changed"` // e.g. ["ai_summary"]
	VariantsRemoved []string `json:"variants_removed"`
}

// HasVariantAddition checks if a specific variant key was newly added in this transition
func (d EntryDiff) HasVariantAddition(variantKey string) bool {
	for _, k := range d.VariantsAdded {
		if k == variantKey {
			return true
		}
	}
	return false
}

// HasVariantChange checks if a specific variant key was modified in this transition
func (d EntryDiff) HasVariantChange(variantKey string) bool {
	for _, k := range d.VariantsChanged {
		if k == variantKey {
			return true
		}
	}
	return false
}

// HasFieldChange checks if a specific top-level or metadata field changed
func (d EntryDiff) HasFieldChange(fieldName string) bool {
	for _, f := range d.FieldsChanged {
		if f == fieldName {
			return true
		}
	}
	return false
}

// PromptTemplate represents an AI prompt template
type PromptTemplate struct {
	ID          string `json:"id"`
	Name        string `json:"name"`
	Description string `json:"description,omitempty"`
	Prompt      string `json:"prompt"`
	IsDefault   bool   `json:"is_default,omitempty"`
}

// AISettings represents AI provider configuration
type AISettings struct {
	Enabled     bool             `json:"enabled"`
	Provider    string           `json:"provider"`
	BaseURL     string           `json:"base_url"`
	APIKey      string           `json:"api_key"`
	Model       string           `json:"model"`
	Temperature float64          `json:"temperature"`
	MaxTokens   int              `json:"max_tokens"`
	Prompts     []PromptTemplate `json:"prompts"`
}