package model

import (
	"strings"
	"time"

	"gorm.io/datatypes"
	"gorm.io/gorm"
)

type User struct {
	ID                 string  `gorm:"primaryKey;size:32"`
	Email              string  `gorm:"size:255;uniqueIndex;not null"`
	Name               string  `gorm:"size:255"`
	PasswordHash       string  `gorm:"size:255"`
	Role               string  `gorm:"size:32;index;not null"`
	Status             string  `gorm:"size:32;index;not null"`
	Credits            float64 `gorm:"not null;default:0"`
	CreditsUsed        float64 `gorm:"not null;default:0"` // 累计已消耗额度：扣费时加、退款时减，充值/发放不计入
	Notes              string  `gorm:"type:text"`
	ConcurrencyGroupID string  `gorm:"size:32;index"`
	AnnouncementSeen   string  `gorm:"size:32"`            // version hash of the last announcement this user dismissed
	RechargeTotal      float64 `gorm:"not null;default:0"` // 累计充值金额(元)
	InviteCode         string  `gorm:"size:32;uniqueIndex"`
	InvitedBy          *string `gorm:"size:32;index"`
	InviteRewardDone   bool    `gorm:"not null;default:false"`
	InviteRewardAt     *time.Time
	CheckinLast        string `gorm:"size:32"`
	CheckinStreak      int    `gorm:"not null;default:0"`
	GenerationCount    int64  `gorm:"not null;default:0"`
	BannedWordHits     int64  `gorm:"not null;default:0"` // 提示词命中违禁词被拦截的累计次数
	LastLoginAt        *time.Time
	LastLoginIP        string `gorm:"size:128"`
	CreatedAt          time.Time
	UpdatedAt          time.Time
	APIKeys            []APIKey `gorm:"foreignKey:UserID"`
}

// BannedWord is an admin-managed prompt blocklist entry. Generation requests
// whose prompt contains Word (case-insensitive substring) are rejected before
// reaching any provider; Hits counts how many requests each word blocked.
type BannedWord struct {
	ID        string `gorm:"primaryKey;size:32"`
	Word      string `gorm:"size:255;uniqueIndex;not null"`
	Hits      int64  `gorm:"not null;default:0"`
	CreatedAt time.Time
	UpdatedAt time.Time
}

// BannedWordHit records one blocked request: which word matched, who sent it,
// and when. Feeds the admin 违禁词触发列表.
type BannedWordHit struct {
	ID        string    `gorm:"primaryKey;size:32"`
	WordID    string    `gorm:"size:32;index"`
	Word      string    `gorm:"size:255;index;not null"`
	UserID    string    `gorm:"size:32;index"`
	UserName  string    `gorm:"size:255"` // snapshot of name/email at hit time
	Prompt    string    `gorm:"type:text"`
	CreatedAt time.Time `gorm:"index"`
}

type APIKey struct {
	ID         string `gorm:"primaryKey;size:32"`
	UserID     string `gorm:"size:32;index;not null"`
	Name       string `gorm:"size:100;not null"`
	KeyPreview string `gorm:"size:32;not null"`
	KeyHash    string `gorm:"size:255;uniqueIndex;not null"`
	CreatedAt  time.Time
	LastUsedAt *time.Time
}

type ShowcaseItem struct {
	ID        string `gorm:"primaryKey;size:32"`
	Kind      string `gorm:"size:32;index;not null"`
	Title     string `gorm:"size:255"`
	Subtitle  string `gorm:"size:255"`
	Prompt    string `gorm:"type:text"`
	Gradient  string `gorm:"type:text"`
	Span      string `gorm:"size:100"`
	Image     string `gorm:"size:500;index"`
	Weight    int    `gorm:"not null;default:0"`
	CreatedAt time.Time
	UpdatedAt time.Time
}

type EventLog struct {
	ID         string         `gorm:"primaryKey;size:32"`
	TS         time.Time      `gorm:"index;not null"`
	Kind       string         `gorm:"size:32;index;not null"`
	Status     string         `gorm:"size:32;index;not null"`
	Model      string         `gorm:"size:255;index"`
	Provider   string         `gorm:"size:100;index"`
	Prompt     string         `gorm:"type:text"`
	Ratio      string         `gorm:"size:32"`
	Resolution string         `gorm:"size:32"`
	Duration   string         `gorm:"size:32"`
	Refs       int            `gorm:"not null;default:0"`
	DeAI       bool           `gorm:"not null;default:false"` // 去AI特征 was applied (image only)
	RefFiles   datatypes.JSON `gorm:"type:jsonb"`             // relative paths of saved reference images, for回显 on reload
	Source     string         `gorm:"size:32;index"`
	// AccountID is the channel chosen to fulfil this generation, stamped when
	// the upstream call begins. (Field name kept from the pre-channel schema.)
	AccountID string `gorm:"size:64;index"`
	// AccountEmail denormalizes the channel's display name at stamp time, so log
	// rows keep showing which channel fulfilled the generation even after the
	// channel is deleted or renamed.
	AccountEmail string `gorm:"size:255"`
	// UpstreamJob is the job id assigned by the upstream vivid instance (from
	// the NDJSON stream's jobId field) — kept for cross-instance debugging.
	UpstreamJob string  `gorm:"size:64"`
	UserID      string  `gorm:"size:32;index"`
	Cost        float64 `gorm:"not null;default:0"`
	// Refunded marks that this event's up-front charge has already been credited
	// back, so the normal failure path and the abandoned-purge sweep can never
	// double-refund the same generation.
	Refunded  bool   `gorm:"not null;default:false"`
	ElapsedMS int    `gorm:"not null;default:0"`
	File      string `gorm:"size:500;index"`
	Error     string `gorm:"type:text"`
	CreatedAt time.Time
	UpdatedAt time.Time
}

type ModelConfig struct {
	ID             string            `gorm:"primaryKey;size:255"`
	Type           string            `gorm:"size:32;index;not null"`
	Name           string            `gorm:"size:255;not null"`
	Alias          string            `gorm:"column:alias;size:255;not null;default:''"`
	Provider       string            `gorm:"size:100;index;not null"`
	FreeAllowed    bool              `gorm:"not null;default:false"` // 普号(free)能否调度此模型，默认不可用
	Ratios         datatypes.JSON    `gorm:"type:jsonb"`
	Prices         datatypes.JSONMap `gorm:"type:jsonb"`
	Resolutions    datatypes.JSON    `gorm:"type:jsonb"`
	ImageToImage   bool              `gorm:"not null;default:false"`
	DurationPrices datatypes.JSONMap `gorm:"type:jsonb"`
	// Agent (代理) pricing — optional overlay over Prices/DurationPrices. A tier
	// left unset here means agent users pay the normal price for that tier; the
	// set of *supported* tiers is always driven by Prices, not these.
	PricesAgent         datatypes.JSONMap `gorm:"type:jsonb;column:prices_agent"`
	DurationPricesAgent datatypes.JSONMap `gorm:"type:jsonb;column:duration_prices_agent"`
	Durations           datatypes.JSON    `gorm:"type:jsonb"`
	// DurationMin/DurationMax bound a free-form duration (seconds) for models
	// whose duration spec is a range rather than discrete options. 0 = unset.
	DurationMin        int `gorm:"not null;default:0"`
	DurationMax        int `gorm:"not null;default:0"`
	MaxReferenceImages int `gorm:"not null;default:0"`
	// Per-kind reference caps for upstreams that accept video/audio refs.
	// 0 = that kind is not accepted.
	MaxReferenceVideos int `gorm:"not null;default:0"`
	MaxReferenceAudios int `gorm:"not null;default:0"`
	// MaxRefVideoSeconds/MaxRefAudioSeconds cap the combined duration of
	// reference videos/audios. 0 = unlimited.
	MaxRefVideoSeconds int    `gorm:"not null;default:0"`
	MaxRefAudioSeconds int    `gorm:"not null;default:0"`
	ReferenceMode      string `gorm:"size:32;not null;default:'none'"`
	// Weight controls display order in the model dropdown / admin list: higher
	// weight floats to the top (matches ShowcaseItem.Weight semantics). Ties fall
	// back to created_at desc. Default 0.
	Weight int `gorm:"not null;default:0;index"`
	// GenerationCount is a persistent success counter, incremented once per
	// successful generation. Independent of the event_log (which is subject to
	// retention / manual clearing), so the admin "次数" is a true running total.
	GenerationCount int64 `gorm:"not null;default:0"`
	// DeletedAt soft-deletes the row (vivid parity): hidden from every normal
	// path, but the row + its counters survive so a re-import revives it
	// without losing generation_count or pricing.
	DeletedAt gorm.DeletedAt `gorm:"index"`
	CreatedAt time.Time
	UpdatedAt time.Time
}

func (m ModelConfig) EffectiveName() string {
	if strings.TrimSpace(m.Alias) != "" {
		return strings.TrimSpace(m.Alias)
	}
	return m.ID
}

type CDKCode struct {
	Code       string  `gorm:"primaryKey;size:32"`
	Amount     int     `gorm:"not null"`
	Status     string  `gorm:"size:32;index;not null"`
	Type       string  `gorm:"size:16;not null;default:normal;index"` // normal | marketing
	BatchID    string  `gorm:"size:32;index"`                         // groups one generate call
	Note       string  `gorm:"type:text"`
	RedeemedBy *string `gorm:"size:32;index"`
	RedeemedAt *time.Time
	CreatedAt  time.Time
	UpdatedAt  time.Time
}

// Channel is one upstream vivid-protocol instance this gateway routes
// generation to. Replaces the old per-provider token account pool: a channel
// is just a base_url + api_key plus routing knobs (enabled/weight/concurrency)
// and local usage counters. ApiKey is stored AES-GCM encrypted.
type Channel struct {
	ID        string `gorm:"primaryKey;size:40"`
	Name      string `gorm:"size:255;not null"`
	BaseURL   string `gorm:"size:500;not null"`
	APIKeyEnc string `gorm:"type:text;not null"` // AES-GCM encrypted upstream API key
	Enabled   bool   `gorm:"not null;default:true;index"`
	// Concurrency caps simultaneous in-flight jobs on this channel. 0 = unlimited.
	Concurrency int `gorm:"not null;default:0"`
	// Weight biases weighted-random channel order: weight 2 is picked first at
	// roughly 2x the rate of weight 1.
	Weight       int     `gorm:"not null;default:1"`
	SuccessTotal int64   `gorm:"not null;default:0"` // locally-tracked successful generations
	UsedCredits  float64 `gorm:"not null;default:0"` // upstream credits spent (reported by the upstream)
	LastUsedAt   *time.Time
	CreatedAt    time.Time
	UpdatedAt    time.Time
}

// ChannelModel binds a local model_configs row to a channel and records the
// upstream model name to send on the wire (the local row's alias stays the
// user-facing name).
type ChannelModel struct {
	ChannelID     string `gorm:"primaryKey;size:40"`
	ModelID       string `gorm:"primaryKey;size:255;index"`
	UpstreamModel string `gorm:"size:255;not null"`
	CreatedAt     time.Time
	UpdatedAt     time.Time
}

type SiteSetting struct {
	Key       string `gorm:"primaryKey;size:100"`
	Value     string `gorm:"type:text"`
	CreatedAt time.Time
	UpdatedAt time.Time
}

func AutoMigrateModels() []any {
	return []any{
		&User{},
		&BannedWord{},
		&BannedWordHit{},
		&APIKey{},
		&ShowcaseItem{},
		&EventLog{},
		&ModelConfig{},
		&CDKCode{},
		&Channel{},
		&ChannelModel{},
		&SiteSetting{},
		&StatCounter{},
		&ConcurrencyGroup{},
		&Order{},
		&Canvas{},
	}
}

// Order is a points-recharge order paid via 易支付 (epay). ID is our merchant
// order number (out_trade_no). Status: pending | paid | cancelled. Unpaid orders
// auto-cancel 30 min after creation (ExpiresAt). Besides epay recharges, the
// table also records credit grants from admin manual adjustments (source=admin)
// and CDK redemptions (source=cdk) as already-paid rows, so 订单管理 shows the
// full credit history in one place.
type Order struct {
	ID          string    `gorm:"primaryKey;size:40"`
	UserID      string    `gorm:"size:32;index;not null"`
	Amount      float64   `gorm:"not null"`                              // 充值金额(元)
	Points      int       `gorm:"not null"`                              // 到账积分
	PayType     string    `gorm:"size:16"`                               // wxpay | alipay | admin | cdk
	Status      string    `gorm:"size:16;index;not null"`                // pending | paid | cancelled
	Source      string    `gorm:"size:16;index;not null;default:'epay'"` // epay | admin | cdk
	Remark      string    `gorm:"type:text"`                             // e.g. 兑换码 code / 管理员操作说明
	TradeNo     string    `gorm:"size:64;index"`                         // 易支付平台订单号
	PayInfo     string    `gorm:"type:text"`                             // 二维码 url / 跳转 url
	PayInfoType string    `gorm:"size:16"`                               // qrcode | jump | html | ...
	ExpiresAt   time.Time `gorm:"index"`
	PaidAt      *time.Time
	CreatedAt   time.Time
	UpdatedAt   time.Time
}

// ConcurrencyGroup caps how many generations a member user may run AT ONCE
// (across their API key + 画图台). MaxConcurrency 0 = unlimited. Exactly one
// group is IsDefault — new users are bound to it and it can't be deleted.
type ConcurrencyGroup struct {
	ID             string `gorm:"primaryKey;size:32"`
	Name           string `gorm:"size:100;not null"`
	MaxConcurrency int    `gorm:"not null;default:10"` // 0 = 不限制
	IsDefault      bool   `gorm:"not null;default:false;index"`
	CreatedAt      time.Time
	UpdatedAt      time.Time
}

// Canvas is one user's infinite-canvas document. Data stores the whole
// node/edge graph as a versioned JSON blob; saves are whole-document
// replacements (last write wins), which matches the single-editor frontend.
type Canvas struct {
	ID        string `gorm:"primaryKey;size:40"`
	UserID    string `gorm:"size:32;index;not null"`
	Title     string `gorm:"size:120;not null;default:'未命名画布'"`
	Data      string `gorm:"type:text"`
	CreatedAt time.Time
	UpdatedAt time.Time `gorm:"index"`
}

// StatCounter is a persistent monotonic counter (key → value), independent of the
// event_log (which is retention-pruned / clearable). Used for the dashboard
// cumulative cards (total/success/failed/image/video/api) so they never reset.
type StatCounter struct {
	Key       string `gorm:"primaryKey;size:64"`
	Value     int64  `gorm:"not null;default:0"`
	UpdatedAt time.Time
}