package com.bigcrunch.ads.models

import com.bigcrunch.ads.core.DeviceContextData
import com.squareup.moshi.Json
import com.squareup.moshi.JsonClass
import java.util.UUID

// MARK: - Legacy Event (keeping for backward compatibility)

/**
 * Analytics event sent to BigCrunch backend
 *
 * All ad-related events (impressions, clicks, revenue) are tracked and sent
 * to the analytics endpoint in this format.
 */
@JsonClass(generateAdapter = true)
internal data class AdEvent(
    @Json(name = "eventType")
    val eventType: String, // "screen_view", "ad_request", "ad_impression", "ad_revenue", "ad_click", "ad_viewable"

    @Json(name = "placementId")
    val placementId: String? = null,

    @Json(name = "format")
    val format: String? = null, // "banner", "interstitial", "rewarded"

    @Json(name = "timestamp")
    val timestamp: Long = System.currentTimeMillis(),

    @Json(name = "sessionId")
    val sessionId: String,

    @Json(name = "deviceInfo")
    val deviceInfo: DeviceInfo,

    @Json(name = "revenue")
    val revenue: RevenueData? = null
)

/**
 * Device and app information included with every event
 */
@JsonClass(generateAdapter = true)
internal data class DeviceInfo(
    @Json(name = "platform")
    val platform: String = "android",

    @Json(name = "osVersion")
    val osVersion: String,

    @Json(name = "appVersion")
    val appVersion: String,

    @Json(name = "deviceId")
    val deviceId: String
)

/**
 * Revenue data from ILRD (Impression-Level Revenue Data)
 *
 * Only present in ad_revenue events. Values are in micros (1/1,000,000 of currency unit).
 */
@JsonClass(generateAdapter = true)
internal data class RevenueData(
    @Json(name = "valueMicros")
    val valueMicros: Long,

    @Json(name = "currency")
    val currency: String
)

// MARK: - Screen View Options

/**
 * Options for customizing screen view tracking
 *
 * Allows app developers to provide page URL, content metadata,
 * and custom dimensions for analytics events.
 */
data class ScreenViewOptions(
    /** Override the auto-generated page URL (must be a valid URL) */
    val pageUrl: String? = null,

    /** Content metadata for this screen/page */
    val pageMeta: PageMetaData? = null,

    /** Custom key-value dimensions attached to analytics events */
    val customDimensions: Map<String, String>? = null
)

/**
 * Content metadata for a screen/page view
 *
 * Matches the `page_meta_data` fields in the analytics schema.
 */
@JsonClass(generateAdapter = true)
data class PageMetaData(
    /** Canonical page URL */
    @Json(name = "url")
    val url: String? = null,

    /** Content author */
    @Json(name = "author")
    val author: String? = null,

    /** Page/screen title */
    @Json(name = "title")
    val title: String? = null,

    /** Featured image URL */
    @Json(name = "thumbnailUrl")
    val thumbnailUrl: String? = null,

    /** Content section/category */
    @Json(name = "articleSection")
    val articleSection: String? = null,

    /** Comma-separated keywords */
    @Json(name = "keywords")
    val keywords: String? = null,

    /** Content creation date (ISO 8601) */
    @Json(name = "dateCreated")
    val dateCreated: String? = null,

    /** Content last modified date (ISO 8601) */
    @Json(name = "dateModified")
    val dateModified: String? = null,

    /** Content publication date (ISO 8601) */
    @Json(name = "datePublished")
    val datePublished: String? = null
)

// MARK: - Enhanced Analytics Events (matching web SDK data model)

/**
 * Screen/Page view event - matches `/pageviews` endpoint
 *
 * Sent when a new screen is viewed. Contains session context and device info.
 */
@JsonClass(generateAdapter = true)
internal data class PageViewEvent(
    // Web schema common fields
    @Json(name = "payload_version")
    val payloadVersion: String,

    @Json(name = "config_version")
    val configVersion: Int = 1,

    @Json(name = "browser_timestamp")
    val browserTimestamp: String,  // ISO 8601

    // Session/user context
    @Json(name = "session_id")
    val sessionId: String,

    @Json(name = "user_id")
    val userId: String,

    @Json(name = "property_id")
    val propertyId: String,

    @Json(name = "new_user")
    val newUser: Boolean,

    // Page context
    @Json(name = "page_id")
    val pageId: String,

    @Json(name = "session_depth")
    val sessionDepth: Int,

    @Json(name = "page_url")
    val pageUrl: String,

    @Json(name = "page_search")
    val pageSearch: String = "",

    @Json(name = "page_referrer")
    val pageReferrer: String = "",

    // Device context (flattened)
    @Json(name = "browser")
    val browser: String,

    @Json(name = "device")
    val device: String,

    @Json(name = "os")
    val os: String,

    @Json(name = "country")
    val country: String,

    @Json(name = "region")
    val region: String,

    // Attribution
    @Json(name = "session_source")
    val sessionSource: String,

    @Json(name = "session_medium")
    val sessionMedium: String,

    @Json(name = "utm_source")
    val utmSource: String = "",

    @Json(name = "utm_medium")
    val utmMedium: String = "",

    @Json(name = "utm_campaign")
    val utmCampaign: String = "",

    @Json(name = "utm_term")
    val utmTerm: String = "",

    @Json(name = "utm_content")
    val utmContent: String = "",

    // Click IDs for attribution
    @Json(name = "gclid")
    val gclid: String = "",

    @Json(name = "fbclid")
    val fbclid: String = "",

    // Account & Identity
    @Json(name = "acct_type")
    val acctType: String = "anonymous",

    @Json(name = "dii_source")
    val diiSource: String = "",

    // Ad platform IDs
    @Json(name = "gam_network_code")
    val gamNetworkCode: String = "",

    @Json(name = "amzn_pub_id")
    val amznPubId: String = "",

    // Custom dimensions
    @Json(name = "custom_dimensions")
    val customDimensions: Map<String, String> = emptyMap(),

    // Page metadata (only for pageview events)
    @Json(name = "page_meta_data")
    val pageMetaData: PageMetaData? = null
)

/**
 * Individual impression record - nested inside ImpressionBatchEvent
 *
 * Represents a single ad impression with auction/bid data.
 * All string fields default to empty string to ensure they're serialized (server requires all fields).
 */
@JsonClass(generateAdapter = true)
internal data class ImpressionRecord(
    /** Placement identifier (slot_id in web SDK) */
    @Json(name = "slot_id")
    val slotId: String,

    /** GAM ad unit path */
    @Json(name = "gam_unit")
    val gamUnit: String,

    /** GAM price bucket */
    @Json(name = "gam_price_bucket")
    val gamPriceBucket: String = "",

    /** Unique identifier for this impression */
    @Json(name = "impression_id")
    val impressionId: String,

    /** Auction ID (from Prebid) */
    @Json(name = "auction_id")
    val auctionId: String = "",

    /** Refresh count for this placement */
    @Json(name = "refresh_count")
    val refreshCount: Int = 0,

    /** Winning bidder name */
    @Json(name = "ad_bidder")
    val adBidder: String = "",

    /** Ad size (e.g., "320x50") */
    @Json(name = "ad_size")
    val adSize: String = "",

    /** Bid price/revenue in CPM */
    @Json(name = "ad_price")
    val adPrice: Double = 0.0,

    /** Floor price */
    @Json(name = "ad_floor_price")
    val adFloorPrice: Double = 0.0,

    /** Minimum bid to win */
    @Json(name = "min_bid_to_win")
    val minBidToWin: Double = 0.0,

    /** Advertiser ID from GAM */
    @Json(name = "advertiser_id")
    val advertiserId: String = "",

    /** Campaign ID from GAM */
    @Json(name = "campaign_id")
    val campaignId: String = "",

    /** Line item ID from GAM */
    @Json(name = "line_item_id")
    val lineItemId: String = "",

    /** Creative ID from GAM response */
    @Json(name = "creative_id")
    val creativeId: String = "",

    /** Amazon bid data (if applicable) */
    @Json(name = "ad_amznbid")
    val adAmznbid: String = "",

    /** Amazon price data (if applicable) */
    @Json(name = "ad_amznp")
    val adAmznp: String = "",

    /** Demand type (banner, video, etc.) */
    @Json(name = "ad_demand_type")
    val adDemandType: String = "",

    /** Demand channel (e.g., "Prebid Header", "GAM Direct") */
    @Json(name = "demand_channel")
    val demandChannel: String = "",

    /** Slot-level custom dimensions */
    @Json(name = "custom_dimensions")
    val customDimensions: Map<String, String> = emptyMap()
)

/**
 * Impression batch event - matches `/impressions` endpoint
 *
 * Contains session/page context with nested array of impression records.
 * This matches the web SDK format where impressions are batched with pageview context.
 */
@JsonClass(generateAdapter = true)
internal data class ImpressionBatchEvent(
    // Web schema common fields
    @Json(name = "payload_version")
    val payloadVersion: String,

    @Json(name = "config_version")
    val configVersion: Int = 1,

    @Json(name = "browser_timestamp")
    val browserTimestamp: String,  // ISO 8601

    // Session/user context
    @Json(name = "session_id")
    val sessionId: String,

    @Json(name = "user_id")
    val userId: String,

    @Json(name = "property_id")
    val propertyId: String,

    @Json(name = "new_user")
    val newUser: Boolean,

    @Json(name = "page_id")
    val pageId: String,

    @Json(name = "session_depth")
    val sessionDepth: Int,

    @Json(name = "page_url")
    val pageUrl: String = "",

    @Json(name = "page_search")
    val pageSearch: String = "",

    @Json(name = "page_referrer")
    val pageReferrer: String = "",

    // Device context (flattened)
    @Json(name = "browser")
    val browser: String,

    @Json(name = "device")
    val device: String,

    @Json(name = "os")
    val os: String,

    @Json(name = "country")
    val country: String,

    @Json(name = "region")
    val region: String,

    // Attribution
    @Json(name = "session_source")
    val sessionSource: String,

    @Json(name = "session_medium")
    val sessionMedium: String,

    @Json(name = "utm_source")
    val utmSource: String = "",

    @Json(name = "utm_medium")
    val utmMedium: String = "",

    @Json(name = "utm_campaign")
    val utmCampaign: String = "",

    @Json(name = "utm_term")
    val utmTerm: String = "",

    @Json(name = "utm_content")
    val utmContent: String = "",

    // Click IDs for attribution
    @Json(name = "gclid")
    val gclid: String = "",

    @Json(name = "fbclid")
    val fbclid: String = "",

    // Account & Identity
    @Json(name = "acct_type")
    val acctType: String = "anonymous",

    @Json(name = "dii_source")
    val diiSource: String = "",

    // Ad platform IDs
    @Json(name = "gam_network_code")
    val gamNetworkCode: String = "",

    @Json(name = "amzn_pub_id")
    val amznPubId: String = "",

    // Custom dimensions
    @Json(name = "custom_dimensions")
    val customDimensions: Map<String, String> = emptyMap(),

    // Nested impressions array
    @Json(name = "impressions")
    val impressions: List<ImpressionRecord>
)

/**
 * Ad click event - matches `/clicks` endpoint
 *
 * Sent when a user clicks on an ad.
 */
@JsonClass(generateAdapter = true)
internal data class ClickEvent(
    // Web schema common fields
    @Json(name = "payload_version")
    val payloadVersion: String,

    @Json(name = "config_version")
    val configVersion: Int = 1,

    @Json(name = "browser_timestamp")
    val browserTimestamp: String,  // ISO 8601

    // Session/user context
    @Json(name = "session_id")
    val sessionId: String,

    @Json(name = "user_id")
    val userId: String,

    @Json(name = "property_id")
    val propertyId: String,

    @Json(name = "new_user")
    val newUser: Boolean,

    @Json(name = "page_id")
    val pageId: String,

    @Json(name = "session_depth")
    val sessionDepth: Int,

    @Json(name = "page_url")
    val pageUrl: String = "",

    @Json(name = "page_search")
    val pageSearch: String = "",

    @Json(name = "page_referrer")
    val pageReferrer: String = "",

    // Device context (flattened)
    @Json(name = "browser")
    val browser: String,

    @Json(name = "device")
    val device: String,

    @Json(name = "os")
    val os: String,

    @Json(name = "country")
    val country: String,

    @Json(name = "region")
    val region: String,

    // Attribution
    @Json(name = "session_source")
    val sessionSource: String,

    @Json(name = "session_medium")
    val sessionMedium: String,

    @Json(name = "utm_source")
    val utmSource: String = "",

    @Json(name = "utm_medium")
    val utmMedium: String = "",

    @Json(name = "utm_campaign")
    val utmCampaign: String = "",

    @Json(name = "utm_term")
    val utmTerm: String = "",

    @Json(name = "utm_content")
    val utmContent: String = "",

    // Click IDs for attribution
    @Json(name = "gclid")
    val gclid: String = "",

    @Json(name = "fbclid")
    val fbclid: String = "",

    // Account & Identity
    @Json(name = "acct_type")
    val acctType: String = "anonymous",

    @Json(name = "dii_source")
    val diiSource: String = "",

    // Ad platform IDs
    @Json(name = "gam_network_code")
    val gamNetworkCode: String = "",

    @Json(name = "amzn_pub_id")
    val amznPubId: String = "",

    // Custom dimensions
    @Json(name = "custom_dimensions")
    val customDimensions: Map<String, String> = emptyMap(),

    // Click-specific fields (nested click object per schema)
    @Json(name = "click")
    val click: ClickData
)

/**
 * Click data object nested inside ClickEvent
 */
@JsonClass(generateAdapter = true)
internal data class ClickData(
    @Json(name = "click_id")
    val clickId: String,

    @Json(name = "slot_id")
    val slotId: String,

    @Json(name = "impression_id")
    val impressionId: String,

    @Json(name = "refresh_count")
    val refreshCount: Int = 0,

    @Json(name = "ad_amznp")
    val adAmznp: String = "",

    @Json(name = "ad_bidder")
    val adBidder: String = "",

    @Json(name = "ad_size")
    val adSize: String = "",

    @Json(name = "advertiser_id")
    val advertiserId: String = "",

    @Json(name = "campaign_id")
    val campaignId: String = "",

    @Json(name = "line_item_id")
    val lineItemId: String = "",

    @Json(name = "creative_id")
    val creativeId: String = "",

    @Json(name = "ad_demand_type")
    val adDemandType: String = "",

    @Json(name = "demand_channel")
    val demandChannel: String = "",

    /** Custom dimensions - values must be string arrays per backend schema */
    @Json(name = "custom_dimensions")
    val customDimensions: Map<String, List<String>> = emptyMap()
)

/**
 * Viewability event - matches `/viewability` endpoint
 *
 * Sent when an ad meets viewability thresholds (e.g., 50% visible for 1 second).
 */
@JsonClass(generateAdapter = true)
internal data class ViewabilityEvent(
    // Web schema common fields
    @Json(name = "payload_version")
    val payloadVersion: String,

    @Json(name = "config_version")
    val configVersion: Int = 1,

    @Json(name = "browser_timestamp")
    val browserTimestamp: String,  // ISO 8601

    // Session/user context
    @Json(name = "session_id")
    val sessionId: String,

    @Json(name = "user_id")
    val userId: String,

    @Json(name = "property_id")
    val propertyId: String,

    @Json(name = "new_user")
    val newUser: Boolean,

    @Json(name = "page_id")
    val pageId: String,

    @Json(name = "session_depth")
    val sessionDepth: Int,

    @Json(name = "page_url")
    val pageUrl: String = "",

    @Json(name = "page_search")
    val pageSearch: String = "",

    @Json(name = "page_referrer")
    val pageReferrer: String = "",

    // Device context (flattened)
    @Json(name = "browser")
    val browser: String,

    @Json(name = "device")
    val device: String,

    @Json(name = "os")
    val os: String,

    @Json(name = "country")
    val country: String,

    @Json(name = "region")
    val region: String,

    // Attribution
    @Json(name = "session_source")
    val sessionSource: String,

    @Json(name = "session_medium")
    val sessionMedium: String,

    @Json(name = "utm_source")
    val utmSource: String = "",

    @Json(name = "utm_medium")
    val utmMedium: String = "",

    @Json(name = "utm_campaign")
    val utmCampaign: String = "",

    @Json(name = "utm_term")
    val utmTerm: String = "",

    @Json(name = "utm_content")
    val utmContent: String = "",

    // Click IDs for attribution
    @Json(name = "gclid")
    val gclid: String = "",

    @Json(name = "fbclid")
    val fbclid: String = "",

    // Account & Identity
    @Json(name = "acct_type")
    val acctType: String = "anonymous",

    @Json(name = "dii_source")
    val diiSource: String = "",

    // Ad platform IDs
    @Json(name = "gam_network_code")
    val gamNetworkCode: String = "",

    @Json(name = "amzn_pub_id")
    val amznPubId: String = "",

    // Custom dimensions
    @Json(name = "custom_dimensions")
    val customDimensions: Map<String, String> = emptyMap(),

    // Viewability-specific fields (nested array per schema)
    @Json(name = "viewability")
    val viewability: List<ViewabilityData>
)

/**
 * Viewability data object nested inside ViewabilityEvent
 */
@JsonClass(generateAdapter = true)
internal data class ViewabilityData(
    @Json(name = "slot_id")
    val slotId: String,

    @Json(name = "impression_id")
    val impressionId: String,

    @Json(name = "refresh_count")
    val refreshCount: Int = 0,

    @Json(name = "ad_amznp")
    val adAmznp: String = "",

    @Json(name = "ad_bidder")
    val adBidder: String = "",

    @Json(name = "ad_size")
    val adSize: String = "",

    @Json(name = "advertiser_id")
    val advertiserId: String = "",

    @Json(name = "campaign_id")
    val campaignId: String = "",

    @Json(name = "line_item_id")
    val lineItemId: String = "",

    @Json(name = "creative_id")
    val creativeId: String = "",

    @Json(name = "ad_demand_type")
    val adDemandType: String = "",

    @Json(name = "demand_channel")
    val demandChannel: String = "",

    /** Custom dimensions - values must be string arrays per backend schema */
    @Json(name = "custom_dimensions")
    val customDimensions: Map<String, List<String>> = emptyMap()
)

/**
 * Engagement event - matches `/engagement` endpoint
 *
 * Tracks user engagement with content/screens.
 */
@JsonClass(generateAdapter = true)
internal data class EngagementEvent(
    // Web schema common fields
    @Json(name = "payload_version")
    val payloadVersion: String,

    @Json(name = "config_version")
    val configVersion: Int = 1,

    @Json(name = "browser_timestamp")
    val browserTimestamp: String,  // ISO 8601

    // Session/user context
    @Json(name = "session_id")
    val sessionId: String,

    @Json(name = "user_id")
    val userId: String,

    @Json(name = "property_id")
    val propertyId: String,

    @Json(name = "new_user")
    val newUser: Boolean,

    @Json(name = "page_id")
    val pageId: String,

    @Json(name = "session_depth")
    val sessionDepth: Int,

    @Json(name = "page_url")
    val pageUrl: String = "",

    @Json(name = "page_search")
    val pageSearch: String = "",

    @Json(name = "page_referrer")
    val pageReferrer: String = "",

    // Device context (flattened)
    @Json(name = "browser")
    val browser: String,

    @Json(name = "device")
    val device: String,

    @Json(name = "os")
    val os: String,

    @Json(name = "country")
    val country: String,

    @Json(name = "region")
    val region: String,

    // Attribution
    @Json(name = "session_source")
    val sessionSource: String,

    @Json(name = "session_medium")
    val sessionMedium: String,

    @Json(name = "utm_source")
    val utmSource: String = "",

    @Json(name = "utm_medium")
    val utmMedium: String = "",

    @Json(name = "utm_campaign")
    val utmCampaign: String = "",

    @Json(name = "utm_term")
    val utmTerm: String = "",

    @Json(name = "utm_content")
    val utmContent: String = "",

    // Click IDs for attribution
    @Json(name = "gclid")
    val gclid: String = "",

    @Json(name = "fbclid")
    val fbclid: String = "",

    // Account & Identity
    @Json(name = "acct_type")
    val acctType: String = "anonymous",

    @Json(name = "dii_source")
    val diiSource: String = "",

    // Ad platform IDs
    @Json(name = "gam_network_code")
    val gamNetworkCode: String = "",

    @Json(name = "amzn_pub_id")
    val amznPubId: String = "",

    /** Custom dimensions - values must be string arrays per backend schema */
    @Json(name = "custom_dimensions")
    val customDimensions: Map<String, List<String>> = emptyMap(),

    // Engagement-specific fields
    /** Time actively engaged in seconds */
    @Json(name = "engaged_time")
    val engagedTime: Int,

    /** Total time on page/screen in seconds */
    @Json(name = "time_on_page")
    val timeOnPage: Int,

    /** Maximum scroll depth percentage (0-100) */
    @Json(name = "scroll_depth")
    val scrollDepth: Int = 0
)

// MARK: - Auction Data

/**
 * Auction data from Prebid response
 *
 * Captures bidding information for analytics.
 */
internal data class AuctionData(
    /** Prebid auction ID */
    val auctionId: String? = null,

    /** Winning bidder name */
    val bidder: String? = null,

    /** Winning bid price in CPM */
    val bidPriceCpm: Double? = null,

    /** Creative ID from winning bid */
    val creativeId: String? = null,

    /** GAM price bucket (hb_pb value from targeting KVPs) */
    val gamPriceBucket: String? = null,

    /** Floor price sent to bidders */
    val floorPrice: Double? = null,

    /** Second-highest bid price (for computing min_bid_to_win) */
    val secondHighestBid: Double? = null,

    /** Demand channel ("S2S", "Google Ad Exchange", etc.) */
    val demandChannel: String? = null
) {
    companion object {
        val EMPTY = AuctionData()
    }
}

// MARK: - Impression Context

/**
 * Context for tracking an ad impression
 *
 * Aggregates all data needed to track an impression through its lifecycle.
 */
internal data class ImpressionContext(
    /** Unique impression identifier */
    val impressionId: String = UUID.randomUUID().toString(),

    /** Placement configuration */
    val placementId: String,
    /** UUID for backend reporting (slot_id) */
    val slotId: String,
    val gamAdUnit: String,
    val format: String,

    /** Size (for banners) */
    val width: Int? = null,
    val height: Int? = null,

    /** Auction data (populated after Prebid response) */
    var auctionData: AuctionData = AuctionData.EMPTY,

    /** Timestamp when impression was created */
    val createdAt: Long = System.currentTimeMillis()
)