package main

import (
	"fmt"
	"strings"
)

// AnalyticsFilters represents the filter state for analytics queries
type AnalyticsFilters struct {
	KillHour            []uint8
	KillDayOfWeek       []uint8
	KillDate            []string
	Month               []string
	SolarSystemID       []int32
	RegionName          []string
	ConstellationName   []string
	SecurityStatus      []string
	VictimShipTypeID    []int32
	VictimShipGroupName []string
	VictimShipCategory  []string
	VictimCharacterName []string
	VictimCorporation   []string
	VictimAlliance      []string
	AttackerShipType    []string
	AttackerShipGroup   []string
	AttackerCharacter   []string
	AttackerCorporation []string
	AttackerAlliance    []string
	SlotType            []string
	HasModule           *ModuleFilter
}

type ModuleFilter struct {
	ModuleID int32
}

type FlatKillmailComplete struct {
	FlatKillmail
	Items []FlatKillmailItem `json:"items"`
}

// Time aggregation results
type TimeAggregationByHour struct {
	KillHour      uint8  `json:"kill_hour"`
	KillCount     uint64 `json:"kill_count"`
	UniqueVictims uint64 `json:"unique_victims"`
	SystemsHit    uint64 `json:"systems_hit"`
}

type TimeAggregationByDay struct {
	KillDayOfWeek uint8  `json:"kill_day_of_week"`
	DayName       string `json:"day_name"`
	KillCount     uint64 `json:"kill_count"`
	UniqueVictims uint64 `json:"unique_victims"`
}

type TimeAggregationByDate struct {
	KillDate      string `json:"kill_date"`
	KillCount     uint64 `json:"kill_count"`
	UniqueVictims uint64 `json:"unique_victims"`
	SystemsHit    uint64 `json:"systems_hit"`
}

type TimeAggregationByMonth struct {
	Month         string `json:"month"`
	KillCount     uint64 `json:"kill_count"`
	UniqueVictims uint64 `json:"unique_victims"`
}

// Location aggregation results
type LocationAggregationBySystem struct {
	SolarSystemID   int32   `json:"solar_system_id"`
	SolarSystemName string  `json:"solar_system_name"`
	RegionName      string  `json:"region_name"`
	Security        float32 `json:"security"`
	KillCount       uint64  `json:"kill_count"`
	UniqueVictims   uint64  `json:"unique_victims"`
	ShipVariety     uint64  `json:"ship_variety"`
}

type LocationAggregationByRegion struct {
	RegionName       string `json:"region_name"`
	KillCount        uint64 `json:"kill_count"`
	SystemsWithKills uint64 `json:"systems_with_kills"`
	UniqueVictims    uint64 `json:"unique_victims"`
}

type LocationAggregationByConstellation struct {
	ConstellationName      string `json:"constellation_name"`
	RegionName             string `json:"region_name"`
	KillCount              uint64 `json:"kill_count"`
	SystemsInConstellation uint64 `json:"systems_in_constellation"`
}

type LocationAggregationBySecurity struct {
	SecStatus string `json:"sec_status"`
	KillCount uint64 `json:"kill_count"`
	Systems   uint64 `json:"systems"`
}

// Ship aggregation results
type ShipAggregationByVictimShip struct {
	ShipTypeID       int32  `json:"victim_ship_type_id"`
	ShipTypeName     string `json:"victim_ship_type_name"`
	ShipGroupName    string `json:"victim_ship_group_name"`
	ShipCategoryName string `json:"victim_ship_category_name"`
	KillCount        uint64 `json:"kill_count"`
	UniquePilots     uint64 `json:"unique_pilots_killed"`
}

type ShipAggregationByAttackerShip struct {
	ShipTypeName      string `json:"ship_type_name"`
	ShipGroupName     string `json:"ship_group_name"`
	TimesUsed         uint64 `json:"times_used"`
	KillsParticipated uint64 `json:"kills_participated"`
	TotalDamage       int64  `json:"total_damage"`
	FinalBlows        uint64 `json:"final_blows"`
}

// Player/Entity aggregation results
type PlayerAggregationByVictimCharacter struct {
	CharacterName string `json:"victim_character_name"`
	Corporation   string `json:"victim_corporation_name"`
	Alliance      string `json:"victim_alliance_name"`
	Deaths        uint64 `json:"deaths"`
	ShipsLost     uint64 `json:"ships_lost"`
}

type PlayerAggregationByVictimCorporation struct {
	Corporation   string `json:"victim_corporation_name"`
	Alliance      string `json:"victim_alliance_name"`
	Losses        uint64 `json:"losses"`
	MembersKilled uint64 `json:"members_killed"`
}

type PlayerAggregationByVictimAlliance struct {
	Alliance      string `json:"victim_alliance_name"`
	Losses        uint64 `json:"losses"`
	CorpsHit      uint64 `json:"corps_hit"`
	MembersKilled uint64 `json:"members_killed"`
}

type PlayerAggregationByAttackerCharacter struct {
	CharacterName     string `json:"character_name"`
	Corporation       string `json:"corporation_name"`
	Alliance          string `json:"alliance_name"`
	KillsParticipated uint64 `json:"kills_participated"`
	FinalBlows        uint64 `json:"final_blows"`
	TotalDamage       int64  `json:"total_damage"`
}

type PlayerAggregationByAttackerCorporation struct {
	Corporation       string `json:"corporation_name"`
	Alliance          string `json:"alliance_name"`
	KillsParticipated uint64 `json:"kills_participated"`
	MembersInvolved   uint64 `json:"members_involved"`
}

type PlayerAggregationByAttackerAlliance struct {
	Alliance          string `json:"alliance_name"`
	KillsParticipated uint64 `json:"kills_participated"`
	CorpsInvolved     uint64 `json:"corps_involved"`
	MembersInvolved   uint64 `json:"members_involved"`
}

// Module/Item aggregation results
type ModuleAggregationBySlotType struct {
	SlotType      string `json:"slot_type"`
	ItemsFitted   uint64 `json:"items_fitted"`
	ShipsWithSlot uint64 `json:"ships_with_slot"`
	ModuleVariety uint64 `json:"module_variety"`
}

type ModuleAggregationByModule struct {
	ItemTypeID       int32  `json:"item_type_id"`
	ItemTypeName     string `json:"item_type_name"`
	ItemGroupName    string `json:"item_group_name"`
	ItemCategoryName string `json:"item_category_name"`
	TimesFitted      uint64 `json:"times_fitted"`
	ShipsWithModule  uint64 `json:"ships_with_module"`
}

type ModuleCoOccurrence struct {
	ItemTypeName  string  `json:"item_type_name"`
	SlotType      string  `json:"slot_type"`
	TimesTogether uint64  `json:"times_fitted_together"`
	Percentage    float64 `json:"percentage"`
}

// buildWhereClause builds a WHERE clause from filters
func buildWhereClause(filters AnalyticsFilters) (string, []interface{}) {
	var conditions []string
	var args []interface{}

	if len(filters.KillHour) > 0 {
		placeholders := make([]string, len(filters.KillHour))
		for i := range placeholders {
			placeholders[i] = "?"
		}
		conditions = append(conditions, "kill_hour IN ("+strings.Join(placeholders, ",")+")")
		for _, h := range filters.KillHour {
			args = append(args, h)
		}
	}

	if len(filters.KillDayOfWeek) > 0 {
		placeholders := make([]string, len(filters.KillDayOfWeek))
		for i := range placeholders {
			placeholders[i] = "?"
		}
		conditions = append(conditions, "kill_day_of_week IN ("+strings.Join(placeholders, ",")+")")
		for _, d := range filters.KillDayOfWeek {
			args = append(args, d)
		}
	}

	if len(filters.KillDate) > 0 {
		placeholders := make([]string, len(filters.KillDate))
		for i := range placeholders {
			placeholders[i] = "?"
		}
		conditions = append(conditions, "kill_date IN ("+strings.Join(placeholders, ",")+")")
		for _, d := range filters.KillDate {
			args = append(args, d)
		}
	}

	if len(filters.Month) > 0 {
		placeholders := make([]string, len(filters.Month))
		for i := range placeholders {
			placeholders[i] = "?"
		}
		conditions = append(conditions, "toYYYYMM(killmail_time) IN ("+strings.Join(placeholders, ",")+")")
		for _, m := range filters.Month {
			args = append(args, m)
		}
	}

	if len(filters.SolarSystemID) > 0 {
		placeholders := make([]string, len(filters.SolarSystemID))
		for i := range placeholders {
			placeholders[i] = "?"
		}
		conditions = append(conditions, "solar_system_id IN ("+strings.Join(placeholders, ",")+")")
		for _, id := range filters.SolarSystemID {
			args = append(args, id)
		}
	}

	if len(filters.RegionName) > 0 {
		placeholders := make([]string, len(filters.RegionName))
		for i := range placeholders {
			placeholders[i] = "?"
		}
		conditions = append(conditions, "region_name IN ("+strings.Join(placeholders, ",")+")")
		for _, r := range filters.RegionName {
			args = append(args, r)
		}
	}

	if len(filters.ConstellationName) > 0 {
		placeholders := make([]string, len(filters.ConstellationName))
		for i := range placeholders {
			placeholders[i] = "?"
		}
		conditions = append(conditions, "constellation_name IN ("+strings.Join(placeholders, ",")+")")
		for _, c := range filters.ConstellationName {
			args = append(args, c)
		}
	}

	if len(filters.SecurityStatus) > 0 {
		var secConditions []string
		for _, s := range filters.SecurityStatus {
			switch s {
			case "High Sec":
				secConditions = append(secConditions, "security >= 0.5")
			case "Low Sec":
				secConditions = append(secConditions, "security > 0.0 AND security < 0.5")
			case "Null Sec":
				secConditions = append(secConditions, "security <= 0.0")
			}
		}
		if len(secConditions) > 0 {
			conditions = append(conditions, "("+strings.Join(secConditions, " OR ")+")")
		}
	}

	if len(filters.VictimShipTypeID) > 0 {
		placeholders := make([]string, len(filters.VictimShipTypeID))
		for i := range placeholders {
			placeholders[i] = "?"
		}
		conditions = append(conditions, "victim_ship_type_id IN ("+strings.Join(placeholders, ",")+")")
		for _, id := range filters.VictimShipTypeID {
			args = append(args, id)
		}
	}

	if len(filters.VictimShipGroupName) > 0 {
		placeholders := make([]string, len(filters.VictimShipGroupName))
		for i := range placeholders {
			placeholders[i] = "?"
		}
		conditions = append(conditions, "victim_ship_group_name IN ("+strings.Join(placeholders, ",")+")")
		for _, g := range filters.VictimShipGroupName {
			args = append(args, g)
		}
	}

	if len(filters.VictimShipCategory) > 0 {
		placeholders := make([]string, len(filters.VictimShipCategory))
		for i := range placeholders {
			placeholders[i] = "?"
		}
		conditions = append(conditions, "victim_ship_category_name IN ("+strings.Join(placeholders, ",")+")")
		for _, c := range filters.VictimShipCategory {
			args = append(args, c)
		}
	}

	if len(filters.VictimCharacterName) > 0 {
		placeholders := make([]string, len(filters.VictimCharacterName))
		for i := range placeholders {
			placeholders[i] = "?"
		}
		conditions = append(conditions, "victim_character_name IN ("+strings.Join(placeholders, ",")+")")
		for _, c := range filters.VictimCharacterName {
			args = append(args, c)
		}
	}

	if len(filters.VictimCorporation) > 0 {
		placeholders := make([]string, len(filters.VictimCorporation))
		for i := range placeholders {
			placeholders[i] = "?"
		}
		conditions = append(conditions, "victim_corporation_name IN ("+strings.Join(placeholders, ",")+")")
		for _, c := range filters.VictimCorporation {
			args = append(args, c)
		}
	}

	if len(filters.VictimAlliance) > 0 {
		placeholders := make([]string, len(filters.VictimAlliance))
		for i := range placeholders {
			placeholders[i] = "?"
		}
		conditions = append(conditions, "victim_alliance_name IN ("+strings.Join(placeholders, ",")+")")
		for _, a := range filters.VictimAlliance {
			args = append(args, a)
		}
	}

	if filters.HasModule != nil {
		subquery := `SELECT DISTINCT killmail_id FROM zkill.killmail_items WHERE item_type_id = ? AND slot_type != 'cargo'`
		conditions = append(conditions, fmt.Sprintf("killmail_id IN (%s)", subquery))
		args = append(args, filters.HasModule.ModuleID)
	}

	whereClause := ""
	if len(conditions) > 0 {
		whereClause = "WHERE " + strings.Join(conditions, " AND ")
	}

	return whereClause, args
}

// buildAttackerWhereClause builds WHERE clause for attacker queries
func buildAttackerWhereClause(filters AnalyticsFilters) (string, []interface{}) {
	var conditions []string
	var args []interface{}

	if len(filters.AttackerShipType) > 0 {
		placeholders := make([]string, len(filters.AttackerShipType))
		for i := range placeholders {
			placeholders[i] = "?"
		}
		conditions = append(conditions, "ship_type_name IN ("+strings.Join(placeholders, ",")+")")
		for _, s := range filters.AttackerShipType {
			args = append(args, s)
		}
	}

	if len(filters.AttackerShipGroup) > 0 {
		placeholders := make([]string, len(filters.AttackerShipGroup))
		for i := range placeholders {
			placeholders[i] = "?"
		}
		conditions = append(conditions, "ship_group_name IN ("+strings.Join(placeholders, ",")+")")
		for _, g := range filters.AttackerShipGroup {
			args = append(args, g)
		}
	}

	if len(filters.AttackerCharacter) > 0 {
		placeholders := make([]string, len(filters.AttackerCharacter))
		for i := range placeholders {
			placeholders[i] = "?"
		}
		conditions = append(conditions, "character_name IN ("+strings.Join(placeholders, ",")+")")
		for _, c := range filters.AttackerCharacter {
			args = append(args, c)
		}
	}

	if len(filters.AttackerCorporation) > 0 {
		placeholders := make([]string, len(filters.AttackerCorporation))
		for i := range placeholders {
			placeholders[i] = "?"
		}
		conditions = append(conditions, "corporation_name IN ("+strings.Join(placeholders, ",")+")")
		for _, c := range filters.AttackerCorporation {
			args = append(args, c)
		}
	}

	if len(filters.AttackerAlliance) > 0 {
		placeholders := make([]string, len(filters.AttackerAlliance))
		for i := range placeholders {
			placeholders[i] = "?"
		}
		conditions = append(conditions, "alliance_name IN ("+strings.Join(placeholders, ",")+")")
		for _, a := range filters.AttackerAlliance {
			args = append(args, a)
		}
	}

	whereClause := ""
	if len(conditions) > 0 {
		whereClause = "AND " + strings.Join(conditions, " AND ")
	}

	return whereClause, args
}

// getKillmailIDSubquery returns a subquery to filter by killmail_id from killmails table
func getKillmailIDSubquery(filters AnalyticsFilters) (string, []interface{}) {
	whereClause, args := buildWhereClause(filters)
	if whereClause == "" {
		return "(SELECT killmail_id FROM zkill.killmails)", args
	}
	return fmt.Sprintf("(SELECT killmail_id FROM zkill.killmails %s)", whereClause), args
}