package ground_spawn

import (
	"fmt"

	"eq2emu/internal/common"
	"eq2emu/internal/database"
	"zombiezen.com/go/sqlite"
)

// MasterList manages all ground spawns using the generic base
type MasterList struct {
	*common.MasterList[int32, *GroundSpawn]
}

// NewMasterList creates a new ground spawn master list
func NewMasterList() *MasterList {
	return &MasterList{
		MasterList: common.NewMasterList[int32, *GroundSpawn](),
	}
}

// AddGroundSpawn adds a ground spawn to the master list
func (ml *MasterList) AddGroundSpawn(gs *GroundSpawn) bool {
	return ml.MasterList.Add(gs)
}

// GetGroundSpawn retrieves a ground spawn by ID
func (ml *MasterList) GetGroundSpawn(groundSpawnID int32) *GroundSpawn {
	return ml.MasterList.Get(groundSpawnID)
}

// RemoveGroundSpawn removes a ground spawn by ID
func (ml *MasterList) RemoveGroundSpawn(groundSpawnID int32) bool {
	return ml.MasterList.Remove(groundSpawnID)
}

// GetByZone returns all ground spawns in a specific zone
func (ml *MasterList) GetByZone(zoneID int32) []*GroundSpawn {
	return ml.MasterList.Filter(func(gs *GroundSpawn) bool {
		return gs.ZoneID == zoneID
	})
}

// GetBySkill returns all ground spawns that require a specific skill
func (ml *MasterList) GetBySkill(skill string) []*GroundSpawn {
	return ml.MasterList.Filter(func(gs *GroundSpawn) bool {
		return gs.CollectionSkill == skill
	})
}

// GetAvailableSpawns returns all harvestable ground spawns
func (ml *MasterList) GetAvailableSpawns() []*GroundSpawn {
	return ml.MasterList.Filter(func(gs *GroundSpawn) bool {
		return gs.IsAvailable()
	})
}

// GetDepletedSpawns returns all depleted ground spawns
func (ml *MasterList) GetDepletedSpawns() []*GroundSpawn {
	return ml.MasterList.Filter(func(gs *GroundSpawn) bool {
		return gs.IsDepleted()
	})
}

// LoadFromDatabase loads all ground spawns from database
func (ml *MasterList) LoadFromDatabase(db *database.Database) error {
	if db.GetType() == database.SQLite {
		return ml.loadFromSQLite(db)
	}
	return ml.loadFromMySQL(db)
}

func (ml *MasterList) loadFromSQLite(db *database.Database) error {
	return db.ExecTransient(`
		SELECT id, groundspawn_id, name, collection_skill, number_harvests, 
		       attempts_per_harvest, randomize_heading, respawn_time,
		       x, y, z, heading, zone_id, grid_id
		FROM ground_spawns
		ORDER BY groundspawn_id
	`, func(stmt *sqlite.Stmt) error {
		gs := &GroundSpawn{
			ID:                stmt.ColumnInt32(0),
			GroundSpawnID:     stmt.ColumnInt32(1),
			Name:              stmt.ColumnText(2),
			CollectionSkill:   stmt.ColumnText(3),
			NumberHarvests:    int8(stmt.ColumnInt32(4)),
			AttemptsPerHarvest: int8(stmt.ColumnInt32(5)),
			RandomizeHeading:  stmt.ColumnBool(6),
			RespawnTime:       stmt.ColumnInt32(7),
			X:                 float32(stmt.ColumnFloat(8)),
			Y:                 float32(stmt.ColumnFloat(9)),
			Z:                 float32(stmt.ColumnFloat(10)),
			Heading:           float32(stmt.ColumnFloat(11)),
			ZoneID:            stmt.ColumnInt32(12),
			GridID:            stmt.ColumnInt32(13),
			db:                db,
			isNew:             false,
			IsAlive:           true,
			CurrentHarvests:   int8(stmt.ColumnInt32(4)), // Initialize to max harvests
			HarvestEntries:    make([]*HarvestEntry, 0),
			HarvestItems:      make([]*HarvestEntryItem, 0),
		}

		// Load harvest data for this ground spawn
		if err := gs.loadHarvestData(); err != nil {
			return fmt.Errorf("failed to load harvest data for ground spawn %d: %w", gs.GroundSpawnID, err)
		}

		ml.MasterList.Add(gs)
		return nil
	})
}

func (ml *MasterList) loadFromMySQL(db *database.Database) error {
	rows, err := db.Query(`
		SELECT id, groundspawn_id, name, collection_skill, number_harvests, 
		       attempts_per_harvest, randomize_heading, respawn_time,
		       x, y, z, heading, zone_id, grid_id
		FROM ground_spawns
		ORDER BY groundspawn_id
	`)
	if err != nil {
		return fmt.Errorf("failed to query ground spawns: %w", err)
	}
	defer rows.Close()

	for rows.Next() {
		gs := &GroundSpawn{
			db:             db,
			isNew:          false,
			IsAlive:        true,
			HarvestEntries: make([]*HarvestEntry, 0),
			HarvestItems:   make([]*HarvestEntryItem, 0),
		}

		err := rows.Scan(&gs.ID, &gs.GroundSpawnID, &gs.Name, &gs.CollectionSkill,
			&gs.NumberHarvests, &gs.AttemptsPerHarvest, &gs.RandomizeHeading, 
			&gs.RespawnTime, &gs.X, &gs.Y, &gs.Z, &gs.Heading, &gs.ZoneID, &gs.GridID)
		if err != nil {
			return fmt.Errorf("failed to scan ground spawn: %w", err)
		}

		// Initialize current harvests to max
		gs.CurrentHarvests = gs.NumberHarvests

		// Load harvest data for this ground spawn
		if err := gs.loadHarvestData(); err != nil {
			return fmt.Errorf("failed to load harvest data for ground spawn %d: %w", gs.GroundSpawnID, err)
		}

		ml.MasterList.Add(gs)
	}

	return rows.Err()
}

// GetStatistics returns statistics about the ground spawn system
func (ml *MasterList) GetStatistics() *Statistics {
	availableSpawns := len(ml.GetAvailableSpawns())
	
	// Count by zone
	zoneMap := make(map[int32]int)
	skillMap := make(map[string]int64)
	
	ml.MasterList.ForEach(func(id int32, gs *GroundSpawn) {
		zoneMap[gs.ZoneID]++
		skillMap[gs.CollectionSkill]++
	})

	return &Statistics{
		TotalHarvests:      0, // Would need to be tracked separately
		SuccessfulHarvests: 0, // Would need to be tracked separately
		RareItemsHarvested: 0, // Would need to be tracked separately
		SkillUpsGenerated:  0, // Would need to be tracked separately
		HarvestsBySkill:    skillMap,
		ActiveGroundSpawns: availableSpawns,
		GroundSpawnsByZone: zoneMap,
	}
}