package main

import (
	"net/http"
	"sort"
)

// GET /character-stats/{name} — latest full stats. Phase 1 reads the DB
// (character_stats is authoritative); the live_character_stats overlay is an
// ingest-only freshness layer we don't have yet. (main.py:4137)
func (s *Server) handleCharacterStats(w http.ResponseWriter, r *http.Request) {
	name := r.PathValue("name")
	// Live overlay first (ingest mode), like Python's live_character_stats check.
	if s.ingestor != nil {
		if v, ok := s.ingestor.getCharacterStats(name); ok {
			writeJSON(w, http.StatusOK, v)
			return
		}
	}
	ctx, cancel := reqCtx(r)
	defer cancel()

	row, err := queryRowAsMap(ctx, s.pool, `SELECT * FROM character_stats WHERE character_name = $1`, name)
	if err != nil {
		s.dbErr(w, "character-stats", err)
		return
	}
	if row == nil {
		writeJSON(w, http.StatusNotFound, map[string]any{"error": "No stats available for this character"})
		return
	}
	// Merge stats_data JSONB up to the top level, matching the frontend contract.
	sd := asJSONMap(row["stats_data"])
	delete(row, "stats_data")
	formatTimes([]map[string]any{row}, "timestamp")
	for k, v := range sd {
		row[k] = v
	}
	writeJSON(w, http.StatusOK, row)
}

// GET /combat-stats/{character_name} — lifetime combat blob. Phase 1: DB only,
// so session is always null. (main.py:1819)
func (s *Server) handleCombatStatsOne(w http.ResponseWriter, r *http.Request) {
	cn := r.PathValue("character_name")
	if s.ingestor != nil {
		if live, ok := s.ingestor.getCombatStats(cn); ok {
			writeJSON(w, http.StatusOK, map[string]any{
				"character_name": cn, "session": live["session"], "lifetime": live["lifetime"],
			})
			return
		}
	}
	ctx, cancel := reqCtx(r)
	defer cancel()

	row, err := queryRowAsMap(ctx, s.pool, `SELECT stats_data FROM combat_stats WHERE character_name = $1`, cn)
	if err != nil {
		s.dbErr(w, "combat-stats/one", err)
		return
	}
	if row == nil {
		writeJSON(w, http.StatusOK, map[string]any{"character_name": cn, "session": nil, "lifetime": nil})
		return
	}
	writeJSON(w, http.StatusOK, map[string]any{
		"character_name": cn,
		"session":        nil,
		"lifetime":       decodeJSONValue(row["stats_data"]),
	})
}

// GET /combat-stats — all characters' lifetime combat blobs. Phase 1: DB only. (main.py:1850)
func (s *Server) handleCombatStatsAll(w http.ResponseWriter, r *http.Request) {
	ctx, cancel := reqCtx(r)
	defer cancel()

	results := make([]map[string]any, 0)
	seen := map[string]bool{}
	if s.ingestor != nil { // live overlay first, like Python
		for char, live := range s.ingestor.allCombatStats() {
			seen[char] = true
			results = append(results, map[string]any{
				"character_name": char, "session": live["session"], "lifetime": live["lifetime"],
			})
		}
	}
	rows, err := queryRowsAsMaps(ctx, s.pool, `SELECT character_name, stats_data FROM combat_stats`)
	if err != nil {
		s.dbErr(w, "combat-stats/all", err)
		return
	}
	for _, row := range rows {
		if seen[toStr(row["character_name"])] {
			continue
		}
		results = append(results, map[string]any{
			"character_name": row["character_name"],
			"session":        nil,
			"lifetime":       decodeJSONValue(row["stats_data"]),
		})
	}
	sort.Slice(results, func(i, j int) bool {
		return toStr(results[i]["character_name"]) < toStr(results[j]["character_name"])
	})
	writeJSON(w, http.StatusOK, map[string]any{"stats": results})
}

func toStr(v any) string {
	if s, ok := v.(string); ok {
		return s
	}
	return ""
}