//go:build llm_script

package main

import (
	"database/sql"
	"flag"
	"fmt"
	"html"
	"io"
	"net/http"
	"os"
	"regexp"
	"strings"
	"time"
)

const defaultLingyiwanwuPricingURL = "https://platform.lingyiwanwu.com/docs"

type lingyiwanwuPricingImportConfig struct {
	URL     string
	Fixture string
	DryRun  bool
	Timeout time.Duration
}

var lingyiwanwuPricingRowPattern = regexp.MustCompile(`(?s)"children":"(yi-[a-z0-9-]+)"\}\],\["\$","td",null,\{"children":"([0-9]+K)"\}.*?"children":"¥([0-9]+(?:\.[0-9]+)?)"`)

func main() {
	loadSubscriptionImportEnv()

	var url string
	var fixture string
	var dryRun bool
	var timeoutSeconds int

	flag.StringVar(&url, "url", defaultLingyiwanwuPricingURL, "零一万物官方价格页")
	flag.StringVar(&fixture, "fixture", "", "零一万物价格样例文件")
	flag.BoolVar(&dryRun, "dry-run", false, "仅解析并打印摘要，不写入数据库")
	flag.IntVar(&timeoutSeconds, "timeout", 20, "请求超时（秒）")
	flag.Parse()

	cfg := lingyiwanwuPricingImportConfig{URL: url, Fixture: fixture, DryRun: dryRun, Timeout: time.Duration(timeoutSeconds) * time.Second}

	var db *sql.DB
	var err error
	if !cfg.DryRun {
		db, err = subscriptionImportDB()
		if err != nil {
			fmt.Fprintf(os.Stderr, "open db: %v\n", err)
			os.Exit(1)
		}
		defer db.Close()
	}

	if err := runLingyiwanwuPricingImport(cfg, db, os.Stdout); err != nil {
		fmt.Fprintf(os.Stderr, "import_lingyiwanwu_pricing: %v\n", err)
		os.Exit(1)
	}
}

func runLingyiwanwuPricingImport(cfg lingyiwanwuPricingImportConfig, db *sql.DB, out io.Writer) error {
	client := &http.Client{Timeout: cfg.Timeout}
	raw, err := fetchRawPricingPage(cfg.URL, cfg.Fixture, client)
	if err != nil {
		return err
	}
	records, err := parseLingyiwanwuPricingCatalog(raw)
	if err != nil {
		return err
	}
	records = dedupeOfficialPricingRecords(records)
	if len(records) == 0 {
		return fmt.Errorf("unexpected lingyiwanwu pricing content: no records")
	}
	if cfg.DryRun {
		_, err = fmt.Fprintf(out, "source=lingyiwanwu-pricing-import models=%d operator=%s dry_run=true\n", len(records), records[0].OperatorName)
		return err
	}
	if db == nil {
		return fmt.Errorf("db is required when dry-run=false")
	}
	if err := upsertOfficialPricingRecords(db, records, "lingyiwanwu-pricing-import"); err != nil {
		return err
	}
	var tableRows int
	if err := db.QueryRow(`SELECT COUNT(*) FROM region_pricing`).Scan(&tableRows); err != nil {
		return fmt.Errorf("count region_pricing: %w", err)
	}
	_, err = fmt.Fprintf(out, "source=lingyiwanwu-pricing-import models=%d operator=%s table_rows=%d dry_run=false\n", len(records), records[0].OperatorName, tableRows)
	return err
}

func parseLingyiwanwuPricingCatalog(raw string) ([]officialPricingRecord, error) {
	payload := lingyiwanwuPricingPayload(raw)
	sectionStart := strings.Index(payload, "模型与计费")
	if sectionStart == -1 {
		return nil, fmt.Errorf("unexpected lingyiwanwu pricing content: missing 模型与计费")
	}
	payload = payload[sectionStart:]
	sectionEnd := strings.Index(payload, "关于计费")
	if sectionEnd == -1 {
		return nil, fmt.Errorf("unexpected lingyiwanwu pricing content: missing 关于计费")
	}
	section := payload[:sectionEnd]
	matches := lingyiwanwuPricingRowPattern.FindAllStringSubmatch(section, -1)
	if len(matches) == 0 {
		return nil, fmt.Errorf("unexpected lingyiwanwu pricing content: no model rows parsed")
	}

	providerNameCn, providerCountry, providerWebsite := providerMetadata("Yi")
	records := make([]officialPricingRecord, 0, len(matches))
	for _, match := range matches {
		if len(match) != 4 {
			continue
		}
		modelName := strings.TrimSpace(match[1])
		contextLength := parseContextLengthCommon(match[2])
		price := mustParseSubscriptionPrice(match[3])
		records = append(records, officialPricingRecord{
			ModelID:         normalizeExternalID("yi", modelName),
			ModelName:       modelName,
			ProviderName:    "Yi",
			ProviderNameCn:  providerNameCn,
			ProviderCountry: providerCountry,
			ProviderWebsite: providerWebsite,
			OperatorName:    "01.AI API",
			OperatorNameCn:  "零一万物开放平台",
			OperatorCountry: "CN",
			OperatorWebsite: defaultLingyiwanwuPricingURL,
			OperatorType:    "official",
			Region:          "CN",
			Currency:        "CNY",
			InputPrice:      price,
			OutputPrice:     price,
			ContextLength:   contextLength,
			SourceURL:       defaultLingyiwanwuPricingURL,
			ModelSourceURL:  defaultLingyiwanwuPricingURL,
			DateConfidence:  "unknown",
			DateSourceKind:  "official_pricing",
			Modality:        detectModality(modelName),
		})
	}
	if len(records) == 0 {
		return nil, fmt.Errorf("unexpected lingyiwanwu pricing content: empty records after parse")
	}
	return records, nil
}

func lingyiwanwuPricingPayload(raw string) string {
	text := html.UnescapeString(raw)
	text = strings.ReplaceAll(text, `\u003c`, "<")
	text = strings.ReplaceAll(text, `\u003e`, ">")
	text = strings.ReplaceAll(text, `\n`, "\n")
	text = strings.ReplaceAll(text, `\t`, " ")
	text = strings.ReplaceAll(text, `\"`, `"`)
	text = regexp.MustCompile(`(?is)<[^>]+>`).ReplaceAllString(text, " ")
	text = regexp.MustCompile(`[ \t]+`).ReplaceAllString(text, " ")
	return strings.TrimSpace(text)
}