package market

import (
	"encoding/json"
	"time"

	decimal "github.com/alpacahq/alpacadecimal"
	"s1d3sw1ped/robinhood-agentic-mcp/internal/wire"
)

func firstDec(vs ...any) (decimal.Decimal, error) {
	for _, v := range vs {
		if v == nil {
			continue
		}
		if s, ok := v.(string); ok && s == "" {
			continue
		}
		return wire.Dec(v)
	}
	return decimal.Zero, nil
}

func (r *IndexesResult) UnmarshalJSON(b []byte) error {
	type row struct {
		ID     string `json:"id"`
		Symbol string `json:"symbol"`
		Name   string `json:"name"`
	}
	rows, _, err := wire.UnmarshalRows[row](b, "indexes", "results")
	if err != nil {
		return err
	}
	r.Indexes = make([]Index, 0, len(rows))
	for _, row := range rows {
		r.Indexes = append(r.Indexes, Index{ID: row.ID, Symbol: row.Symbol, Name: row.Name})
	}
	return nil
}

func (r *IndexQuotesResult) UnmarshalJSON(b []byte) error {
	type row struct {
		InstrumentID string `json:"instrument_id"`
		ID           string `json:"id"`
		Value        any    `json:"value"`
		Last         any    `json:"last"`
		State        string `json:"state"`
	}
	rows, _, err := wire.UnmarshalRows[row](b, "quotes", "results")
	if err != nil {
		return err
	}
	r.Quotes = make([]IndexQuote, 0, len(rows))
	for _, row := range rows {
		id := row.InstrumentID
		if id == "" {
			id = row.ID
		}
		val, err := firstDec(row.Value, row.Last)
		if err != nil {
			return err
		}
		r.Quotes = append(r.Quotes, IndexQuote{InstrumentID: id, Value: val, State: row.State})
	}
	return nil
}

func (r *IndexHistoricalsResult) UnmarshalJSON(b []byte) error {
	type pt struct {
		BeginsAt     string `json:"begins_at"`
		Open         any    `json:"open"`
		High         any    `json:"high"`
		Low          any    `json:"low"`
		Close        any    `json:"close"`
		Interpolated bool   `json:"interpolated"`
	}
	type series struct {
		InstrumentID string `json:"instrument_id"`
		ID           string `json:"id"`
		DataPoints   []pt   `json:"data_points"`
	}
	rows, _, err := wire.UnmarshalRows[series](b, "historicals", "results")
	if err != nil {
		return err
	}
	for _, s := range rows {
		id := s.InstrumentID
		if id == "" {
			id = s.ID
		}
		for _, p := range s.DataPoints {
			ts, err := time.Parse(time.RFC3339, p.BeginsAt)
			if err != nil {
				continue
			}
			o, err := firstDec(p.Open)
			if err != nil {
				return err
			}
			h, err := firstDec(p.High)
			if err != nil {
				return err
			}
			l, err := firstDec(p.Low)
			if err != nil {
				return err
			}
			cl, err := firstDec(p.Close)
			if err != nil {
				return err
			}
			r.Bars = append(r.Bars, IndexBar{InstrumentID: id, Time: ts, Open: o, High: h, Low: l, Close: cl, Interpolated: p.Interpolated})
		}
	}
	return nil
}

func (r *FinancialsResult) UnmarshalJSON(b []byte) error {
	type row struct {
		Symbol      string `json:"symbol"`
		Period      string `json:"period"`
		Revenue     any    `json:"revenue"`
		GrossProfit any    `json:"gross_profit"`
		NetIncome   any    `json:"net_income"`
		NetMargin   any    `json:"net_margin"`
	}
	rows, _, err := wire.UnmarshalRows[row](b, "financials", "results")
	if err != nil {
		return err
	}
	r.Periods = make([]FinancialPeriod, 0, len(rows))
	for _, row := range rows {
		rev, err := firstDec(row.Revenue)
		if err != nil {
			return err
		}
		gp, err := firstDec(row.GrossProfit)
		if err != nil {
			return err
		}
		ni, err := firstDec(row.NetIncome)
		if err != nil {
			return err
		}
		nm, err := firstDec(row.NetMargin)
		if err != nil {
			return err
		}
		r.Periods = append(r.Periods, FinancialPeriod{
			Symbol: row.Symbol, Period: row.Period, Revenue: rev, GrossProfit: gp, NetIncome: ni, NetMargin: nm,
		})
	}
	return nil
}

func (r *EarningsResultsResult) UnmarshalJSON(b []byte) error {
	var wrap struct {
		NextReportDate string `json:"next_report_date"`
		ReportDate     string `json:"report_date"`
		Results        []struct {
			Report struct {
				Date string `json:"date"`
			} `json:"report"`
		} `json:"results"`
	}
	if err := json.Unmarshal(wire.Unwrap(b), &wrap); err != nil {
		return err
	}
	r.NextReportDate = wrap.NextReportDate
	r.ReportDate = wrap.ReportDate
	if r.ReportDate == "" && len(wrap.Results) > 0 {
		r.ReportDate = wrap.Results[0].Report.Date
	}
	if r.NextReportDate == "" {
		r.NextReportDate = r.ReportDate
	}
	return nil
}

func (r *EarningsCalendarResult) UnmarshalJSON(b []byte) error {
	type row struct {
		Symbol     string `json:"symbol"`
		ReportDate string `json:"report_date"`
		Date       string `json:"date"`
	}
	rows, _, err := wire.UnmarshalRows[row](b, "results", "earnings")
	if err != nil {
		return err
	}
	r.Events = make([]EarningsEvent, 0, len(rows))
	for _, row := range rows {
		d := row.ReportDate
		if d == "" {
			d = row.Date
		}
		r.Events = append(r.Events, EarningsEvent{Symbol: row.Symbol, ReportDate: d})
	}
	return nil
}

func (r *SECFilingIndexResult) UnmarshalJSON(b []byte) error {
	type row struct {
		FilingID string `json:"filing_id"`
		ID       string `json:"id"`
		FormType string `json:"form_type"`
		FiledAt  string `json:"filed_at"`
		Date     string `json:"date"`
	}
	rows, next, err := wire.UnmarshalRows[row](b, "filings", "results")
	if err != nil {
		return err
	}
	r.NextCursor = next
	r.Filings = make([]SECFilingRef, 0, len(rows))
	for _, row := range rows {
		id := row.FilingID
		if id == "" {
			id = row.ID
		}
		when := row.FiledAt
		if when == "" {
			when = row.Date
		}
		r.Filings = append(r.Filings, SECFilingRef{FilingID: id, FormType: row.FormType, FiledAt: when})
	}
	return nil
}

func (r *SECFilingResult) UnmarshalJSON(b []byte) error {
	var wrap struct {
		FilingID string `json:"filing_id"`
		ID       string `json:"id"`
		Text     string `json:"text"`
		Sections []struct {
			ID    string `json:"id"`
			Title string `json:"title"`
			Text  string `json:"text"`
		} `json:"sections"`
		TOC []struct {
			ID    string `json:"id"`
			Title string `json:"title"`
		} `json:"table_of_contents"`
	}
	if err := json.Unmarshal(wire.Unwrap(b), &wrap); err != nil {
		return err
	}
	r.FilingID = wrap.FilingID
	if r.FilingID == "" {
		r.FilingID = wrap.ID
	}
	r.Text = wrap.Text
	for _, s := range wrap.Sections {
		r.Sections = append(r.Sections, SECSection{ID: s.ID, Title: s.Title, Text: s.Text})
	}
	if len(r.Sections) == 0 {
		for _, s := range wrap.TOC {
			r.Sections = append(r.Sections, SECSection{ID: s.ID, Title: s.Title})
		}
	}
	return nil
}

func (r *SECFilingFactsResult) UnmarshalJSON(b []byte) error {
	type row struct {
		Concept string `json:"concept"`
		Value   string `json:"value"`
		Unit    string `json:"unit"`
	}
	rows, _, err := wire.UnmarshalRows[row](b, "facts", "results")
	if err != nil {
		return err
	}
	r.Facts = make([]SECFact, 0, len(rows))
	for _, row := range rows {
		r.Facts = append(r.Facts, SECFact{Concept: row.Concept, Value: row.Value, Unit: row.Unit})
	}
	return nil
}

func (r *SECFilingFactsCatalogResult) UnmarshalJSON(b []byte) error {
	type row struct {
		Name    string `json:"name"`
		Concept string `json:"concept"`
	}
	rows, _, err := wire.UnmarshalRows[row](b, "concepts", "results")
	if err != nil {
		return err
	}
	r.Concepts = make([]SECConcept, 0, len(rows))
	for _, row := range rows {
		n := row.Name
		if n == "" {
			n = row.Concept
		}
		r.Concepts = append(r.Concepts, SECConcept{Name: n})
	}
	return nil
}