package link

import (
	"encoding/json"
	"strconv"
	"strings"
	"time"

	"git.novox.be/novox/mesh-sdk/go/delivery"
)

// The shape of a build's outcome as the retired build seat said it (novox/hq ADR 0121, ADR 0501 §1). Nothing asks a
// build or hears an outcome any more (R4g): a module is registered from the builder's done key. The shape stays for the
// tests of what registration judges (who may register a module, from which source, against which list of predefined
// keys), which hand a build to the controller in this form; it carries nothing of the retired merge check.

// NewBuildID is the correlation for a build asked at that moment: `build-<unix nanoseconds>`, and BuildAskedAt reads the
// moment back (novox/hq 04-ISSUES/219): what orders two builds of one module.
func NewBuildID(asked time.Time) string {
	return "build-" + strconv.FormatInt(asked.UnixNano(), 10)
}

// BuildAskedAt is when the build with this id was asked, as NewBuildID wrote it; false for an id of any other shape.
func BuildAskedAt(id string) (time.Time, bool) {
	digits, ok := strings.CutPrefix(id, "build-")
	if !ok || digits == "" {
		return time.Time{}, false
	}
	nanos, err := strconv.ParseInt(digits, 10, 64)
	if err != nil || nanos < time.Date(2020, 1, 1, 0, 0, 0, 0, time.UTC).UnixNano() {
		return time.Time{}, false
	}
	return time.Unix(0, nanos).UTC(), true
}

// SourceOnSeat names a repository by the seat whose holder serves it and its path there.
type SourceOnSeat struct {
	Seat       string `json:"seat"`
	Repository string `json:"repository"`
}

// BuildResult is what a builder said back.
type BuildResult struct {
	ID         string `json:"id"`
	Repository string `json:"repository"`
	// Path is echoed back, so what the mesh records as this module's source is what was actually built.
	Path string `json:"path,omitempty"`
	Ref  string `json:"ref,omitempty"`
	// On is the machine that did it.
	On string `json:"on"`
	// Module is what was built, read out of the manifest.
	Module string `json:"module,omitempty"`
	// Commit is what was actually built.
	Commit string `json:"commit,omitempty"`
	// Manifest is the module as the mesh should hold it, artifacts resolved to digests.
	Manifest json.RawMessage `json:"manifest,omitempty"`
	// Made is each artifact, for reporting.
	Made []MadeArtifact `json:"made,omitempty"`
	// Against is every pinned image this was built on top of.
	Against []string `json:"against,omitempty"`
	// Mirrored is every base this build copied into the artifact store, as pinned (novox/hq ADR 0257).
	Mirrored []string `json:"mirrored,omitempty"`
	// Read is every repository this build read source from besides the module's own.
	Read []ReadRepository `json:"read,omitempty"`
	// Sources are what the build was made from, as files, per repository (novox/hq ADR 0267).
	Sources []BuildSource `json:"sources,omitempty"`
	// Trunk is the repository's default branch at the build, OnTrunk whether the commit built is on it, and Branches
	// every branch it is on (novox/hq ADR 0238).
	Trunk    string   `json:"trunk,omitempty"`
	OnTrunk  bool     `json:"on-trunk,omitempty"`
	Branches []string `json:"branches,omitempty"`
	// SourceFingerprint is what the build was made from, hashed (novox/hq issue 280); SourceInputs what it was computed
	// from (ADR 0437 §5, issue 1215).
	SourceFingerprint string                 `json:"source-fingerprint,omitempty"`
	SourceInputs      *delivery.SourceInputs `json:"source-inputs,omitempty"`
	// Failed is why, when it did.
	Failed string `json:"failed,omitempty"`
	// Predefined is the list of predefined keys at the root of the repository at the commit built (novox/hq ADR 0348 §7).
	Predefined *PredefinedList `json:"predefined,omitempty"`
	// Source is the request's, echoed: the seat form of the repository, for whoever registers.
	Source *SourceOnSeat `json:"source,omitempty"`
	// DryRun is the request's, echoed: an outcome nobody may take in (novox/hq issue 240).
	DryRun bool `json:"dry-run,omitempty"`
}

// PredefinedList is the list of predefined keys a build read (novox/hq ADR 0348 §7): Keys its canonical text, a
// JSON object of keys, and Generation how many commits the commit built stands on.
type PredefinedList struct {
	Keys       json.RawMessage `json:"keys"`
	Generation int             `json:"generation,omitempty"`
}

// ReadRepository is a repository a build read source from besides the module's own, at the ref it read.
type ReadRepository struct {
	Repository string `json:"repository"`
	Ref        string `json:"ref,omitempty"`
}

// BuildSource is the build source a build read in one repository (novox/hq ADR 0267).
type BuildSource struct {
	Repository string   `json:"repository,omitempty"`
	Ref        string   `json:"ref,omitempty"`
	Paths      []string `json:"paths"`
}

// MadeArtifact is one thing a build produced, as a person would want it reported.
type MadeArtifact struct {
	Name      string `json:"name"`
	Kind      string `json:"kind"`
	Reference string `json:"reference"`
}