package db

// Project is the top-level entity. One project ↔ one .excalidraw drawing.
type Project struct {
	ID          int64  `json:"id"`
	Name        string `json:"name"`
	DrawingName string `json:"drawing_name"`
	Description string `json:"description"`
	CreatedAt   string `json:"created_at"`
	UpdatedAt   string `json:"updated_at"`
}

// CableType is global. Renaming/recolouring affects every project.
type CableType struct {
	ID        int64  `json:"id"`
	Name      string `json:"name"`
	Color     string `json:"color"`
	CreatedAt string `json:"created_at"`
	UpdatedAt string `json:"updated_at"`
}

// Frame is a sub-zone inside a project (`desk`, `rack`, …).
type Frame struct {
	ID            int64   `json:"id"`
	ProjectID     int64   `json:"project_id"`
	Name          string  `json:"name"`
	X             float64 `json:"x"`
	Y             float64 `json:"y"`
	Width         float64 `json:"width"`
	Height        float64 `json:"height"`
	ExcalidrawID  *string `json:"excalidraw_id,omitempty"`
	CreatedAt     string  `json:"created_at"`
	UpdatedAt     string  `json:"updated_at"`
}

// Device is a hardware item inside a project, optionally inside a frame.
// v4: type_id (nullable) lets a device inherit its port profile from a
// device_types catalog row.
type Device struct {
	ID            int64   `json:"id"`
	ProjectID     int64   `json:"project_id"`
	FrameID       *int64  `json:"frame_id"`           // nullable: device "outside" any frame
	TypeID        *int64  `json:"type_id"`            // nullable: freeform device when null
	Name          string  `json:"name"`
	Color         string  `json:"color"`
	X             float64 `json:"x"`
	Y             float64 `json:"y"`
	Width         float64 `json:"width"`
	Height        float64 `json:"height"`
	ExcalidrawID  *string `json:"excalidraw_id,omitempty"`
	CreatedAt     string  `json:"created_at"`
	UpdatedAt     string  `json:"updated_at"`
}

// DeviceType is a catalog row. Built-in rows have ProjectID nil and
// BuiltIn true. Project-custom rows have ProjectID set.
type DeviceType struct {
	ID          int64             `json:"id"`
	ProjectID   *int64            `json:"project_id"`
	Name        string            `json:"name"`
	Kind        string            `json:"kind"`
	Icon        *string           `json:"icon,omitempty"`
	Description string            `json:"description"`
	BuiltIn     bool              `json:"built_in"`
	Ports       []DeviceTypePort  `json:"ports"`
	CreatedAt   string            `json:"created_at"`
	UpdatedAt   string            `json:"updated_at"`
}

// DeviceTypePort is a row of a type's port profile. The seeder uses
// (cable_type_id, count, label_prefix, edge, sort_order) to lay out
// concrete ports on a freshly-created device.
type DeviceTypePort struct {
	ID            int64  `json:"id"`
	DeviceTypeID  int64  `json:"device_type_id"`
	CableTypeID   int64  `json:"cable_type_id"`
	LabelPrefix   string `json:"label_prefix"`
	Count         int    `json:"count"`
	Edge          string `json:"edge"`
	SortOrder     int    `json:"sort_order"`
}

// Port is a connector on a device. cable_type colour drives the visual
// rendering; ports are instance-owned even when seeded from a type.
type Port struct {
	ID            int64   `json:"id"`
	ProjectID     int64   `json:"project_id"`
	DeviceID      int64   `json:"device_id"`
	TypeID        int64   `json:"type_id"`         // cable type
	Label         *string `json:"label"`
	XOffset       float64 `json:"x_offset"`
	YOffset       float64 `json:"y_offset"`
	ExcalidrawID  *string `json:"excalidraw_id,omitempty"`
	CreatedAt     string  `json:"created_at"`
	UpdatedAt     string  `json:"updated_at"`
}

// ConnectionRequirement is the solver's per-project input.
// pair_lo/pair_hi are the ordered (MIN,MAX) of (from, to) so the
// UNIQUE on (project_id, pair_lo, pair_hi, preferred_cable_type_id)
// prevents (A,B,T) AND (B,A,T) from coexisting.
type ConnectionRequirement struct {
	ID                    int64  `json:"id"`
	ProjectID             int64  `json:"project_id"`
	FromDeviceID          int64  `json:"from_device_id"`
	ToDeviceID            int64  `json:"to_device_id"`
	PreferredCableTypeID  *int64 `json:"preferred_cable_type_id"`
	MustConnect           bool   `json:"must_connect"`
	Notes                 string `json:"notes"`
	CreatedAt             string `json:"created_at"`
	UpdatedAt             string `json:"updated_at"`
}

// Cable is a typed connection. Each endpoint is exactly one of
// (port, device, io-marker). Auto=true means the solver placed it.
type Cable struct {
	ID            int64   `json:"id"`
	ProjectID     int64   `json:"project_id"`
	TypeID        int64   `json:"type_id"`
	Label         *string `json:"label"`
	FromPortID    *int64  `json:"from_port_id"`
	FromDeviceID  *int64  `json:"from_device_id"`
	FromIOID      *int64  `json:"from_io_id"`
	ToPortID      *int64  `json:"to_port_id"`
	ToDeviceID    *int64  `json:"to_device_id"`
	ToIOID        *int64  `json:"to_io_id"`
	Auto          bool    `json:"auto"`
	ExcalidrawID  *string `json:"excalidraw_id,omitempty"`
	CreatedAt     string  `json:"created_at"`
	UpdatedAt     string  `json:"updated_at"`
}

// Bundle is a named group of cables that physically run together.
type Bundle struct {
	ID         int64   `json:"id"`
	ProjectID  int64   `json:"project_id"`
	Name       string  `json:"name"`
	Auto       bool    `json:"auto"`
	CableIDs   []int64 `json:"cable_ids"`
	CreatedAt  string  `json:"created_at"`
	UpdatedAt  string  `json:"updated_at"`
}

// SetupTemplate is a named recipe of device-types + requirements.
type SetupTemplate struct {
	ID           int64                       `json:"id"`
	Name         string                      `json:"name"`
	Description  string                      `json:"description"`
	BuiltIn      bool                        `json:"built_in"`
	Devices      []SetupTemplateDevice       `json:"devices"`
	Requirements []SetupTemplateRequirement  `json:"requirements"`
	CreatedAt    string                      `json:"created_at"`
	UpdatedAt    string                      `json:"updated_at"`
}

type SetupTemplateDevice struct {
	ID             int64       `json:"id"`
	TemplateID     int64       `json:"template_id"`
	DeviceTypeID   int64       `json:"device_type_id"`
	DeviceType     *DeviceType `json:"device_type,omitempty"`
	SuggestedName  *string     `json:"suggested_name"`
	SortOrder      int         `json:"sort_order"`
}

type SetupTemplateRequirement struct {
	ID                      int64  `json:"id"`
	TemplateID              int64  `json:"template_id"`
	FromTemplateDeviceID    int64  `json:"from_template_device_id"`
	ToTemplateDeviceID      int64  `json:"to_template_device_id"`
	PreferredCableTypeID    *int64 `json:"preferred_cable_type_id"`
	MustConnect             bool   `json:"must_connect"`
}

// SolveResult is the response shape from POST /api/projects/:pid/solve.
type SolveResult struct {
	CablesAdded     []Cable                `json:"cables_added"`
	CablesKept      []int64                `json:"cables_kept"`
	CablesRemoved   []int64                `json:"cables_removed"`
	BundlesAdded    []Bundle               `json:"bundles_added"`
	BundlesRemoved  []int64                `json:"bundles_removed"`
	Unsatisfied     []UnsatisfiedReq       `json:"unsatisfied"`
	Warnings        []string               `json:"warnings"`
}

type UnsatisfiedReq struct {
	RequirementID int64  `json:"requirement_id"`
	Reason        string `json:"reason"`
	WhichSide     string `json:"which_side,omitempty"` // "from" | "to" | "" when both/neither
	CableType     string `json:"cable_type,omitempty"`  // when known
}

// ApplyTemplateResult is the response from POST /apply-template.
type ApplyTemplateResult struct {
	FramesAdded         []Frame                 `json:"frames_added"`
	DevicesAdded        []Device                `json:"devices_added"`
	RequirementsAdded   []ConnectionRequirement `json:"requirements_added"`
	SkippedDevices      []SkippedTemplateDevice `json:"skipped_devices"`
	RequirementsSkipped []SkippedTemplateReq    `json:"requirements_skipped"`
}

type SkippedTemplateDevice struct {
	TemplateDeviceID int64  `json:"template_device_id"`
	Reason           string `json:"reason"`
}
type SkippedTemplateReq struct {
	TemplateRequirementID int64  `json:"template_requirement_id"`
	Reason                string `json:"reason"`
}

// Snapshot is the editor's one-shot loader payload for a single project.
// Arrays for collections still gated by future slices stay non-nil [] so
// JSON encodes as [] not null.
type Snapshot struct {
	Project                Project                 `json:"project"`
	Frames                 []Frame                 `json:"frames"`
	Devices                []Device                `json:"devices"`
	Ports                  []Port                  `json:"ports"`
	Cables                 []Cable                 `json:"cables"`
	IOMarkers              []IOMarker              `json:"io_markers"`
	Bundles                []Bundle                `json:"bundles"`
	CableTypes             []CableType             `json:"cable_types"`
	ConnectionRequirements []ConnectionRequirement `json:"connection_requirements"`
	Clamps                 []Clamp                 `json:"clamps"`
	CableClamps            []CableClamp            `json:"cable_clamps"`
}

// Clamp is a routing anchor on the canvas. Cables route through clamps
// in `ord` sequence (see cable_clamps), giving m a physical handle on
// where bundles converge.
type Clamp struct {
	ID           int64   `json:"id"`
	ProjectID    int64   `json:"project_id"`
	X            float64 `json:"x"`
	Y            float64 `json:"y"`
	Label        string  `json:"label"`
	FrameID      *int64  `json:"frame_id"`
	ExcalidrawID *string `json:"excalidraw_id,omitempty"`
	CreatedAt    string  `json:"created_at"`
	UpdatedAt    string  `json:"updated_at"`
}

// CableClamp is one (cable, clamp, ord) row. Ord is 1-based along the
// cable's from→to direction.
type CableClamp struct {
	CableID int64 `json:"cable_id"`
	ClampID int64 `json:"clamp_id"`
	Ord     int   `json:"ord"`
}