import type { ProjectMode } from '../project-system/types';

export interface CsoundTemplate {
  id: string;
  name: string;
  mode: ProjectMode;
  content: string;
}

const EMPTY_TEMPLATE: CsoundTemplate = {
  id: 'empty',
  name: 'Empty',
  mode: 'composition',
  content: `<CsoundSynthesizer>
<CsOptions>
-odac
</CsOptions>
<CsInstruments>

sr = 48000
ksmps = 32
nchnls = 2
0dbfs = 1

</CsInstruments>
<CsScore>

</CsScore>
</CsoundSynthesizer>
`
};

const CLASSIC_TEMPLATE: CsoundTemplate = {
  id: 'classic',
  name: 'Classic',
  mode: 'composition',
  content: `<CsoundSynthesizer>
<CsOptions>
-odac
</CsOptions>
<CsInstruments>

sr = 48000
ksmps = 32
nchnls = 2
0dbfs = 1

instr 1
  iFreq = p4
  iAmp = p5

  kEnv madsr 0.01, 0.1, 0.6, 0.2

  aOsc oscili iAmp * kEnv, iFreq

  outs aOsc, aOsc
endin

</CsInstruments>
<CsScore>
i 1 0.0 0.5 261.63 0.3
i 1 0.5 0.5 329.63 0.3
i 1 1.0 0.5 392.00 0.3
i 1 1.5 0.5 523.25 0.3
</CsScore>
</CsoundSynthesizer>
`
};

const LIVECODING_TEMPLATE: CsoundTemplate = {
  id: 'livecoding',
  name: 'Live Coding',
  mode: 'livecoding',
  content: `gaReverb init 0

instr 1
  kFreq chnget "freq"
  kFreq = (kFreq == 0 ? p4 : kFreq)
  kAmp = p5
  kEnv linsegr 0, 0.01, 1, 0.1, 0.7, 0.2, 0
  aOsc vco2 kAmp * kEnv, kFreq
  aFilt moogladder aOsc, 2000, 0.3
  outs aFilt, aFilt
  gaReverb = gaReverb + aFilt * 0.3
endin

instr 2
  iFreq = p4
  iAmp = p5
  kEnv linsegr 0, 0.005, 1, 0.05, 0.5, 0.1, 0
  aOsc vco2 iAmp * kEnv, iFreq, 10
  aFilt butterlp aOsc, 800
  outs aFilt, aFilt
endin

instr 99
  aL, aR freeverb gaReverb, gaReverb, 0.8, 0.5
  outs aL, aR
  gaReverb = 0
endin

; Start reverb (always on)
i 99 0 -1


i 1 0 2 440 0.3

; Arpeggio
i 1 0 0.5 261.63 0.2
i 1 0.5 0.5 329.63 0.2
i 1 1.0 0.5 392.00 0.2
i 1 1.5 0.5 523.25 0.2

; Bass line
i 2 0 0.5 130.81 0.4
i 2 0.5 0.5 146.83 0.4
i 2 1.0 0.5 164.81 0.4
i 2 1.5 0.5 130.81 0.4

; Long note for channel control
i 1 0 10 440 0.3

freq = 440

freq = 554.37

freq = 659.25

; Turn off instrument 1
i -1 0 0
`
};

const TEMPLATE_REGISTRY: CsoundTemplate[] = [
  EMPTY_TEMPLATE,
  LIVECODING_TEMPLATE,
  CLASSIC_TEMPLATE
];

export class TemplateRegistry {
  private templates: Map<string, CsoundTemplate>;

  constructor() {
    this.templates = new Map(
      TEMPLATE_REGISTRY.map(template => [template.id, template])
    );
  }

  getAll(): CsoundTemplate[] {
    return Array.from(this.templates.values());
  }

  getById(id: string): CsoundTemplate | undefined {
    return this.templates.get(id);
  }

  getEmpty(): CsoundTemplate {
    return EMPTY_TEMPLATE;
  }
}

export const templateRegistry = new TemplateRegistry();